Topic: Ignition timing
in Forum: C3 Engines
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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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Lifetime MemberHot 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
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
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.........
in Forum: C3 Engines
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