Any input about the HEI mallory distributor from summit (part # MAA-8556701C ) ? Anyone have it? If so do you like it? Does it require additional equipment/parts or is it plug and play?

 

If you decide to get a new distributor, consider our custom curved Duraspark Distributor built with our new Full Length Oil Impregnated Bronze Bushing. The full length bushing improves timing stability and spark scatter. If stock appearance is not an issue, take a look at our one piece D.U.I. Distributor. Whether you choose the Duraspark or the D.U.I., we curve each on a distributor machine based on your engine combination. Please see them at:

http://www.performancedistributors.c...stributors.htm

 

Are you using EGR or not?

It affects how the vacuum advance curve needs to to be calibrated, to avoid ping if not using EGR or to get best cumbustion if using EGR to lower emissions under partial throttle. As much as the perf dist guys talk about 'optimized', they don't seem to understand how EGR requires more vacuum advance to complete combustion. Or at least, they couldn't convince me that the distributor I got from them is optimized for use with EGR, or even if they would calibrate it differently if i were not using EGR...

So while any of these will 'work', they may not be optimized for your application.

 

I am not using egr. The engine has the following: dual plane edelbrock aluminum intake, 600 edelbrock carb, rv cam, and full length headers. The rest is stock.