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Can you guys rate my 383 build...
#960648
03/27/11 11:35 PM
03/27/11 11:35 PM
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Joined: Dec 2008
Posts: 2,782
USA
JoesMopar
OP
master
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OP
master
Joined: Dec 2008
Posts: 2,782
USA
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Ok, I have parts, so this is pretty much the way the build is going to be, not much in the room of changing things around now... I did as much research as I could....with the help of you guys  Anything with a "?" beside it is still not for sure...so I would need some input 383 .030 over std rod/mains ARP rod/main/head bolts Edelbrock closed chamber heads Cometic .027"/4.35" head gaskets (?) SpeedPro 2315 (1.920" CH) stock deck height (squared to crank) balanced assembly Comp XE 274/286 cam/lifters Performer RPM intake 650 Thunder Series Carb (?) MP igniton conversion kit Factory HP manifolds (?....any issue with the angled plug heads? would rather not use headers) Comp Double Roller I'm getting 9.57:1 CR ASSuming the piston is .01 in the hole with the 2315 pistons. That would also figure a .037" quench as well....correct? How does this sound to you guys?
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Re: Can you guys rate my 383 build...
[Re: JoesMopar]
#960649
03/27/11 11:45 PM
03/27/11 11:45 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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sounds pretty good. I'd mockup & check actual deck height b 4 ordering the cometics to keep your quench. What octane? the angled plugs MAY pose a prob (someone will chime in). I am not a cam guy. I'd get a 3" mandrel ex system from the HP manifolds back like Andy did on his build (it's in the archives) & will need X pipe/proper muffs/rear resonators to keep the noise manageable. Yes .037" quench is perfect (measured in each hole)  . Dont balance till you get the valve reliefs and or piston deck milled (if needed) EDIT you'll prob want the CR to b higher (forgot about the alum head effect)
Last edited by RapidRobert; 03/28/11 12:44 AM.
live every 24 hour block of time like it's your last day on earth
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Re: Can you guys rate my 383 build...
[Re: JoesMopar]
#960651
03/28/11 02:27 AM
03/28/11 02:27 AM
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Joined: Aug 2007
Posts: 902
Seattle, WA
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super stock
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super stock
Joined: Aug 2007
Posts: 902
Seattle, WA
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Quote:
SpeedPro 2315 (1.920" CH)
Just curious, have you already purchased the pistons? According to Mancini Racing, these pistons have been backordered for several months now. Summit has some, but the 30 over ones are about $500 for a set of eight. Evidently they have more of the 40 and 60 over pistons, as those are $40 per piston instead of $60 for the 30 over slugs.
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Re: Can you guys rate my 383 build...
[Re: RapidRobert]
#960655
03/28/11 10:38 AM
03/28/11 10:38 AM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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Quote:
sounds pretty good. I'd mockup & check actual deck height b 4 ordering the cometics to keep your quench. What octane? the angled plugs MAY pose a prob (someone will chime in). I am not a cam guy. I'd get a 3" mandrel ex system from the HP manifolds back like Andy did on his build (it's in the archives) & will need X pipe/proper muffs/rear resonators to keep the noise manageable. Yes .037" quench is perfect (measured in each hole) . Dont balance till you get the valve reliefs and or piston deck milled (if needed) EDIT you'll prob want the CR to b higher (forgot about the alum head effect)
Why would he need to mill the piston decks ??? You're the only loon I know that is milling quench dome pistons for use with a closed chamber head. (but I do have to admit I suggested doing that to a person doing a 440 that has quench head pistons already because his deck heights are all over the place due to crank stroke difference and/or connecting rod difference)...
Unless he has serious piston to wall clearance I can't see a piston that is .010 in the hole tipping enough to come above the deck and hit a head that is .027 above it.
One thing he does need to check is piston to valve clearance because those pistons don't have valve reliefs.
As far as the build , bigger carb (a 750 but NOT the performer series Ebrock carb) and a different cam, something in a solid , like the MP .528 .
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Re: Can you guys rate my 383 build...
[Re: JoesMopar]
#960662
03/29/11 01:01 AM
03/29/11 01:01 AM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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You don't HAVE to run higher compression with the aluminum heads, just you are able to run a bit higher compression without detonating. Quote:
The gear is a 3.23 with a 2500 stall. That cam should be just a little larger than a stock HP cam, so I'm not sure why 10.5:1 CR is really needed?
That cam is notably bigger than a stock HP cam, and with 9.5 compression, 2500 stall and 3.23 gears, it will be soft in the bottom. Now if you had 440 cubes, 9.5 compression, 2500 stall and 3.73 gears I'd say you'd be okay with that cam. It's very easy to over cam a 383 and like I said, a lot of guys on here are having good luck with the comp xe268 in their 383's. I think a couple guys from here even have youtube videos of theirs.
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Re: Can you guys rate my 383 build...
[Re: DaytonaTurbo]
#960663
03/29/11 01:15 AM
03/29/11 01:15 AM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
You don't HAVE to run higher compression with the aluminum heads, just you are able to run a bit higher compression without detonating.
Quote:
The gear is a 3.23 with a 2500 stall. That cam should be just a little larger than a stock HP cam, so I'm not sure why 10.5:1 CR is really needed?
That cam is notably bigger than a stock HP cam, and with 9.5 compression, 2500 stall and 3.23 gears, it will be soft in the bottom. Now if you had 440 cubes, 9.5 compression, 2500 stall and 3.73 gears I'd say you'd be okay with that cam. It's very easy to over cam a 383 and like I said, a lot of guys on here are having good luck with the comp xe268 in their 383's. I think a couple guys from here even have youtube videos of theirs.
 The Crower 271HDP, 222/234@.050 .486/.496 lift 112 centers comes highly recommended too...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: Can you guys rate my 383 build...
[Re: JoesMopar]
#960664
03/29/11 02:46 AM
03/29/11 02:46 AM
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Joined: Aug 2007
Posts: 902
Seattle, WA
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super stock
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super stock
Joined: Aug 2007
Posts: 902
Seattle, WA
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Quote:
I may save the 2315's for another build since they were basically given to me (not free but cheap)
If you decide to go with the KBs and want to unload the 2315s let me know. I'm in the middle of my own 383 build at the moment. Pretty similar to yours but I'm using my original open chamber 906 heads. Good luck with yours.
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Re: Can you guys rate my 383 build...
[Re: JoesMopar]
#960665
03/29/11 08:21 AM
03/29/11 08:21 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I ASSumed the piston depth based off a measurement I took from the original pistons and then added the CH of the new pistons. I know I'm not going to know for sure until I get it back from the machine shop, which is why I haven't ordered the head gaskets yet.
I may go with headers, not sure which ones would fit or not. This is a manual brake, manual steering '68 Sat.
The gear is a 3.23 with a 2500 stall. That cam should be just a little larger than a stock HP cam, so I'm not sure why 10.5:1 CR is really needed?
I'm not going to be racing this thing at the drag strip. It's a pretty cheap car that I don't have much money invested in and felt like making something to cruise and go fast in every now and then.
I usung the Summit headers on my 440-6. They fit w/o any problems. Even when I had PS. I'm also using a mini-starter. The 268 comp cam might be a better choice w/ your combo or the solid 528 if you don't mind spending a few more $$$ on adjustable rockers.
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Re: Can you guys rate my 383 build...
[Re: Mr.Yuck]
#960667
03/29/11 10:03 AM
03/29/11 10:03 AM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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Quote:
Quote:
I ASSumed the piston depth based off a measurement I took from the original pistons and then added the CH of the new pistons. I know I'm not going to know for sure until I get it back from the machine shop, which is why I haven't ordered the head gaskets yet.
I may go with headers, not sure which ones would fit or not. This is a manual brake, manual steering '68 Sat.
The gear is a 3.23 with a 2500 stall. That cam should be just a little larger than a stock HP cam, so I'm not sure why 10.5:1 CR is really needed?
I'm not going to be racing this thing at the drag strip. It's a pretty cheap car that I don't have much money invested in and felt like making something to cruise and go fast in every now and then.
I usung the Summit headers on my 440-6. They fit w/o any problems. Even when I had PS. I'm also using a mini-starter.
You shouldn't compare a 440 and starter clearance using a mini starter to a 383 , the headers are closer to the block on the 383. I TRIED to use a mini starter with a set of 1 3/4 primary headers and I couldn't get the header on the engine with a mini starter .
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). What I'm doing w my 451 & which would b my suggestion is to go w the right KB's & mockup the short block & see what you actually have (deck and quench plateau height) & in conjunction w what is avail for gaskets machine for quench and the right CR for your app w your intended octane/cam (though I am not sure what CR to shoot for) then dissassemble/machine/reassemble/recheck/dissassemble and balance it/reassemble 
. This'll give you a long block that will not need to be touched and you can then play/experiment w the external additions and know that your foundation is perfect