12-02-2010, 12:58 PM
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CC Member
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Join Date: Aug 2009
Location: Edinburg,
TX
Cobra Make, Engine: Everett Morrison, All aluminum small block ford.
Posts: 436
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Not Ranked
Quote:
Originally Posted by blykins
Yes, you're correct....
If you start at 500 fwhp and lose 20%, you've lost 100 and you're down to 400.
If you start with 700 and lose 20%, you've lost 140 and you're down to 560.
And I believe that if a certain size exhaust system is restrictive to a 500hp 400ci engine, it's going to be even more restrictive to a 700hp 500ci engine.
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In my mind you cant do the math correctly based on percentages. If you have a motor that builds 500 hp and you put it on a chassis dyno and say that it looses 100 hp through the drivetrain. Now if you swap motors to more hp then the drivetrain still only takes 100 hp to turn. It doesnt take more hp to turn with a bigger motor...the tranny and dif dont know the difference.
So with the 500 hp motor you lost 20% or 100 hp. With the 700 hp motor you lost 14.3% or a 100 hp....again the drivetrain doesnt know the difference. It takes X amount of force to turn X amount of weight...right?
Now if you go trying to make that 700hp motor breathe through them 500hp headers and pipes....then the drivetrain is no longer a consideration.
Im confused....lol
Gene
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" If it wont break em loose in 3rd gear, it aint enough power "
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