i am wanting to put a line lock on my 92 formula 350 (TPI) but the kits all say not for use on abs cars,,and not for metric fittings... my questions are, will a line lock work on this car, and are my fittings metric??? thanks kp

 

use this kit:

http://www.summitracing.com/parts/sle-24048/overview/

and you don't have abs but yes, the fittings are metric

here it is on my car

 

Although it may not be a pretty solenoid and it will cost more than just buying a basic solenoid but using the above mentioned kit eliminates all the headaches of converting the lines around to make something else work.

My car has been plumbed with standard lines and I use a very inexpensive Biondo line lock. I use adapter fittings just for the master cylinder but also don't use a third gen master cylinder but do use a late model GM master cylinder with the plastic reservoir. Because of how close the master cylinder is to the strut tower, GM moved the lines to the inside towards the engine on third gens. Just about every other master cylinder has the lines on the outside, away from the engine.

Line locks all work the same way. Step on the brakes, engage the line lock which holds the pressure in the front brakes then release the brake pedal. This allows you to do a waterbox burnout without any pressure on the rear brakes. Cars with manual transmissions have also used line locks on the starting line to keep them from accidentally rolling through the beams.

Looking at that kit, I see the solenoid is between the master cylinder and the combination valve. I've heard that doing it like that may trip the brake warning light since there's only pressure on one side of the switch. The switch should recenter itself after the line lock is released and the brake pedal is pressed again but I've never had any experience with doing it like that. SLP is selling a kit like that so it must not be an issue for them.

The reasons they don't recommend using line locks with ABS is because it will set fault codes from not seeing wheel speed on the front brakes. If a car has traction control, it may also apply the brakes to reduce the wheel spin. It's not something to worry about on a third gen since the later models only would have rear ABS. My 91 454SS that I raced many years ago has rear wheel ABS and when I came out of the water box, I could feel the brakes chattering as I was trying to slow the wheels back down rolling to the start line. Never set any ABS faults.

 

no thirdgen came with abs or traction control

 

ok, thanks..the summit page that link goes to says the fittings are npt- is that standard or metric--sorry just trying to fogure all this out,,

 

It must be talking about the fittings on the solenoid. It comes with everything you need to put the linelock on.

 

Fittings in the solenoid will be NPT. Fittings in the master cylinder and combination valve will be metric. Since they provide the lines in the kit, they will already have the proper fittings on the lines.

 

FWIW, early 3rd gens used SAE fittings for the brake system.

 

Only 82-84 cars got the sae fittings.

 

i have the slp kit on my car as well. that is the way i would go on a thirdgen. easy peezy. works great.

 

There's one or two of them still out there...

 

lol, yes. i have one. but i didn't think the info was relevant in this thread, since he's asking about his 92 car. clearly he's already confused, even his questions are a bit poorly structured, probably from confusion. so i was trying to keep the confusion down by offering a kit that is a plug and play.

carry on, lol

 

I was only thinking of future search hits, and completeness of the information.

Still carrying on (as usual...)

 

i suppose that's not a terrible idea, lol.

 

thanks for the help everybody..i got it now...the fittings on the solenoid are the npt that was what was throwing me..gonna sharpen my drag skills with my street formula, while I finish my 82 big block car..so the 82 will have sae threads- thanks again... kp

 

Ah, so that information was useful...

 

A line lock(s) with a twist.Get two solenoids,one for the front for the burn-out and one for the rear on a switch.Flip the switch forward for just the front and flip the switch rearward for both the front and rear.Stage the car with both on and just let go of the button for a poor mans (well sort of) tranny brake.Why??. Well the line lock button/solenoids is going to be just a tad faster in R/T's than a foot brake.

 

Most footbrake classes that I'm aware of outlaw the misuse of linelocks like that.

 

Yup. "No line lock on drive wheels."

Sometime I'm going to have to tally up the number of tranny brake cars I've taken out foot braking over the years. Including delay box cars...

 

Now would I ever suggest something that wasn't legal??.

 

And the SLP kits is listed for 87-92 cars, so again, metric or not should not be a question.

 

As long as the '82-'84 guys reading this understand the SLP kit won't work with their cars without adapters.

 

But the 82-84 cars can use a basic generic kit.

 

My dad bought a Buick Apollo that was set up with a front and rear line lock. He never really launched with them but if you wanted you could engage the rear line lock before you push the brake so when you do your burnout with the foot brake there is no pressure going to the rear.

Launching with launch control like that isn't really an advantage if you know your car. If you can cut a .000 light with a foot brake vs someone who does it with a transbrake/ line locks, there is no advantage to either of you.

 

I agree with that.You still have to release the button or brake.Kind of why they are illegal is questionable.
A variation of that would to wire a second solenoid together with the line lock.The second one for a hydro clutch that would release the clutch and line lock at the same time.

Ya know the speed of electrical current is faster than you................but like I said you still have to have the R/T's to release the button.

Me??. Trans brake for yrs. Grooming comes from a track weekly that if you can't cut a 15 or better,your not in the show.