440 stroke in a 383. Good idea? Post your combo/opinion
#1387225
02/14/13 10:45 AM
02/14/13 10:45 AM
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Belvedere500ci
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Post your 383 combos with a 440 crank. I plan on using my 383 block with steath heads. I am considering using a 440 crank? Looking to give it some bottom end but dont want to sacrifice the car hooking every pass. Wondering what to expect for ET in my 3800lbs 4 door Belvedere. Undecided to use a flat tappet or roller cam. Any suggestions will be appreciated.
1967 Plymouth Belvedere II 383 1968 Plymouth Barracuda 383 2005 Ram 3500 5.9Diesel 1979 Dodge Power Wagon 360
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: 80fbody]
#1387228
02/14/13 12:24 PM
02/14/13 12:24 PM
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JohnRR
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Quote:
Is there an advantage over using a 440 block? Or is it convenience?
Working on my first 440 build & have certainly wondered if the 451 combo would be better for a race car
yes there is , if you have a tight engine compartment everything just fits better in a low deck package , the bad is the intake selection isn't as good as an RB, but one could fix that by using Stage 6 heads if they would work in the build plan.
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: JohnRR]
#1387230
02/14/13 01:13 PM
02/14/13 01:13 PM
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Joined: Oct 2006
Posts: 596 Mass.
80fbody
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Quote:
yes there is , if you have a tight engine compartment everything just fits better in a low deck package , the bad is the intake selection isn't as good as an RB, but one could fix that by using Stage 6 heads if they would work in the build plan.
Probably answers my question but... If a 446 & 451 were prepped the same, would they make the same power (at track) as they're displacements are close?
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: 80fbody]
#1387232
02/14/13 01:37 PM
02/14/13 01:37 PM
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Joined: Jan 2003
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JohnRR
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Quote:
Quote:
yes there is , if you have a tight engine compartment everything just fits better in a low deck package , the bad is the intake selection isn't as good as an RB, but one could fix that by using Stage 6 heads if they would work in the build plan.
Probably answers my question but... If a 446 & 451 were prepped the same, would they make the same power (at track) as they're displacements are close?
The 451 is just a compact 440 bored .055 over. but as dogdays says lighter rotating assembly helps the 451 , how much ????
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: dogdays]
#1387233
02/14/13 01:42 PM
02/14/13 01:42 PM
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Belvedere500ci
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383 combos guys. I built a 500 using a 400 block. I love the b blocks. Easier to get ahold of and better clearances. Who else is running 431-438s? How fast?
1967 Plymouth Belvedere II 383 1968 Plymouth Barracuda 383 2005 Ram 3500 5.9Diesel 1979 Dodge Power Wagon 360
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: 80fbody]
#1387234
02/14/13 01:52 PM
02/14/13 01:52 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
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Best option would be to use a 400 block (bigger bore). But, If you already have the 383 block, and aren't looking for a MAX effort, it should work just fine. You might cruise the local craigslist for a 400, though. I found a 400 long block out of a P/U not far from me for dirt cheap ($50 if I remember correctly!!). Advantages to the B motor are plenty: -lighter weight than an RB block. -smaller physical size makes headers and high rise manifolds easier to navigate -Same stroke rotating assembly in a "B" is substantially lighter in rotating mass than the RB combo i.e.: lighter pistons and lighter crank due to counterweights and main journals being cut down. -While not true with a 383 block, a 400 blocks bigger bore helps with unshrouding the valves, lets it breath better. -"B" blocks are generally understood to be a little stronger than "RB" blocks due to the lower piston sleeve. The extra stroke will pay big dividends in trying to move a 4-door belvedere, which is a hefty sled to say the least. Bottom line, the 3.75 stroke build will stomp the same 3.38 build every time! and the bigger the car your moving, the bigger the advantage gets. My combo is a .040 over 400 block with a 413 RB crank ground on center, good for 452 cubes. It also has Stealth heads (with no port work) and a street friendly solid flat tappet cam and Pump gas allowable 10.3:1 CR. It moves my Satellite along pretty good (although on this board, you're NEVER fast enough) and in general I'm real happy with what I was able to build on my budget. cutting the crank will be the only thing that is any different than a standard 383 build, and you'll want to find a machine shop that understands exactly what you're doing for this. Try to find a shop thats done it before. If you get the deer in the headlights look when you explain it, keep looking! You're looking for the guy that smiles and says "I've done that plenty of times!". This work shouldn't cost you much more than a few hundred bucks by itself. Whatever you end up doing, Have fun!
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: StealthWedge67]
#1387235
02/14/13 02:30 PM
02/14/13 02:30 PM
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Joined: Jan 2003
Posts: 75,062 U.S.S.A.
JohnRR
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Quote:
This work shouldn't cost you much more than a few hundred bucks by itself.
Whatever you end up doing, Have fun!
Unless you go to Boucher's in Rowley Ma. , they wanted $800 to cut the mains on my 440 crank , it would have been cheaper for me to ship the crank back and forth to michigan to have it done.
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: JohnRR]
#1387237
02/14/13 02:51 PM
02/14/13 02:51 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
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Quote:
Quote:
This work shouldn't cost you much more than a few hundred bucks by itself.
Whatever you end up doing, Have fun!
Unless you go to Boucher's in Rowley Ma. , they wanted $800 to cut the mains on my 440 crank , it would have been cheaper for me to ship the crank back and forth to michigan to have it done.
Pacific Machine in Tacoma WA: Grind forging tabs off my 413 crank, cut and finish mains to B dimensions, cut counterweights to 7.25": $190-
Given, this was 3 years ago, but I bet I could still have them do all that for less than $250.
I recently had a main-bearing issue, brought the crank back to them to have it magged, checked for true, and re-polished: $120.
Until I learn otherwise, John Tillits and Pacific Machine in Tacoma gets my business!
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: 80fbody]
#1387239
02/14/13 03:54 PM
02/14/13 03:54 PM
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Joined: Jan 2003
Posts: 6,266 Renton Washington
Triple Threat
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Whatever block you decide to use, ALWAYS ALWAYS sonic check and Mag before investing in parts.
-Dustin 67 Dart, 9 second, 392" G3 Hemi 68 Barracuda 340 F/SA
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: Cab_Burge]
#1387242
02/14/13 06:15 PM
02/14/13 06:15 PM
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JohnRR
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Quote:
I like taking the stock forged steel cranks and have them offset ground to 3.91 or 3.90, (whatever stroke you can get out of them) with BB Chevy rod size and B motor main size, works good in both 400 and 383 The 400 blocks have thicker main webs than the 440 and 383 do
You can get 3.91 out of a std b/rb rod journal , but doing all that grinding will get you close to the cost of a CCJ crank POSSIBLY a 4340 non twist forging ... but then adding in the cost of having it ground .010/.010 to fix it may blow that deal ...
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Re: 440 stroke in a 383. Good idea? Post your combo/opinion
[Re: JohnRR]
#1387243
02/14/13 06:17 PM
02/14/13 06:17 PM
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dogdays
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Mancini Overstock again, 4.15" stroke 383 main Eagle 4340 crank $500. Yeah, it's 10 under on both rods and mains, but so what? http://chucker54.stores.yahoo.net/384st6bo10ea.htmlR.
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