Brakes won’t ‘hold’

demon322 said

I guess I haven’t looked at it this way. I assumed the front brakes did most of the holding/stopping vs the rear. But I could be wrong there for sure.

What you describe is how I’ve been launching the car at the line. Hold the brake. After staged bring rpms up enough to load the rear end and then stab the gas on the last yellow. Leaves pretty decent but I don’t know if it would burnout like this. Just took off. I was only running 12psi in the rears tho ha

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They certainly do, you're right. But that doesn't mean the rear does nothing. I would say it's about a 70/30 split. Still though, it's a terrible idea to do. Yes, LOTS of people do and have done it, but I have actually seen rear shoe material liquefy and drool off the shoe frames. That's a nasty mess that I promise you do not want.

Besides the line lock, another way to do this is putting an adjustable valve in the rear brake line like the Mopar Performance adjustable proportioning valve. I have even seen people rout in a simple cutoff valve to the rear lines and put it right under the driver's seat. Just some ideas.