tg580

Just got it dyno tuned yesterday. 398rwhp, 380ft/lbs. I'm at a little disadvantage because its a convertible so I have a little extra weight. High 11's was my goal. All the horsepower to 1/4 mile calculaters I've found on the web tell me 12.1 to 12.2. They don't take into account tires, gears and stall though. What do you guys think?

LS1 bird

I would say that's pretty close.Prob 12.0 My full bolt on full exhaust 02 formula wit fti 3600 and a trans go shift kit and stock gears went 12.3 at 109mph without even launching the car hard and on bald mickeys.Good luck and let us know.

thunderstruck507

iTrader: (18)

What are you using to guess the weight? I think with good air and a good 60ft you will barely make it in.

SREETRACEGUY

iTrader: (13)

you can hit 11s if all the little stuff is right good luck

SREETRACEGUY

iTrader: (13)

i went 11.2s on 425rwhp

Detroitmuscle

iTrader: (16)

you should see 11s no problem.

1989GTA

My 3rd gen had 370rwhp and ran a 12.09/113.11 with 3200+ density altitude. With better air it would have been in the 11's. Race weight 3680 pounds. This car has a 4L60E with a Yank torque converter. So yes you should be able to get a high 11.

thunderstruck507

iTrader: (18)

fwiw I too am hoping for high 11 worthy passes, mine weighs around 3700 race weight but only dynoed 345rwhp unlocked through the mufflers...hoping I have enough but skeptical

tg580

Well, I finally got to take it out on the street and I am very happy. It will light up my MT 305/35's drag radials with no problem. Even from a dig. I'm going to have to drop the air pressure some more I'm at 24.5 psi right now. Think I'm going to try 16 psi. It rev's very fast. I'm betting 11.8's. Can't take it to the track though because I don't have a roll bar. I'm going to use my buddies gtech.

odarabla

iTrader: (1)

You don't need a roll bar to run high 11's man. Take it to the track and she what she can do. The only thing they can do is kick you off if you run faster than a 11.499 or 120mph for not having a roll bar. **** man the track we have around here I run in the 10's with no roll bar and half the time they just tell me to keep my mph down. LOL That's why I still run in the street class instead of superpro non eletronics class.

oh and you should be in the mid to high 11's no problem man..

tg580

The local dragway where I'm at says if you have a convertible and run in the 13's (it might be twelves) that you have to have a roll bar. I just dont think that I am ever going to want a roll bar in my car. I think it might look like **** with the top down.

LS1 bird

Im 3600 race weight with 351hp at wheels 12.3

LS1 bird

If I were u i would at least make one pass.All they can do is tell u are done 4 the night.Maybe u see that 11sec pass the first time who knows.

Damian

iTrader: (89)

With a stalled auto/3:73 gears and 398rwhp, 11's isn't totally out of the question. I'm going to guess 12.30's though, due to the extra weight.

A lot of people forgot how important power to weight ratio is.

MikeG

iTrader: (33)

I agree with everyone who says go and make one run and give it a shot. Take some weight out, do everything you can to make sure that one run is going to be a good one!

big dave

My guess is 11.6 with good traction. Autos are not dyno friendly but your numbers are very good nontheless. Of course track conditions, elevation, and weather have to be taken into account

SAPS

I was wondering why my car would do for a while and finally went to the track to find out. It was my first time ever at a racetrack and it was like being a kid again. Go out and have some fun and in the process you'll prob meet some good people along the way.

I don't know why, but getting a street car aka "grocery getter" into the 11's is just plain cool. When I got my 11sec timeslip it was a rush! Can't wait to go back and rerun with the shift points setup right. I'm hoping for 11.5's.

thunderstruck507

iTrader: (18)

What DA? 351hp locked or unlocked converter?

My 1/8th mile times were already estimating me in the mid 12 sec 1/4 range. I've since added a UDP and dyno tune and I know I will need good air

LS1 bird

I live in south florida.My converter is a lock unlock and i really never lauched the car.I was afraid 2 break the rear end.Just took my foot off the brake and mashed the gas.But it was like 80 degree's and 1000% humidity. pulling a 1.7 60ft and 12.3 at 109mph

Detroitmuscle

iTrader: (16)

Don't go to Lapeer if thats what your thinking that place is a shithole and you wouln't run 11s there as the prep is non exsistant. Get to a nice track and they should be fine with you running that fast. If they ask you to slow down you can do 1/8 mile for a few passes and get that 60' just right, then make a full 1/4 pass and leave and you'll be fine and going home with an 11 second slip