Did'ja try to loosen the front end some?

 

Power management....

But the usual things,, Loosen front end, More front end travel, loosen extension on rear shocks, raise ride height of vehicle, lower tire pressure, lower rpm on launch, pull some timing,

 

I race on a poorly prepped track every week, and it's an advantage to having a car that will hook anywhere! I run some ballast in the rear so I am close to 50/50 weight distribution. Front suspension is loose with lots of travel. Rear is ladder bar with no adjustments, but the ride height is set so low that the bars have a significant downward angle. Ancient Koni internal-single-adjustable shocks, can't even recall the setting on them but I played with them years ago to get the best traction. Car runs 1.28 on a good track, 1.30 on the crappy one.

 

Kinda curious on this question myself, same type troubles, was wonderin if anyone adds preload to there rear coil over springs and if this helps

 

All of the above. Rule of thumb, when the track goes away soften the car up. When it gets better tighten it up.

 

is this true on a radial too or just a slick?

 

Then adding some preload to the rear springs would help?

 

Think about it....how exactly do you do that????

 

A 12" spring should be 8-1/2" to 9" at ride height and a 14" should be 10" to 10-1/2". If they are at that measurement then you have the correct spring.

 

I have a little bit of spring preload and a little bit of ladder bar preload in my car. IIRC the ladder bar preload is about 1/2" measured at the front rod end (if I pull the left ladder bar bolt on level ground with driver's weight in the seat, the front drops about 1/2"). I also adjusted up the right rear coilover slightly (maybe 1/4" higher than the left). It goes straight whether I launch on the trans brake with a big wheelstand, or footbrake it and carry the fronts out like a Pro-stocker.

 

Generally changing the height of the rear spring seats with ladder bars does not do much since the rear end moves like a swing arm.

 

lower the launch RPM, and loosen the rear ext, and tighten the compression to hold the hit. Add travel to the front but make sure its not to loose on the shock ext or it will top out to quick and unload the car.

 

I just do one side at a time, and if I pull the right side it pops upward and needs to be pulled back down to put the bolt in, so I usually do the left side since it is easier. I believe this is known as ladder bar preload.