I have an m6, hardtop, no options z28 (so its as light as they come) and my ultimate goal is is to trap 120mph in the quarter mile. Et's are not as important to me as most of my encounters w/ cobra's, vettes, etc are from a decent roll. Within a couple months Ill have all the bolt-ons and be ready to make a heads/cam purchase in the spring. If you are tapping 120 in an m6 f-bod let me know what it took! Thanks.

-Jason

 

400rwhp.

 

Atleast 400 RWP, maybe more, every car is different , depends on the weight too.

 

To hang with a Cobra? My best friend has an 03 cobra with 465rwhp & 496rwtq, he traps 117 in the 1/4.

 

I had close to 600 rwhp with 3950 race weight and trapped 123 @ a 2300 elevation track. If you have a ligh car, and or good track you can get there with lot less power.

 

What kind of car with that race weight? that is a high elevation too.

 

nawz yo

 

520hp and trapped 122

 

best trap to date is 120.5. dyno'd 391 rwhp, but car is only 3150 pounds.

 

~3700lb raceweight, 300' altitude, 432rwhp(~stock ls1 on the bottle) 11.7@120. 320rwhp on motor same weight trapped 109. Id say a 3500lb raceweight (easily attainable) close to sea level DA, 400 at the tire would do it.

Rule of thumb I use (not entirely accurate, but if your around 3500lbs/300-400hp its close) is 100lbs = 10hp = 1mph/.1et. Just what I've seen with these cars at the track.

 

I trapped 116 with my car with stock ls1 heads and ls1 intake. I swithched to stock ls6 heads and intake so hope fully I'll be closer.

 

420hp trapped 116 and 119. alot of things to consider. i switched from 3.42 to 4.10s.

 

It's a formula with everything but ac, iron block, and a stereo system. No real weight reduction done yet. That was a 422ci with a 100 shot on a 4L60e and 3.73 gears.

 

My last dyno was 469/421 in the WS6, I just trapped 122 last Wed. 3600+RW

 

500+rwhp..


ohh wait, nevermind. you dont have a 6000lb barn door youre trying to push at 120mph...

 

i trap 124mph 1/4 m6 w/434hp(stang dyno)

 

A good rule of thumb for trapping 120mph, is a 7.5lb / 1rwhp weight to wheel horsepower ratio. Of course gearing helps this along, but like others have said, if you're right at 3500lbs, 420-430rwhp should do the trick.