vinnydahitman

since im stupid about cars :P and dont know of a way to check hp at the crank... i have some questions. unless im wrong and there is a way to determine this.

acura says our cars produce 260hp at the crank

comptech shows a 32 hp gain for headers on their dyno, aem shows 12 for their cai, comptech exhause 3 hp... etc. etc. etc. but this is all WHP.

how much do you think each of the major mods, IHE, would produce at the crank?

something to get your brains working this morning

Nashua_Night_Hawk

You have to care about the Dyno numbers not the crank HP...to impress someone dudes... just say... "Yeah, I have some 318 HP under the hood.."

vinnydahitman

i do realize that hp at the wheels is what counts. im just boored and thought id get some people thinking.

Nashua_Night_Hawk

divide you dyno numbers by 0.77

ferizzo

Nashua is a wicked smatt kid! Sorry, just working on my New England accent a little.

CO-CL-S

Ya gotta roll your rrrrrr's.. Try putting a few marbles in your mouth.

Shawn S

That can’t be right because it doesn’t compensate for the difference in drive train loss between the 6-Speed and the Auto.

My latest DYNO run showed 240 so I figure with a 15-20 percent Tranny loss I’m looking at 290 to 300 “under the hood”.

Shawn S

ferizzo

Shawn,

I think you should be dividing your 240 by .8-.85 because you have less drivetrain loss. Nashua was being specifc to autos I assume (~23% loss) vs your 6-speed's 15-20% loss.

When you divide 240 by .85 (15% loss) you get 282 hp at the crank and 300hp if you divide by .8 (20% loss). My guess with your performance mods that your are probably getting 20% loss of power (considering you dynoed with your chrome 18s). 300hp at the crank sounds right for headers and intake.

A stock auto CLS/TLS usually dynos on average 200 hp which equates to a 23% loss at the wheels from 260 at the crank.