Early Windsor Heads On EFI Engines - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

bartaxr8 · 12-07-2004, 00:25

G'Day all, I have a couple of questions regaeding early, i.e 1960's, Windsor cylinder heads. I currently own a 1998 XHII XR8 ute which has the awful E7 heads on it. We currently have a quite a few sets of 289 and early 302 Windsor heads laying around and I was going to build up a set of these early heads, get the exhaust vale seats done for unleaded, get them ported by a machine shop in Melbourne's south east that we know and buy some roller rockers for them. These early cylinder heads have the same sized valves as the GT-40p's but the one main advantage I can see is that the early heads have smaller sized combustion chambers. My ute currently has 9.0:1 compression ratio, with early 302 heads it would come up to about 9.8/9.9:1. With 289 heads it would go up to about 10.25:1. Now my question, will these early heads bolt up to my EFI engine????? I always run Mobil 98 octane fuel in my ute so if they bolt up I think it might be a good way to grt rid of the horrible E7's as well as giving the old ute a bit more get up and go. Anybodys opinion and thoughts on this matter are more than welcome and I look foward to hearing your responses.
Thanks for your time.

xpc66 · 12-07-2004, 01:10

The '67 289 and '70 302 heads I have are the same sized valves as the E7. Have smaller ports too.

The 289 2V and 4V heads are 54.5 cc
The pre '73 302 2V are 63cc and 4V 53.5

Thunder Kiss · 12-07-2004, 02:35

I've got late model heads on my early block, so I can't see why it wouldn't work (especially since you're upgrading to roller rockers).

bartaxr8 · 12-07-2004, 02:55

I see your point, if it works on way, then why not the other. Does anybody know what size valves the E7's have? Maybe the spec I've got for them is wrong (I cant find the bloody piece of paper I had it written on).

barry_v · 12-07-2004, 03:24

1.78/1.46

and if you need any others...
http://home.isoa.net/~mharrisj/fordhead.html

xpc66 · 12-07-2004, 13:24

I think I lied. The 289 has 1.67" inlet and 1.45" exhaust. The HP289 from '64 had the 1.78" and 1.45".

Why not do what I'm doing with the E7 on '70 block :- put 351W valves in, a better cam and clean up the ports?

bartaxr8 · 12-07-2004, 13:41

Sounds like that might be the way to go mate. I just might buy a set of
GT-40's or just put bigger valves and port out the E7's, with roller rockers and a decent cam. At least this is a proven, hassle free method. Thanks.

Bluepower · 12-07-2004, 14:49

The spark plug location will also hurt the burn, designed for a narrow lobe separation camshaft, not a wider EFI profile.

Chris

ebxr8240 · 12-07-2004, 16:07

Quote:

Originally Posted by Bluepower

The spark plug location will also hurt the burn, designed for a narrow lobe separation camshaft, not a wider EFI profile.

Chris

Hmmm ??? Most efi hi po cams are 112 or 110 lob seperation???They where designed by SVO/ SVT Fords own...

Are you meaning fast burn tech ??? Yes the latter heads had higher swirl to prevent detonation and run better on unleaded/ lower ron fuels..One of the reasons the GT"P" head was produced for the lower end engines...