MoparFins

Techical Discussions => Tech- - Engine => Topic started by: mike on March 14, 2012, 08:49:33 AM

Title: Plymouth 277 Need Some info
Post by: mike on March 14, 2012, 08:49:33 AM


got 56 plymouth belvedere with i believe the 277 v8. id like to know more about this engine. I only know thats its the A-family poly. Also where is the block identification numbers? and how do i decode them. From what i can see online is this engine has little  to no add on's and seems to be one of its own. Thanks
Title: Plymouth 277 Need Some info
Post by: Guests on March 14, 2012, 09:08:44 AM
The poly engines (A engines) were just changed bore and stroke engines, and there are several that were the same. There is information out there, try reading allpar.com under the engines section, some info there. What are you trying to find out about the engine? When you say add on's, what exactly are you talking about or wanting to know?
Title: Plymouth 277 Need Some info
Post by: mike on March 14, 2012, 09:25:56 AM

i just didnt know about switching to a 4 bbl intake/headers light performance i gess. Also will any other poly motor part interchange.
Title: Plymouth 277 Need Some info
Post by: Guests on March 14, 2012, 02:38:20 PM
Poly, yes, Hemi, only if the heads and pistons are swapped. You can get a lot of information from the site I mentioned, online about the Poly and A engines (matching components), and gasket sets. It is kind of like the small block Chevy, 265 through 400 cubic inches with very few exceptions with bolt-ons. Read up on the history of the engine a little bit and you will find there is actually more out there that swaps than you might think.
Title: Plymouth 277 Need Some info
Post by: firedome on March 16, 2012, 05:55:41 AM
The 277 A poly was completely different from the earlier bigger 301/325/331/354 etc polys, which were poly heads adapted to the hemi block. The 277 A poly was a new low-cost engine starting with a clean sheet of paper design brought out exclusively for high volume production needed for Plymouth. It actually has more interchangeable parts with LA engines than with earlier polys. There's a list someplace for A to LA interchange, will look.


Title: Plymouth 277 Need Some info
Post by: Snotty on March 17, 2012, 11:35:18 AM

Quote from: firedome
The 277 A poly was completely different from the earlier bigger 301/325/331/354 etc polys, which were poly heads adapted to the hemi block. The 277 A poly was a new low-cost engine starting with a clean sheet of paper design brought out exclusively for high volume production needed for Plymouth. It actually has more interchangeable parts with LA engines than with earlier polys. There's a list someplace for A to LA interchange, will look.


Just curious... is the 277, then, the first A motor?  I know nothing about these old motors.
Title: Plymouth 277 Need Some info
Post by: Guests on March 17, 2012, 03:09:44 PM
It was the first of the A motors, here is a link to some history/dimensions of the A engines.
 
http://www.allpar.com/mopar/a-engines.html (http://www.allpar.com/mopar/a-engines.html)
Title: Plymouth 277 Need Some info
Post by: firedome on March 18, 2012, 06:03:44 AM


Early Chrysler V8s can be confusing as h*ll... for example Windsor had
a 301 poly in '55, which is not the same engine as the Plymouth 301 or
318 in '57 (which were a punched out 277 A). Plymouth had 241, 260, 270
"early" polys, then the 277 A which came out in '56 as an all new
engine, which beacme a 301 and the 318 made up until '66 ('67 in
Canada). Chrysler polys were 301 ('55) 331 ('56) and 354 ('57.58)
DeSoto never had their own "early" poly, all DeS had their own hemis
(276, 331, 345, and the 331 DeSoto hemis was NOT the same hemi as the
Chrysler 331 hemi)  except for the '57 Firesweep which had the
Dodge 325
poly, in '58 DeSoto was all wedge B block (350,361).  The Dodge
Red Ram hemi was 241, 270, 315,  for '57 Dodge got a 325 poly, and
the D-500
got the Chrysler 354 poly!  The '58 325 was a poly, the '59 326 was a B wedge. So, are we confused yet?  I know I
am. Oy!


firedome2012-03-18 10:16:27
Title: Plymouth 277 Need Some info
Post by: Snotty on March 19, 2012, 10:31:24 AM
According to the link Ed posted (good one, by the way!) the '59 326 was an A motor.  To my knowledge the smallest B was 350 cubes.

Then you see something that makes you scratch your head - Mercury had a 383!  Sheesh!
Title: Plymouth 277 Need Some info
Post by: Guests on March 19, 2012, 10:43:07 AM
Ford had a 361, too. It was a truck FE engine. It seemed they were all searching for the elusive 340 size bore and stroke that put out power naturally. Cadillac went all the way up to 500 cubic inches which is still the largest cubic inch per pound weight for the size. And yes, 350 was the smallest RB block.
Title: Plymouth 277 Need Some info
Post by: Steve on March 19, 2012, 04:56:11 PM


I'm just taking all this in
Title: Plymouth 277 Need Some info
Post by: Snotty on March 20, 2012, 10:26:45 AM

Quote from: dana44
Ford had a 361, too.




(http://www.moparfins.com/forum/smileys/smiley2.gif)


Ooops - AMC and Buick had 401s - same conditions....
Title: Plymouth 277 Need Some info
Post by: firedome on March 21, 2012, 07:43:14 AM

You're right on the 326 Scott, it was an A, an oddball 1 yr only, the next year it was a 318 like Plymouth, and the 350 in my old Sweep was the smallest B, I knew that but... well, you know.


firedome2012-03-21 11:44:16
Title: Plymouth 277 Need Some info
Post by: Snotty on March 21, 2012, 11:51:44 AM
I was only citing the link.  Honestly, other than the Pontiac motor I had never heard of the 326.  I knew there was a 325.  Very confusing, indeed!