crank support ?

Discussion in 'Manton Push Rods Top Alcohol Tech Questions' started by loosecannonliebi, Jul 20, 2008.

  1. loosecannonliebi

    loosecannonliebi New Member

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    I don't run a crank support and I have been having main bearing issues only on the center mains front and rear are good? Should I buy one:confused:This is the only thing I can think of to solve the problem, I run approx 40 pound boost' tired of buying bearings. Looking for some opinions from the one's who know what the heck there doin.:D
     
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  2. jonimus333

    jonimus333 New Member

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    Bearing prob.

    Dont know about the support, but I would check line bore and crank for straightness Don
     
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  3. secondwindracing

    secondwindracing top alcohol

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    I think it's a line bore problem..crank support is great for the front bearing and for the front of the snout of the crank...check line bore..Dave
    www.myspace.com/daveloweswr
     
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  4. moparchris440

    moparchris440 Member

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    keith black makes a side oiler kit
     
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  5. loosecannonliebi

    loosecannonliebi New Member

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    I had fresh line bore new mains and new crank 6 passes in and it happened I even turned it way down and lowered shift points don't know what else to do?
     
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  6. planbmotorsports

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    What kind of motor is this that you are haveing issues with.
     
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  7. Dale H.

    Dale H. Member

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    The main brgs. that take the most abuse are number 2 and 3 because the combustion pressure pushing down on the crank and the blower drive pulley pulling up on the crank nose.A support should help your problem.
     
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  8. loosecannonliebi

    loosecannonliebi New Member

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    It's a 496 bbc 4.25 stroke 14-71 hh
     
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  9. planbmotorsports

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    A bearing support should take care of this problem typical of a chevy. I had issues with 2 and 3 mains on my old chevy deal and when I finally spun number 2 main I went to a crank support and never ever had an issue.
     
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  10. Chuxluv

    Chuxluv Member

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    I had a bearing problem with the main bearings on a BBC till I installed a crankshaft windage tray. The tray keeps the oil from being suspended in the upper part of the block and from the oil being thrown into the valley. I could see on the data system that the oil pressure would drop in the burn off and a 3rd of the way down the track. Hope this helps and it can't hurt. Chuck
     
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  11. Mike Canter

    Mike Canter Top Dragster

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    We use a front crank support and we find that it stops our crank from flexing and gives more life to the main bearings especially number one and two.
     
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  12. SoDak

    SoDak Active Member

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    We used to run BBC's LF HH 14's.
    When we didn't have a handle on our fuel systems we would ruin the main bearings at 12 runs.
    We would also knock the porcelain out of the spark plugs, spit head gaskets out, etc.
     
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  13. loosecannonliebi

    loosecannonliebi New Member

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    Thank you all for the help and ideas I'm gonna give both the support and a windage a shot.
     
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  14. blown375

    blown375 New Member

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    check your private messages!
     
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  15. craig moss

    craig moss Member

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    crank support

    rbs supercharger sells a nice set up it is a knock off of the rcd I bought one a couple of years ago no problems:cool: and a lot cheaper
     
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