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Username Post: Vacuum Advance- how is it supposed to work?
NYH1 
Contributor
Posts: 708

Loc: Central New York
Reg: 07-15-09
04-06-10 11:58 AM - Post#1893896    
    In response to steeler_fan

So would I be better off using an aftermarket adjustable vacuum advance set up like the Crane version or one of the factory cans listed above?

I built a mild 385 stroker motor (4.040" bore x 3.750" stroke). Compression ratio's are SCR 9.1 and DCR 7.93 with the cam I'm using. Which is a Lunatic Voodoo 262/268 Hydraulic Flat Tappet Cam, 219/227 dour. @.050", .468/.489 lift, 112 LSA 1400-5800 RPM range PT# 60102.

I'm using Summit Vortec Heads with a Edelbrock Vortec Performer RPM intake and for now a Holey 80457 600 CFM carb until I get an Edelbrock 650 AVS.

I'm going to use THIS MSD HEI ignition upgrade kit. I want a clean look and don't want to use an "MSD" type external ignition box. My distributor is in pretty good condition. I also have to get a spring kit to set up my machanical advance.

I've read that motors with Vortec heads only like 32° to 34° of total timing. Is that true?

'78 Camaro, mild Vortec head 385 stroker, 9.1 comp. Lunati Voodoo 262/268 hyd. ft. cam, RPM Intake, 650 AVS carb, TH350 Coan 11" 2600 stall, 8.5" 10 bolt. 3:42 posi, 1 5/8" Full length Headers, 2 1/2" Flowmaster Exhaust System.

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