I found that I was running lean (135+) over my whole load scale, so I lowered the injecter constraint to 20. I am using Tunercat and Craig's software. Now my BLM's are almost steady 140s, I thought by reducing the injector constraint richens the mixture? Maybe I don't inderstand what Craig's software calls blm coarse and blm fine? But I did find that at 170 load I was at 128 128. But at lower load I was 140ish. I think I am going to keep my fuel constrant and pulls some fuel out at the lower loads.

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1988 L98
Vette Heads/no EGR
SLP Headers/Y-Pipe
ARAP bin

 

Yes, by lowering the fuel injector constant it sould bring down the blms. You lowered the constant to 20 from what? Just wondering how much you changed it by.I just aimed for getting the majority of the blms at 128 with the injector constant before tweaking individual areas. As for Craigs software-sorry can't help as I'm using diacom. Hope this helps some.


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86 406

 

As Driveit said, lowering the injector constant (without changing your injectors) will richen the mixture.

Sounds like your MAF Scalar Tables are off if you are are going lean at lower load ranges but fine at higher load ranges (provided you are not in PE...which ALWAYS shows 128/128).

 

I changed my injector constraint from 22.5 to 20. I also forgot to say that the air temp outside was a bit cooler. I have no egr and I have done the tb bypass, AT sensor was reading about 89*. This may explain it?? The MAP tables look a little tricky to mess with, what is the differece in the table numbers?

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1988 L98
Vette Heads/no EGR
SLP Headers/Y-Pipe
ARAP bin