Hi All, I just registered here but ive been lurking for awhile. Ive got a 67 Monaco with a poly ive had for a few years. I just picked up a OEM dual quad intake and now I am looking for carbs. I really hope i have the time and money in the future to do the 402 stoker and use the intake closer to its potential. So for now I guess im trying to justify a way to get it on my motor and gain a little hp. So I guess id like to hear some advice on what carbs to use, or wether or not i should just be patient.... TYIA Matt Oh, also, does anyone have any idea how many of the cast iron 2x4s were made and if any casting marks could tell me what it may have originally been on?
The only factory installed dual quad I ever saw on a 318 was on a '58 Fury. Went like stink! Always wanted to put the heads, intake, and cam in a 360 block with a set of custom pop-up pistons, that would be a cool sleeper! Those old heads were better than the LA heads in my experience.
I know that the 318 Fury had a dual four rated at 290 hp the other optional engines were single 4's with a more aggressive cam and dual exhausts probably the best was 58 Chrysler 354 Saratoga with 310 hp. My wife's car is a 65 Coronet with a 318 poly. dont really see a lot of the 2x4 set up, there cool I'm looking for one but it will not go on a stock motor... and I'll run a small cfm Carters. Plymouth made poly's 241/259/and 270...Dodge made 270/315/and a 325 Chrysler poly head engines were 301/331/ and a 354...........
Lets stop this insanity before it gets out of hand. POLY refers to the A series engines starting with the 1956 Plymouth 277. It should never be a reference to the Non-Hemi headed Dodges-Plymouths and DeSotos prior to 1959 and never used to describe a Chrysler Spitfire. Jason !!! Where are You ?????????? As for the factory iron 2x4, on a 318, it is 1957 only. Yes, it will fit the other POLY engines; 277-301-303-318-326. Yes, there are two (2) 301 engines (Plymouth and 1955 Chrysler Spitfire) and nothing interchanges. The 326 is not the same as the Dodge 325. The easy way to identify a POLY is that the intake manifold seals the heads and the block...no valley cover. Jason !!! .
73RR is correct, the poly that most people know about is the "A" engine, which later spawned the LA engine family. Crankshafts, timing chains, oil pumps and pans and front covers will interchange with LA stuff, but no way are you going to bolt the heads onto a 360! And you wouldn't want to - a bowl port on the LA heads and you are better off than the poly heads for flow, especially if you start with X or J heads or even better Magnum heads. The Polys have a cool factor and can make tons of torque and pretty good horsepower with a good cam, intake and some headers, but I wouldn't say they make more power than an LA, not for the extra weight penalty of all that iron up top.
lets stop the insanity? everything I typed was correct....never said 360 would fit ..have 3 318 POLY'S and a 360 not the same...................so whats insane about that?????????never said anything about interchanging parts,,,,because more than not they want fit..
Hey guys, Sorry if my afterthought got you guys off track. Id really like to know what carbs are readily available for me to use. i havent really seen anywhere online to get a couple of matching carter wcfbs. Is there newer 4bbls available with realitively low cfms (300-350) that will fit the bolt pattern of the intake? And so 73RR, youre saying that this intake was cast for only one production year?
73RR: stop this insanity before it gets out of hand. POLY refers to the A series engines starting with the 1956 Plymouth 277. NO! debuted in 1955..........there were actually two versions of the polysphere, one series was based the Hemi block and were built in displacements of 241/259/270/315/325/331/354 cubic inches...they can be converted to hemis by substituting pistons,heads,rockers,push rods,intakes and exhaust manifolds......no one make will interchange with another........the second version of the poly referred to as the A series were built in displacements of 277 301 303 313 (Canadian) 318 and 326 built through 1967........
Hey is this Gomonaco from the C-body board?? If it is glad to see you over here...seem like a good group here and TONS of info if you use the search options... I replied to your question over on the other board BTW...
I'll only piss on your boots once... by your own description, what you call POLY then started in 1954 as a 241 truck engine, you left out the 55 Chrysler Windsor Spitfire 301 and intake manifolds work on both the 'single rocker shaft' (Chrysler terminology) version and the 'double rocker shaft' version. Your turn. Apparently, what you failed to realize, is that this subject has appeared far too many times in just the last year with plenty of mis-information regarding swapping parts between non-compatible engine series. The 'insanity' part is simply a poke at those who refuse to use the search function before they post, yet again, questions that have already been beaten to death. gggeeeessshhhh..... .
I had one of those manifolds years ago and if memory serves Carter AFB's or Edelbrock Performers will bolt on. I would go with a pair of 500's. Now that is too much CFM for a 318 that is not turning 7500 rpm, but, the air valve secondaries on the AFB probably will not open very far because they are vacuum sensitive, so you might use 600 CFM out of the 1000. Not hard to tune, you might not need to jet them at all and reliable. My $0.02
I'd look into the Edelbrock 500cfm carbs for it; they make the Edelbrock carbs with both holes for the Holley style bolt pattern and the smaller bolt pattern (like pre-Quadrajet Rochester 4bbls and wcfb's). Should fit your intake. Luck!
Just open up the bore holes on the intake & the Edelbrock will go right on. The Aussies have put A heads on LA blocks & LA heads on A blocks.
73RR didnt take info from the past year or any other years before the info I posted came from THE COMPLETE CHRYSLER HEMI BOOK......................................which I'll go by what the book states......
The dual quad intake manifold was a two year option, available in both 1957 and 1958 Plymouth Furys. You'd be better off with some Edelbrock carburetors, but otherwise if you can find a cheap pair of Carter WCFB's, you can get a rebuild kit from the carburetor shop for about $120. The best way to improve your power at this point without getting too serious would be to build (or buy) a set of headers. http://www.stans-headers.com/ Stan's Headers sells Poly headers that may work for your application, but if I were you I would just buy the header flanges from him. If you don't have a tubing bender, I would recommend you purchase a weld up small block ford header kit, and substitute the poly flanges in place of the ford flanges. If you can weld, this would be your cheapest best bet. For the cost of a few hours and an intake gasket set, you can gasket match your intake ports. For what it's worth, you could buy a LA 318 electronic distributor and it will swap right on the poly.
How did I miss this? I must've been on the pot... I'll have a more complete reply after I get to work. Insanity? I have 3-year-old twin girls. Don't worry... you get used to it after a while. ~Jason
318 poly heads won't fit a 360, huh? Somebody shoulda told me that thirty years ago when I put 273 heads on an "A" 318! Had to grind a bit of valve clearance in the pistons, and use the 273 cam, but that Barracuda went pretty good for them "not fitting"! Never actually did get a 360 running with them on, but I have trial fit them in the shop, everything fit.
First off, here's some obligatory links, Join the Yahoo Group at the top of the page here: http://www.geocities.com/polyman64/ You may also check the forum out here: http://www.diamondbackengines.com/forums/index.php/board,6.0.html The Victory Library guy is on the HAMB here, and goes by the name "panic". He's got TONS of great info. Check it out: http://victorylibrary.com/POLY.htm ~Jason
The 318 Poly, from '57 - '66 doesn't have Hemi heads that swap off, nor does any other motor from the A family, which includes: CID Year Bore Stroke 277 1956 3.75 3.12 301 1957 3.91 3.12 303 1956-57 3.81 3.31 313 1957-64 3.88 3.31 326 1959 (Dodge) 3.95 3.31 318 1957-67 3.91 3.31 See this link: http://www.allpar.com/mopar/a-engines.html Keep an eyeball out for these! Also, in '62 the 318 Poly went from having an early Hemi bellhousing to a regular LA small block Mopar bellhousing. Even if you have a early '57 - '62 318 Poly, you can still readily get a bellhousing adapter for an early Hemi and use it to attach anything you want. The dual quads were indeed an option on the V800 engine on '57 & '58 Furys. Info on production on those intakes is as simple as doing a Google search for '57 & '58 Fury production numbers, and filtering out the ones with the optional motor. It's also valuable to know about the V800 alias these motors went under (hey, Plymouth never got a Hemi 'til '66 with the 426 - they HAD to name it SOMETHING cool!), as searches for the 318 Poly under THAT name often yield some pretty interesting results. ~Jason
You're goddamned right they are! They flow BEAUTIFULLY, even stock. Of course, there's always a LITTLE room for improvement in anything! LOL! ~Jason
Those low CFM carbs are exactly what you'll need. A few minutes with panic and you'll change your mind on the larger CFM carbs. Edelbrock bought all the Carter stuff when they shut down - consequently, Edelbrocks ARE Carters - some better than Carter's Carters! ~Jason
I'd go with the low CFM carbs. 600 CFM is about perfect for that motor, even built up! Honestly, I'm liking home made fuel injection a lot more these days! LOL! The dual quads really are pretty cool, but a 600 CFM carb (or a 750 if you're wanting a little more) on a Weiand 7503 aftermarket aluminum 4-bbl intake is totally where "bang for the buck" is. Me? I'm happy with a 3x2 or a factory 2-bbl intake with a 500 CFM Holley 2-bbl on top. ~Jason
LOL! Even though Carter/Edelbrock carbs are the "path of least resistance" to get it all to bolt together, I am SO a Rochester and late Stromberg guy! ~Jason
Carter 9400's should work pretty well. They're 400 cfm carbs. I seem to remember Part # 9401 being for use on Chrysler products too. The throttle lever kicked out to the side to line up with Mopar throttle cable placement. Regardless I'd say the smaller the better. A set of original street hemi carbs with proper jetting might work too.
What took ya so long... Ok, call 'em polys. Personally, I find it confusing to try and describe 3 different engines by one moniker, but that is just me. Since the Chrysler was named a Spitfire I'm sticking with that. Gary .
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