What do you all know about the C3AE 289 heads? Once I know a bit about these, how do you guys figure they will work on a Windsor? I'm trying to figure out how they will flow and what kind of CR I will get with a '94 W block (unrelated to the post on the one I'm rebuilding) but it might be fuel injected still.

 

there probably is not that much difference in the flow of the heads,i think the windsor heads would be a better choice for a truck,another thing is if your staying with EFI and all the pollution you are going to have a prob. with the 289 heads,they dont have the hole on the back of the head for your pollution tube to bolt to!

 

What pollution tube? There aren't any on this engine, the only tubes that come off it for smog are the ones on the rear of the exhaust manifolds (for smog pump) and the one on the front that goes from the right manifold to the egr valve. The smog pump seems to have seized up on me now too, its only been off the engine for like 2 days and its seized. Also, with the speed density system, is there any way to bypass the smog pump and not have a check engine light?

 

The earlier heads won't have the air injection bumps in the exhaust ports so the egr won't work properly.

 

Oh ok. So now how much of the egr can I get rid of? I don't have emmissions and never will so I don't want it if I can get by without it.

 

www.fordfuelinjection.com
egr eliminator resisitor

 

egr and air injection are two totaly different things. egr picks up exhaust from the exhaust manifold, it travels through a tube from the manifold to the egr valve, and into the intake (when the computer calls for it) the exhaust provides an inert gas to cool the combustion chambers. its only used at cruising speed at part throttle. when the computer knows this is all working correctly it can lean out the mixture even more for better economy without the risk of pinging due to higher cylinder tempatures. remember this only happens at part throttle cruise, so its not costing any horse power just giving you a tiny milage increase. when i did the injection conversion on my truck i wanted to use the egr, but since i ditched the stock manifolds for headers there was nowhere to hook the egr tube to, so i extended the tube and welded it into the header collecter. air injection is basicly a belt drivin air pump pumping fresh air into the exhasut stream. the freash air hits the hot unburned fuel in the exhaust and burns it off. the air has to be injected into the exhaust stream as close to the exhaust valve as possible so it can reach the unburned fuel while it is still hot enough to burn. ford had two ways of doing this on their truck motors, some had the air blown in a hole in the back of the head, from there it flowed through pasageways in the head and into the exhaust port. fords other system (way more ugly plumbing) was to blow the air into the exuahust manifold at 4 points one after each cylinder. so basicly if you can keep your egr no problem, if you keep the stock manifolds you wont have to do anything fancy, if you want headers youll have to fab up a pipe. as for the air injection you can use that to, as long as you use newer heads, or stock manifolds with the piping, or just ditch the air system cause it doesnt do anything for ya just makes the hippies happy

 

Well, air pump is seized, so anyone have any #s for a belt to bypass it? Also I can just leave the egr valve I suppose. As for the 2 tubes that used to be hooked to the air pump (1 on each of the rear of the manifdlds) I can probly just run a hose across between them or better yet i guess I can find plugs for the ports. I just want to be sure it won't bother the computer.

 

you can remove all that but leave the egr hooked up.

 

Ok, sounds good. No #s for a belt though? Or is there an idler pulley that would have to go there?

 

best thing to do for a belt is to cut your current one you have and then measure aprox what you need and take that to the parts store. they should be able to find one for you.

 

not sure if the 63 are the same as the 64 up 289 heads, but if they are.....

these heads flow very similar to e7 and e5 heads. have a low 50's cc combustion chamber giving approx 10:1 cr. decent head that have good potential, but that will cost too much money. better off with a used gt40 head for about 400 bucks ready to install.

the downwall to these heads is they were made for leaded gas and require hardened exhaust seats for daily use and for perfomance will need srew in studs instead of the pressed in. since they are so old they will more than likely need springs for whatever type of cam (roller, non roller, etc..) valves and valve job.

when all is said and done you would have spent more then you would have on a gt40 or e7 head.

for this reason im not a fan of these or c9 or d0 351 heads unless you get them cheap and ready to go.

 

True, I'll just leave well enough alone then. As for cutting the belt, I could do that as it has to be replaced anyway.