is a 75mm t/b too big for my setup?

[yellow1995Cobra]

i am 80 mm at the mass air, 76.2 mm (3" interior diameter PVC) at the intake pipe. i think a 75 mm throttle body matches.

You still dont get it, INTAKE MANIFOLD, the inlet of that IS NOT 75 MM.

 

[Grn92LX]

TFS street intake has a 75mm opening

 

[yellow1995Cobra]

TFS street intake has a 75mm opening

I stand corrected.

but the94/95 elbow?

 

[BlackVert]

You still dont get it, INTAKE MANIFOLD, the inlet of that IS NOT 75 MM.

ok ... now i'm with you. actually, the inlet of my intake manifold is 75 mm.

http://www.trickflow.com/product/prfeature_index.htm

mine is this one: TFS-51500001. the throttle body inlet diameter is 75 mm.

the elbow adapter i have is the MAC 70 mm. is that 5 mm crucial?

it seems to me that, if anything, i should get a 75 mm adapter and a 75 mm t/b. then everything would match up more closely.

but i'm curious, why would it HURT to have a 75mm t/b with a smaller elbow? how is that different from having a bigger (76.2 mm) cai tube and a smaller t/b? won't it just flow whatever the smallest (ie-most restrictive) opening will allow?

 

[Grn92LX]

Aren't the sn95 elbow made in 70 and 75mm? I think the tfs one is 75mm, just buy that one so it all flows. If you bolt a 75mm tb to a 70mm elbow, I would assume the air would hit a "wall" kinda and hinder flow. Probably nothing you'll notice, but if you want the full benefit of the 75mm TB, you need a 75mm elbow and 75mm inlet of the manifold. Glad I dont have these elbow thingy's on my 92LX

 

[GTJake]

Glad I dont have these elbow thingy's on my 92LX

Me too...

Jake

 

[rgreathouse]

i have a bbk/edelbrock 75 mm tb if anyone wants it.