I have a computer advance distributor. I was wondering what the stock intial timing and total advance is? I don't know if all computer controlled distributors got the same timing or what but the computer controlling it is for an 86'Z28 LG4 305. Can these be tuned for performance?

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1986 CAMARO Z28 -> 150,000 original miles, 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframes connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH Next mods-> LCA lowering brackets, homemade ram air, B&M shifter, AFR 195 heads, 234/234 cam, Weiand stealth intake.

 

The only way to "tune" your computer controlled distributor for more advance is with a performance chip for your computer. Sad but true.

 

Would I be better off getting an aftermarket one? Would a stock replacement vacuum advance one work ok? The engine isn't going to go over 6500rpm. Do you know how to tune these? I was told to get a spring kit and use a medium and a light springs. What should my intial timing be? What should my total advance be? The engine is 9.5:1 compression, stock 89' corvette cam, and 89'F-body cast iron heads. My upgrades are listed in my signature I posted below.



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1986 CAMARO Z28 -> 150,000 original miles, 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframes connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH Next mods-> LCA lowering brackets, homemade ram air, B&M shifter, AFR 195 heads, 234/234 cam, Weiand stealth intake.