Picking the perfect Throttle Body

jopes

New Member
Apr 28, 2005
5
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cali
This is not going into a Mustang nor on a 5.0 engine. History time. I have a 78 Bronco with a 400 bored to 408 ci, ~ 375 hp with the current build in it. I am currently getting my intake machined for 5.0 fuel rails. The engine has decent cam, with the rev limiter set to 5400 for now but future upgrades might raise that up higher than it is now.

I will be using a 90-93 Mass air setup from a 5.0 mustang. I just need a little helping hand on a few parts in the mix to ensure my toy a long happy life down the road.

Throttle body size?
Mass Air meter size?
24 lb or 30 lb injectors?

Engine will probably get a over haul in like 3 years and be build with a little more cam, more compression and there is always the idea of spraying the engine with some go juice. :)
 
so 75mm Throttle body with a 80mm Mass air. What happens if I do not like the 75mm Throttle body and want to drop to a 70mm. Will I have to decrease the Mass air meter size or will it be ok?
 
Ranchero5.0 said:
Ditto the above, what about the distributor? Never played with a 400 except to junk out. With a 351w dist fit? That's the only other hang up I can see for you.

Jamie


poohy, I missed that one. 460 dizzy with the TFI on it.
 
My next engine might be poked and stroked to 440 ci. Would the same setup still support the few extra cubes or would I have to make a set up in Mass air and Throttle body?