LML maf rescale

[Jakezed22]

Just finishing up the intake for my lml swap. The new pipe diameter where the maf goes is 4 inches and I believe the original was 4.5 or maybe 5?

Do I just need to re scale the maf tables in efi to accommodate this?

 

[2004LB7]

I thought stock was 4 inches

 

[Jakezed22]

I thought stock was 4 inches

Maybe it is, I don't have a truck here to compare to. On Sunday I'll be around a buddy's 12 lml, I'll measure it to check.

 

[2004LB7]

I guess to answer your question more directly. if the dimensions of the intake where the MAF samples the air deviate from stock the MAF will need to be rescaled

 

[JoshH]

Fully warmed up LMLs at stock idle speed (with no EGR active), I usually see around 30-35 g/sec at idle. If you do a proportional scale to get your MAF rate there, it should be close enough.