wondering what throttle body to use on the 20b. the 20b tb or the fd tb. im using the stock 20b intake manifold so i dont know if the fd tb will match up. Any suggestions.??? thanks

 

They seemed to be the exxact same size if I remember correctly, but I'm sure Reted will let you know for sure.

 

Im running a 90mm accufab.

 

Im running a 100mm accufab.

I have also used a FD TB on a std 20b manifold, I just had to block off the bottom port in the manifold.

 

The fd and 20b tb's have the same bore size and bolt pattern.
The only real difference is that the 20b has the second set of secondary butterflies like a TII tb when the fd tb has only one set.
If you use the 20b tb, it is a good and simple upgrade to remove the second set.

 

90MM infiniti Q45 TB...its massive.

neil

 

I'm using a single plate 90mm accufab

 

For the guys that use the Accufab throttle body's do you open up the plenum or leave it alone? Any pictures if possible?

 

I have opened mine up.

 

Mine is completly gutted. All we have to do is have the bottom section of the plenum welded back on.


-Destin

 

I cut mine thru the middle & welded on a square to round to suit the TB & the manifold. Will post pics when I remember!

 

Mine is all gutted out. I will see if I have any pics, if not, I will try to remember to take my digital cam to the shop.

 

i am using holley 4" TB

 

BUMP! Anyone have pics of their plenums?

 

Here's a pic of one i've been working on. It needs to be smoothed up a little and the bottom half put back on. My roommate is going to use it now. I decided to ditch the q45 tb and modified plenum.

-Destin

 

good girl!! That plenum still needs a bit of work to make it useable. Just gotta smooth the edges out and re weld and its good to go.


neil

 

lookin good!

 

I know this is an old thread, but trying to decide what TB to go with.

Those running the Accufab 90mm TB, assuming its the Ford.

What part number are you using?

What modifications did you do to make it work?

Thanks for any help

 

Its single valve 90mm infiniti Q45 TB can it work with to 20b intake manifold?

 

It needs an adaptor in between the throttle body and manifold.

 

Is the 90mm Accufab actually 90mm at the plate? Because as far as I know, the Q45 is 90mm at the inlet only. Still not a bad choice in TB's though.