I was about to ask about line lock on a PSMCDR 4speed Buick, because I am about to rebuild the front end on the '68 GS 400, since I have read this thread I am in agreement that we don't need no stinking line lock, just do what we do in the burnout box. And let 'er rip. Made best pass at Mid-Michigan last year ever, with no changes with the car in 10 yrs, must have been the weather, and the driver getting a clue!
Before I spun a bearing in my 69 GP 4spd (top ending it - 118), I did some practicing of launches and tire "heating". My car has front discs and held with no problems. While I respect Mr. Glasgo immensely, I must state that I am against line locks. This is supposed to be the pure-stocks; it takes skill and guts to drive these things right. There is a way to upgrade GM drum brakes and stay with drums; Dan and Bob did an actual test of the upgrade in Musclecar Review a few years ago. I understand safety concerns, but not so much that a line lock is necessary. NO TO LINE LOCKS!
You guys are way too anal.You allow X pipes, bigger than factory exhaust,ign systems there is plenty of things going on that aren't "pure". This is drag racing.Yeah any guy with a stick can do the three step, but why? Why would anyone want to heat up thier brakes and converter.It seems silly.I understand you guys want to keep the cars looking right.I'm all for that.I'm also for things that make sense. I vote for line locks
I think the point i was trying to make,is that almost everybody heats thier tires up,and this can only done by holding the brake pedal,so the rear wheels are spinning while the brakes are on.I guarantee that if anyone who does this,pulls thier brake drums off,thier rear shoes are cracked.I thought a HIDDEN line lock would be cool.Lets face it many of the cars are purpose built and probably not hardly ever driven,so what difference does it make? Brakes are the most important part of any racecar,so why not be easy on them.It was just a thought,and i am done with it:bla:
Spring has sprung around my place:TU: I think everyone just needs to go outside, take in a deep breath of fresh air, and say goodbye to the winter blah's:rant: What we all need is a trip to the track to clear our heads, then all will be right with the world again. I'm all for the PSMCDR, and if you guy's want line locks for the manual trans cars, that would be fine with me. A big NO for the auto trans cars.
The turbo guys like to put the line loc in the rear brakes so they can hold the rear tires and build a lot of boost for the launch. A line loc on the front brakes is usually used for heating the rear tires only, allows the rear brakes to be adjusted a bit tighter for better stopping at the big end of the track and does help the rear brakes last longer due to less heat build up in the brakes during the burnout. Line loc or no line loc, it doesn't matter to me. However having run 4 wheel manual drum brakes on my car does make for some interesting stops at 105+. At 110+ it can get real interesting. I view the line loc as more of a safety feature. As long as the line loc is in the front brake system and doesn't stick out like a sore thumb, I do not have a problem with them.
on mine and my brother's turbo Buick's, we used double line locks, front for burnout's, and rear for staging... worked like a charm
I really don't care if they are aloud or not,i'm not going to put one on my car,ive had both 4spd's and auto's at the psmcdr and never had trouble heating the tires,if we start with line locks where will it end,headers,drag radials,cool cans,keepem pure stock.
In my case, the car is purpose built to drive me to Stanton and back (with a lil' racin' in between).:grin:
Hi Guys, It's been a while since I posted last here. It's good to be back! Bob and I want to let you know that we've been reading your thoughts for and against line locks, but we will continue to not allow them. John G., the problem with my Chevelle was the master cylinder. It was not pressurizing the front disc brakes adequately. It seemed to bleed okay when we installed it, but for some reason, the rear brakes were doing most of the work. Whenever I would do a burnout, I'd just floor it in drive with my foot off the brake pedal, and whatever wheelspin I got up to the starting line was good enough. However, when Scott Tiemann drove it, he'd like to sit there and powerbrake it, neither of us realizing that the fronts weren't doing much at all. I did notice that the car was somewhat hard to stop after a run (spongy pedal), but I chalked it up to crappy pads and shoes. The damage was done and it made itself heard at Bristol. When we beat everything back in place and backed off the rear shoes, the car would barely stop! That's when we put two and two together and realized that the master cylinder was faulty. I haven't fixed the rear axle or replaced the master cylinder yet. o No: o No:
Glad to see you post Dan. Tell Bob we say hey. Remember Dan, I told you to stick the BB in the rear port of your master cylinder before you screwed the line on, so it would block pressure to the rear brakes. NOT THE FRONT!:laugh: Geez, you buy em books and send them to school and they still embarass you.:bla: :bla: Talk to you soon Dan. Don
Being a 4-speed driver, I would like to have a line lock which would be well hidden. Having to rev up the engine to 4,000, dump the clutch, spin the tires for 20' and then get on the brakes for the starting line is a lot rougher on the drivetrain than simply setting the line lock and doing a simple burnout. See you guys at Martin, Muncie Dragway, and Stanton:TU: Dave
