C3AE-F Heads

JR 302GT · 08-17-1999, 11:57 PM

I have a set of these heads. They say 289 on them also. Are these 1963 289ci heads? If so, is the combustion chamber size 54.5cc?

Thanks in advance,

John

------------------
Altoona, PA 1993 GT, full MAC exhaust, 3.73, stock ported heads, E-303, ported stock intake, 65mm TB, 75mm Bullet, 24lb injectors.
Best E.T. of 13.48 @ 101.6 w/1.92 60'
Just installed MAC upper/lower control arms, Comp Engineering adjustable drag shocks, and Nitto 245/50-16 Drag Radials
The added suspension/tires really make a difference on the street without heating them, can't wait to get to the track with them.

66fastback · 08-18-1999, 01:41 AM

At first I figured the C3 casting would be a 260 head, but if they have 289 stamped on them, then their 289 heads, and I would ASSUME they have 54cc chambers. I know that some of the earlier cars (before 65) had even smaller chambers than this, but I think they were HiPO heads.

If no one here can give you a definate answer, try posting over at vintage-mustang.com. They have lots of people who are very good sources of early Mustang info...especially the stock stuff. A couple of regulars are MCA judges and really know their cars. If they don't know it, they can sure find out. Are you planning on using these heads on 5.0?

------------------
66 GT Fastback 5.0, 5-speed, cable clutch, JBA's, 3.40 gears, EFI coming soon?

JR 302GT · 08-18-1999, 09:09 AM

Thanks for the info.

I already had them on my 93 5.0L, but took them off to have them done correctly. When they machined them to put the 1.94"/1.60" valves in, they didn't port AT ALL under the seat! Might as well have left the smaller valves in.

But anyways, thanks for the info!

John

Kevin Price · 08-23-1999, 07:00 AM

The chamber size of your head is between 52-55cc. Valve size is 1.78 intake, 1.45 exhaust. You rport sizes are 1.94 x 1.04 intake and 1.24 x 1.00 exhaust

JR 302GT · 08-24-1999, 05:16 PM

Thanks Kevin! The heads now have 1.94"/1.60" valves installed. Except one thing, they didn't do any porting under the seats!! They cut the bigger valves in and the holes underneath are still factory size!! What a job huh?

Thanks again,

John

[This message has been edited by JR 302GT (edited 08-24-1999).]

66fastback · 08-26-1999, 01:40 AM

Yeah, my old 66 heads were done the same way. Seems like a waste of time if you don't recontour the throats. We tried to touch touch them up, and they were better than stock. Still, I eventually got some Windsor Jr.'s and they totally rock. Stomp the old heads with the big valves all through the rpm range.

08-17-1999, 11:57 PM	#1
JR 302GT Registered Member Join Date: Feb 1999 Location: Altoona, PA Posts: 31	C3AE-F Heads I have a set of these heads. They say 289 on them also. Are these 1963 289ci heads? If so, is the combustion chamber size 54.5cc? Thanks in advance, John ------------------ Altoona, PA 1993 GT, full MAC exhaust, 3.73, stock ported heads, E-303, ported stock intake, 65mm TB, 75mm Bullet, 24lb injectors. Best E.T. of 13.48 @ 101.6 w/1.92 60' Just installed MAC upper/lower control arms, Comp Engineering adjustable drag shocks, and Nitto 245/50-16 Drag Radials The added suspension/tires really make a difference on the street without heating them, can't wait to get to the track with them.

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08-18-1999, 01:41 AM	#2
66fastback Registered Member Join Date: Mar 1999 Location: Dallas, TX Posts: 208	At first I figured the C3 casting would be a 260 head, but if they have 289 stamped on them, then their 289 heads, and I would ASSUME they have 54cc chambers. I know that some of the earlier cars (before 65) had even smaller chambers than this, but I think they were HiPO heads. If no one here can give you a definate answer, try posting over at vintage-mustang.com. They have lots of people who are very good sources of early Mustang info...especially the stock stuff. A couple of regulars are MCA judges and really know their cars. If they don't know it, they can sure find out. Are you planning on using these heads on 5.0? ------------------ 66 GT Fastback 5.0, 5-speed, cable clutch, JBA's, 3.40 gears, EFI coming soon?

08-18-1999, 09:09 AM	#3
JR 302GT Registered Member Join Date: Feb 1999 Location: Altoona, PA Posts: 31	Thanks for the info. I already had them on my 93 5.0L, but took them off to have them done correctly. When they machined them to put the 1.94"/1.60" valves in, they didn't port AT ALL under the seat! Might as well have left the smaller valves in. But anyways, thanks for the info! John

08-23-1999, 07:00 AM	#4
Kevin Price Registered Member Join Date: Jan 1999 Location: Oxford, KS Posts: 935	The chamber size of your head is between 52-55cc. Valve size is 1.78 intake, 1.45 exhaust. You rport sizes are 1.94 x 1.04 intake and 1.24 x 1.00 exhaust

08-24-1999, 05:16 PM	#5
JR 302GT Registered Member Join Date: Feb 1999 Location: Altoona, PA Posts: 31	Thanks Kevin! The heads now have 1.94"/1.60" valves installed. Except one thing, they didn't do any porting under the seats!! They cut the bigger valves in and the holes underneath are still factory size!! What a job huh? Thanks again, John [This message has been edited by JR 302GT (edited 08-24-1999).]

08-26-1999, 01:40 AM	#6
66fastback Registered Member Join Date: Mar 1999 Location: Dallas, TX Posts: 208	Yeah, my old 66 heads were done the same way. Seems like a waste of time if you don't recontour the throats. We tried to touch touch them up, and they were better than stock. Still, I eventually got some Windsor Jr.'s and they totally rock. Stomp the old heads with the big valves all through the rpm range.