Throttle Bodies size??

[baz-r]

as a rule there is no point in going for anything more than the head can flow and as for all engine mods for road use you dont want to go too silly oversizeing things
thats why im useing 38mm on my 1800 zetec as i want better midrange power and im been realistic with a 135-145bhp figure in mind

[monsterob]

I too Have picked 38mm bodies as they were cheaper than all the larger ones easier to space for my application and looked brand new. 4x38mm has got to be way better than one 62mm. Will post some piccys of my manifold once it's done it's all there just needs bending and welding now for the runners and the injector seats making.

[monsterob]

Had a play today .

http://s140.photobucket.com/albums/r...er_media_share

http://s140.photobucket.com/albums/r...er_media_share

Just got to join them and extend the butterfly link arms and refit the original omega fuel rail once I've made/ fitted new injector seats not bad for an afternoons playing ( had to tidy the workshop up first it was a right tip !)

[tkpm]

I can't links to work.


Terry

[robo]

http://i1116.photobucket.com/albums/...s/100_0704.jpg

http://i1116.photobucket.com/albums/...s/100_0703.jpg

These are the ones i got for mine and they still fit under the bonnet without a scoop .Mind I suppose it will have to have one to let some cold air in.

Bob

[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.

[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.