85 or 90 mm TB??

[Chris]

I'm just looking to squeeze what I can out of it. Had everything to do the 6.0 swap but the guy fried the donor engine. He put a LS7 in his truck. So doing this will get me by until I supercharge and do a built 4L60 or a 4L80

 

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[Gurrzt]

If you are going to a larger throttle body, you will need to adjust your A/F ratio even if you keep the stock MAF, which should be replaced with the corresponding unit for that throttle body.

[BlackZ71Silverado]

Is replacing the MAF really necessary? They are good for upwards of 500HP.

 

 

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[Gurrzt]

Is replacing the MAF really necessary? They are good for upwards of 500HP.

 

 

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This is true, however ask yourself, " will my stock MAF allow enough air to pass through to the bigger throttle body?", "is the stock MAF screened?" The stock MAF is designed to work with the stock throttle body and intake manifold, it MAY not be correct for a bigger unit throttle body.

 

If you want a noticable difference in performance, have a 3600 stall with a 2.5 str installed and get a tune, this one change alone will make a tremendous difference in the vehicle.

[Jennabear]

I wouldn't bother swapping it, the bang for the buck is minimal. If you go to FI, then maybe, but even then, not really worth it on your truck IMO.