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Re: Yet another 383 question...I know Im killin you guys...
[Re: Cab_Burge]
#973336
04/16/11 11:52 AM
04/16/11 11:52 AM
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Joined: Jan 2003
Posts: 75,020
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,020
U.S.S.A.
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Quote:
Doesn't anyone of you have a factory service manual? I do, maybe I'll look up the deck hieght on the magnum 383 in the morning and post what the manual says 
I do , there isn't anything in it that I ever saw ? I have it here at work , I'll go look at it .
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Re: Yet another 383 question...I know Im killin you guys...
[Re: Pale_Roader]
#973346
04/19/11 10:43 AM
04/19/11 10:43 AM
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Joined: Jan 2003
Posts: 75,020
U.S.S.A.
JohnRR
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I Win
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Quote:
Okay, this just further bolsters my search for a 68-69 4bbl 383 runner to stab in my Challenger. I'd read that positive deck bit in a couple Mopar mags as well, always wondered about it. All my 383's have been newer, and the one 69 i had was a 2bbl engine... i seem to remember that one being around .030" below deck on average. Mine was particularly bad though... deck heights were bloody all over the place.
SOOO... reading all this what i'm taking from this is that there IS a way to build a super-cheapo zero-deck or at least hokey quench engine. Find a 68-69 383 4bbl engine, pick a head gasket that will give around .040" quench and bolt some closed chamber heads on.
Is it really that simple...???
Also, are we talking ALL 68-69 383 4bbl engines here, or ONLY the actual HP engines...???
I have a 69 383 2bbl piston here , it's the same height as the 4bbl piston but it has a Shallow round dish , if I get bored I'll cc it.
There are 2 68/69 383 4bbl engines , one is Stamped HP , the other is not , but it is an HP engine with the 2bbl cam instead of the 440/375HP cam.
So yes , 68-69 4bbl shortblock , felpro composite gasket and a closed chamber head with 80cc chamber will net you a 10.0ish engine. A 70 will have the piston a little lower in the bore , I don't know how much, 71 will be even worse it appears. Otherwise plan on decking if you use the Speedpro , Diamond or KB flat top to get zero.
If you weren't on the other side of the planet I have an original 69 383 HP shortblock that would do exactly what you want.
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Re: Yet another 383 question...I know Im killin you guys...
[Re: 74fldart]
#973347
04/19/11 11:23 AM
04/19/11 11:23 AM
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Joined: Jan 2003
Posts: 5,186
Wherever I am.
Junky
master
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master
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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Quote:
dont even consider a 1971 engine unless its been rebuilt with some aftermarket pistons in the past. i have one and the piston deck height is .090 .
The 1971 383 (four barrel) I have has stock flat top pistons, no valve reliefs, 0.020 in the hole. The block is stamped 1970. Came out of a 1971 Newport.
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Re: Yet another 383 question...I know Im killin you guys...
[Re: court9155]
#973350
04/19/11 05:00 PM
04/19/11 05:00 PM
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Joined: Aug 2007
Posts: 902
Seattle, WA
rss
super stock
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super stock
Joined: Aug 2007
Posts: 902
Seattle, WA
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Quote:
Is it really that simple...???
My guess would be NO. I haven't been looking, but my guess is that it wouldn't be too simple to find a 40+ year old 383 that didn't need to be overbored. The deck height advantage of the 68-69 383 comes from the compression height of the piston. Therefore, as soon as you bore the block you are in the market for new aftermarket slugs, none of which are made with a 1.932" compression height. As far as I know, closest thing you can get are the Sealed Power 2315s, which are at 1.920".
Seems to me like the "simple" thing would be to have the block machined to get the zero or positive deck height you are looking for, but who knows, maybe there is an endless supply of low mile 68-69 383 shortblocks where you live. 
Going my route, you would also be able to square up your block to ensure consistent deck heights for each cylinder, which would probably not be the case for an untouched factory block.
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Re: Yet another 383 question...I know Im killin you guys...
[Re: rss]
#973351
04/19/11 05:38 PM
04/19/11 05:38 PM
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Joined: Apr 2008
Posts: 301
California
court9155
OP
enthusiast
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OP
enthusiast
Joined: Apr 2008
Posts: 301
California
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It is hard to find a low mileage 68-69 383 Im sure, let alone one that doesnt need bored.
I do have one that is SAID to have 35k miles on it and has been sitting on a pallet since 1975 SUPPOSEDLY. I wasnt too sure of this claim, but after selling the HP manifolds, carb, air cleaner and valve covers I believe it. The motor looks to be in great shape. Probably a runner but definitely a good candidate for a brush hone, rings, polished crank and bearings.
Dan
67 charger
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Re: Yet another 383 question...I know Im killin you guys...
[Re: superbyrd]
#973353
04/19/11 06:19 PM
04/19/11 06:19 PM
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Joined: Jan 2003
Posts: 75,020
U.S.S.A.
JohnRR
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I Win
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Quote:
all 5 of mine are 50K or less,still showing cross-hatch in the cylinders,just a black carbon ridge at the top. but,mine have a good home,and are not leaving the nest anytime soon.....
But they are underpowered junk , why would you keep them ? 
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All the ones I remember working on( a long time ago) were no where near zero deck, let alone above 
