HEMI Tech - POLY Tech - early Poly motor info

...of anything in particular...?


.

 

Its a 318 poly but don't yell at me for that i haven't been able to find an earlier one yet. It is in my 27 chrysler with the mcculloch supercharger though!

 

Well, we won't yell at you. It's a neat motor! But unfortunately (and don't think of this as a personal attack or anything) it is completely off-topic for this thread. Doesn't offer any technical information related to early Poly motors.

Very cool though! Love those McCullochs!

 

Just to help keep this focused, I'll restate this. T

hanks!

 

Dude! That was months ago - I think that guy just found my post.

Since the 318 guys are coming out of the woodwork, why not setup a section for 'em?

~Jason

 

Well Jason, you are the computer guy, make it happen...

Gary

.

 

Because then I would have to start one for big block Mopars, then I may as well do SBF's and SBC's and Flatheads. Hard enough keeping up with the Hemi stuff. Only reason I did the Early Poly engine stuff was because they use the same block (for the most part) as the Hemis.

I like 73RR's idea though! Since you brought it up... Hmmm... You should start a section on later Mopars!

 

Thinking of selling my 1958 325 Poly. It runs great, but smokes. Any takers ? Will be pretty cheap ...

 

I've got a real dumb question. Doesn't a lot of oil get trapped in the bottom of the scallops on the valve covers?...

 

I have a 55 Chrysler 301 Poly for sale.It has early Hemi heads,block boiled and oil gallerys rodded out,rocker assys. and rods chemically cleaned. Block and crank excellant,no cracks in block,will take .020 bore and crank probably a polish or at most a.010 grind.Comes with chrome firepower valve covers,chrome block hugger headers,aluminum timing chain cover for a chev water pump.Engine currently in my living room being used as a coffee table.Needs to be in a car.$1500,sounds like a lot of money but it is all stuff you will need anyway and all the dirty work is done.

 

Mmmmm..... I love Polys

Rat

 

I have an extended bell 331 Hemi and have been looking for a short tail 331/354 block to have on hand depending on what project the motor will go into eventually.

I had a line on a 331/354 block but the guy said it needed sleeves, he bored the worst cylinder 60 over but it still needed at least another 60 to cleanup so I passed on the block.

I asked him to keep me in mind and he sent me an e-mail yesterday stating he might have a 301 poly block. Now I did some searching through the archives and found that the 301 is basically the same block as the 331 but with a 3.6XX bore to the 331's 3.8XX bore. So there is no way you could bore a 301 out to make it 331?

Now another question I have is to do with the crank, rods and stroke. Does the 301 have the same crank and stroke as the 331? Could you use a 331 crank and rods in the 301?

 

On the 1st block 331s often can go .125, 354s only .062(4" 392 std). Get more info before rejecting it. 301 is same as the 55 331 except smaller bore. I've never seen a sonic check results to see if Chr adjusted the wall thinkness down for the smaller bore, or if they have really thick walls. You could use '55 331 or '56 354 crank & rods in it.

 

Thanks for the info George....

The 1st block I was looking at was actually a 354, so it didn't clean up at .060 so it probably would have needed at least 3 sleeves.

So that is good news if I can use the crank and rods from my extended bell 331 in the 301, if I go that route. Obviously the displacement would be less but I'm not too worried about HP or Cu.in, just the look and such of the early Hemi.

I read somewhere that the early 51-53 small valve heads would be a better choice on the smaller bore 301. Which is good since the heads I got with my 331 were/are rebuilt, 25 years ago, but kept in oiled bags until i got it. So I would prefer to use them.

 

Notice that I didn't mention 51-3 cranks in my reply. There is a slight diffrence in lenth on the rear of the 51-3 cranks. It caused starter problems for Scooter when he tried a short tail crank in his long tail block, don't know about long cranl in a short tail would have a problem or not. putting 51-3 heads on a '55 block would require changing the locating dowels(not a biggie) & you would have to compare head gaskets.

 

George covered most of the problems, but recall that 51-54 have a wet intake. The 301 is just like any 55-58 with a dry intake. Unless you are a glutton for punishment keep the early engine together and source the appropriate parts for the newer unit. If the 301 is complete with heads I say run them, they are an excellent poly-type design. Recall that the little 301 had to have some grunt in order to move a 55 Windsor.

.

 

301 and 331 are the same stroke so changing the crank would gain you nothing but more work.

 

thanks Scooter...and friends for putting this stuff out there....

 

any body no anything about these poly numbers any help would be greatly receved
block csting no 2264229
engine id stamp sv-11 37c
cast number above frost plugs drivers side 11301
cheers stretch

 

That is a late 60's/early 70's vintage casting number. Check in over at 'moparts'...

 

That's totally a 313 from Canada.

~Jason

 

question , can i stuff my 331 chrysler hemi heads on a 1964 318 poly block? so i can use a auto trans and my very expensive drag star intake set up you see in the picture on the left over there?

 

Basic answer is NO

 

No! period!

 

I dunno George...he didn't say that he actually wanted it to work....

.

 

Got a point there!

 

Hi Guys,
Joining in here for the first time ; I am investigating the purchase of an engine seems to be a 354 Spitfire. Owner said it was a 392...not aware of any 392 Spitfires

Clues:
Apparently out of a 58 Saratoga, Have a castiron intake with a 4BBL of some sort on it - which gels with the 354 out a 58 Saratoga

I apologize for the pictures as the current owner well it is buried beneath rubbish.

I notice that is have a power steering pump, and a W cast on the lock just above the starter location.

I am waiting on better photos - and the engine serial number.

Regards,
Fanie Gerber
South Africa

 

Very cool, if you can get ahold of it!

It does appear to be a Spitfire motor, and I would also guess it's not a 392. The numbers you will need to identify it are on the top-front of the engine, right behind the water pump on top of the block right in front of the valley pan.

Good luck! Hope it works out for you!

 

The 'W' says 354..............

Excellent engine IMHO.

.

 

Does "rubbish" = "a lake"?

LOL!

~Jason