American Motors Cylinder Heads

Davey Summa · 03-12-2010, 04:29 PM

Just was wondering....

Any info on { modified stock rules} how good can you get a set of dog leg 448 8895 heads to flow?

Davey Summa
Summa Performance
724-336-2785

Tom Goldman · 03-12-2010, 05:01 PM

The 4488895 casting was a service replacement for the 3196291 '70 360"-390" motors. ....It has a slightly stronger casting at the 90 deg machined areas at the end exhaust ports . ....I was replacing them on cars under warrenty back then because that area was prone to cracking .......This is an excellent head with very little work. ...I used many of them back in the mid '70s for my B/SM Javelin and other bracket motors. .....I have a heavily ported set on the shelf , they were as fast as some of the new ported aluminum heads ,but we got a little thin on the exhaust roof ,and the engine tends to run a little too hot .................Tom

gmonde · 03-12-2010, 08:21 PM

tom: its funny that the 993 heads are in the nhra web site for alternate heads for the 291c in stock ,theres no mention of the 895 head is it close to the same chamber size????
gmondeperformance

Tom Goldman · 03-13-2010, 12:08 AM

There are many reasons for some of the discrepencies in the casting #'s over the years . .....The problem is that there is little in the way of documentation to support some of the odd casting #'s that exist . .......I've got a few castings that the #'s dont appear anywhere in either NHRA specs or anywhere else for that matter. .....I think there are at least 3 versions of the 291 casting alone...........some AMC sites state that the 291 casting came after the 895 in '70 production, altho I distinctly remember getting the 895's as replacements back in the early to mid '70's. ......Tom

03-12-2010, 04:29 PM	#1
Davey Summa Member Join Date: Jun 2007 Location: Enon Valley, Pa Posts: 102 Likes: 0 Liked 1 Time in 1 Post	American Motors Cylinder Heads Just was wondering.... Any info on { modified stock rules} how good can you get a set of dog leg 448 8895 heads to flow? Davey Summa Summa Performance 724-336-2785

03-12-2010, 05:01 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,476 Likes: 889 Liked 882 Times in 236 Posts	Re: American Motors Cylinder Heads The 4488895 casting was a service replacement for the 3196291 '70 360"-390" motors. ....It has a slightly stronger casting at the 90 deg machined areas at the end exhaust ports . ....I was replacing them on cars under warrenty back then because that area was prone to cracking .......This is an excellent head with very little work. ...I used many of them back in the mid '70s for my B/SM Javelin and other bracket motors. .....I have a heavily ported set on the shelf , they were as fast as some of the new ported aluminum heads ,but we got a little thin on the exhaust roof ,and the engine tends to run a little too hot .................Tom __________________ Tom Goldman 1500 SG , 1506 STK

03-12-2010, 08:21 PM	#3
gmonde Senior Member Join Date: Nov 2007 Posts: 615 Likes: 56 Liked 165 Times in 59 Posts	Re: American Motors Cylinder Heads tom: its funny that the 993 heads are in the nhra web site for alternate heads for the 291c in stock ,theres no mention of the 895 head is it close to the same chamber size???? gmondeperformance

03-13-2010, 12:08 AM	#4
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,476 Likes: 889 Liked 882 Times in 236 Posts	Re: American Motors Cylinder Heads There are many reasons for some of the discrepencies in the casting #'s over the years . .....The problem is that there is little in the way of documentation to support some of the odd casting #'s that exist . .......I've got a few castings that the #'s dont appear anywhere in either NHRA specs or anywhere else for that matter. .....I think there are at least 3 versions of the 291 casting alone...........some AMC sites state that the 291 casting came after the 895 in '70 production, altho I distinctly remember getting the 895's as replacements back in the early to mid '70's. ......Tom __________________ Tom Goldman 1500 SG , 1506 STK