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Re: 383 Guru's need help w/budget rebuild..
[Re: JohnRR]
#305015
05/03/09 07:51 AM
05/03/09 07:51 AM
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Joined: Jan 2005
Posts: 1,647
IL
71383beep
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Joined: Jan 2005
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If your buying pistons why would you choose the KB162? The KB400 is 11cc larger so it bumps the C/R almost a full point.... What truely puzzles me is why there are so many piston choices fo a 440 which Chrysler made about 750,000 of but nothing well thought out is avalible for the 383 which Chrysler made over 3,000,000 of.. Just a basic flat top with a C/H of 1.93 & 4cc valve notches would give 9.3ish with an 84cc chamber..
BTW I just did the math on KB162 & 80cc chamber, without decking the piston sits about .028 in the hole & that works out to 8.95 C/R 72cc will get you 9.65
And using 84cc chambers but KB400 pistons gives you 9.45
The KB162 is the LAST piston I would use in a 383 , and that would only be because I couldn't get a piston maker to make me a custom piston for my 383 build . If you don't deck the block and use the specified gasket for the steatlhs guess what ... STILL NO REAL QUENCH , the KB is .024 in the hole AND it has a CANYON like valve notch of 5cc, total overkill.
I'd use the speedpro 2315 before using the KB , the CH is .012 higher, not optimum quench but .050ish is better than over .060.
Diamond makes a piston but for some odd reason they have it's CH at 1.916 , between the KB and the speedpro but with smaller valve reliefs, but they are pricey, I'm going to have them make me a set that will have the piston .020 above the deck .
For stockish rebuilds the low deck mopar big block is treated like the red headed step child , not much different from the members of this forum who will tell you to just build a 440 .
 If I had to do it all over again I would get custom pistons or settle with the speed pro's.
I DO think this is why a lot of people just end up going the 440 route because they can't get their 383 to behave. They really are great engines.
The cost to rebuild is the same...so if you had a 440 laying around i would build it. But 440's don't exactly grow on trees and not everyone has a spare so in that case build the 383 properly and your won't be disapointed. 400 to 450 hp is not to hard to obtain and it will be a nice ride.
'73 GK6 Challenger Rallye - 340 4-Speed
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Re: 383 Guru's need help w/budget rebuild..
[Re: Brian Hafliger]
#305017
05/03/09 10:56 AM
05/03/09 10:56 AM
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Joined: Feb 2003
Posts: 1,679
Mansfield,Ohio
moparrulzzz
OP
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OP
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Posts: 1,679
Mansfield,Ohio
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Quote:
Sure you could go with the KB400 piston, but I prefer to zero deck the block and run the 162.
I'm not sure if he has all that in the budget or not...
Either way, with the 383, you use a small cam and advance it more than normal and it will reward you with a strong punch!
I'm in SoCal, at sea level, with craaaaaap 91 octane so I have to be very carefull of what I do. Not to mention we have 120°+ days in the summer 
I was figuring in the price of the pistons and decking the block in my budget.
And as far as buying a used motor which almost certainly I wouldn't be able to hear run makes me a bit nervous.
The only reason I am debating this build is I have a block, crank, and rods ready to go. I just need to make piston and head decisions, whether it be a set of Eddy's or the stealths which I would be able to re-use when I build my stroker, and finding some good used bolt on goodies.
As confusing as this is getting I might just say to hell with it and get the 440 block out and build it 
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Re: 383 Guru's need help w/budget rebuild..
[Re: moparrulzzz]
#305018
05/03/09 12:22 PM
05/03/09 12:22 PM
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Joined: Jan 2004
Posts: 358
Backwoods of NC
Topher
enthusiast
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enthusiast
Joined: Jan 2004
Posts: 358
Backwoods of NC
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What dollar amount are you looking to spend? If you want a cheap build for the 383 call Northern Auto Parts. You can get a rebuild kit with pistons, cam, lifters, bearings, freeze plugs, gaskets(minus valley pan), and oil pump for a 383 for a little over 600 bucks. I've used 3 of their kits, a 350 Chivie, 302 Phord, and a 383 a few years ago. The 383 is still running great and the guy drives the car everyday and has over 70,000 miles on it in 4 years. It's not a race engine by any stretch of the imagination, but it does crank and go every day. The kits have quality parts, and you can over size the pistons and bearings at no charge, and a cam and gasket upgrade will cost extra. The kit gaskets were McCord and sealed nicely.
With all this said, if you have your heart set on a stroked 440 why spend money twice on building engines? Go ahead and build the 440.
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Re: 383 Guru's need help w/budget rebuild..
[Re: moparrulzzz]
#305019
05/03/09 06:15 PM
05/03/09 06:15 PM
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Joined: Jan 2003
Posts: 75,082
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,082
U.S.S.A.
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Quote:
As confusing as this is getting I might just say to hell with it and get the 440 block out and build it
I'd be looking at this first , no sense dumping that much money into something temporary.
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Re: 383 Guru's need help w/budget rebuild..
[Re: JohnRR]
#305020
05/03/09 06:18 PM
05/03/09 06:18 PM
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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:
Quote:
As confusing as this is getting I might just say to hell with it and get the 440 block out and build it
I'd be looking at this first , no sense dumping that much money into something temporary.
How much more to build a 440 vs a 383 Than track down another block to stroke.... Better yet track down a 400 to stroke...
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Re: 383 Guru's need help w/budget rebuild..
[Re: 1_WILD_RT]
#305021
05/03/09 08:53 PM
05/03/09 08:53 PM
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Joined: Feb 2003
Posts: 1,679
Mansfield,Ohio
moparrulzzz
OP
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OP
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Joined: Feb 2003
Posts: 1,679
Mansfield,Ohio
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Quote:
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As confusing as this is getting I might just say to hell with it and get the 440 block out and build it
I'd be looking at this first , no sense dumping that much money into something temporary.
How much more to build a 440 vs a 383 Than track down another block to stroke.... Better yet track down a 400 to stroke...
Probally cost a bit more as the block I have needs machined no rods/pistons, I am sure the crank will be fine.
I guess I need to start a new thread as to what pistons I need to put in the 440. 
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Re: 383 Guru's need help w/budget rebuild..
[Re: Mr.Yuck]
#305023
05/03/09 09:11 PM
05/03/09 09:11 PM
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Joined: Feb 2003
Posts: 1,679
Mansfield,Ohio
moparrulzzz
OP
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OP
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Posts: 1,679
Mansfield,Ohio
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Quote:
if you are starting from scratch a 440 will cost you no more than a 383, or a 340 or a 400. If you have a running 383 toss a cam and t-chain set in it and let it rip. If not get the 440 done.
No the 383 is not running, bare block on the stand. I made a new post about buiding the 440.
I hope I get the same or better response as I did with this post. 
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