Confused on IFR settings

[hquick]

I'd be using this as a B3605 table for the AutoVE

[joecar]

Sam, the 1998+ Camaro/Firebird had returnless systems as did the 1999+ Corvette.

[samh_08]

Makes sense now, thanks Joe.

I just put in the Injector Voltage offset along with the minimum pulse and small pulse adder from a 06 GTO in my calibration and now it idles rich as hell (its raining and I havent had it on the road). Should I keep these values as a known good and adjust my other tables accordingly?

Other things I noticed:
1) A 05 Vette LS2 and 06 GTO LS2 both have the same injectors, why are some of the tables different?
2) My stock Injector Voltage offset table is quite a bit different from any other calibration. Is this table changed with each different injector, or is it used to tune something else?

[hquick]

As I said before...really hard to find decent info on injector tuning. Apparently Greg Banish has a DVD or book coming out on this exact subject.
Main thing is you have the IFR correct...and you can play with the others.
I think you'll find alot of variation throughout the rest of the settings depending on the vehicle they're used in.
For me...I've found there's so much conflicting info out there...it's a matter of trial and error....baby steps.
Use some 'known' OEM settings and see how you go with the AutoVE process.
Did you see the difference in the B3605 table I posted?
I think you would have been seeing alot of 'semi closed' loop with the settings you had...which would be throwing your AutoVE right out.
Don't forget to reset your fuel trims now.

[5.7ute]

Not knowing too much about the US cars I can offer a couple of generalisations.
If the 06 GTO which your injectors came from run the same returnless system, you should start with all of their injector tables.
However if one was returnless & the other was a manifold referenced return system the offsets would be different due to the different pressure differential over the injector.(this will change the opening/closing time of the injector)

[samh_08]

I just drove it

Not good...Haha AFRs all over the place. Are the injector voltage offset tables made for the injector itself or exclusive to each vehicle's tune?

I know Im not making myself very clear but its hard to explain. Is the table for the injectors charactoristics or tuned to supplement other tables in the calibration?

Let me know if you follow me, Thanks

[5.7ute]

I just drove it

Not good...Haha AFRs all over the place. Are the injector voltage offset tables made for the injector itself or exclusive to each vehicle's tune?

I know Im not making myself very clear but its hard to explain. Is the table for the injectors charactoristics or tuned to supplement other tables in the calibration?

Let me know if you follow me, Thanks

The offsets & all the other injector tables are based on the injectors characteristics, not the rest of the tune.
FI offset is pulsewidth added to the injectors calculated pulsewidth to allow for the injectors opening/closing time.
Small pulse adjust is added or subtracted pulsewidth to give a linear injector flow rate. etc,etc

[samh_08]

The offsets & all the other injector tables are based on the injectors characteristics, not the rest of the tune.
FI offset is pulsewidth added to the injectors calculated pulsewidth to allow for the injectors opening/closing time.
Small pulse adjust is added or subtracted pulsewidth to give a linear injector flow rate. etc,etc

Thanks for the explanation. So if I have LS2 injectors, which tables do I use? The 'LS2 injectors' somehow have different characteristics in two vehicles that have them, 05 Corvette LS2 and 06 GTO..I have been comparing with stock tunes from holdencrazy.com.

If anyone has time, I would appreciate if you would take a look and see what I am talking about.

Let me know, Thanks again!

[5.7ute]

I see what you mean. Both the offset & small pulse adjust are different in each tune. Whether this is due to a change in the injectors internals or an incorrect previous calibration I dont know.

[hquick]

Personally....I'd just pick one and start on the AutoVE.
This is the whole issue with setting up injectors. There's so many variables...even for vehicles using the same injectors.
What's the motor out of?