|  | Topic : Thunderbike Hi Flow Air Intake: An Aside |  |
| | | narsisco_lopez | | Thor |  |  | | Reg. Date | : | 09/09/2010 | | Posts | : | 2,765 | | Location | : | Golden (Showers!), Colorado, United States |
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| | Posted : 17 Dec 2010 - 21:26 Post title : Thunderbike Hi Flow Air Intake: An Aside | | | While shopping for various farkles, I came across this high-performance bellmouth/intake for the America/Speedmaster on British Customs...
 ( Link )
It made me think about the aggressive member response to kev062's (Kevin from Thunderbikes.com in New Zealand) post below... ( Link )
Seems to me that this design by Norman Hyde is very similar to Kevin's design and, at $149 US, not that much cheaper than what Thunderbikes is planning on charging for the same unit for the Thunderbird 1600.
Just saying....
| 2012 Storm (SOLD!)
Other Bikes:
2003 Suzuki DRZ400E (plated - my dual sport/mountain trail/camping bike)
Past Bikes:
2012 K13S
2009 KTM 990 Adventure
2010 Triumph Thunderbird 1600 (the Alien Queen)
2009 Triumph Sprint ST (another great bike!)
2007 Kawasaki ZX10R
2000 Kawasaki ZRX1100
1975 Honda SB550T "Clubman"
1981 Kawasaki KZ1000J
1985 Suzuki GS550E
1978 Yamaha 650 Special
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| | | DizzE | | Thor | |  | | Reg. Date | : | 12/07/2010 | | Posts | : | 3,141 | | Location | : | Sunnyvale, CA, United States |
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| | Posted : 17 Dec 2010 - 23:11 Post title : Re: Thunderbike Hi Flow Air Intake: An Aside (Re: narsisco_lopez) | | | You might be surprised after your dyno test. Especially if you take a look at results with and without any
doo-dad, Triumph or other.
Just saying...
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| | | narsisco_lopez | | Thor | | | | Reg. Date | : | 09/09/2010 | | Posts | : | 2,765 | | Location | : | Golden (Showers!), Colorado, United States |
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| | Posted : 18 Dec 2010 - 00:09 Post title : Re: Thunderbike Hi Flow Air Intake: An Aside (Re: DizzE) | | | Hey DizzE,
This aside was simply to point out that there's already a similar product at a similar price-point doing a similar function.
The test Kevin at Thunderbikes.com set up is simply to confirm, via a third party, the performance improvements his company claims.
Are you saying you'd anticipate a similar or better result, performance-wise, by running WITHOUT the stock intake/filter cover? Plese clarify so I know I'm not misunderstanding you.
If that's the case, maybe I can talk Erico into doing another dyno run with NO intake free of charge (gotta save my extra cash this month for Christmas presents for the wife, so she won't bug me about going on my 3 week ride this summer  ), If I can, I'll post those results in a separate thread.
| 2012 Storm (SOLD!)
Other Bikes:
2003 Suzuki DRZ400E (plated - my dual sport/mountain trail/camping bike)
Past Bikes:
2012 K13S
2009 KTM 990 Adventure
2010 Triumph Thunderbird 1600 (the Alien Queen)
2009 Triumph Sprint ST (another great bike!)
2007 Kawasaki ZX10R
2000 Kawasaki ZRX1100
1975 Honda SB550T "Clubman"
1981 Kawasaki KZ1000J
1985 Suzuki GS550E
1978 Yamaha 650 Special
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| | | daz | | Zeus | |  | | Reg. Date | : | 12/05/2009 | | Posts | : | 7,731 | | Location | : | United States |
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| | Posted : 18 Dec 2010 - 00:11 Post title : Re: Thunderbike Hi Flow Air Intake: An Aside (Re: narsisco_lopez) | | |
narsisco_lopez wrote:
While shopping for various farkles, I came across this high-performance bellmouth/intake for the America/Speedmaster on British Customs...
( Link )
It made me think about the aggressive member response to kev062's (Kevin from Thunderbikes.com in New Zealand) post below... ( Link )
Seems to me that this design by Norman Hyde is very similar to Kevin's design and, at $149 US, not that much cheaper than what Thunderbikes is planning on charging for the same unit for the Thunderbird 1600.
Just saying.... |
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yeah, but there are differences. Thunderbike is known for infiltratiing forums trying to sell thier stuff and making HP claims that never seem to pan out for those who buy them. They are agressive in thier claims and methods. I keep saying it but it bears repeating....they claimed 15 HP for the america speedmaster pipes with NO tuning at all. Thats a 15 RWHP increase on a engine that probably made 45-50. yet they never backed down from that claim. I just but a BB kit, thats pistons and cams in a Tbird and got 15 HP at the crank which is about 12 at the rear wheel. Think about it. If the thing gets 5 HP for you thats great. But thats not the point. That would simply be an exception. Let me ask you this.....if it gets 1 HP or even none, will you be all hot and ready to buy or recommend thier next product? And yeas, i did have those pipes i mentioned and not only did i not get 15 HP, i noticed zero difference in the pipes alone ! thats a long ways from 15 HP gains on a 50 HP engine. trust me, you'd feel that more than pamala anderson's hand on your.....well, you get the idea...
| 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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| | | DizzE | | Thor | | | | Reg. Date | : | 12/07/2010 | | Posts | : | 3,141 | | Location | : | Sunnyvale, CA, United States |
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| | Posted : 18 Dec 2010 - 02:09 Post title : Re: Thunderbike Hi Flow Air Intake: An Aside (Re: narsisco_lopez) | | | narsi, my bird friend, I have indeed suggested this test in the other thread.
I'll tell you my candid view. This bike has a tuned resonance airbox/intake plenum. I've done a lot of
research on this as I've posted. I've modeled it in a fluid dynamic simulator used in auto racing and
my model conforms to published specs. When I change the model it predicts an outcome,
I can mod the bike, take it to a dyno and get the simulator result predicted. Also posted in other threads.
Everything I see, being an internet speed reader with too much time on my hands, points to one
conclusion.
If you want low rev torque you channel the airflow to speed it up, in general.
If you want high rev horsepower, you open it up. I posted a bunch of sim results.
A tuned resonance airbox is essential in this config for low torque. It's about capturing these
speed of sound pressure waves to aid in the cylinder filling in the low rev range.
So, the Triumph lip shape is designed, presumable, to speed up the airflow by restriction in conjunction
with the twin cylinder pressure sharing resonance in the airbox. Increase the torque peak at 2700 rpm.
----------------------So what?
IMO, those that open their airbox intake, which I have modeled, can see as much as 6 hp at 4500 (running with
lip and seat off) Or maybe +2 hp running with the intake part off all together and/or the seat cut apart.
You won't be able to feel the gain at 4500, BUT, you may feel the loss of low end torque.
So, will the $200 thing or the $150 thing produce the same result as no thing? Lot's of claims out there.
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