Correct if I'm wrong but the higher compression helps with spool and out of boost driving right?

 

spool, no. off boost power, yes.

 

So doesn't spool the turbo quicker? I thought with higher compression cfm flow would go up and fuel flow from drawing in more air and more air flowing would move the turbine faster? Or is it just transient responsive is better thus with higher compression going threw the rpms faster and spoiling the turbo giving the illusion that it's spoiling faster but in reality you are just going threw the rpms faster? I mean I know on lower compression you could run more timing down low to spool the turbo quicker. I'm very interested now on some feedback on this topic! Remember I'm a pizzaman so be easy on me! Lol!

 

The higher compression makes more power from the same air and fuel. So there is actually less energy in the exhaust and the same volume of air so it wont spin the pinwheel any faster. Off boost manners are inproved as well as on boost power. As long as you dont run into detonation due to octane limitations you will usually make more power with higher compression all else being equal. There is most likely a limit where compression will no longer help but I dont know what that point is and if we have any fuels that can allow that. I have heard on nitro because of the volume of fuel used compression is limited by the actual volume of the fuel in the cylinders causing hydrolock.

 

Correct. A Top Alcohol motor will be in the 10-11:1 range on methanol with 35psi of boost from the 14-71. The same Nitro motor will be in the 7 range, since its fuel and air that make power not compression.

We use the term "all motor" power to describe what the compression helps with. Its really obvious in the auto cars where the choice is make lots of power out of boost or use the bottle to do it. It only takes 40-50whp over what most turbo builds make out of boost to make the difference. I know of one car that is getting a 3794 up on the converter with no nitrous and 12:1+ so its situations like that where the biggest difference is made.