Olds 350 spark plug gap
- Thread starter kifried
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it kinda depends on the ignition system. if it's stock, see the above post. if you have upgraded it (higher power coil, bigger wires and better plugs) then start at .040 and increase it bu .005 increments. drive the car for a few dozen (minimum 100mi is beter) miles to see the condition. i'm running a chevy 383ci at .060 (.035 stock) with an upgraded ignition, including platinim plugs.
I think I run a .45 gap with my modified HEI. I have an Accel coil and a MSD module with a rev limiter in mine, but I still run stock gaps with my NGK V Power's. What kind of ignition system do you have? Stock Delco points from the 1971 engine or maybe an HEI or some aftermarket ignition? The kind of ignition you have determines what plug gap you can run. Points ignition, for example, is relatively weak since it has a ballast resistor to cut the voltage and increase the life of the points.
I have AC Delco platinum plugs, I gap'ed them at .035 but haven't really run the engine yet, so I can take them out and re-gap them.
The engine has a MSD distributor with MSD wires, though the coil is the stock one that was on the previous buick 307. I plan on upgrading that sometime in the near future.
The engine has a MSD distributor with MSD wires, though the coil is the stock one that was on the previous buick 307. I plan on upgrading that sometime in the near future.
Really?!85 Cutlass Brougham said:
I had an accell racing coil in my street stock, first week out made half a lap and the car totally died and wouldnt start.
The coil went bad, went back to the stock coil, ran it for 4 years flawlessly.
Never looked back, good to know some people have better luck then me
Just Karter said:Really?!85 Cutlass Brougham said:
I had an accell racing coil in my street stock, first week out made half a lap and the car totally died and wouldnt start.
The coil went bad, went back to the stock coil, ran it for 4 years flawlessly.
Never looked back, good to know some people have better luck then me
Mine has been on the car since 1996 and still works fine. I am not a huge fan of it however, and plan on eventually swapping to a complete MSD HEI distributor in the future which comes with a coil, cap, rotor, etc. My distributor came out of a 1977 Chevy Impala wagon, and cost me $10 back when I did the swap in the mid 90's. I want to upgrade to a new unit as I feel the old one is well...old. Plus, the advance curve is easier to tailor on the MSD HEI than the Delco unit, and my engine likes initial advance but needs less total. I could mod the GM unit by welding the window part way, but I just want something I know is good.
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