[MarkS57]

FWIW, I am running the Eddy D port 72cc's on a 400 w/ flat top 2262's, which should yield a similar CR to your 428, without any ping issues with a 703 Voodoo or a 2801. Of course being a NJ resident, we do have 93 plentiful, most of it containing ethanol- one benefit to living in this %@#%#% state...that and no vehicle inspection required for anything older than a 1996.

[racerboy]

Originally Posted by MarkS57

FWIW, I am running the Eddy D port 72cc's on a 400 w/ flat top 2262's, which should yield a similar CR to your 428, without any ping issues with a 703 Voodoo or a 2801. Of course being a NJ resident, we do have 93 plentiful, most of it containing ethanol- one benefit to living in this %@#%#% state...that and no vehicle inspection required for anything older than a 1996.

Thanks Mark. Do you only run your car on 93? It’s not a big deal to me, but I didn’t realize that there wasn’t more of a safety margin with the aluminum heads. I would probably run a hydraulic roller cam as well. The guys at Butler sent me over a recommendation. I’ll post that later.


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[MarkS57]

Originally Posted by racerboy

Thanks Mark. Do you only run your car on 93? It’s not a big deal to me, but I didn’t realize that there wasn’t more of a safety margin with the aluminum heads. I would probably run a hydraulic roller cam as well. The guys at Butler sent me over a recommendation. I’ll post that later.


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Hi, Yes only 93; it's not a daily driver. The Wawa near by just started selling 91, might try that at some point just to see.