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  351W open or closed chambers?

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Author Topic:   351W open or closed chambers?
68DARKHORSE
Gearhead

Posts: 272
From: Austin, Tx
Registered: Aug 2002

posted 12-14-2002 12:19 AM     Click Here to See the Profile for 68DARKHORSE     Edit/Delete Message   Reply w/Quote
Can Windsor chambers be identified easily like Clevelands?

I have a pair of D5AE-CA heads with D shaped wedge chambers like the 4V Cleveland.
A guy at a machine shop said they were open chambers, but they don't look like O shaped 2V Clevelands.

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SteveLaRiviere
Administrator

Posts: 30261
From: Saco, Maine
Registered: May 99

posted 12-14-2002 07:51 PM     Click Here to See the Profile for SteveLaRiviere     Edit/Delete Message   Reply w/Quote
If the chambers have a quench area, they're closed chamber heads.

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rm302 boss
Moderator

Posts: 283
From: Austin Texas
Registered: Dec 2002

posted 12-15-2002 11:46 AM     Click Here to See the Profile for rm302 boss     Edit/Delete Message   Reply w/Quote
There are some late model heads that are completely open,and if i can remember right there are two diffrent closed chamber heads out there. D5 is 1975 and the code book showes that you have small chamber 60.4 cc heads. the open chamber are 69.0 cc.

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1970 Boss 302
1990 Taurus SHO
1985 Mustang GT 351W
1995 Land rover Disco
1980 Triumph Spitfire (auto-X car)

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Rustang
Gearhead

Posts: 398
From: Clarion PA
Registered: Nov 2000

posted 12-17-2002 12:47 PM     Click Here to See the Profile for Rustang     Edit/Delete Message   Reply w/Quote
Open chambered windsor heads are tough to tell apart from closed chamber heads at first glance. The difference is the chamber is layed back to about the bore size on the spark plug side of the chamber on windsor smog heads. Early heads like the C9's and D0's have the chamber come very close to the spark plug. In my experience mid 70's castings can be tough to call. I've seen some 302 D2 castings that have a very small chamber. I would suspect the D5 heads would have the large chambers with the spark-plug side of the chamber opened up to the bore as described above.

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68DARKHORSE
Gearhead

Posts: 272
From: Austin, Tx
Registered: Aug 2002

posted 12-17-2002 02:53 PM     Click Here to See the Profile for 68DARKHORSE     Edit/Delete Message   Reply w/Quote
The spark plug side doesn't go out to the bore on these D5AE's. The other night I turned one over and filed one chamber with 30w oil 5cc's at a time. The oil is thick so it was kind of hard to tell when to stop. It seems like 62cc's was about right. Is the volume inside the sparkplug considered when you cc a head or is this normally done with a bolt in place?

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rm302 boss
Moderator

Posts: 283
From: Austin Texas
Registered: Dec 2002

posted 12-18-2002 10:58 AM     Click Here to See the Profile for rm302 boss     Edit/Delete Message   Reply w/Quote
I have a master list of ford part # D5AE-CA is a 60.4 cc head with 1.84/1.54 valves. W/ air injection ports.. Studs are positive stop.. Does this sound right? Production ran from 1975-77.... I hope this helps..
Rene

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1970 Boss 302
1990 Taurus SHO
1985 Mustang GT 351W
1995 Land rover Disco
1980 Triumph Spitfire (auto-X car)

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68DARKHORSE
Gearhead

Posts: 272
From: Austin, Tx
Registered: Aug 2002

posted 12-18-2002 01:05 PM     Click Here to See the Profile for 68DARKHORSE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by rm302 boss:
I have a master list of ford part # D5AE-CA is a 60.4 cc head with 1.84/1.54 valves. W/ air injection ports.. Studs are positive stop.. Does this sound right? Production ran from 1975-77.... I hope this helps..
Rene



That's what I was thinking. I wanted to make sure I didn't post any bad info when I try to sell them.

Thanks everyone,
Alton

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sodi
Journeyman

Posts: 26
From: Kenosha Wi. USA
Registered: Dec 2002

posted 01-05-2003 11:18 AM     Click Here to See the Profile for sodi     Edit/Delete Message   Reply w/Quote
I also cc,d these heads and averaged 58 to 60 but was told the valve size,s are very small and not worth the effort to try and get much HP out of them the Doo,s are much better I was told

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Moneymaker
Administrator

Posts: 18281
From: Lyons, IL, USA
Registered: May 99

posted 01-05-2003 12:12 PM     Click Here to See the Profile for Moneymaker     Edit/Delete Message   Reply w/Quote
1974 and earlier 351W heads use the larger 18mm spark plugs. The 75 and newer castings use 5/8 plugs.

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68DARKHORSE
Gearhead

Posts: 272
From: Austin, Tx
Registered: Aug 2002

posted 01-06-2003 03:10 PM     Click Here to See the Profile for 68DARKHORSE     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by sodi:
I also cc,d these heads and averaged 58 to 60 but was told the valve size,s are very small and not worth the effort to try and get much HP out of them the Doo,s are much better I was told

The valves are the same. The spark plugs in the later castings are not shrouded like the earlier heads. I would think that would make the later heads better once you grind out the humps in the exhaust ports.

[This message has been edited by 68DARKHORSE (edited 01-06-2003).]

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