Quote Originally Posted by Curmudgeon
Actually, while the 15-20% that everyone throws around as a loss/gain is rule of thumb, the rule is inaccurate at best.

Example, my last 346" driven M6 went 460rwhp/424rwtq. Let's use 20% as the loss(rwhp x 1.20(20%)= 552 FWHP)through a heavy ass driveline.... steel DS, 12 bolt/4.56's, and 28" slicks.

Swapped in a braked stalled lock up TH400 and went 440/400 which shows a loss of an additional 20 rwhp.

New motor w/the same TH400 went 540/500(648 FWHP, again using 20%)through the same driveline. So.... if I swapped the same M6/clutch & flywheel back in it would go 81+ rwhp more? The math says not.

Driveline loss is drive line loss, and is what it is. It doesn't increase exponentially with power increase. That would be like saying it would take 300 FWHP in a 2000 FWHP motor to turn the same driveline I'm turning with 108 total FWHP in a 648 FWHP motor

I could understand and agree that when going to an unefficiantly built trans/converter combo, or even add in gearing/tire combo's the loss would increase(or decrease), but I don't buy the 15-20% across the board blanket statement for every application.

I HAVE done the math.

Back to Chris being full of shit......

He is not.

Have a nice day

Ok you Quoted what I had to say.... .. Did you not Notice that it says it depends on the Tranny.... .. Your right its not they same for ever car or setup...

My Example: We put a th400 in a 2v KB car that made 800/800 threw a 5spd... It now makes 642/654...... Thats almost a 20% loss ...
I could go on and on about this But I'm done...Its Pointless !! .. I'll let you Cheby guys claim your fame over here on IA... But just be sure you don't post your Bullshit on Ls1 Tech or StreetCarForums... If you did, You'd be called out on what you think you know... I already see this Mr Hunter don't have a Clue, He lets his Buddys do all the Tech talk for him... ...