Where is the best place to buy a good intake and whats the best one ? How does the 3.79 stroke crank compare to the 4.00 stroke ? Why are the flow numbers so bad on these suckers ? Who makes a hydraulic roller lifter for these poly engines ?

Here's the latest intake for the Poly J.C.
http://chryslerpower.com/webstore/Poly/Poly-SS-X-Manifold

I don't know much about it except it's entering production now.

I've written "books" on this site, look'em up.

First, you can use 318 LA stroker pistons that are readily available for the 4" crank, if you add an intake valve notch to the pistons.
Second, the camshaft will be a bigger problem than the intake.
Third, the intake problem is bad enough. There is the Edelbrock P-600 3-2s with timny carbs, then the stock cast iron four-barrel and two-fours intake, the single 4 is selling for around $500 on the 'bay. Then there's the Weiand 7503 which has also sold for $500 and up on the 'bay within the last year. It's not a great manifold, basically a huge box with a divider down the middle, so it isn't a dual plane. I have one and it works okay but a real dual plane would be better. Then there's the "new" true dual-plain as shown above, I t5hink it's listed at $600 and that's before shipping. It's a closely-controlled product so don't expect to see it in Summit anytime soon.

The block weighs around 50lb more than an LA.

The heads don't flow very well, but they are about on par with a 1976 360 head.

You have to use your old rockers.

IF you are serious about this project you need to get in touch with Brian Hafliger, known here as OU812. Back in the day when I was assembling all my info, he responded to one of my posts and said he'd ported some back in the day, he said the higher one moved the intake port the better it flowed.

Deck height is the same, and crank, rods, distributor, timing set, oil pump, front end of the motor basically interchange with the LA. As a matter of fact the crank and rods carried over into the first few years of LA motors. The rods are clubs, around 750 grams, compared to a decent smallblock 630gram rod.

R.

One other thing: There is a member who has actually written a book on Poly motors, sometimes he shows up here as Panic. A Websearch will come up with his 30 or so books.

What I find somewhat funny is that the first picture of the "wind tunnel" intake is actually a Hot Heads early hemi intake. The third picture is the same intake with a prototype water crossover/t-stat housing welded on.

There was a guy in IIRC Minnessota that was grinding stock cams to what you wanted.When we were going to build the poly in the Charger my kid talked to him.That was a long time ago though.He was reasonable on price I believe it was under 175 bucks.Rocky

Chrysler Power magazine is usually a laugh, when they are publishing it. In the same issue with the intake, which I bought off the stands, the two old guys who produce it are "spokesmodels" for Mary Kay products for men. You have to see it to believe it.

Reading the article a few times, I did find the mention of them using a Hot Heads 392 intake as a model. That intake is pretty nice, it's done good things in Enginemasters. The Firepower has bore spacing of 4.5625, the A motor is 4.46. That means they may have to do some cutting and pasting.

It's still an uphill battle to get the molds made and the intakes into production. I wish it wasn't so hard to do. From the article, again, they are having the castings made at Buddy Bar foundry in California, and from the pictures it looks like Buddy Bar also casts the aluminum HP Performance Hemi blocks.

There is a guy who makes DeSoto intakes, calls himself V8 Performance or something like that. Those look very similar, too. They all look like they'll work better than anything that is or was on the market.

R.

PS: I thought I'd really done something when I compared a 351W intake gasket to a Poly intake gasket, the elation was ruined when someone pointed out the Mopars and fords have the leading cylinder at opposite sides of the engine compartment.

http://victorylibrary.com/POLY.htm

Call Gary Pavlovich @ 1-619-572-3008, he is the man. I just drove a 67 Valiant back to SoCal from Indiana that is poly powered. The engine has a Scneider cam, ported heads and ported factory intake, in the little Valiant with a 4-speed and 3:23 rear it averaged 14mpg over 2025 miles and ran like a top.

Moparts doesn't allow me to post photos here but if you send me an e-mail jlemire426@gmail.com I will send a photo of the engine tucked into the A-body

I was pretty happy with my dual 4 BBL on my poly with
home ported heads even back then.. was in a 62 dart..
lots of port work on the heads and intake

In my '64Dog D100, the Weiand 7503 with a rejetted Holley 80570 got 15.5 mpg.
Same truck, same everything except the '86 318 with 360 roller cam and home-ported heads, thin gasket plus the 360 4-barrel intake, same carb on an adapter, 20mpg with highest calculated of 22.1.
I have put over 8000 miles on my "new" engine and the lowest mpg caarrying a load against a strong headwind was 18.8. All mileage figures from highway trips, most over Wolf Creek Pass, speed held as closely as I can to 69mph.

R.

PS: That stock 4-barrel intake before porting is worth around $500, they are rare and you cannot find one for less than that. So, a ported cast iron stock intake would have a pricetag of around $800.00.
Much as I love Polys, they do have some shortcomings.

The amount of torque this little puppies make is interesting. I have ported about 7 sets of heads now for a group of poly guys and have had a set flowed by an independent shop in Warsaw Indiana, I find myself not believing some of the numbers I had seen posted elsewhere, At any rate, I am not going to get into a flow numbers discussion I just wanted to say that as odd an engine it is I have found it to be a ball to play with.

As far as intakes go, I know of someone who offered me an original dual quad set-up complete with air cleaners for $800, I will pass his contact number onto to anyone interested. My plan for the engine in the Valiant is to pull it and replace it with a 408 blower combo.

Joey

PM me if interested. My engine builder puts early Hemi heads on them....Not sure which years interchange, but I know he knows.

Early hemi heads on early hemi based polys only.

There is no hemi head that fits the polyspheric "A" motors (277, 301, 303, 313, 318, 326).

There are only 3 "generation 1" (oldest) hemi engine families:
Chrysler 331, 354, 392 (and the poly-only 301)
DeSoto 276, 291, 330, 341, 345 (none made as a poly)
Dodge 241, 270, 315, 325 (and the poly-only 259)

More data on my page here:
http://victorylibrary.com/mopar/m-table.htm