The general consensus is you will gain a few %, like 2-3%, in power output per point of compression ratio gained. So a 200 hp engine moving from 8.5 to 9.5 might gain 5hp, nothing significant. You would never notice that. On a 500hp engine, that % change would become more noticeable.
An engine is a system, so if you were to bump the compression and increase the VE, then you start making noticeable power changes.
So not significant which is what I noticed. I was tracking top end mph At the time-Test loop was to put the pedal to floor- GPS check the speed on a flat piece of interstate. but the head shave for its moderate gain, I recall just felt better with the drivability.
I don't think moving the dynamic compression ratio to 8.0 would require more than 87 octane.
In my opinion this is the biggest problem.
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The red cells are timing adjustments I made. I don't think throttle position has any influence. The RPMs and absolute pressure are the dominant inputs. With the stock timing the ECM reduces power when you need more power to go up a long hill on the interstate.
I have to ask- horizontal lines are RPM increments/ the vertical is Absolute pressure? not familiar with MAP range inputs- Looks like you made some significant timing changes though in that quadrant -those original numbers look low.
how did you manage that? I have a little experience helping my son get a car up And going on a mega squirt system/ tuner studio- basically auto tune set stoic targets, and tweaking the base line timing on the old OBD I systems. Said another way, enough to get into trouble