Suspension, Tires, or both?

[Magnimike1]

My .02
Try with newer rubber first at a prepped track with 13-15lbs (air)
then decide if your suspension needs tuning,
might need slight pinion angle adjustment. G/L

and put the 5 lb. springs back in until you get the suspension/tires tweaked I would start with more like 18lbs. in the tires

[FRANCISCO308]

Change the tires, I never had luck hooking on ET streets

[Grape]

New tires hide chassis problems

[dville_gt]

New tires hide chassis problems

You never answered my question!

[turbostang]

New tires hide chassis problems

You can't tune a car with old tires, nor can you tune one that's all over the place.


My guess is there's more than one problem.

1) the tires
2) too little air
3) Not leaving with enough RPM or boost

If the car leaves with too little boost it will skate when the boost hits and will never calm down because the car is "not back on the tires". Once you get in that situation, there's no recovering - thats why you see a lot of big power cars blow the tires off at 300'.... too little too late.

Your iterim fix would have been more air - it would have helped the skating, or 'driving inside the tires' (where the car moves inside the tires but it still going in a straight line for the most part)

The radials will stop a LOT of that problem, but still.. needs more power on the launch.

[dville_gt]

Your iterim fix would have been more air - it would have helped the skating, or 'driving inside the tires' (where the car moves inside the tires but it still going in a straight line for the most part)

I could not explain this better for the life of me, this is EXACTLY what I am experiencing.

[turbostang]

I could not explain this better for the life of me, this is EXACTLY what I am experiencing.

That's most likely underinflated tires...

but.. if it's spinning with more air, it's old tires or possibly suspension setup.

[dville_gt]

That's most likely underinflated tires...

but.. if it's spinning with more air, it's old tires or possibly suspension setup.

How do you set your anti-roll bar? I went through the steps that came with it (jacking up the front by the k-member, etc.) but then I pulled the driver link to drive around on the street. When I got to the track I had to loosen the link to make it fit back in, so at that point I figured I probably threw off the other side so I tried to readjust it with the car flat, I left the driver side with just a little slack and went a 1/4 turn on the passenger side. Seemed to launch straight but like you described I was driving inside the tires for sure.

[Outlaw88]

I tested my car and we could not get it to hook at all, put new drag radials on it 5.4's at 143 first pass with low boost so was very happy. Time to pour on the power now!! Could not believe the difference tires made!!

That's most likely underinflated tires...

but.. if it's spinning with more air, it's old tires or possibly suspension setup.

[slownbmta]

What did you run?

[Grape]

How do you set your anti-roll bar? I went through the steps that came with it (jacking up the front by the k-member, etc.) but then I pulled the driver link to drive around on the street. When I got to the track I had to loosen the link to make it fit back in, so at that point I figured I probably threw off the other side so I tried to readjust it with the car flat, I left the driver side with just a little slack and went a 1/4 turn on the passenger side. Seemed to launch straight but like you described I was driving inside the tires for sure.

red fucking flag......bring the car over and we will put it on my scales and show you what that bar being bound up will cause.

[turbostang]

red fucking flag......bring the car over and we will put it on my scales and show you what that bar being bound up will cause.

There's a certain amount of preload that has to be done with the links connected, you know that..

With this preload, it stands to reason that you will have some difficulty reconnecting the bars.

(not saying what he's experiencing is right or wrong, just saying)

Sway bars are touchy, and a half turn is a pretty healthy adjustment.

[Grape]

There's a certain amount of preload that has to be done with the links connected, you know that..
.

this should be neutral with driver in the seat, his problem i'm assuming was from getting out of the car, (left side coming up) and the link became tight. All it takes is setting the bar neutral, get out, find out how many rounds it takes to free up the bolt to remove it as a baseline. Tricky part is the surface the car is sitting on and air pressure will make a huge difference in this.

i just think the car needs to go on scales since it has coilovers and we know we can hang cars on two corners with the ride heights being correct yet one wheel will weigh 200 less than another.

[dville_gt]

What did you run?

terrible, per my log i was ~80% throttle with burst of wot throttle throughout. even if i could have hung in there i was only making 5psi w/10* of advance, still went faster then it ever did n/a, but waaaayyyy off where it should/will be.

[turbostang]

terrible, per my log i was ~80% throttle with burst of wot throttle throughout. even if i could have hung in there i was only making 5psi w/10* of advance, still went faster then it ever did n/a, but waaaayyyy off where it should/will be.

Man, that's as bad as leaning it out. There's no way I would be running timing that low... but that's just me.