Thread: Tuning Aftercarb And Regulator Installation

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I INSTALLED THE REGULATOR, PUT NEW PLUGS AND SET AT 5.5 PSI.ALL SEEMS WELL NO SOOT OR RICHNESS.DOES ANYONE KNOW EASIEST WAY TO SET THE TIMING FOR PEAK PERFORMANCE,ALONG WITH FLOATS. STOP AND GO DRIVING MY IDLE RAISES JUST BEFORE I STOP AND THEN RETURNS TO NORMAL AFTER COMPLETE STOP.PLEASE DONT LAUGH AT ME I HAVE ALWAYS DEALT WITH A STOCK 350 BEFORE THIS 402BB.THANKS FOR ANY HELP. P.S. OF COURSE IT STARTED RAINING WHEN I COMPLETED THE INSTALLATION SO I COULDNT PUT THE HAMMER DOWN BUT DRIVEABILITY IS MUCH BETTER WITH REGULATOR.

First make sure you can see the line on the balancer, if not mark it with either white paint . Unhook the vacuum line to the dist. and plug it, set idle at around 600-700 R.P.M.'s set timing at around 10 degree's. It's alway's a good starting point, you can alway's advance it more if you need to.Turn idle screw's in untill motor starts to stumble then out 1 1/2 turns. Set floats by opening sight hole's,if fuel pour's out lower floats if no fuel is seen raise float's . The fuel should just trickle out the thread's of the sight hole.Clockwise will lower and counterclockwise will raise the float's. I believe Holley recomends a pressure of around 4-5 P.S.I. at around 8 P.S.I. the pressure will overwelm the needle and seat assemblies.Use your own judgement.If you have a high quality timing light check your advance , also check total timing it should be anywere from 30-36 degree's depending on you 396's high po part's.

you say the idle increases as you step on the brake??
This could be caused by a vaccume loss some where in your system,,,could also be a bad diaphram in the brake booster,,which only shows up on application of brakes.
My money is on vaccume loss or leak.