I am getting more timing corrections on all cylinders after a shift from 3rd to 4th at WOT. This happens more with a stage 1 93oct/98ron tune and less with stage 1 91oct/95ron. I am using 93-94oct/99ron fuel. Is this of concern or is this normal as well?
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Probably still a little aggressive for the fuel. Add a little E85 or octane booster and that will tell you if you are octane deficient.
I will probably have to wait longer to get torco or klotz. Got any suggestions for other octane boosters? Royal Purple Max Boost might be worth a shot. Claims to increase octane by 3 numbers for 25 gal. Don't have E85, how much 97% bioethanol (for fire) can I use? Any harm done to the HPFP or Injectors?
97% bioethanol is fine, mixing up to 5-10% should be fine for the pumps.
What is your maintenance history on:
- Plugs
- Coils
- Injectors
Additionally:
- LPFP or HPFP ever been replaced?
There could be a situation that your pumps can't keep up. For that, measure your high and low fuel pressures.
What is your maintenance history on:
- Plugs
- Coils
- Injectors
Additionally:
- LPFP or HPFP ever been replaced?
There could be a situation that your pumps can't keep up. For that, measure your high and low fuel pressures.
Plugs and Coils are less than 10k miles old. Injectors are index 1 except two new index 12 (4000 miles) and those two also have timing corrections. HPFP was replaced but not sure. It gets to 2500-2600psi on the rail at the beginning of WOT and tapers to around 1800-2000 psi at high RPM. I dont see any large pressure drops. Cant remember properly but idle is maybe 600 or 700 psi. Low pressure is consistently about 70-85 psi.
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