Improving 60ft times on my 92GT, please help!

1992 5.Slow GT · Dec 28, 2022

So the entire time I've owned my GT I've been stuck at 2.0X 60ft's, being able to get a few 1.9X's. My first attempt to remedy this was 255mm Toyo R888's, I still spun with just 260~ hp. Thought new shocks would help, put strange 10 way adjustables on it and the reccomended drag settings, still spinning. Still trying to chase down this issue, looking at springs and rear control arms. It is a 5 speed car with a stage 1 exedy clutch and still has the stock 3.08 gears. (the posi works it has fresh clutch packs)

1992 5.Slow GT · Dec 28, 2022

Trogdor · Dec 29, 2022

Try some actual drag radials, drop the pressure and warm them up, don't smoke them.

1992 5.Slow GT · Dec 29, 2022

Trogdor said:
Try some actual drag radials, drop the pressure and warm them up, don't smoke them.

I have thought about that but alot of people on the forums consider the NT555r's and the R888's pretty similar, but the r888 has way better rain performance and lateral grip for daily driving. Have considered the M/T et street radials but they don't make them in the right size

KRUISR · Dec 29, 2022

What is your rear control arm set up?

1992 5.Slow GT · Dec 29, 2022

KRUISR said:
What is your rear control arm set up?

Bone stock, looking at getting UPR or BBK uppers and lowers this summer

JD1964 · Dec 29, 2022

The pinion angle can be changed so that when you load the rear end with tq, it gets pushed downward increasing the weight on the tires to the pavement. There is a vid on YouTube about it. Maybe I can find it

1992 5.Slow GT · Dec 29, 2022

John Dirks Jr said:
The pinion angle can be changed so that when you load the rear end with tq, it gets pushed downward increasing the weight on the tires to the pavement. There is a vid on YouTube about it. Maybe I can find it

I just watched a video yesterday that mentioned it, heard that team Z makes a upper control arm relocator kit or should I just go with adjustable control arms?

JD1964 · Dec 29, 2022

It's actully about the angle of the upper control arms, not so much the pinion angle. I think this vid explains it pretty good

View: https://youtu.be/VkrVi7EQ4iI

1992 5.Slow GT · Dec 29, 2022

John Dirks Jr said:
It's actully about the angle of the upper control arms, not so much the pinion angle. I think this vid explains it pretty good

View: https://youtu.be/VkrVi7EQ4iI

Yup that's the one I watched, my car is likely never gonna go on slicks so I think I'm just gonna grab the cheap pair of non-adjustable UPR control arms and see how they do. Is there anything worth doing with the front suspension or will the strange shocks I have do fine? I have videos of the launch and the front lifts really nice but the rear seems to either not move or have very minimal squat.

nickyb · Dec 29, 2022

I would go team Z for better 60ft., If it's too much to spend now then better upper and lower rear control arms with an airbag inside passenger spring.

90sickfox · Dec 30, 2022

What tire pressure do you run at the track ?

1992 5.Slow GT · Dec 30, 2022

90sickfox said:
What tire pressure do you run at the track ?

Earlier this year in June when I ran it I think I took them to 20 at first, then took them down to 16 or 18 after that. Didn't really see much improvement. To launch the car I slip the clutch to get it to roll out and to keep the rpm up. After the car is rolling I try to get off the clutch as fast as possible to keep from burning it. The car spins when I am at like 1/2 way to the 60 ft bulb trying to get out of the clutch. I can't think of a better way to launch the car. I've tried getting out of the clutch sooner it either bogs down to 3000rpm or spins. My thought is too much wheelspeed from the 3.08 gear

JD1964 · Dec 30, 2022

For those with more experience than me on this topic, I have a question. The OP has 3.08 rear gears. Even if he gets the tires to hook, how good of a 60' can he expect?

JD1964 · Dec 30, 2022

1992 5.Slow GT said:
Earlier this year in June when I ran it I think I took them to 20 at first, then took them down to 16 or 18 after that. Didn't really see much improvement. To launch the car I slip the clutch to get it to roll out and to keep the rpm up. After the car is rolling I try to get off the clutch as fast as possible to keep from burning it. The car spins when I am at like 1/2 way to the 60 ft bulb trying to get out of the clutch. I can't think of a better way to launch the car. I've tried getting out of the clutch sooner it either bogs down to 3000rpm or spins. My thought is too much wheelspeed from the 3.08 gear

With only 260 hp and 3.08 gears, you might be expecting too much. When you say it bogs down to 3000 rpm, I'm wondering what rpm you are trying to launch at? 3000 is not necessarily a "bogged down" rpm for an engine making 260hp. I think you might be over revving on the clutch dump for your particular combo. BTW, in my opinion you shouldn't be "slipping" the clutch out like you mention.

1992 5.Slow GT · Dec 30, 2022

John Dirks Jr said:
With only 260 hp and 3.08 gears, you might be expecting too much. When you say it bogs down to 3000 rpm, I'm wondering what rpm you are trying to launch at? 3000 is not necessarily a "bogged down" rpm for an engine making 260hp. I think you might be over revving on the clutch dump for your particular combo. BTW, in my opinion you shouldn't be "slipping" the clutch out like you mention.

So just to put this out there I'm only 20 and I've been away from the car for most of the last 2 years because I'm in the military. Got the car when I was 16 and have just been trying to get it in the 13's since then so I've just been trying to drive it the fastest way I know how, I am not gonna act like I'm a great driver. I had been doing this type of launch for a while on the stock clutch and when I replaced it, there was no noticable damage so in my mind I figured I wasn't gonna hurt the car doing it. And I guess when I say "bogged" i just mean the car was lower than I wanted it to be in the rev range. Kind of a stupid way for me to put it I guess so I apologize

JD1964 · Dec 30, 2022

Thanks for serving our country and there's no need to apologize for anything. As I said, other people on here with more experience than me at racing these cars will have more insight than me. Believe me, my 92 also has a traction problem that I hope to improve.

By questioning what you have been saying, I'm trying to clarify what's happening and that will help you get some good answers.

Monkeybutt2000 · Dec 30, 2022

It's much easier to launch the car with a lower (3.55 or more) gear. The fastest I ever went on Drag radials and a 3.73 was 13.56, on a bone stock engine.

1992 5.Slow GT · Dec 30, 2022

Monkeybutt2000 said:
It's much easier to launch the car with a lower (3.55 or more) gear. The fastest I ever went on Drag radials and a 3.73 was 13.56, on a bone stock engine.

I've thought about getting 3.55's for it but my mechanical skill and lack of tool collection have prevented me from doing the job. I'm only home for 1 month out of the year so I currently don't have the means to do it. May look at having a shop do it. I plan to get them done in the future but just looking if there is anything at the moment that can help

Sparky714 · Dec 31, 2022

I couldn't get mine to hook with drag radials at the track no matter what I did. I have 3.73 gears, UPR adjustable upper and Maximum Motorsport lowers, stock springs and Strange 10 way adjustable shocks. I went to Mickey Thompson ET Street bias plys and finally was able to get it to hook. I do have a bit more power than you with a Vortech supercharger, but I was able to go from low 8's to mid 7's in the 1/8th by switching to bias ply tires. I'm far from an expert drag racer. I'm just an old guy that likes to mess around at test and tunes a few times a year to see if I can get a little faster. I do think you're going to need a gear change and control arm upgrade to see any real gains though.

Improving 60ft times on my 92GT, please help!

1992 5.Slow GT

1992 5.Slow GT

Trogdor

1992 5.Slow GT

KRUISR

1992 5.Slow GT

JD1964

there is enough sticking out to grab on to

1992 5.Slow GT

JD1964

there is enough sticking out to grab on to

1992 5.Slow GT

nickyb

I gotta say i never painted my nuts, Never Ever

90sickfox

Wasn't a pretty sight...and I've got big hands

1992 5.Slow GT

JD1964

there is enough sticking out to grab on to

JD1964

there is enough sticking out to grab on to

1992 5.Slow GT

JD1964

there is enough sticking out to grab on to

Monkeybutt2000

Mustang Master

1992 5.Slow GT

Sparky714

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I gotta say i never painted my nuts, Never Ever

Wasn't a pretty sight...and I've got big hands

there is enough sticking out to grab on to

there is enough sticking out to grab on to

there is enough sticking out to grab on to

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