Buff_Hatch
Junior Member
Does anyone know the largest throttle plate that will fit a 90 Si Intake manifold?
Will a 68mm work or be too big?
Will a 68mm work or be too big?
Size of Intake
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Buff_Hatch
Junior Member
So I will probably have to port the plenum? So it is not a bolt-on ? But what size are we talking about 66mm or 68mm?
Buff_Hatch
Junior Member
Yes, mostly cyl head work - 11:1 compr, ported exh, ported int, 3-way valve job, 272 degree cam... etc. 4-2-1 header... 2" exhaust all the way back... Still using 240cc injectors though...
youll definitely wanna fix that injector thing (also have it tuned if you havent done that yet).
Putting a bigger throttle body on a stock untouched intake is kinda silly though. As Blanco said, if the throttle body is 68mm (or whatever size you plan on going with), the intake is still 58mm, and will require port matching to notice anything out of the throttlebody.
Putting a bigger throttle body on a stock untouched intake is kinda silly though. As Blanco said, if the throttle body is 68mm (or whatever size you plan on going with), the intake is still 58mm, and will require port matching to notice anything out of the throttlebody.
