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Ed Wright · 05-08-2017, 09:45 AM

Rich, raising the fuel pressure makes your air/fuel richer, if you don't lean it back down in the ECU. I found six hp, in A-B-A testing on the dyno raising my fuel pressure from 45 to 60 psi, with the air/fuel tuned back to the same values with both fuel pressures. (Be certain to enter your new injector flow rate with the new fuel pressure) Nothing else changed in the ECU. After tuning the A/F ratio back to the numbers that made the best power at 45 psi. To verify it wasn't something else did it, I put the 45 psi tune back in the ECU, made another pull, lost my new 6hp. Turned it back up to 60, put the 60psi tune back in it, got my new 6 hp back. Same 13.1-1A/F both ways.
Your results may vary.

05-08-2017, 09:45 AM	#4
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Fuel flow Rich, raising the fuel pressure makes your air/fuel richer, if you don't lean it back down in the ECU. I found six hp, in A-B-A testing on the dyno raising my fuel pressure from 45 to 60 psi, with the air/fuel tuned back to the same values with both fuel pressures. (Be certain to enter your new injector flow rate with the new fuel pressure) Nothing else changed in the ECU. After tuning the A/F ratio back to the numbers that made the best power at 45 psi. To verify it wasn't something else did it, I put the 45 psi tune back in the ECU, made another pull, lost my new 6hp. Turned it back up to 60, put the 60psi tune back in it, got my new 6 hp back. Same 13.1-1A/F both ways. Your results may vary. __________________ Ed Wright 4156 SS/JA Last edited by Ed Wright; 05-08-2017 at 09:48 AM.