quickest route to 400rwhp?
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Teching In
Joined: Aug 2013
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From: central california
quickest route to 400rwhp? Alright so ive got a 2001 c5 corvette coupe, ls1 6 speed manual. Currently the car is mostly stock with cold air intake and bullet muffler axle back exhaust. Im looking for the most cost effective and reliable route to 400whp. I have lots of experience with cars and their mechanics in general but little experience with performance mods. Ive been looking into possibly camming it and im open to possible intake or exhaust mods as well as a professional tuning, id like to keep my stock heads. I race autocross on weekends so Im hoping to maintain good street driveability while meeting CA smog, and bumping up to the neighborhood of 400whp with a good torque curve for the track. thanks for any input!
Why are you stuck on the stock heads? Ported with matching cam and exhaust will get you near your goal. Stock heads can do it but are pushed. If you want to stay with stock STYLE heads, the Z06/243 heads are an improvement in stock form. Still doable though.
Alright so ive got a 2001 c5 corvette coupe, ls1 6 speed manual. Currently the car is mostly stock with cold air intake and bullet muffler axle back exhaust. Im looking for the most cost effective and reliable route to 400whp. I have lots of experience with cars and their mechanics in general but little experience with performance mods. Ive been looking into possibly camming it and im open to possible intake or exhaust mods as well as a professional tuning, id like to keep my stock heads. I race autocross on weekends so Im hoping to maintain good street driveability while meeting CA smog, and bumping up to the neighborhood of 400whp with a good torque curve for the track. thanks for any input!
https://ls1tech.com/forums/generatio...s-results.html
Smog legal thread. Change gears, lighter parts in engine tranny, you can be very much quicker.
Smog legal thread. Change gears, lighter parts in engine tranny, you can be very much quicker.
I doubt you'll want to be swapping your exhaust every 2yrs so here's what I'd recommend:. For your heads send them off to AI and have them fully cnc ported and milled down to a 61- 62cc chamber size. Having you stock heads cnc port and milled for a higher SCR will allow you run a little less I/E split with the improved flow, and make noticeably more power, all while passing the visual aspect of a smog check.
FYI, I would factor in, (regardless of the actual cam spec you go with) keeping the overlap in the -6* to -8* range so you can pass smog, and sticking with a 8* to 12* I/E duration split to help offset the more restrictive exhaust. I'd also try to run minimal(+2) to no advance(+0, preferred) and keep the IVC in the 41* to 42* range.
Here's what I d try to run or very close to it: 217/225 114lsa+0, IVC is 42.5*, overlap is -7* . I can't guarantee you hit 400rwhp, but you shouldn't be far off if you don't.
FYI, I would factor in, (regardless of the actual cam spec you go with) keeping the overlap in the -6* to -8* range so you can pass smog, and sticking with a 8* to 12* I/E duration split to help offset the more restrictive exhaust. I'd also try to run minimal(+2) to no advance(+0, preferred) and keep the IVC in the 41* to 42* range.
Here's what I d try to run or very close to it: 217/225 114lsa+0, IVC is 42.5*, overlap is -7* . I can't guarantee you hit 400rwhp, but you shouldn't be far off if you don't.
Last edited by 99Bluz28; Aug 27, 2014 at 11:48 AM.
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Smog legal thread. Change gears, lighter parts in engine tranny, you can be very much quicker.
Smog legal thread. Change gears, lighter parts in engine tranny, you can be very much quicker.
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Teching In
Joined: Feb 2013
Posts: 13
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This guy installed stock c6zr1 headers and h-pipe that should help
http://forums.corvetteforum.com/c5-g...sion-pics.html
http://forums.corvetteforum.com/c5-g...sion-pics.html
That would be a great choice, but he needs it to pass smog. He needs a cam with at least -4* or greater overlap, and it needs to be a traditional split pattern cam to offset the more restrictive exhaust used to pass smog.
