Picked up an LS6 intake without a throttle body and now I'm trying to figure out which TB I need. Can some of the guys who have used an LS6 intake chime in on which TB you used, did you use LS1 or LS6? I know the LS1 is 78mm and the LS6 is 85mm. My harness has a 5 wire provision for a MAF. Seems all LS6 TB are 5 wire and LS1 3 wire. Can the MAF be eliminated?

Which TB did you use and why?

 

LS1, LS6 both used the same 78mm TB

Trucks use a 5 wire 85mm MAF. Its the same 3 wire MAF as the cars, but incorporates the IAT into the mix for a highly accurate (and larger opening) sensor. LT1/LS1/CPI trucks all use the 75mm 3 wire MAF

The MAF can be deleted with a speed density tune. If you dont have a good reason to run SD, I wouldnt

 

You should just be able to use your old throttle body and maf unless you want to upgrade those as well. If you are planning to get your computer tuned i would use the 85mm maf.

 

I would but the truck TB is DBW and doesn't come with a MAF or I would have reused it

 

So since I'm starting with a truck harness and based on the added accuracy of the IAT reading and larger opening, I should look for the truck MAF? This will bolt in place with either TB?

 

You have to fab an intake tract so using the 4" OD 5 wire MAF vs the 3.5" OD 3 wire MAF is up to you

 

Helpful as always. Thanks!

 

Doesn't hawks carry the 5 to 3 wire converstion harness or visa versa

 

It's possible that they do, but it's not my first choice to buy stuff from. Do they have what you need? Yes...do they have what you need at a reasonable price? No.

I've got the MAF issue handled and will just use the 5 wire and make it work