Does anybody run one? My brakes just seem under powered and unreliable when letting off from the boost. I've replaced almost every part of my brake system and had it bled by a shop to no avail.................. Any last ideas before I blow $300 on a vacuum pump?
I have 2 comments to state about your situation, and a possible solution?
First, the other 1499 turbo Trans Am's, and many thousands of regular ones seem to work fine w/o a vac pump?
Second, I have solved similar situations where a car "has been to a shop", and still had the same issue?
Most of the time the issue is in the master cylinder by not being properly bench bled.
Even if it was bled on the bench, during the installation, air can get into the brake lines, and that is hard to remove.
Do NOT push the pedal until you do the following procedure in the next paragraph:
When installing the M/C, leave the lines loose for 5 minutes or so until after brake fluid slowly drips at the fittings. Tighten the fittings, and have someone slowly push the pedal down and THEN crack the fittings loose to bleed any remaining air. If air does come out, do it again until no more air.
If air has entered into lines, I prefer to gravity bleed each wheel cylinder. Make sure the M/C is NEVER out of fluid. Since this may take 10-15 minutes a cylinder, not many shops will go to this extreme.
By using this procedure on LOTS of GN vac conversions, the individual wheel cylinders do not need to be bled for a very good pedal.
Hope this helps, as usually I do not post this detailed info as I am pretty good with tools, but suck at typing as this one was over 30 minutes to get done after going back to make typing corrections!
