I have a 70 Duster with a mild 440, 727 w/4200 stall converter and transbrake, Dana 60 w/4.10 gears, 10.5x29" MT slicks, Comp Eng. adjustable drag shocks set at 50/50, no pinnion snubber (currently) and a set of the 002/003 super stock springs.
When I launch with the transbrake, I get some wheel hop, with or without the pinnion snubber. When I foot brake launch, I get no wheel hop, pull the front wheels a few inches off the ground, and have about the same 60' times. I've asked around a bit, and get quite a few reasons for this. Use of/lack of or improperly set pinnion snubber, shocks to short, played springs, etc. I've tried with the snubber, without the snubber, set the snubber to touching the body, 1/2" and 1" clearence. The shocks are definately long enough with 4" of excess travel with the springs full extended. The springs are installed properly and only have about 15 passes on them.
I haven't tried the aluminium busings in the front or putting extra straps on the front section of the springs yet. Would either of those help or are the SS springs just not a good choice when using a transbrake? Would I be better off going with the Caltrac setup?. The car sees some street time, but I'm more interested in launches at the track.
When I launch with the transbrake, I get some wheel hop, with or without the pinnion snubber. When I foot brake launch, I get no wheel hop, pull the front wheels a few inches off the ground, and have about the same 60' times. I've asked around a bit, and get quite a few reasons for this. Use of/lack of or improperly set pinnion snubber, shocks to short, played springs, etc. I've tried with the snubber, without the snubber, set the snubber to touching the body, 1/2" and 1" clearence. The shocks are definately long enough with 4" of excess travel with the springs full extended. The springs are installed properly and only have about 15 passes on them.
I haven't tried the aluminium busings in the front or putting extra straps on the front section of the springs yet. Would either of those help or are the SS springs just not a good choice when using a transbrake? Would I be better off going with the Caltrac setup?. The car sees some street time, but I'm more interested in launches at the track.