|  | Topic : Dirilling out the airbox on a Storm |  |
| | | Weimer369 | | Set |  |  | | Reg. Date | : | 03/09/2015 | | Posts | : | 65 | | Location | : | Canada |
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| | Posted : 02 Jul 2019 - 21:32 Post title : Dirilling out the airbox on a Storm | | | I came across this post on the other forum about opening up the bottom of the airbox for a Thunderbird:
Link
Seems like an interesting idea and an alternative to ripping half of the bike apart to install the BC airbox eliminator.
To summarize... Drill a hole in the bottom of the air filter ( preferably K&N ), then drill the same sized hole through the bottom of the stock airbox to allow the bike to pull air through the filter from both the top under the seat, and now the bottom under the bike. Looks like doing it this way the bike will pull air THROUGH the filter from the top and bottom so it shouldn't introduce any dirt \ debris into the engine. Apparently it was a pretty common mod on the Americas back in the day.
Has anyone tried this ?
| 2014 Thunderbird Storm / Vance & Hines / K&N High flow air filter / Mustang Solo Seat
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| | | AZCactus | | Taranis | |  | | Reg. Date | : | 01/05/2013 | | Posts | : | 4,524 | | Location | : | AZ |
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| | Posted : 04 Jul 2019 - 04:16 Post title : Re: Dirilling out the airbox on a Storm (Re: Weimer369) | | | As for drilling an airbox, I was never sold on the idea.
anyway invested in a BC Kit that sits on the shelf awaiting a tire change 
| 2009 Thunderbird 1700 Big Bore
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| | | Leethal | | Zeus | |  | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,407 | | Location | : | Australia |
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| | Posted : 04 Jul 2019 - 06:03 Post title : Re: Dirilling out the airbox on a Storm (Re: Weimer369) | | | Did anyone publish dyno results? I can't see the point if it doesn't give some HP.
| Experience is something you get just after you needed it 
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Hagon Nitro shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
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| | | daz | | Zeus | |  | | Reg. Date | : | 12/05/2009 | | Posts | : | 7,686 | | Location | : | United States |
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| | Posted : 28 Jul 2019 - 16:06 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | | I did it to my speedmaster and it was a pretty serious power gain. I was thinking if that for the bird when i first got it but i couldn't see a way to do it that would not let unfiltered air in due to the difference in the bottom of the airbox compared to the speedmaster. I've had the bird 10 years so it's been about that long since i considered this so i can't recall the exact reason but suffice it to say i just recall it didn't look very doable. But on the speedmaster it was maybe the biggest power gain i've ever gotten doing such a apparently minor mod. I also rejetted the bike but if i recall correctly it gave up a nice boost even before i did that. I had put tors on it, used iridium plugs, (which believe it or not made a easily notable difference) had nology coils, and the box mod did more than the rest combined.
| 2010 Blue/White Thunderbird, "Brutus". 1700 kit, short tors, gutted cat, UNI filter, filter seal off, custom tune. Brutus in his native habitat: Link
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| | | Leethal | | Zeus | | | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,407 | | Location | : | Australia |
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| | Posted : 28 Jul 2019 - 23:14 Post title : Re: Dirilling out the airbox on a Storm (Re: daz) | | | I think I have read on here some time ago that the BC kit gave a 2 or 3 hp increase, if that is the case I wouldn't bother.
| Experience is something you get just after you needed it
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Hagon Nitro shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
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| | | daz | | Zeus | | | | Reg. Date | : | 12/05/2009 | | Posts | : | 7,686 | | Location | : | United States |
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| | Posted : 29 Jul 2019 - 01:35 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | |
Leethal wrote:
I think I have read on here some time ago that the BC kit gave a 2 or 3 hp increase, if that is the case I wouldn't bother. |
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Wow, if thats the case i wouldn't either, even if given to me free. Not worth the work. I would guess drilling the speedmaster's box gave me that kind of increase at least. I didn't dyno it but it sure felt like 5hp to me, but even if 3 it made a considerable difference because 3 HP on a 54 HP engine is gonna feel a like lot more improvement than 3 HP on a 100 HP engine. In any case it was considerable. But i'd say it was more torque than HP. Still like to see how it would do on the bird but as i said i don't think it's doable w/o compromising the filtering. Maybe i'll have another look and see if theres a way. It may have been that it was doable but only a very small hole that wouldn't likely make a difference.
| 2010 Blue/White Thunderbird, "Brutus". 1700 kit, short tors, gutted cat, UNI filter, filter seal off, custom tune. Brutus in his native habitat: Link
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| | | GerPa | | Jupiter | |  | | Reg. Date | : | 10/12/2011 | | Posts | : | 1,919 | | Location | : | Mackay, Central Queensland, Australia |
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| | Posted : 29 Jul 2019 - 02:07 Post title : Re: Dirilling out the airbox on a Storm (Re: daz) | | |
daz wrote:
Leethal wrote:
I think I have read on here some time ago that the BC kit gave a 2 or 3 hp increase, if that is the case I wouldn't bother. |
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Wow, if thats the case i wouldn't either, even if given to me free. Not worth the work. I would guess drilling the speedmaster's box gave me that kind of increase at least. I didn't dyno it but it sure felt like 5hp to me, but even if 3 it made a considerable difference because 3 HP on a 54 HP engine is gonna feel a like lot more improvement than 3 HP on a 100 HP engine. In any case it was considerable. But i'd say it was more torque than HP. Still like to see how it would do on the bird but as i said i don't think it's doable w/o compromising the filtering. Maybe i'll have another look and see if theres a way. It may have been that it was doable but only a very small hole that wouldn't likely make a difference. |
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Why would you waste your time. The photo below depicts the internal of the Airbox and you would have to drill a hole in the middle flat section and then start sucking Moisture and Crap from underneath the bike into a clean aircleaner.
| May-2011-1600, 20306 Tune, Mustang Vintage Solo Seat, Meerkat Cat Bypass, + Meerkat Modified Short TORS   ,K&N Air Cleaner,K&N Oil Filter, JBQ lifting system, Gold Plug Magnetic Sump Plug,Dart Fly screen, Rivco Risers, GiPro Gear Indicator, Breakaway Cruise Control, Avon ISO Grips, Scorpion Western Low Handlebars, Kury Switchblade Pegs, Garmin Zumo390LM,Michelin RC2 on Front RC 3 on ,Modified Rear Drive Pulley Hub Bearings (Mat1600/Alex4 Modification) Front Susp: Std & 7.5W Oil /126mm Air Gap & Rear:Hagon Nitro's with 26Kg/cm Springs + Lots of other "Bling" stuff.
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| | | daz | | Zeus | | | | Reg. Date | : | 12/05/2009 | | Posts | : | 7,686 | | Location | : | United States |
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| | Posted : 29 Jul 2019 - 02:17 Post title : Re: Dirilling out the airbox on a Storm (Re: GerPa) | | | I never had an issue because i don't ride in rain or dirt roads or any of that. I don't even ride in cold weather. In live in Ca. and 98% of my riding is in sunny warm weather. Si that wasn't a concern.
That pic shows why i diodn't drill the bird. The speedmaster had a flat bottom so the hole i drilled was bigger than that raised area in the bird's box. It was almost like doubling the intake opening. Lots of people did it back them with speedmasters and americas and reported really good gains. If i rode in wet weather then yes, i'd have passed.
| 2010 Blue/White Thunderbird, "Brutus". 1700 kit, short tors, gutted cat, UNI filter, filter seal off, custom tune. Brutus in his native habitat: Link
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| | | AZCactus | | Taranis | | | | Reg. Date | : | 01/05/2013 | | Posts | : | 4,524 | | Location | : | AZ |
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| | Posted : 29 Jul 2019 - 04:19 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | | Leethal wrote:
I think I have read on here some time ago that the BC kit gave a 2 or 3 hp increase, if that is the case I wouldn't bother. |
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consider a package. For example air box removal, big bore 1700, short tors, cat bypass and custom map...you'd be impressed 
and I read "THIS PRODUCT CANNOT BE INSTALLED ON A VEHICLE REGISTERED IN THE STATE OF CALIFORNIA". Got to be good, right?? 
the guy in the Video commented "This is a very noticeable difference. You can also hear it. BC is spot on with the description: "Dollar for dollar, this is the best performance upgrade you can get for your Triumph Cruiser." I think you add about 13HP." Link
Of course that's his opinion but I like it
| 2009 Thunderbird 1700 Big Bore
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| | | MotorMac | | Jupiter | |  | | Reg. Date | : | 29/08/2010 | | Posts | : | 1,790 | | Location | : | Nor Cal, United States |
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| | Posted : 29 Jul 2019 - 04:54 Post title : Re: Dirilling out the airbox on a Storm (Re: AZCactus) | | | Sure, rub it in why doncha. It's still legal to... uh.... give me a minute.... breathe in CA.
Long as we're not on fire anyway. At least it's legal to inhale. Not sure about exhale. CO2 is hazardous y'know.
BTW: Trump campaign is selling red plastic straws.
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| | | AZCactus | | Taranis | | | | Reg. Date | : | 01/05/2013 | | Posts | : | 4,524 | | Location | : | AZ |
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| | Posted : 29 Jul 2019 - 04:59 Post title : Re: Dirilling out the airbox on a Storm (Re: MotorMac) | | | Hey MotorMac! ...can't beat your sense of humor
| 2009 Thunderbird 1700 Big Bore
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| | | Leethal | | Zeus | | | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,407 | | Location | : | Australia |
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| | Posted : 29 Jul 2019 - 05:23 Post title : Re: Dirilling out the airbox on a Storm (Re: AZCactus) | | | AZCactus wrote:
Leethal wrote:
I think I have read on here some time ago that the BC kit gave a 2 or 3 hp increase, if that is the case I wouldn't bother. |
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consider a package. For example air box removal, big bore 1700, short tors, cat bypass and custom map...you'd be impressed
and I read "THIS PRODUCT CANNOT BE INSTALLED ON A VEHICLE REGISTERED IN THE STATE OF CALIFORNIA". Got to be good, right??
the guy in the Video commented "This is a very noticeable difference. You can also hear it. BC is spot on with the description: "Dollar for dollar, this is the best performance upgrade you can get for your Triumph Cruiser." I think you add about 13HP." Link
Of course that's his opinion but I like it |
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13hp for just the BC air box replacement? Is that dyno results do you know?
I have the short tors, bypass, dyno tune, K&N filter which as I've mentioned previously doesn't leave me too far behind any of the 1700's I ride with, I don't regard an extra 100cc's as "big bore" improvement, back in the 70's I fitted a 605 kit to my 500/4 and later a Yoshimura cam, the camshaft made a huge difference, that was a decent upgrade as was a 600 kit for my XT500, I would rather spend money on cams for the 1600 one day when and if it ever needs a rebuild. I do keep an eye out though for a low mileage 1700 storm wreck, that would give me something to play with.
Here it is Steve ThundeRat:-
I've done the BC airbox elimination kit and in all honesty do not think it is worth the money. You have to pull the rear end off the bike and stuff around to get it to fit. It gave me about a 3hp increase but it does make the bike run smoother.
My bike has Foran exhaust, no cat, modified cams and is getting the supercharger fitted but for all the benefit you get from just the airbox kit my advice is save your money.
Steve
| Experience is something you get just after you needed it
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Hagon Nitro shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
| | Post edited by Leethal on 29 Jul 2019 - 05:32 |
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| | | fab | | Thor | |  | | Reg. Date | : | 12/10/2009 | | Posts | : | 2,515 | | Location | : | wyong, nsw, Australia |
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| | Posted : 29 Jul 2019 - 06:54 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | |
Leethal wrote:
AZCactus wrote:
Leethal wrote:
I think I have read on here some time ago that the BC kit gave a 2 or 3 hp increase, if that is the case I wouldn't bother. |
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consider a package. For example air box removal, big bore 1700, short tors, cat bypass and custom map...you'd be impressed
and I read "THIS PRODUCT CANNOT BE INSTALLED ON A VEHICLE REGISTERED IN THE STATE OF CALIFORNIA". Got to be good, right??
the guy in the Video commented "This is a very noticeable difference. You can also hear it. BC is spot on with the description: "Dollar for dollar, this is the best performance upgrade you can get for your Triumph Cruiser." I think you add about 13HP." Link
Of course that's his opinion but I like it |
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13hp for just the BC air box replacement? Is that dyno results do you know?
I have the short tors, bypass, dyno tune, K&N filter which as I've mentioned previously doesn't leave me too far behind any of the 1700's I ride with, I don't regard an extra 100cc's as "big bore" improvement, back in the 70's I fitted a 605 kit to my 500/4 and later a Yoshimura cam, the camshaft made a huge difference, that was a decent upgrade as was a 600 kit for my XT500, I would rather spend money on cams for the 1600 one day when and if it ever needs a rebuild. I do keep an eye out though for a low mileage 1700 storm wreck, that would give me something to play with.
Here it is Steve ThundeRat:-
I've done the BC airbox elimination kit and in all honesty do not think it is worth the money. You have to pull the rear end off the bike and stuff around to get it to fit. It gave me about a 3hp increase but it does make the bike run smoother.
My bike has Foran exhaust, no cat, modified cams and is getting the supercharger fitted but for all the benefit you get from just the airbox kit my advice is save your money.
Steve
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if you do go the cam route get the 1600 cams not the 1700 as the 1600 cams are better profile to fill and regrind.
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Remember, soft cocks hang around all life long, hard ones come and go
ahh f**k im deep
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| | | Leethal | | Zeus | | | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,407 | | Location | : | Australia |
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| | Posted : 29 Jul 2019 - 09:00 Post title : Re: Dirilling out the airbox on a Storm (Re: fab) | | | Thanks Jamie
| Experience is something you get just after you needed it
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Hagon Nitro shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
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| | | Slcharger | | Jupiter | |  | | Reg. Date | : | 18/02/2016 | | Posts | : | 1,661 | | Location | : | Denmark |
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| | Posted : 29 Jul 2019 - 09:22 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | | When I installed the BC Air kit, I exspected a lot, gave close to nothing. 
I enjoy the roar from the intake though.
I have still to see a dyno result where either decat or BC Air kit do any but minor increase in HP.
| Big Bird, Bordeaux with " Celtic theme " Airbrush, 2010, 1700CC, ABS, 65.000 km. Lowered with Nitros rear shocks, Linear front springs, Burchard forward footrest kit, Kuryakyn ISO grips, LOTS of chrome, SLcharger REV2+ tune, Modified Cee Baileys windshield, Oil pressure gauge, Air box elimination kit, Portet cylinderhead, Intake cam advanved 8 degree, Exhaust cam retarded 2 degree, 10.5 C/R, Knock sensor, Machined flywheel, DNA Chrome Spoke wheels, 18x8.5"- AVON AV72- 240/40/18, 21x3.5"- AVON AV71- 120/70/21, Corbin seat with backrest, 20W fork oil. Hiflo HF303RC oil filter, Penrite Racing 20-20W60 engine oil, Adjurl lights.
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| | | AZCactus | | Taranis | | | | Reg. Date | : | 01/05/2013 | | Posts | : | 4,524 | | Location | : | AZ |
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| | Posted : 29 Jul 2019 - 11:21 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | | Leethal wrote:
13hp for just the BC air box replacement? Is that dyno results do you know?
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I don't know. Also consider the BB hot cams (rumor has it ;) if you can find a kit.
| 2009 Thunderbird 1700 Big Bore
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| | | Leethal | | Zeus | | | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,407 | | Location | : | Australia |
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| | Posted : 29 Jul 2019 - 23:15 Post title : Re: Dirilling out the airbox on a Storm (Re: Slcharger) | | |
Slcharger wrote:
When I installed the BC Air kit, I exspected a lot, gave close to nothing.
I enjoy the roar from the intake though.
I have still to see a dyno result where either decat or BC Air kit do any but minor increase in HP.
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Looking at my dyno results I would say each little modification gives 2 or 3 hp.
I can't believe that the intake system was designed (limited) to only cater for a stock 1600, it's exactly the same for the 1700, so for a start there is a bit of flexibility right there. It would be nice to test each mod on a dyno separately but unless you have a mate with one it would cost thousands.
I can afford the SC kit but I don't want to affect my reliability as I do some big rides and often solo, when it comes to a rebuild then I may play around with the head, camshafts and then maybe the intake., or as I said find a 1700 motor complete and play with that, but then the BMW 1800 might change all that.
| Experience is something you get just after you needed it
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Hagon Nitro shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
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| | | Leethal | | Zeus | | | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,407 | | Location | : | Australia |
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| | Posted : 29 Jul 2019 - 23:16 Post title : Re: Dirilling out the airbox on a Storm (Re: AZCactus) | | |
AZCactus wrote:
Leethal wrote:
13hp for just the BC air box replacement? Is that dyno results do you know?
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I don't know. Also consider the BB hot cams (rumor has it ;) if you can find a kit.
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That's the problem mate, it's only a rumour
| Experience is something you get just after you needed it
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Hagon Nitro shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
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| | | Slcharger | | Jupiter | | | | Reg. Date | : | 18/02/2016 | | Posts | : | 1,661 | | Location | : | Denmark |
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| | Posted : 30 Jul 2019 - 07:30 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | |
Leethal wrote:
Looking at my dyno results I would say each little modification gives 2 or 3 hp.
I can't believe that the intake system was designed (limited) to only cater for a stock 1600, it's exactly the same for the 1700, so for a start there is a bit of flexibility right there. It would be nice to test each mod on a dyno separately but unless you have a mate with one it would cost thousands.
I can afford the SC kit but I don't want to affect my reliability as I do some big rides and often solo, when it comes to a rebuild then I may play around with the head, camshafts and then maybe the intake., or as I said find a 1700 motor complete and play with that, but then the BMW 1800 might change all that. |
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Lee, I agree that a gain of 2-3 HP is realistic, but that is not what I consider " Worth the money ".
I still advocate for the theory that as they designed the engine of the Bird, the layout was for a 1600 cc engine, not a 1700. The fact that they had to add 12 kg to the rotating mass on the crankshaft, just to make the damn thing drive able, on the prototype, and later in the production version, made the bike so much "way off" performance wise, compared with the initial intentions, that they decided to make a 1700 BB kit, to regain and improve performance. Later in 2010 ( approx 1 year after the introduction, if I remember right ) the 1600 cc was superseded by the 1700 cc models. Why so late ?? I guess they had a stockpile of 1600 cc components that they where not willing to scrap.
So the whole layout is 1600 cc designed for optimum performance with 1600 cc, but adapted to 1700 cc stretching the limits. That said, it's not impossible to gain more power, but it involves way hotter cams, witch again reduce bottom end torque.
I have access to a flow bench, and i have flowed the original air intake, including filter, and it flows enough CFM to not restrict the engine. A another reason the stock air filter performs so well, is the intake under the seat, drawing cold air, where the BC filter draws hotter air bypassing from the engine ( airbox not blocking the flow anymore, through the frame, and aft ).
Also the whole exhaust system is at it's limit, for an N/A 1700, and I don't mean only the cat, but the whole system.
The only realistic way to increase power, without changing to much, is forced induction.
| Big Bird, Bordeaux with " Celtic theme " Airbrush, 2010, 1700CC, ABS, 65.000 km. Lowered with Nitros rear shocks, Linear front springs, Burchard forward footrest kit, Kuryakyn ISO grips, LOTS of chrome, SLcharger REV2+ tune, Modified Cee Baileys windshield, Oil pressure gauge, Air box elimination kit, Portet cylinderhead, Intake cam advanved 8 degree, Exhaust cam retarded 2 degree, 10.5 C/R, Knock sensor, Machined flywheel, DNA Chrome Spoke wheels, 18x8.5"- AVON AV72- 240/40/18, 21x3.5"- AVON AV71- 120/70/21, Corbin seat with backrest, 20W fork oil. Hiflo HF303RC oil filter, Penrite Racing 20-20W60 engine oil, Adjurl lights.
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| | | GerPa | | Jupiter | | | | Reg. Date | : | 10/12/2011 | | Posts | : | 1,919 | | Location | : | Mackay, Central Queensland, Australia |
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| | Posted : 30 Jul 2019 - 08:17 Post title : Re: Dirilling out the airbox on a Storm (Re: Slcharger) | | | Yep. You are "On the Money Kim". as usual.
| May-2011-1600, 20306 Tune, Mustang Vintage Solo Seat, Meerkat Cat Bypass, + Meerkat Modified Short TORS ,K&N Air Cleaner,K&N Oil Filter, JBQ lifting system, Gold Plug Magnetic Sump Plug,Dart Fly screen, Rivco Risers, GiPro Gear Indicator, Breakaway Cruise Control, Avon ISO Grips, Scorpion Western Low Handlebars, Kury Switchblade Pegs, Garmin Zumo390LM,Michelin RC2 on Front RC 3 on ,Modified Rear Drive Pulley Hub Bearings (Mat1600/Alex4 Modification) Front Susp: Std & 7.5W Oil /126mm Air Gap & Rear:Hagon Nitro's with 26Kg/cm Springs + Lots of other "Bling" stuff.
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| | | Linkdog | | Thor | |  | | Reg. Date | : | 10/02/2011 | | Posts | : | 2,923 | | Location | : | Groveland, FL., United States |
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| | Posted : 30 Jul 2019 - 13:15 Post title : Re: Dirilling out the airbox on a Storm (Re: Slcharger) | | |
Slcharger wrote:
Leethal wrote:
Looking at my dyno results I would say each little modification gives 2 or 3 hp.
I can't believe that the intake system was designed (limited) to only cater for a stock 1600, it's exactly the same for the 1700, so for a start there is a bit of flexibility right there. It would be nice to test each mod on a dyno separately but unless you have a mate with one it would cost thousands.
I can afford the SC kit but I don't want to affect my reliability as I do some big rides and often solo, when it comes to a rebuild then I may play around with the head, camshafts and then maybe the intake., or as I said find a 1700 motor complete and play with that, but then the BMW 1800 might change all that. |
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Lee, I agree that a gain of 2-3 HP is realistic, but that is not what I consider " Worth the money ".
I still advocate for the theory that as they designed the engine of the Bird, the layout was for a 1600 cc engine, not a 1700. The fact that they had to add 12 kg to the rotating mass on the crankshaft, just to make the damn thing drive able, on the prototype, and later in the production version, made the bike so much "way off" performance wise, compared with the initial intentions, that they decided to make a 1700 BB kit, to regain and improve performance. Later in 2010 ( approx 1 year after the introduction, if I remember right ) the 1600 cc was superseded by the 1700 cc models. Why so late ?? I guess they had a stockpile of 1600 cc components that they where not willing to scrap.
So the whole layout is 1600 cc designed for optimum performance with 1600 cc, but adapted to 1700 cc stretching the limits. That said, it's not impossible to gain more power, but it involves way hotter cams, witch again reduce bottom end torque.
I have access to a flow bench, and i have flowed the original air intake, including filter, and it flows enough CFM to not restrict the engine. A another reason the stock air filter performs so well, is the intake under the seat, drawing cold air, where the BC filter draws hotter air bypassing from the engine ( airbox not blocking the flow anymore, through the frame, and aft ).
Also the whole exhaust system is at it's limit, for an N/A 1700, and I don't mean only the cat, but the whole system.
The only realistic way to increase power, without changing to much, is forced induction.
This makes a lot of sense. A flow bench, real physics not trial and error.
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| Never drink from a cow with one udder! 2010 1600 Blue&White ( of course ) Long TORS and HP filter.
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| | | Leethal | | Zeus | | | | Reg. Date | : | 24/01/2011 | | Posts | : | 6,407 | | Location | : | Australia |
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| | Posted : 30 Jul 2019 - 23:09 Post title : Re: Dirilling out the airbox on a Storm (Re: Slcharger) | | |
Slcharger wrote:
Leethal wrote:
Looking at my dyno results I would say each little modification gives 2 or 3 hp.
I can't believe that the intake system was designed (limited) to only cater for a stock 1600, it's exactly the same for the 1700, so for a start there is a bit of flexibility right there. It would be nice to test each mod on a dyno separately but unless you have a mate with one it would cost thousands.
I can afford the SC kit but I don't want to affect my reliability as I do some big rides and often solo, when it comes to a rebuild then I may play around with the head, camshafts and then maybe the intake., or as I said find a 1700 motor complete and play with that, but then the BMW 1800 might change all that. |
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Lee, I agree that a gain of 2-3 HP is realistic, but that is not what I consider " Worth the money ".
I still advocate for the theory that as they designed the engine of the Bird, the layout was for a 1600 cc engine, not a 1700. The fact that they had to add 12 kg to the rotating mass on the crankshaft, just to make the damn thing drive able, on the prototype, and later in the production version, made the bike so much "way off" performance wise, compared with the initial intentions, that they decided to make a 1700 BB kit, to regain and improve performance. Later in 2010 ( approx 1 year after the introduction, if I remember right ) the 1600 cc was superseded by the 1700 cc models. Why so late ?? I guess they had a stockpile of 1600 cc components that they where not willing to scrap.
So the whole layout is 1600 cc designed for optimum performance with 1600 cc, but adapted to 1700 cc stretching the limits. That said, it's not impossible to gain more power, but it involves way hotter cams, witch again reduce bottom end torque.
I have access to a flow bench, and i have flowed the original air intake, including filter, and it flows enough CFM to not restrict the engine. A another reason the stock air filter performs so well, is the intake under the seat, drawing cold air, where the BC filter draws hotter air bypassing from the engine ( airbox not blocking the flow anymore, through the frame, and aft ).
Also the whole exhaust system is at it's limit, for an N/A 1700, and I don't mean only the cat, but the whole system.
The only realistic way to increase power, without changing to much, is forced induction.
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Right, so the stock airbox may suit/serve exhaust mods on a 1600 more so than a 1700?
For me part of the attraction of pod filters was the appearance, gave that cool modified look, but as the Tbird's is hidden behind covers and the fact that it doesn't give a lot in hp makes the exercise a bit pointless. That is just me, I'm not knocking those that have done it, mods are a personal thing.
Maybe Jamie can tell us if he lost any torque with his cam modifications?
Kim what is your opinion on the seat ducting?
| Experience is something you get just after you needed it
1600,Foran Razorbacks, Meerkat bypass, Dyno tune, real headlight,plenty of chrome,switchblade pegs, Hagon Nitro shocks & Ikon progressive fork springs etc. Scorpion Western Low handlebars. PH adjustable fork caps.
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| | | AZCactus | | Taranis | | | | Reg. Date | : | 01/05/2013 | | Posts | : | 4,524 | | Location | : | AZ |
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| | Posted : 06 Aug 2019 - 13:13 Post title : Re: Dirilling out the airbox on a Storm | | |
AZCactus wrote:
...the guy in the Video commented "This is a very noticeable difference. You can also hear it. BC is spot on with the description: "Dollar for dollar, this is the best performance upgrade you can get for your Triumph Cruiser." I think you add about 13HP." Link
Of course that's his opinion but I like it |
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I like the BC Kit and would buy it again!
| 2009 Thunderbird 1700 Big Bore
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| | | AZCactus | | Taranis | | | | Reg. Date | : | 01/05/2013 | | Posts | : | 4,524 | | Location | : | AZ |
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| | Posted : 12 Aug 2019 - 14:34 Post title : Re: Dirilling out the airbox on a Storm (Re: Leethal) | | | As for air intake, I think the stock seat w/ducting and airbox is good (by design)...a few members removed the duct system and posted negligible performance gains. Anyway I now have the Mustang (solo) seat w/out duct, a more open area to enhance the bc kit imo.
| 2009 Thunderbird 1700 Big Bore
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