Throttle Bodies size??

[Cyberbeej]

Originally Posted by Davey

I too went for 38mm throttle bodies for my V6 2.9 Cosworth lump, mainly because they were available cheaply but also because its close to the same CSA as the inlet ports on the heads. The butterflies are close to the 200mm optimum (for road use) from the valves so I anticipate it will be a very tractable power plant from low revs. Personally I really don't get on with peaky high revving motors where all the power is at the top end, I much prefer some good honest low down torque. Torque turns wheels!

D.

Hey davey, can i ask if your using the BOA or BOB engine?

I'm currently building 6 individual butterflies for the BOB (would say throttle body but the injector is in the head) Using 45mm butterflies as the cross sectional area is just slightly over the head port size so as not to cause any restriction and they were also what was available at the time.

I prefer torque over high rpm, hence 2.9 V6 cosworth engine.