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Datalog More timing corrections on WOT

suspect

Lurker
Nov 7, 2023
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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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RTA

Private
Jun 17, 2020
41
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Running a stage 1 tune for 95oct, using 93-94 oct and wondering about timing corrections?
 

suspect

Lurker
Nov 7, 2023
15
0
0
Running a stage 1 tune for 95oct, using 93-94 oct and wondering about timing corrections?
No.
I’m running a 98RON (93oct) map with 99RON (93-94oct) fuel. I have corrected it now. Either way the fuel used has higher octane rating than the maps being used.
 

SlowE93

Major
Jul 2, 2017
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Just a plane ticket away !
Ride
E93
No.
I’m running a 98RON (93oct) map with 99RON (93-94oct) fuel. I have corrected it now. Either way the fuel used has higher octane rating than the maps being used.
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.
 

suspect

Lurker
Nov 7, 2023
15
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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?
 

RTA

Private
Jun 17, 2020
41
19
0
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.
 

suspect

Lurker
Nov 7, 2023
15
0
0
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.
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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suspect

Lurker
Nov 7, 2023
15
0
0
Graph 1


Fuel from a different place, stage 1+ and new fmic. There now less timing corrections. Second graph the car cut the throttle I must have left traction on. Cylinder 5 shouting most of the time. I am lowering the tune until I can try ethanol.
 

suspect

Lurker
Nov 7, 2023
15
0
0
Graph 2