Best Throttle Body Size for Supercharged Fox

[Dbark4895]

Looking for some advise for the most recommended TB and MAF setup. I currently have the

Deatsch Werks injectors 550cc
XL3F-12B579-AA 90mm MAF
BBK Powerplus 70mm TB

I’m thinking I need to upgrade the TB, but not sure what size is the best.

 

[Monkeybutt2000]

Idk how much more it would help,but if you want to spend some $ get an Accufab TB.

 

[Dbark4895]

Idk how much more it would help,but if you want to spend some $ get an Accufab TB.

Yeah that’s what I want to get, but I’m not sure what size is the best for the MAF I have.

 

[foxbodybill89]

Accufab has flow numbers on their website, find an engine CFM calculator online and plug your specs in and compare. Will mostly be dictated by displacement, the S/C will improve volumetric efficiency so you can be a little undersize and still make the power. Will also help to have an idea what HP you expect out of the engine. You do want to taper down from the MAF size generally but with the S/C you're also not worried about creating velocity. 90mm is a pretty big TB so you'll probably be smaller than the MAF anyway.

 

[Bullitt347]

For a blow through it does not matter as much. Everything is pressurized before the TB.
If using a PD blower, then the larger the TB the better.

 

[foxbodybill89]

For a blow through it does not matter as much. Everything is pressurized before the TB.
If using a PD blower, then the larger the TB the better

I agree, though OP has not said if it's a race or street car. A smaller TB would reduce the throttle sensitivity and make it a little more streetable without giving up overall power.

 

[96pushrod]

If the 70mm tb is the same size or bigger than the blower outlet, I’d just leave it.