Gotta agree with ya Tom... Cubes = torque, big rpms usually mean parts scattered around the ground. .
Well, not perfect, but it is a replacement.....up to a point - which is the volumetric efficiency of an engine. Although it's best to make HP down low on the RPM curve for the engine's longevity, more HP is made with more RPM...again, to the point of diminishing returns due to not being able to get as much air into the engine.
Ah yes, the HAMB, hot and cold running bullshit.Gawd I love reading the "tech" threads on here. Carry on...
How do you think it is a myth? Also a 2 barrel motor would have had standard heads on it with I think 300 HP or close to that. The 383 magnum and 383 comando didnt have special heads they came from the 440 magnum. The six pack or six barrel came about in late 1969 (69 1/2) with a set of 3 two barrel carbs. The intakes were different some were leight weight and others were of heavy cast iron. It depended on what month or when the car was built. I can't really remember why they stopped with one intake. The 440 2 barrel cars had a different head on them. If you can point out that a 440 magnum head wont fit onto a 383 block post it up.
Oh and also there used to be a company making Hemi heads for 318, 340, 360, 383 and 440. The kit produced 1.5 HP per-cubic inch. That was a killer set up but very expensive. I think the kit was around 9K or more. I think I saw them in the Mopar mags around 1998-2000.
It costs the same money to "build up" a 318 as it would a 440 but you end up with only 1/2 the power and torque. Why spend oodles of money on a 318 only to have a guy with a 440 that has a just a cam and carb blow your doors off? I dunno, it's your money...
Local speed shop called R&R expert on mopar has machined and assembled several 318 based engines for circle track. Reason small engine less weight.. All a 318 is what you could say is a 340 with a small bore. Swirl polished heads really pick one up. factory 6.123 rods. older engines have the wrist pin off set .. Very easy to turn the piston around and get a little more dwell at top dead center. Some 318 can safely be bored to 340 std pistons.. I have been told a 340 could be bored 130 and use 428 Ford std pistons. One last thing.. 440 cores are around 300 for a build able engine.. 318 are a little above scrap price 75 to 125 each.
Yup! Ma Mopar made early Polys that were Hemi based. They seemed to be into overlap as the "A" Polys (These are both Early A engines & late Polys) were in production for Plymouth while the other Divisions were still making early Polys (56-58), with another over lap between A & LA (Late or Light A) engines (64-66). In '58 Mopar was not only making 392 Hemis, but 350 & 361 Big Blocks also. Look at the "Hemi Tech Index" for info on the early Hemi/Poly sizes, ect
Look up "318 Poly" for an example of the A engines, which are the last of the polys (1957 - 1966), and are basically regular old small block Mopars with different heads, intakes, and exhausts - especially the 1962 - 1922 ones, when they changed the back of the motor over from "early Hemi style" to "Small b lock Mopar" style). The earlier Polys had heads interchangable with Hemis, and could be found under the hoods of other Mopar products (DeSoto, Dodge, Plymouth (Plymouth didn't get a Hemi until 1966), except Chrysler - they had to keep it classy. There's lots of info out there - enough to make your head spin. But this condenses it down into a paragraph answer. ~Jason
DING DING DING! Winner, why would you even waist your time with 318's. 360's are everywhere, cheap and stock make nice power, without much done to them. like comparing 305's and 350 Chevys most wouldn't waist there time.
If you can find a 440 two barrel, boy would that be special. Same head on a 440 as a 383 of the same year, magnum, or lo po, end of story. There are variations in big block heads, max wedge being the most radical factory head, there were closed chambers too, but mostly the good old open chamber big block head, some with hardened valve seats after '71, but same ports and valves for the most part.
Hemi's are different almost all are "neat" there isnt really a whole lot of "neat" factor to a lower grade common small block as good of a motor as they are they will never have the cool factor of a hemi, flathead, nailhead...and so forth. with a 360 at least your getting some respectable power for the loss of the really cool factor.
Question posed, question answered! Some of us happen to like going around corners as fast as possible, too. My avatar Plymouth has a 51/49 weight bias, and I see no point to adding one more ounce than what is needed to either end.
Jeez....The 383 Magnum heads were no different than the 383 2 barrel heads, nor were they any different than a 440 head. Nothing special about any of them. They were all equally good or equally bad. They never made a 440 2 barrel.
Ok I need to look that up. I had a 74 440 out of a Chrysler that had a 2bbl on it. I guess someone could have put that on there. I always though tin 73-74 that was standard for a 440 in most passenger cars. The 383 has always been my understanding that the heads were different then a 2bbl car. Heads from a 440 will work on a 383 has also always been my understanding. I guess I should just look up the info. I am relearning a lot of stuff after having a stroke a few years ago. Oh the heads on a magnum 383 and 440 are called 906 heads, so they are different then a standard 383 or 440 head.
Uh, NO! The 96 Ram with a 318 made 220HP - not exceptionally strong in ANYBODY's book!yeah it will burn the tires - it's a truck which means low gears and no weight over the rear end. it would be lucky to break into the 15.00's a t about 84MPH
not a mopar man myself..but my brother's OT race car..340 duster..has pulled a few bone stock 318's and with his heads,cam,intake and headers has put them in the 11.90's in his car..
They have A very bad push rod angle, heavy valves and very week valve springs You can turn pistons around but have to cut valve seats (cant) use much cam use a torq type cam purple shaft 284/528 and valve spings KEEP Below 5500 rpm w2 heads wold be great or 340 X heads what I used , 125 p Nos it ,Good intake I used a victer ram , 750 holly. headers it will make 300-375 horse get a 6cly torq convert 390-410 gear will run low 13- mid 12s in a lightend up dart wih a good body set up. 440 a lot more bang for the buck though. warmed up 440 instant mid 11s
And also why he gave us the aluminum Edlebrock small block heads that are part of that 49/51 weight balance!
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