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I have a 71 LT1 that is stock except for Accel coil. When timing is set to book spec 8 degrees btdc car has small miss from idle to 6000 rpm. With timing set to 12 degrees btdc car run perfect as far as I can tell. Should I leave it at 12 or reset to 8 and try and find another cause for the miss?
Thanks
Neil
Thanks
Neil
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Send PMHot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
run it as high as you can without detonation
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Factory setting is only for smog/gas mileage. My 73 was set at 14 from the factory. According to the chart I have the set point changed from year to year and which engine it has. I had mine recurved so it would get to 36 degree's at 2800 rpm's for better performance. At idle it is at 16btdc.Brian - NCM Lifetime Member
73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System
Dewitt radiator and dual electric fans
Borgeson Steering box
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Dito with Brian. Mine is also set to 36 degrees BTDC by 2500-3000 RPM. Much better response with the only down side of a little harder when cranking over. 
1980 L82 (5069 made), Dark Green Metalic (844 made)
Gymkhana Suspension, AM/FM/CB, Sporting a ZZ383.........
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in Forum: C3 Engines, Driveline and Handling
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