Stella94GT

When the intake manifolds tb opening is 70mm, do i need to get a 70mm tb? i was going to stick with a 65mm becuase im not planning on any type of forced induction, just h/c/i.

Hamutoff

Its most likely best to match the opening size.
I am going with 65mm because its sized to the 1993 cobra replica on my mild 5.0 build
If my Intake opening was 70mm like many of the after market units out there I would go 70[&:]

If you already have one or can get one of the two sizes for a really good price (a high quality one) get that one

Stella94GT

thanks hamutoff, just lookin for some more feedback. does anyone eles have an answer?

OnyxCobra

It would be fine running a 65mm but if you're planning on a h/c/i you should probably go with a 70mm anyway You usually want to avoid a TB thats larger than the intake b/c then the air is hitting a wall...

gspfunk

The opening diameter has nothing to do w/ what size TB you should run. Just b/c my intake is 70 or 75mm, doesn't mean I should run that size TB. If you have done an H/C/I swap, 70 should be okay. If not, stick w/ the 65mm.

I'm running a set of worked over E7's, E cam, and the TFS street heat intake w/ a 65mm FRPP TB on my rebuilt 306. I'd look at a 70 if I had better heads, but it wouldn't gain me anything w/ my setup.

Stella94GT

ok thanks guys. one more thing, i was going to use a c&l 73m maf system, but if im going with a 70mm tb would it benifit me more to go with the 76mm maf?

Stella94GT

bump

93_five_oh

so you haven't bought a mad yet? i'd go with the 76 mm then...
i don't see why not.
as long as the maf is bigger than the tb you should be good.

Hamutoff

73m maf system, but if im going with a 70mm tb


sounds about perfect

Stella94GT

I havnt order anything yet but over winter im planning on installing the typhoon intake, pp 70mm tb and a c&l 73 maf system. I think im set on the 73mm becuase the 76mm in 100 more so unless anyone can change my mind, in goin with the 73.