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MORE POLY HEADERS-never installed
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60 dart
Posted 2004-03-29 11:17 AM (#3290)
Subject: MORE POLY HEADERS-never installed



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ebay item # 2470207919------these would be a good set to copy------later
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Daven Anderson
Posted 2004-03-29 3:38 PM (#3303 - in reply to #3290)
Subject: RE: MORE POLY HEADERS-never installed



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They're NOT the most efficient flowing-design even by block-hugger standards,
(look at those 2-into 1's for the front 4 cylinders, and why do the collectors go
straight down?!), BUT those would beat log manifolds for sure
Most block huggers nowadays are true 4-into-1 and equal lengths of pipe...



(Poly Headers.jpg)



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Attachments Poly Headers.jpg (16KB - 107 downloads)
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Bugman
Posted 2004-03-29 3:40 PM (#3304 - in reply to #3290)
Subject: RE: MORE POLY HEADERS-never installed



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Those look kinda hokey-ass with the 1st pipe joining the second like that. That's not much better than stock, while the other 2 have a high flow pipe. You would either have the front 2 running rich, or the rear 2 running lean. And like that last set, for the cost, you could buy a pipe bender and have some flanges laser cut for you.

Bender: $69.99 on sale at harbor freight
Laser cut flanges: $30 from your local guy(in the yellow pages)
Mock the pipes up, and have a muffler shop weld'em for you if you don't have a welder

Then you can make another set and sell'em and get your investment back.
Then make another set, and get some profit.
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Bugman
Posted 2004-03-29 3:41 PM (#3305 - in reply to #3304)
Subject: RE: MORE POLY HEADERS-never installed



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And there's no bracket on those for the generator/alternator

-Jeff
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Daven Anderson
Posted 2004-03-29 3:47 PM (#3306 - in reply to #3304)
Subject: RE: MORE POLY HEADERS-never installed



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Well, stock log manifolds have the same problem as these headers (uneven exhaust exiting),
these look like they were made for easy installation for a specific chassis, rather than optimal flow!
Most headers for street cars in the 1950's-early '60's were made like this, not for optimal flow.
They're interesting as vintage pieces, but really you wouldn't want to copy this design if you're
after the best performance....

Edited by Daven Anderson 2004-03-29 3:49 PM
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Daven Anderson
Posted 2004-03-29 3:53 PM (#3307 - in reply to #3305)
Subject: RE: MORE POLY HEADERS-never installed



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Alternators '61 up have their own direct-to-engine brackets and are not supported by the right-side
exhaust pipe like the DC generators were. So yes that dates these headers' intended application(s)
as 1961-up! Good catch, Jeff! I have pictures of pre-61 Hedman poly headers that have the generator
bracket on the right side header...

Edited by Daven Anderson 2004-03-29 3:54 PM
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60 dart
Posted 2004-03-29 4:03 PM (#3308 - in reply to #3307)
Subject: RE: MORE POLY HEADERS-never installed



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HEY DAVEN------could you post those HEDMAN photos------i'd really like to see them------if it ain't too much trouble------later
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60 dart
Posted 2004-03-29 4:45 PM (#3311 - in reply to #3290)
Subject: RE: MORE POLY HEADERS-never installed



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i think MAYBE the reasoning behind the front tube is to get the heat away from the front motor mount------and easier installation of bolts------as with the balengers i have-you can't use the stock mount heat shields-and front bottom bolt is hell to get to-even with front sheet metal off-----as for the two into one-still better than log manifolds------the tube lengths-i have found that it all depends on who you talk to------some say-for street use-same length doesn't matter------just thought some one might want them------one more thought-why couldn't you use a top mount gen. bracket to intake manifold or go to 61 up heads------most just want the header LOOK any way------
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gradford
Posted 2018-07-10 1:48 PM (#566410 - in reply to #3290)
Subject: RE: MORE POLY HEADERS-never installed


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Does anyone have a suggestion for fabricating shorty headers for a 56 Plymouth's 277 poly? I see that others such as Chrysler Hemi, some Ford SB, and Gen 3 Hemis have similar exhaust port spacing, but need to know if someone has actually adapted any of these using a Poly flange welded on...

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Powerflite
Posted 2018-07-10 10:35 PM (#566443 - in reply to #3290)
Subject: Re: MORE POLY HEADERS-never installed



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This is a really old thread. Good for you for being resourceful and digging it up! I believe that TTI still makes an "A" motor poly header for the '62-'66 crowd. You should check that one out to see if it will work in the '56, and how many mods it would require to put it there. Personally, I would probably just purcahse a set (without the expensive coating so you can modify them) and see what I could do with them. The right side looks like they may be a bolt-in deal with little to no mods required. The left probably will need some massage work around the steering box.
http://www.ttiexhaust.com/MoparClassics-Headers/318poly/TTi318.htm

But, if you do end up needing to make one fully custom, I suggest you find a header that looks similar to what you want to make. A straight dump like what is shown necessitates routing it under the steering. I would get one that angles it back instead so you can avoid doing that. Also get one that routes that forward pipe upward a bit like what is shown with the TTI. It will need that to clear the A-arms and steering box. Then modify them to make them work. The closer what you start with is to being what you need, the easier the task will be. You can also play with header legos to find out exactly what you want ahead of time, and help you to create it from scratch if necessary.

Edited by Powerflite 2018-07-10 10:38 PM
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Powerflite
Posted 2018-07-10 10:39 PM (#566444 - in reply to #3290)
Subject: Re: MORE POLY HEADERS-never installed



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Also, look up Gary Pavlovich on facebook. He has a mean poly stroker in a '56 Plymouth. I'm sure he knows a lot more about what will and won't work in there.
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gradford
Posted 2018-07-11 11:30 AM (#566465 - in reply to #566444)
Subject: Re: MORE POLY HEADERS-never installed


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I talked to Gary Pavlovich yesterday; he suggested either Ford truck 390 headers or Chev LS headers.
I already tried 392 Hemi shorties, with poly flanges welded on, but they were not compatible with the 56 engine compartment, steering linkage, etc.
Too many obstructions, a rear exit or ideally exits in the same positions as the old log manifold would be better. With A arm clearance, of course.
Still looking.....and Gary may still come up with something...
I have two sets of these to do; both 56 Belvederes, both 2 door HTs. I put my old Spitfires (which I bought from Gary Pavlovich in 2011) on a Belvedere 4 door HT (Sport Sedan) that I found while looking for a 2 door HT.
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CrAzYMoPaRGuY
Posted 2018-07-11 11:49 PM (#566493 - in reply to #566465)
Subject: Re: MORE POLY HEADERS-never installed


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Location: Locked in my Canadian garage....
Why would you not just make your own headers??
I made my own headers, flanges and all for my Coupe. Not too hard and I got exactly what I wanted.
Trying to adapt a header is just as much work without getting exact results you look for IMO.



(headerside1.jpg)



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Attachments headerside1.jpg (91KB - 26 downloads)
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mikes2nd
Posted 2018-07-12 12:18 AM (#566495 - in reply to #3290)
Subject: Re: MORE POLY HEADERS-never installed


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without a welder?
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60 dart
Posted 2018-07-12 4:18 AM (#566497 - in reply to #3290)
Subject: Re: MORE POLY HEADERS-never installed



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i think i might have a nos set of spitfires some place -----------------------------------------------------------------later
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1960fury
Posted 2018-07-12 9:06 AM (#566503 - in reply to #566493)
Subject: Re: MORE POLY HEADERS-never installed



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CrAzYMoPaRGuY - 2018-07-11 11:49 PM


Trying to adapt a header is just as much work without getting exact results you look for IMO.


Yup, I found that out the hard way. Nice work btw!!!
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Powerflite
Posted 2018-07-12 9:12 AM (#566504 - in reply to #3290)
Subject: RE: MORE POLY HEADERS-never installed



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It was a lot easier & cheaper for me to modify these shorty headers than to make a new set. But it is true that making it from scratch would have given me more of what I wanted. But to say that it would have been the same amount of work is wrong. Building from scratch does take a lot more work. The other problem is that purchasing all the U-bends can cost you more than an expensive set of headers because they aren't cheap.

Edited by Powerflite 2018-07-12 9:30 AM




(Exhaust Options.jpg)



Attachments
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Attachments Exhaust Options.jpg (90KB - 20 downloads)
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mikes2nd
Posted 2018-07-12 9:27 AM (#566505 - in reply to #3290)
Subject: Re: MORE POLY HEADERS-never installed


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yeah definitely. I guess the "block huggers" wouldn't clear like the factory? I was looking at a set also and figured that was the case that none can get as close as stock was.

I can cutup a 100$ ebay set or the same 350$ summit racing set
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wayfarer
Posted 2018-07-12 9:40 AM (#566506 - in reply to #3290)
Subject: Re: MORE POLY HEADERS-never installed



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IIRC, in a 55-56 with an LA engine, the Dakota header fits nicely and exits at the rear.
It would seem that using these with a A flange would be the route to try.
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gradford
Posted 2018-07-12 7:41 PM (#566532 - in reply to #566493)
Subject: Re: MORE POLY HEADERS-never installed


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I'll be talking to a local guy about doing just that, and if reasonable, I will get him to build three or four pairs while he's at it, hopefully would be less expensive than doing one pair only. The 56 Plymouth is very difficult to fit in terms of clearances to A arms, starter, and steering linkage, that a set of headers built for that car would, hopefully, fit many others with more room in the engine compartment. Would be nice if the available headers were close to what I need, but they are not, really, without much cutting and welding.
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gradford
Posted 2018-07-12 7:43 PM (#566533 - in reply to #566497)
Subject: Re: MORE POLY HEADERS-never installed


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To: Chuck Lowe (60 Dart)

i think i might have a nos set of spitfires some place -----------------------------------------------------------------later
-----
chuck lowe---60 dart seneca FOUR door(BERTHA) "gone to china" and a 60 dart FOUR door pioneer(BIG RED)390 stroker , 4 speed ---99 springer-72 and 74 tridents-77 650 yammy---freedom rally-toronto,ohio---easyriders rodeo chillicothe,ohio------An old Tennessee Proverb , Anybody can "restore" but it takes a real man too "cut one up"






Chuck, If you have them, I'll buy them!

Edited by gradford 2018-07-12 7:57 PM
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gradford
Posted 2018-07-12 7:55 PM (#566534 - in reply to #566506)
Subject: Re: MORE POLY HEADERS-never installed


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Unfortunately the port layout of the LA is much different than in the A Poly. LA 3 & 5, 4 & 6 ports are siamese, A Poly are all evenly spaced, almost the same as a Chrysler Hemi, but with different flanges of course.
I have been told that the best candidates for modifications to suit the A Poly in a 56 Plymouth are the Chevy LS (not the old small block, which also have siamese center ports) and Ford big block truck headers; in fact, a set on Ebay built for 429/460 Ford trucks are cheap, and look very close, but would need mods for the A arm and possibly steering linkage. Won't know until I do a lot of measuring...
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60 dart
Posted 2018-07-14 3:35 PM (#566594 - in reply to #566533)
Subject: Re: MORE POLY HEADERS-never installed



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gradford - 2018-07-12 7:43 PM

To: Chuck Lowe (60 Dart)

i think i might have a nos set of spitfires some place -----------------------------------------------------------------later
-----
chuck lowe---60 dart seneca FOUR door(BERTHA) "gone to china" and a 60 dart FOUR door pioneer(BIG RED)390 stroker , 4 speed ---99 springer-72 and 74 tridents-77 650 yammy---freedom rally-toronto,ohio---easyriders rodeo chillicothe,ohio------An old Tennessee Proverb , Anybody can "restore" but it takes a real man too "cut one up"






Chuck, If you have them, I'll buy them!



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