Rebuilding engine, does it need to be balanced??

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Old Jun 21, 2006 | 05:46 PM
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Default Rebuilding engine, does it need to be balanced??

So I'm in the process of putting my motor back together. My setup consists of a closed deck H22 block, Benson sleeves, CP pistons, Eagle rods, ACL bearings. Boosting about 15-18 psi daily, 26+ psi at the track.

Now I got my stock crank balanced, but I was wondering if I need to get my block balanced with it all complete? Is this more necessary on a boosted motor vs. an N/A? A buddy of mine that does alot of V8's says that I should, but I've never read on here of anyone getting it done.

Any input? Maybe Earl can jump on this!


-Osman
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Old Jun 21, 2006 | 06:06 PM
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with all that invested in the block, why would you NOT balance it?

its not that much and it will defanately be worth the extra green
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Old Jun 21, 2006 | 06:28 PM
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Default Re: (planeman01)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by planeman01 &raquo;</TD></TR><TR><TD CLASS="quote">with all that invested in the block, why would you NOT balance it?

its not that much and it will defanately be worth the extra green</TD></TR></TABLE>

I dont even know the process of that. Where would they take off/add the extra weight to balance it? Do I need to have it completely assembled with lube? Also would any machine shop have the equipment to do that?
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Old Jun 21, 2006 | 06:35 PM
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Default Re: (ozzyman)

there is no such process
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Old Jun 21, 2006 | 06:37 PM
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Default Re: (ozzyman)

If your machine shop can’t do it, you need to find a different machine shop...

Balancing on these motors is completely different then say a V8. Do some searching and you will find tons of info.

Basically it’s not needed

platinum.

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Old Jun 21, 2006 | 06:56 PM
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Default Re: Rebuilding engine, does it need to be balanced?? (ozzyman)

i don't know if there is such a thing as "balancing a block", since you already had the crankshaft balanced, get it cleaned and polished, check rod balance, resurface the flywheel, and resurface the block. That's about all I can think of.
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Old Jun 21, 2006 | 07:10 PM
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Default Re: Rebuilding engine, does it need to be balanced?? (93c1sol)

well when you blue print a block your not balancing the "Block" your balancing its internals. Blueprinting is basically taking the weight of the reciprocating mass for each rod journal. Then you mock up the same weight with special weights, then clamp them to each rod journal on the crank the balance the crank.
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Old Jun 21, 2006 | 07:11 PM
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Default Re: Rebuilding engine, does it need to be balanced?? (93c1sol)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93c1sol &raquo;</TD></TR><TR><TD CLASS="quote">i don't know if there is such a thing as "balancing a block", since you already had the crankshaft balanced, get it cleaned and polished, check rod balance, resurface the flywheel, and resurface the block. That's about all I can think of.</TD></TR></TABLE>

I wasnt sure either. How does balancing a rod go about?
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Old Jun 21, 2006 | 07:18 PM
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Default Re: Rebuilding engine, does it need to be balanced?? (ozzyman)

You don't necessarily balance a rod...you just get them within a gram or two of each other...you weigh each rod on both big end and little...you then remove excess weight from the big end or small end of the rod if needed.


Modified by ludesleep at 5:55 AM 6/22/2006
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