VP C-11 Compression

Robin Lawrence · 05-05-2025, 09:56 AM

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

05-05-2025, 09:56 AM	#3
Robin Lawrence Sponsor Join Date: Jan 2002 Location: Galesburg IL. Posts: 177 Likes: 252 Liked 714 Times in 120 Posts	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 __________________ STK 308 SS 3088