If a 100 hp engine loses 15hp(15%) from the flywheel to the drivewheels. Will it still be a 15%(30hp) loss if the engine was pumping out 200 horses going through the same tranny????
So, will it be 185 hp or 170 hp at the wheels for a 200 hp engine??

thx

 

that's about right. I am sure engineers have a more complicated/accurate formula, but typical losses for a manul tranny are around 15%, automatics beinging slightly higher. Needless to say, if you're dealing with a car making 300 horsepower or more, it is a significant loss...

Scott

 

dynojet or someone actually had a conversion formula based on the type of tranny you have.. I cant find it but I am still searching..

 

I dynoed 248 stock, with a 94' vette 6 spd. All corvettes are dynoed before they leave the factory and are held back if they fail, for 94' they should all be 300 at the motor. So a simple calculation 248/300 = .826 or approximately a 17% loss due to the drive train. I think a 2% margin of error is reasonable, due to variances in the dyno equipment etc. Which would show a min of 15% loss and a high of 19% loss. I like the 17% myself

Conversely, if my 99 SS dynoes 325rwhp then it has 380 at the motor

 

I think we need to get you on a dyno soon to see what we are looking at before we start !! heheh

Come on, you know you want to see it on the dyno... DO IT! DO IT! DO IT!

Then agian, looking at your sig.. YOU NEED TO DYNO AND VISIT A TRACK! MAKE A PILGRIMAGE IF NEEDED!

 

PC, I agree I need to dyno, I'm just waiting to do a new mod and then I'm going to go. I think next up is the LS6 intake.

 

So, lets say your Vette pumps out 600, everything being the same. Assume the tranny and all can take the power. Will you have 496hp at the wheels?? or will it still lose 52 hp, which would be 548 hp at the wheels?? It should be 496 right?? I mean, it's a % loss, not a number loss, so the more power you make the more it loses. In this case, ~17%, always......

 

Yes, 496 would be the number it is a percentage of the total power. If you only had 100 hp at the motor you would have 83 hp at the wheels. You lose approximately 17hp per 100.

Clear.....?

 

I just got this from Dynojet:
Doesnt that bite? hehe In any case it is good to just get an idea of the power and not an exact representation.

 

Read up:

http://www.ls1.com/forums/showthread...hreadid=151557

 

Can someone post? can't access at work.

 

I would, but its 5 pages... not too bad info but I would argue it..

essentially at the part i have gotten to, they are saying that the drivetrain loss is at 12% now because cars more more efficient..

then they are argueing the difference of the mustang and dynojet numbers..


can you cut and paste to get to ls1.com?

 

Yes it is very long...but a good read.

 

Thank you thank you