How much horse do u actually lose threw the drivtrain. I'm suppose to be makin 600hp to the crank so what you guys think i'll be makin at the wheels. 383 Eagle compettion Rotating asembley mahle pistons AI 215cc trickflow heads custom AI Cam 569" 568" lift Procharged 15 lbs boost running to stock 10 bolt lol i hope it holds at least till i can afford a 9in. Thanks

 

An average "rule of thumb" is in the range of 15%. There's obviously a plus/minus factor, but it will get you in the ballpark.
600 crank h.p., minus a 15% loss = 510 h.p. +/- at the rear wheels.

 

well we got it on the dyno and it was makin 550crank at 3500rpm but then fuel started getting really lean so i guess im goin have to get rid of the ****ty walbro 255 and get a better one all said and done i'm preety sure i should get up to 600 at crank if not more thanks for the info

 

I think you're definitely going to go beyond 600. Peak h.p. on that engine should fall in the 5,000 rpm or above range.
And all with a stock 10-bolt? Who's going to be the lucky one to stand behind the car with a big catchers mitt to grab the parts as they fly out?

 

Haha funny. I just Spent all my money on the parts. So i have to save up for a ford 9 in i dont even know how much they cost. But yea i peak at 5800rpm. But i was only makin 8lbs boost with the smaller pulley. i was makin 8 with the stock pulley guess that was a waste of money. But its probally because of the new heads because they have WAYYY much more flow then the stock ones did. But i think my 10 bolt will hold up as lons as i dont rip threw the gears all the time and dont leave hard. I hate it because i wana put my hoosiers on and go see what this thing will do. i ran a 11.90 b4 all mods i jus did. (stroker kit and heads cam package) Cant wait to see what i can do now. And i just found out i need a better fuel pump then what i have.

 

yes 69 hit the nail, 15% drive train loss is about right

 

what engine is this?

a 5800 shift point on a built motor seems low to me...i shift my stock (for the most part) car at 6100...if it was a fully built motor like i plan...i'll be shifting at around 6700

that's an LT1

 

with the AI 215cc heads im assuming its an lt1. pretty nice set up any picks? and i believe its said to be 15% lose with a A4 and 13% lose with a m6.

 

So that means an LS1 approx has 350 to the crank, 350 -13% loss is 304.5 horsepower to the wheels. So we lose 45.5 on a M6 LS1 and 52.5 on an A4.

And a LT1 M6 is 300 - 13% makes 261 to the wheels? Wow.. that parasitic loss isn't really parasitic loss.. it's like dragging a boat anchor.

 

Pockets47 is saying his engine is reaching maximum h.p. at 5800 rpm. Above that, h.p. starts to drop. It has nothing to do with the maximum rpm (redline) capabilities of the engine.