VP C-11 Compression
 

What's the highest compression ratio you guys have seen that C-11 is still good for?






Bret Velde
2003 I/SA

Re: VP C-11 Compression
 

We routinely run it at 11.8 to 1.

Re: VP C-11 Compression
 

I have been running the C11 in my Coyote for years. Original combo was a 2012 325 HP deal. That RPM was limited by the intake and throttle body so it was out of power by 7500 RPM.
When I switched to the 2013 350 Combo I kept running the C11. The CR calculates to 14.03 to 1. Still works well but with less timing. Since this engine RPM's over 9000 I have been testing C14 ion the dyno. Seems to work well and wants different Air Fuel ratio and Timing. (more fuel and more timing). Engine is still on dyno for some more testing as well as a little C25. Not gonna pay the money to run C25 but want to see if there is a difference and if the tune needs to change..........if I ever need to run the C25.

Robin

Re: VP C-11 Compression
 

Hi Robin,
Been telling Fogle for years the C-25 was a waste of money. During his last freshen we backed to backed C-12 against C-25. L-98 10:1 motor. All we did was pour it in. No other changes. Picked up 3-4 from the start of pull to 8800. I accept defeat. LOL

Re: VP C-11 Compression
 

Did you try c11 to c25 on dyno ?

Re: VP C-11 Compression
 

Did not..

Re: VP C-11 Compression
 

I would bet that the C11 would be better than the C12 on that L-98.

Re: VP C-11 Compression
 

About 6-7 hp better