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Old 04-24-2010, 01:51 PM
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Needed: Holley carb tuner in Central FLA

I'm looking for someone who is knowledgable in Holley carbs to tune my combo,
Needing help with fine tuning my carb, I'm no expert, and before I mess it up to where I cant drive the car. I have a 383 stroker that was built by T&L Engine Development, a little about the motor, it has a hydraulic roller cam, was a custom grind, spec'd at 236/242 @0.50 .555lift, (only info they provided) Dart Iron Eagle heads, Edelbrock RPM airgap intake, 10.3-1, it dyno'd at 486hp @ 5800, 478tq @5100, idle at 950 with 9"vac, 12* timing with 32* @3600, the engine is in a 84 camaro Z28, roughly 3400lbs, with a built 700r4, 2600 stall, 3.42 thru a 7.65 10bolt rear,
My problem is I have the off idle bog when accelerating, carb specs from AED, 70 primaries, 82 secondaries, powervalve 4.5, primary squirter .031, secondary squirter .035, I have been searching/reading up on all the info that I can find here. I adjusted the timing recomended by AED, to 18* and 1000 rpm for idle, but I still have the bog, my vacuum is @ 8-10" at idle, in gear it drops to about 5 and flucuates to 8-9", I did the easy cruise and monitored the vacuum at a speed of 30 to 40 with a very light pedal to maintain that speed and the vacuum reads 12-15", the engine will load up pigrich while stopped, fuel pressure at the fuel log is 6psi and sometimes fluctuates to 5psi, mechanicl pump, and the level is barely right at the site hole, and yes it has a primary powervalve a 4.5, the secondary is blocked off, the MSD diz has the black bushing, & 2 heavy silver springs, have adjusted the timing to 18*, and according to MSD's website, that gives me a total of 36* @ 3500, this helped very little, the bog off idle is still there, and any time I stomp the loud pedal while cruising it has a slight hesitation.Once the motor clears it's throat, it runs like a raped ape.

I tried adjusting the idle up, but in doing so I cant adjust the idle adjustment screws, any suggestions before I totally screw up the adjustments.....

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