Main bearing spacers
#2412979
12/04/17 10:32 AM
12/04/17 10:32 AM
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Joined: Apr 2004
Posts: 428 Mountain City, TN
JesseR
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mopar
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OP
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Who here has ever used bearing spacers in a rb block? I have a tall deck mega block and a kryptonite b crank. Any real world experience with this? This would be a nitrous combo over 1000hp
82' dodge pickup with a 499 low deck
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Re: Main bearing spacers
[Re: JesseR]
#2413024
12/04/17 12:54 PM
12/04/17 12:54 PM
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Joined: Mar 2011
Posts: 3,171 Michigan
A727Tflite
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Direct Connection used to sell them back in the day for small blocks, don't recall if they offered them for anything else. No issues if everything is to spec. But not sure if I would use them in your app.
Last edited by Transman; 12/04/17 12:55 PM.
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Re: Main bearing spacers
[Re: cudaman1969]
#2413047
12/04/17 01:48 PM
12/04/17 01:48 PM
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Joined: Apr 2004
Posts: 428 Mountain City, TN
JesseR
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My thoughts exactly, I’ve seen this done in some high hp chevys, so I don’t see why it won’t work for a Chrysler, I’ve just never heard of anyone doing it, other than in a small block mopar
82' dodge pickup with a 499 low deck
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Re: Main bearing spacers
[Re: Porter67]
#2413067
12/04/17 02:26 PM
12/04/17 02:26 PM
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Joined: Apr 2004
Posts: 428 Mountain City, TN
JesseR
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http://www.yellowbullet.com/forum/showthread.php?t=347954This is the only info I could come up with on the subject, I certainly wouldn’t want to try it, if it’s something that hasn’t been done very much, and it doesn’t appear to be very common at all. I’m a small block guy that’s just acquired a few decent big block parts, so my knowledge with them is very limited
82' dodge pickup with a 499 low deck
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Re: Main bearing spacers
[Re: JesseR]
#2413070
12/04/17 02:27 PM
12/04/17 02:27 PM
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Joined: Jan 2003
Posts: 13,492 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
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Like cudaman1969 said, used to see it done a lot with the 377" sbc combos (350 crank in a 400)...never really heard of any issues w/ them.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Main bearing spacers
[Re: JesseR]
#2413082
12/04/17 02:58 PM
12/04/17 02:58 PM
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Joined: Jan 2003
Posts: 13,492 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,492
Marion, South Carolina [><]
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FWIW Jesse, I wouldn't want to try it. Get an RB crank.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Main bearing spacers
[Re: Cab_Burge]
#2413093
12/04/17 03:28 PM
12/04/17 03:28 PM
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Joined: Apr 2004
Posts: 428 Mountain City, TN
JesseR
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Cab, to answer your question about wanting to wreck, the answer is no, I suffered that fate last year, I went through the quarter mile traps at 150 to discover I had no brakes. The parachute saved me from serious injury but my truck didn’t fare so well. I ask questions about stuff I don’t know or what I’ve never heard of, then I’ll decide for myself. It doesn’t sound like something I would want to try; again just an asked question.
82' dodge pickup with a 499 low deck
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Re: Main bearing spacers
[Re: JesseR]
#2413099
12/04/17 03:31 PM
12/04/17 03:31 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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I've done more than 25 Chevys with bearing spacers. It's no big deal. It won't cause a failure. If the main line is straight and your clearances are correct the engine won't know they are in there.
There being smart and then just going off the deep end. No way will bearing spacers cause a failure.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Main bearing spacers
[Re: madscientist]
#2413158
12/04/17 05:36 PM
12/04/17 05:36 PM
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Joined: Nov 2004
Posts: 3,547 Syracuse,NY
CompWedgeEngines
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I've done more than 25 Chevys with bearing spacers. It's no big deal. It won't cause a failure. If the main line is straight and your clearances are correct the engine won't know they are in there.
There being smart and then just going off the deep end. No way will bearing spacers cause a failure. I agree with the Madman here...no biggie. yes, it isnt the normal " available shelf part". Spacers can be made, and are, all the time for diesel repairs, BBC , BBF and others.If you make a sleeve, the bores are round, the proper crush is set, its no different than the block itself.Some guys use motor bearing sleeves to build up to an available beatring size. So, would I be afraid? absolutely not. ( as I always post, " if done correctly") Is it cost effective or inhibitive in your case, only you can answer that. hard to say
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: Main bearing spacers
[Re: BradH]
#2413160
12/04/17 05:37 PM
12/04/17 05:37 PM
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Joined: Jan 2004
Posts: 8,637 fredericksburg,va
cudaman1969
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IIRC, the bearing spacers for the SBC cranks were an over-the-counter part after years of racers like Bill Jenkins stacking their own to get the same result. No reason why it shouldn't work in my mind for a BBM; it's simply not something that anyone ever bothered to produce for the public. No, it was never produced because why would anyone put a 383 crank in a 440? Plenty the other way around though. I might be wrong but aren't the SS Hemi guys using smaller journals in their engines? I heard Honda bearings.
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Re: Main bearing spacers
[Re: CompWedgeEngines]
#2413178
12/04/17 06:23 PM
12/04/17 06:23 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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Washington
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I've done more than 25 Chevys with bearing spacers. It's no big deal. It won't cause a failure. If the main line is straight and your clearances are correct the engine won't know they are in there.
There being smart and then just going off the deep end. No way will bearing spacers cause a failure. I agree with the Madman here...no biggie. yes, it isnt the normal " available shelf part". Spacers can be made, and are, all the time for diesel repairs, BBC , BBF and others.If you make a sleeve, the bores are round, the proper crush is set, its no different than the block itself.Some guys use motor bearing sleeves to build up to an available beatring size. So, would I be afraid? absolutely not. ( as I always post, " if done correctly") Is it cost effective or inhibitive in your case, only you can answer that. hard to say And I didn't count all the Hemis that came in (and quite as few BBC's) that I had to oversize one or two mains and make up a sleeve or spacer to fix main bores that were ate up.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Main bearing spacers
[Re: madscientist]
#2413190
12/04/17 06:51 PM
12/04/17 06:51 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
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Bend,OR USA
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I guess I should have included on my first post don't try to do it yourself, unless your a competent machinest(SP?) I know several excellent parts fabricators with very good (expensive 5 axis CNC machines) equipment and skill that could make that part but I wouldn't do that as it would probably be cheaper and safer to buy a brand new excellent crankshaft instead of trying pay for and help engineer a one time set of adapter bearing spacers to save money I know my limits and skills, I have learned to not try to do things I'm not good at in many things, especially when flying as pilot in command and racing any cars I'm driving
Last edited by Cab_Burge; 12/04/17 06:52 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Main bearing spacers
[Re: madscientist]
#2413256
12/04/17 09:31 PM
12/04/17 09:31 PM
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Joined: Nov 2004
Posts: 3,547 Syracuse,NY
CompWedgeEngines
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Syracuse,NY
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I've done more than 25 Chevys with bearing spacers. It's no big deal. It won't cause a failure. If the main line is straight and your clearances are correct the engine won't know they are in there.
There being smart and then just going off the deep end. No way will bearing spacers cause a failure. I agree with the Madman here...no biggie. yes, it isnt the normal " available shelf part". Spacers can be made, and are, all the time for diesel repairs, BBC , BBF and others.If you make a sleeve, the bores are round, the proper crush is set, its no different than the block itself.Some guys use motor bearing sleeves to build up to an available beatring size. So, would I be afraid? absolutely not. ( as I always post, " if done correctly") Is it cost effective or inhibitive in your case, only you can answer that. hard to say And I didn't count all the Hemis that came in (and quite as few BBC's) that I had to oversize one or two mains and make up a sleeve or spacer to fix main bores that were ate up. You ever do them ,slice them,and use the cap grinder?
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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