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Originally Posted by SilverSnake
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That is correct...it's why I said:
Granted on a stockish motor you probably can't tell, but this specific high power n/a motor could definitely tell the difference.
What that tells me is that the Belanger won't flow as well when
enough air is put into the header. On this application the HMS header was even until 4700 and then really started to flow. If you did that test on a stockish motor you may not see any difference. Same with exhaust....a 2" exhaust will make as much power as a 4" up until some
point. If this test were done on say a Roe car, a nitrous car, Paxton car where would the difference start ? My car makes more wtq than that dyno shows peak tq and it makes it at less than 3000rpm. That is why I would prefer a better flowing header.
Your statement that the tri-y is not designed to make hp up top could also be said: It will not flow as much air and at some point is more restrictive.
Now, on the lower end of that graph it may well be the Belanger that is making more power. That fits into the theory that smaller, more restrictive pipes will make more bottom end power.
Why do people remove the pickle ? Some say it restricts a higher power car.
A note on this test.
1. Done by Lingenfelter....one of the best in the biz.
2. This car gets the best pieces to make power no mater the expense.