FD725

New to the forum, I had an MMR 900 longblock put in my 05 Mustang GT and I have to rev my engine in order to come to a complete stop or the car will continue to creep. Will installing a new brake booster fix this problem? Car still has the stock one.

SpartaPerformance

Not familiar with that block. Did they say it will not create enough vacuum for brakes? Maybe calling them would be best.

FD725

I haven't tried calling them yet but from what I've been researching, the vacuum problem is probably due to the fact I have stage 2 cams in it. I'm Gona try installing a reserve canister and see if that works. It's a good possibility it will, if not, then I might have to switch to an alternative brake system.

jpplaw

I have .550 lift cams in my 5.3 stroker and vacuum isn't a problem at all. I'd look for a vac leak somewhere, and maybe even try changing the booster although it looks like it might be a PITA to do. LMR sells them at a decent price.