what is the limit on high compression before the motor wont run on pump gas?

 

the limit would be the ponit where it starts detonate (ping knock)

 

lol no **** haha what i'm getting at is like i aint tryin to buy pistons and put it all together and have to run race fuel ya know

 

It depends on a few factors. I heard the highest you can do on street fuel is between 10.5:1 and 11.0:1 But dont quote me. You can also shave down the head to drop the compression also. What are your plans?

 

yes, i know about decking the head. i ordered a mopar per computer, i'm getting a nice set of crower cams and wanted to go like 10.5 or 11 compression but i want to stay on pump gas

 

I ran 10.5:1 on my sohc, with mopar ecu, udp, no a/c or p/s, then afew other basic bolt ons. I beat my cavy that ran 15.2. I was impressed. Anyways. I wouldnt get the mopar ecu if you plan to run all motor. Go with af/x? Higher rev limiter and more advance timing. Then go with the 10.5 pistons with a slight deck on the head. Run 92 or 93 octane. Maybe a small shot of nos is in order. Dont forget do upgrade your valve train.

 

Just to expound a little. Dont get the Mopar PCM if you want to go turbo. if your going NA though its fine for a mild build. if you want extreme go with AF/X or if you really want to, go with mega squirt.

 

i ordered the mopar computer, waiting for it to come in, i'm also ordering crower cams. i want to go high compression so no need for any other type of computer.. i just really dont want to run anything other than 93.

 

I think by saying he is wanting higher compression, that turbo is not in his plans. If that were the case, then he would want to lower his compression.

 

Yeah I know i just wanted to expound for other people just in case they wanted to go turbo.