Snyper

iTrader: (27)

Is there any way around this? I purchased 83#injectors for my car but when I go to enter them into the slots they automatically go to 63#s.

HUNTER02SS

iTrader: (24)

What table are you trying to make the change in? You should be in the
Injector flow rate VS. KPA VAC table. I entered in your injector size and it worked for me. Did you also do the unit conversion for your injectors flow as well?
The max is 254lb/hr .

foff667

iTrader: (2)

LS2 pcm's are hardcoded to 63.5lb/hr, no easy way around it.

Snyper

iTrader: (27)

How are people usually running larger injectors then?

macca_779

Max the table then you have to rely on other factor tables and/or VE/MAF fudging.

Snyper

iTrader: (27)

Im not using a MAF. I applied the 2bar OS. Im having it tuned in open loop completely. Some are saying just simply add say 30% to the ifr vs. volts and that would make the 63.5s 82.5s....

macca_779

Then just do it in the VE.

HUNTER02SS

iTrader: (24)

Oh, I didn't know he was using a LS2 PCM. I would swap to a LS1 PCM. Seems like it would be alot easier to tune with the correct injector size in the table, rather than fudging other tables to get it to work properly?

Snyper

iTrader: (27)

The wiring harness's are completely different.

HUNTER02SS

iTrader: (24)

If you got a LS1 ECU with harness and a extension adapter for your front mount cam sensor you are good to go. The only other thing is if you are using knock sensors, you have to use LS1 knock sensors. At the point you are at though, it may be easier to manipulate the ECU instead of starting over with the wiring.

brianfromhawaii

iTrader: (3)

would not be easier at all! just dick up the VE tables and your fine with 2 bar.... you may go the high 200s but screw it if it runs perfect it runs.

Snyper

iTrader: (27)

Yeah I was told the LS2 ecus dont even look at the IFR vs volts so that doesnt work.

Snyper

iTrader: (27)

I think id have to take away not add....if the injector is bigger and the ecu thinks its a smaller injector it would open and close it the same as a smaller injector but with it being bigger it would dump more fuel...I could be wrong though...

kelp

No you add it. by a factor of 83/(your value).

Slowhawk

iTrader: (12)

Thats a E-40 computer for ya.They have a limit on injector scaling.You have to botch the other #'s. For a project like yours the older 99-04 computers are more tuning friendly.

Snyper

iTrader: (27)

Ehh well im already stuck with it and used up 4 credits to get the SD setup(which doesnt seem worth it)

Frost

iTrader: (45)

Basically... take the [max injector value] / [your new injector size] and then multiply the entire VE by the resulting number (will be less than 1 as you noted).

HOWEVER, in your timing tables now, the same % will need to be applied to cylinder fill. What was 1.0g/cyl will now be the number derived above * cyl air mass. You will have to go back through your main and idle timing tables and any modifying tables as well.

Snyper

iTrader: (27)

this program makes me feel like an idiot. I hate the E40

Frost

iTrader: (45)

I think GM did too. I'm not a big fan myself, but the custom OS makes it workable.

GTO Eric

iTrader: (6)

you can scale the whole tune by 25 or 50%. Their a few threads over on the hp tuners forum showing how to do it.