Throttle Body Size, Can It Be To Big?

[boostn32]

Im fabricating a new plenum for my RB20, i was thinking a 80mm or 90mm tb, will this be to big.

power will be up around 500hp at the engine. what are your thoughts.

also can the plenum be too big, im thinking around 4 litre in volume.

Thanks Luke

[The Dan]

Im fabricating a new plenum for my RB20, i was thinking a 80mm or 90mm tb, will this be to big.

power will be up around 500hp at the engine. what are your thoughts.

also can the plenum be too big, im thinking around 4 litre in volume.

Thanks Luke

Standard Tbody will suffice

[boostn32]

i thought it would of been a restriction.

[CycoCity]

I dont think there would be anything wrong with running a 75/80mm TB.

[bubba]

Have seen 365rwkw through a standard RB20 throttlebody.

There is also no point in having a throttle body that is bigger than your cooler piping.

Really large throttlebodies can result in drivability and tuning issues.

Edited September 1, 2010 by bubba