adjustments

[bad V6]

Planning a trip to the track soon and would like some help in setting up the rear suspension. The car currently has:

H & R Parts sway bar set to 1.5 turns preload
Baseline Suspension upper adjustable arms set to -1.5*
stock boxed lower control arms with poly bushings
Competition Engineering shocks, front @ 60/40 & rear @ 50/50
275 MT drag radials set to 17.5#
airbags LT & RT do I need to use?
No front sway bar

The car consistently 60' around 1.48-1.5 on the foot brake. I started getting the car to react better leaving the line at the end of last season, but would like some insight as to what adjustments should be made.

Thanks

 

[forcefed3.8's]

When I had the stock 10 bolt I used 10 psi in each bag to keep the rear from squating, but your baseline uppers should take care of the squat. I had 3deg pinion angle. You might need more with the poly bushings I had the delrin. I easily went in the low 1.4s with stock uppers and umi lower atr bar and an air bag. The car was more consistant with the hr stuff though.

 

[bad V6]

Thanks Rob.

As far as the airbags, I have 8" wide wheels with 4" BS, so the tires rubbing the frame or fender should not be a problem. I have noticed that with the baseline uppers the rear of the car lifts while building boost prior to the launch. I wish I knew how the track prep will be, I recently got a set of the MT drag radial pro tires mounted to use this season.

 

[forcefed3.8's]

When I installed the 12 bolt I noticed the same thing. I think you should be good with the pros. My hoosiers hooked on no prep.

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[bad V6]

I had some issues with the wastegate last night and by the time I made it back out to the track only got in 2 passes. The first pass was on the MT drag radials (set at 17.5#), trying to leave at 3500 RPM and 5#. But by the time I got my club foot off the brake, the car actually began moving 3/4 of a second later at 4900 RPM and 21#. The car spun real bad, pedaled it and went 2.2/60' and 11.44 @125.5 on 22# of boost. So, we bolted on the MT Pros (set to 17.5#) and added 3# of boost and left with the boost gauge at 5#, RPM was at 3400. The car went 1.8/60' and 10.9 @ 127.2. For the car to come out of the hole good it needs to be up around 4000 RPM with the boost at 15#. The car went 10.2 @ 132 last season with a 1.48/60' on 26# of boost. I still don't have the tune where it needs to be and plan on going back out next weekend. Should I have to push it to 4000 RPM to get a decent 60'?