What did I do??!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**HO455** · 03-23-2019, 02:37 PM

Until you put your old distributor on a distributor machine and verify the curve you are shooting in the dark. Have your new HEI's mechanical advance set up to match your old distributor then if you are still not satisfied then look to other components.
My rule #1 is always look to the last thing you messed with when you have a problem
The mechanical advance curve of a distributor is the "computer" that controls at what millisecond the spark fires.
A good operator of a distributor machine can find you lost mileage and horsepower. It is one of the best bang for your buck services you can have done to your vehicle.

03-23-2019, 02:37 PM	#26
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,282	Re: What did I do??!! Until you put your old distributor on a distributor machine and verify the curve you are shooting in the dark. Have your new HEI's mechanical advance set up to match your old distributor then if you are still not satisfied then look to other components. My rule #1 is always look to the last thing you messed with when you have a problem The mechanical advance curve of a distributor is the "computer" that controls at what millisecond the spark fires. A good operator of a distributor machine can find you lost mileage and horsepower. It is one of the best bang for your buck services you can have done to your vehicle. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377



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