Anyone every run a 4 wheel line lock before? On my car I have a nice GS interior. I do not like the idea of a reverse pattern shifter on the floor. My chevy friends know of a mopar who bracket races with a 4-wheel line lock connected to a 2 step and delay box. They say he leaves very hard just like a trans brake. I was thinking about a line lock with a 2000 low side chip and a 3000 low side chip on the stage2 car. Neither car has a trans brake. I'd like to do this on my street car because i run a 2500 converter with a 1000 thermoquad which is inconsistent when the big door opens up. I think with a 3500 stall the problem would go away but i really like to get the rear jets flowing before the car launches.
For consistency, you can't beat a transbrake! My 1000 cfm Termoquad loved being on a transbrake from 3200 to 4800rpm. It liked it so much, I have developed a 1" Plemum Throttle Stop with the folks at #1 Stop Products. However, it would not work from 2000 to 2500rpm. I have seen many people use line locks w/o transbrakes and have problems with the car creeping. You'll find, at those low rpms at the starting line, the manafoldt will puddle up fuel at the base and cause inconsistent 60' times. I used a transbrake, two step at 3500rpm, Delay Box of course, and the 1" Plenum Stop and was a very successfull bracket racing combo at any ET. As far as the shifter goes, we used the stock shifter with a few modifications.:Brow: The car in my avatar had a full interior with a roll cage "including the stock shifter". I you would like a reverse pattern stock shifter for a GS, please PM me and we can talk about sending you one or having the one you have retrofit to work. The shifter will still have the correct lockouts to prevent any miss shifting or, heaven forbid, a miss to reverse. It works very well and maintains that stock look. If you do decide to use line locks, I suggest to use an inline throttle cable line control to prevent large amount of fuel shot into the manafoldt at that low of rpm and eliminate the two step.
I tried this years back,My findings were that with a stock style A-body suspension the left like crap,look at the stock eliminator cars,they leave near idle.This is to utilize the suspension travel where as with leaf springs they will work better when you leave at a higher RPM against the converter. I had the low side at 2400 but when I footbraked the the car it liked to leave at 1500,it 60'ed as good as 1.47 and was only a mid 11 sec car. My current car has a 'brake with a reverse VB and when you look at the shifter all you'll see is a factory console and shifter,a little creativity will do the job here.
I think the 4 wheel line-lock has alot of potential on a street car, especially if you don't want to go through the expense of a transbrake. I bracket raced a 72 455 Skylark in the early 90's when delay box racing started to get big, and we tried a delay box with one line-lock and a throttle control. The car was so lethargic reacting, and the throttle control was inconsistent. Also the travel on it was so short, to keep the car from creeping, we had to back the throttle off to where the secondaries wouldn't even come in. Then the ET varied as to how hard you pushed the gas pedal against the carpet (yes, it was that touchy). Needless to say, it gave us fits. Then we switched to an MSD electronic governor and added another line lock for the back brakes, and problem SOLVED! The car was deadly consistent, and won 2 local points championships. Then with the addition of a 10" converter, the car turned 1.54-1.55 60's like clockwork on 28x11 slicks, won races, then we bolted the street tires on and drove home. We had an MSD adjustable chip set around 1800rpm w/the 10" converter, and around 1600rpm w/the 11" converter. I'll go with these guys and say if you dont mind going through the cost and install, go with the brake, but you can be very successful bracket racing a dual line lock streetcar too. BTW, the car above also had a reverse pattern valvebody and a column shifter too, also doubles as a dandy theft deterrent. :Brow:
