Hey all, its official - I've been a dummy!

I've been out and mapped my car pretty close - just ironing out some idle/cold start issues. When searching for a good bin to start with or one that would run I tried many different bins, it looks as if I've forgotten to change the Injector constant on the one i went for!

DOH!!!!!

Is all my hard work lost or can I change the injector constant and then add the difference to the VE tables? IE 22lb to 30lb is 36% - Can i just add that to the VE? Or does it not work like that?

If that was to work would I need to adjust other tables as well? PE, Cold Start etc?

Dan

 

You should be able to get away with changing the flow rate constant, and increasing the VE by a constant multiplier (multiply all VE by 1.364). That should be all that's really needed. PE and open loop stuff won't be affected and will work correctly.

Is your VE looking pretty small as it is now?

It's not 100% necessary to actually fix the problem, though, but if you plan to make changes in the future, it's always good to have it set up to match the actual system.

 

The VE is going to become pretty high within the upper tables. I just thought that it was something that I should try and get right. I will have a look at the exact figures and see what they'll end up being.

I'm trying to tune out the cam a bit more atm as I've just swapped in a Manual in place of the 700r4 that was in there originally. I guess it was never loaded up in the lower revs like it is now.

Would be nice to get rid of the Chug, Chug feeling. Above 1600 RPM all is fine but that not helping MPG

 

I agree with RednGold, It's not 100% necessary to change that. I have 30lb injectors and my injector constant is set at 15(maybe 14, can't remember)

The reason for this if my MAF sensor(just the guts) is now in a 4" tube and flow way more than it shows. I increased the scalar tables which in turn increased the MAF tables causing the MAF tables to max out at 255 way too soon. I set it all back like it was and started cutting the injector constant until I got the idle and low RMS right then when from there.

Its been said that an ECM only collects numbers and does the math that its told to do by the chip. What do I care if it multiplies a large number by a small number or a small number by a large number as long as the end result correct.

Just my

Dewayne

 

If I do this change and add the percentage to the VE than a lot of my tables are going to be maxed at the top end.

This could well account for why I'm only running a very low PE change - its 7% I beleive rather than the 20 odd thats standard.

Any advantage to either way?