Pre-Turbo Tune

[Edub1]

I have my 460cc injectors in and my fuel corrected.

The question is, after I install the turbo, will it be necessary to re-tune my fuel or will the MAF take care of it?

In theory, the MAF should add fuel in proportion to the increased air flow - what do you guys think?

[KATwo40]

What is your tuning system and to what extent have you corrected for the injector size (i.e. SAFC or actual tuning map with modification to the K value?).

Also, are you running stock MAF or Z32? If using the Z32, did you import the VQ scale for it?

[Edub1]

I tuned the eprom for 460cc injectors - modified k, tp & all that. The MAF is stock.

The N/A motor runs great with the 460s and my corrections. I'm just wondering if the addition of the turbo will throw off the fueling or if the MAF will just do its thing.

[SeanC]

it should run fine.

[KATwo40]

The MAF will do it's thing, but you'll likely need some fueling correction while in boost, as the boost AFR will probably need to be lower than the N/A WOT AFR. Yes, 12.5:1 is ideal, but not always perfect for every engine and every setup.

I'd recommend making sure your wideband is handy for the first few testing runs and do some datalogging. That way you can tweak the map where needed.