Got the Poly apart yesterday. Interesting piece for sure. I'm getting a lil excited now.

I dont even know how to put a pic on here from my phone....lol

Started porting on the heads. Lots of parts are here. This is a pretty neat ole engine. I went with a hydraulic cam as opposed to a solid .

Hello, I'm a freshman, been reading about Poly stuff on here and found it interesting!
Decided to sign up!
I am in the U.K., and I believe I am the first in the U.K. To build a Poly Stroker.
It is a 402, and Gary Pavlovich supplied me the parts I needed to do this project, and I have recently managed to get it running. One thing I can say, this engine sounds very different to other more popular wedge engines. It has a low meaningful 'Rump' at idle, and revs smoothly and quickly through its rev range with no hesitation. It has a ton of grunt when I give it some gas, very lively, I'm having to run stock log manifolds just at the moment until I finish sorting some custom fender well headers I have been dreaming about!
The engine is the original 318 Poly fitted in my 1965 Plymouth Sport Fury, and that as you all know is a very heavy car! It's got a 727 with a 2800 stall converter, rear end was originally a
3:23 clutch type locker which was optioned with the car, I've since changed these gears for
3:55s, and also managed to convert a B body casing to put it all in, which allows me to fit some pretty big rubber to the Torque thrust rims, and got them to fit nicely under the original arches without having to radius them!
There is a reason I did this, mainly, because people told me I'd bought the wrong car with the wrong engine to make go fast! They were right, but what I have ended up with, is a very fast big car! And it causes people to scratch their heads as to what it is under the hood, as in the U.K., not many people know these engines even exist, or if they do, they'll swing it out and use it as a garden ornament with flowers growing out of it!
From my point of view, it was something different, everyone seems to have the popular wedge or Hemi engine in their car, and they get them to go seriously quick, but it gets a bit boring and samey, so I thought I'd go the poly 402 route and see what happens!
So far, I've got a big C body that seriously shifts! Shed loads of torque, and very responsive, at the moment the log manifolds are holding it back, I reckon there is another maybe 100hp to be had by sorting the headers, that will be awesome!
My ambition is to get this big old Fury down the quarter mile somewhere in the twelves, with this 402 in it, I've still a lot of work to do, I've removed the bolt in fender wells, which has saved a bit of weight, and given me more room to design the headers, it's a big engine bay!
So far, this project has cost a fair amount to get this far, it's taken 10 years from conception to what it is now, I love being unique, the first to do something, and having a goal I'd like to achieve with it, I have a somewhat limited income and have to put money by to buy a this and a that, but I think that is what this hobby is all about for me, and I don't regret a minute of it, I've learnt a hell of a lot, and as time goes by, there seem to be more hop up parts appearing, and will further help me to get this beast down the track at silly miles per hour.
On the road the Fury sounds boss, is very manageable, and instantly responds to a thump on the gas pedal, there aren't many 65 Furys in the UK, and it's a cool looking Mopar, the only Mopar with stacked headlamps, and a pleasing look about it, and when I get it ready for the track, I'm sure it's gonna raise some eyebrows! Anyone interested in having a look, it's on YouTube under 'poly stroker' there's 2 vids of it idling, best listened to with headphones on, to appreciate the sound. Hope you've enjoyed reading this, if there's any interest, or questions about how to get over a certain problem, I'd be happy to help, and keep you posted as to the progress of this project!

I've always liked Polys, but have so far had very little chance playing with them. Now, give us an aluminum head with raised ports and a modern chamber and you would be starting to make some noice...

All the Mopar Poly heads where made for economy, cheaper to make than the Hemi heads in 1954, two barrel intakes, geared for the old people who bought the cheaper Chryslers, Desotos ,Dodges and Plymouth. they where not made to make good HP
I do know that Plymouth put dual quads on there motors for several years in the mid to late 1950s before they switch to the B and RB motors.Dodge got it correct using the Chrysler 354 dual quad Hemi motors in there D500 cars in 1958 More power to those that want to turn a non HP motor into a powerhouse Good luck

IIRC the Dodge 325 poly (not related to the poly A except for general design) took some records at Daytona.

Since you have to make the exhaust, considered a turbo? Run it off the original logs, makes up for inadequate intake ports quite well...

Some food for thought...

http://www.hotrod.com/features/1601-stra...18-small-block/

Not sure why they went to all that trouble boring .040 and grinding on a 4" crank to get 402 cubes when they could have just bored it to 4" and used the 4" crank off the shelf or maxed out the cubes with a 4.125 or 4.25 crank.

Kevin

Well the Poly 318 might have been a throwaway engine 10 years ago but now there is enough buzz that the ignorant folks who have one hiding under a tarp somewhere think they're gold. Asking prices starting at $300 up to $1000. That's for a core. Kind of the same as 413 blocks.

Trouble is that roughly 12 people are building serious Poly motors. That's not enough to support a commercial effort.

My Poly 318 is sitting in the back yard waiting to be torn down. The '86 318 that replaced it got an instant 5mpg better using the same carb and exhaust system. I also built that engine with the 360 roller cam which is close in duration and lift to the Poly stock cam. I did port the 302 heads myself, I think they're better than stock now, but didn't touch any other parts of the 302s. Mag heads are better than my 302s.

My experience leads me to believe that anything a Poly 318 can do, a 5.2 Mag can do better, except wow'em down at the drive-in. This, for a lot less money. Plus iron head to iron head the Mag is at least 55lb lighter than the Poly.

I was the world's biggest Poly supporter and still think they're cool, but to say they're better than an LA when both are maxed out is just being foolish.

R.

Two other things; the deck height of a proper Poly is 9.600" so the wide-block name means nothing, and the exhaust valve stem is straight up from the cylinder, no angle.

"Wide" is the greater width across the exhaust ports and manifolds.
The poly "A" intake valve stem is at 19 degrees to the bore axis.