Auto VE , Auto Maf, PE & Timing Adjustment

[maalmull]

Hi guys

I would like to tune my LS1B the old way (doing it in a single log just confuses me more) can someone summaries the tuning process step by step?

1-VE adjustment (well understood using the Auto VE write up)
2-MAF Adjustment ( is there a write up on this?)
3-PE & Timing adjustment

I am using a serial link between my LM2 and V2 as a friend helped validating the CalcBen1 & EXT.WO2AFR.

at this moment, I tuned my VE successfully and need guidance to complete the tune.


also, is there a write up to create/validate pids that are not available on the existing PID files?


Please excuse me for my ignorance as I am new to the tuning world.

Thanks,

[Tre-Cool]

yep. check out the auto-ve tuning tutorial from the scanner or editor.

Help--->Tutorials

[maalmull]

Thanks

[joecar]

...
1-VE adjustment (well understood using the Auto VE write up)
2-MAF Adjustment ( is there a write up on this?)
3-PE & Timing adjustment
...

2:
this is just like 1. except you disable VE (set B0120 to zero) and log GM.MAFFREQ, and you create a map to mimic the MAF table B5001.
aka AutoMAF.

3:
without dyno: set PE to something like EQR 1.175 and timing to stock 2002 F-car HO and LO spark tables (note: uses LO when MAF is failed during AutoVE).
with dyno: start at PE EQR 1.175 and stock spark timing, make adjustment and check what dyno shows; when you increase timing and/or decrease PE EQR and torque barely goes up, back off that adjustment (give you a safety margin); if you see knock, decrease timing and/or increase PE EQR; remember, these are fast burn combustion chanbers, they don't need as much timing as SBC; pay attention to engine coolant temp.

[maalmull]

Thanks Joe

I am running a stock LS1 in a 03 single cab sierra with 317 heads unported milled to .020 and running 215/223 112 cam & stock truck intake with the 25 truck stock injectors.

My TP in idle is like 9% and AFR fluctuates from 12.xx to 15.xx

Any suggestions?


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[maalmull]

I also based my tune on the truck file not using an Fbody HO , LO tables.

Do u suggest 28 injectors ?


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[joecar]

Questions:
a. is your throttle DBW...?
b. how much power are you expecting to make...?
c. do you have wideband...?
d. do you have dyno time...?


Note: truck calibrations are slow to enable PE (PE TP enable is 90% which is too late, PE enable counter is 1 second or more which is also too late).

[maalmull]

Questions:
a. is your throttle DBW...?
b. how much power are you expecting to make...?
c. do you have wideband...?
d. do you have dyno time...?


Note: truck calibrations are slow to enable PE (PE TP enable is 90% which is too late, PE enable counter is 1 second or more which is also too late).

A/ yes it's DBW
B/ won't go more than 400rwhp
C/yes I am running a serial lm2 wb
D/won't have an access to a dyno until November.

I adjusted the PE TP to 60% and changed PE enable counter to zero.

I would like to note that car runs way better on open loop and that CL just mess the car up.







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[joecar]

a. If DBW then log the pid GM.ETCTP, see what this says.

b. 400 rwhp = about 435-450 fwhp: injectors are limited, you might need at least 32 lb/hr.


PE enable: look at 2002 F-car (65%-35% split enable).

CL: what are O2 switch points (see table B4105), try setting all of them to 450 mV.

...
I would like to note that car runs way better on open loop and that CL just mess the car up.

Is this with or without MAF...?

[maalmull]

I will go thru your advice and log ETCTP.
Yes the MAF is still there as you know it's a 5pin.

I've a 28 injectors laying around do u recommend installing those and copy the injector tables from an fbody ?






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