20cc domes with +5 timing

[adrenaline junky]

Im running a drag ported motor with 20cc domes and +4 timing. I was wondering, if I cranked it up to +5, would I have to run race gas, or just premium from the pump?

[Snopczynski]

You need to know your compression and squish to make that determination.

 

Are you drag racing only with this motor?

[adrenaline junky]

You need to know your compression and squish to make that determination.

 

Are you drag racing only with this motor?

 

No im duning and some other things to. My compression is not too much. Last time I checked it it was 142. Andd i know that that is perfect. Plus I have a temp gauge mounted so that I can view it while riding.

[Snopczynski]

As long as the squish isn't huge it should be ok on pump gas. It will run cooler on like 50/50 100 octane though.

[adrenaline junky]

As long as the squish isn't huge it should be ok on pump gas. It will run cooler on like 50/50 100 octane though.

 

It runs at 170 degrees right now and its on +4, what will it run on +5? Because it used to run 220 before I put the cool head on.

[Snopczynski]

a 50 degree decrease in temp is about impossible just by bolting on a cool head. You really need to know your compression and squish when dialing all this stuff in. I cant recommend timing and octane settings without knowing this stuff.

[adrenaline junky]

a 50 degree decrease in temp is about impossible just by bolting on a cool head. You really need to know your compression and squish when dialing all this stuff in. I cant recommend timing and octane settings without knowing this stuff.

 

Yeah but I had a few other mads done to It though too. Thank you very much for the advise.