Re: 318 Poly Stroke Rebuild or Not
[Re: Lugnutz]
#2815142
08/30/20 03:29 PM
08/30/20 03:29 PM
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Joined: Aug 2003
Posts: 43,243 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,243
Bend,OR USA
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I think you would be far better off building a stroker LA 360 motor for you car than a early poly 318 motor It will bolt in and hook up to your existing tranny, the only part that won't work is the drivers side stamp steel engine mount, the 340 and 360 are wider on the mounting ears on the block than the 273 and 318 are. I've seen guys use washers as spacer on their 318 cars, I wouldn't do that but I would use some thick wall tubing as the spacer needed
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 318 Poly Stroke Rebuild or Not
[Re: earlymopar]
#2815202
08/30/20 07:29 PM
08/30/20 07:29 PM
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Joined: Aug 2003
Posts: 43,243 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,243
Bend,OR USA
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Dude, how can you imagine a stock stroke Poly 318 motor making over 300 HP, let alone 400 I've own and driven several early poly motor powered cars including my first Dodge, a 1959 Coronet 2 door hardtop with the one year only 326 C.I. two barrel single exhaust 235 HP rated motor. I traded that intake and carb to a friend who parents had a 318 powered 1959 Plymouth wagon sitting in their driveway collecting dust with a 4 barrel intake and carb, I put dual exhaust on it later but it was still not very powerful My first Chrysler 331 C.I. Firepower Hemi would eat its lunch in a much heavier car That stock 1955 motor was factory rated at 250 HP My last 392 C.I. powered 1957 300 C car was rated at either 350 or maybe it was rated at 360 HP in 1957 with the small Carter WCFB,CRS now. The 1958 300 motors with the larger AFB was rated at 375 HP, I think now. I'm not sure about the fuel injected 1958 300 D motors on their factory power rating
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 318 Poly Stroke Rebuild or Not
[Re: Cab_Burge]
#2815345
08/31/20 07:52 AM
08/31/20 07:52 AM
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Joined: Jan 2003
Posts: 1,336 Oregon
earlymopar
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,336
Oregon
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"Dude" there's no "imagining". The 59' dual-four poly 318 was 290 H.P. with just a camshaft and induction change over the normal poly so getting 300 to 350 is nothing. Without going into everything on mine, it's stock stroke with the usual block and head work but with a small twin-screw supercharger and W/M injection. I never said I had a stock intake set up.
Last edited by earlymopar; 08/31/20 08:10 AM.
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Re: 318 Poly Stroke Rebuild or Not
[Re: earlymopar]
#2815423
08/31/20 11:04 AM
08/31/20 11:04 AM
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Joined: Aug 2003
Posts: 43,243 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,243
Bend,OR USA
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390 HP is not any where near 475 HP, with a stock stroke motor. Stroking it and raising the compression may add another 40 to 60 HP, depending on the cam and peak HP RPM. Me thinks those motor where rated at 290 HP, not 390 HP On your deal adding a supercharger with water and methanol injection may help you blow the stock bottom end out of it The poly heads, no matter which brand that Mopar installed them on, where designed for low power and low production costs, not making power above 4000 RPM I would like to see the manual you got that 390 HP numbers from The 1957 and 1958 392 dual quad solid lifter 300 letter Hemi motors made less than 380 HP How and why would Mopar make the 318 motor your talking about have more power in a lot cheaper car? The 1958 Dodge D500 cars made for NASCAR racing had 354 C.I. Chrysler dual quad Hemi motors in them, check the HP rating on them
Last edited by Cab_Burge; 08/31/20 11:12 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 318 Poly Stroke Rebuild or Not
[Re: Cab_Burge]
#2815549
08/31/20 03:03 PM
08/31/20 03:03 PM
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Joined: Jan 2003
Posts: 20,837 A collage of whims
topside
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,837
A collage of whims
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We need to set aside factory HP ratings vs dyno ratings, as the factory #s were without accessories, optimized, and influenced by marketing. Obviously, an ACCURATE dyno tells the real tale, but most of us have seen "happy" dyno #s. The issue, I suspect, is if a stroked Poly will have the torque to move an early B wagon along on the street while being cost-effective. Max cost-effectiveness is probably a later 360/5.9, maybe even an EFI deal. Like I said, depends on how stock-appearing the OP wants. My stock, tired Polys moved my '63 & '64 stick wagons along pretty well. Neither (obviously) was at all fast, but pretty adequate, and they were both tired, as in mildly smokin' tired, when I got them. IIRC, Polyspheric's book had a 400-ish HP stroker recipe, but I'm assuming the OP just wants a street cruiser (torque). I'll throw this out there: look how hard Dizuster's '62 Savoy runs with a simple turbo 360 recipe...
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Re: 318 Poly Stroke Rebuild or Not
[Re: Lugnutz]
#2815557
08/31/20 03:16 PM
08/31/20 03:16 PM
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Joined: Jul 2003
Posts: 3,464 Back in NJ....
EWJ
master
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master
Joined: Jul 2003
Posts: 3,464
Back in NJ....
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If you are on Facebook, perhaps this will have interest to you. Am sure the builder has a lot into it- and seems that he must now move this along: https://www.facebook.com/marketplace/item/269556450712514/
Ed EastCoast Land Yacht Assoc. 1967 Newport Conv: 440/4 speed 1969 GTX: 440/4 speed, TX9/TX9, A34, N96 1970 Super Bee: 383/4 speed, B5/B7 1970 Coronet RT: 440/4 speed, A34, N96 1970 Coronet RT: 440/auto, A36, N96 1970 Road Runner convertible: 383/4 speed TX9/D6XW 1970 GTX: 440+6/727, A32, N96 2001 Dodge 2500 HO CTD, 6 speed, 4x4 quad cab long bed "The early bird may get the worm, but the 2nd mouse gets the cheese".
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Re: 318 Poly Stroke Rebuild or Not
[Re: EWJ]
#2815746
09/01/20 05:18 AM
09/01/20 05:18 AM
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Joined: Jul 2003
Posts: 4,782 Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,782
Holland MI Ottawa
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To build an odd engine is aactually very very cool. If your on a beans and rice budget its best to stay mainstream- 318/360. But many of us are at the age where we have some money and want it done the way we could not afford in our younger years. I say build the Poly. And build it with the dual quad manifold and the stroker kit. Im a die hard mopar guy but a 354/392 Hemi or restored Polysphere makes me stop and investigate every time. (Along with the 409 chevy and Y block Ford)
Keep old mopars alive.
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Re: 318 Poly Stroke Rebuild or Not
[Re: Cab_Burge]
#2818451
09/08/20 09:44 AM
09/08/20 09:44 AM
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Joined: Jul 2003
Posts: 4,782 Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,782
Holland MI Ottawa
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I will say again. Different is cool. If a bad ask street strip terror is not the goal- or if the budget is not Uncle Tonys Garage level (really REALLY low) a poly 318 is awesome especially with the period correct (and only option available) Weiand dual quad intake.
Keep old mopars alive.
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Re: 318 Poly Stroke Rebuild or Not
[Re: 2boltmain]
#2818738
09/08/20 08:58 PM
09/08/20 08:58 PM
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Joined: Dec 2009
Posts: 284 STL ,MO
Handygun
enthusiast
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enthusiast
Joined: Dec 2009
Posts: 284
STL ,MO
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As the owner of a 396 Poly in a 65 D100 I can tell you it wouldn't be hard for Bruce Toth's other parts to be better than his gen 1 Hemi to poly 318 header adapters,and don't buy pistons from RaceTec.
Last edited by Handygun; 09/08/20 08:59 PM.
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