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Author Topic:   Does it need balanced?
o5racer
Dirt Freak

Total posts: 402
posted February 05, 2005 06:03 PM  
My last engine had the rotating assembly balanced. This year I had to buy new pistons and punch a new block. The old pistons weighed 640g with the pins. The new pistons are 605g with pins. Is 35g enough difference that I should have it rebalanced or will it be ok?
Nick

stockcar5
Dirt Forum Champ
Total posts: 578
posted February 05, 2005 06:35 PM  
you should have it balanced. 35g is alot. it is better to be under rather than over on weight but i'd still balance it.

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Raz_900
Dirt Forum Champ
Total posts: 635
posted February 05, 2005 08:48 PM  
Yup, rebalance it.

I changed wrist pins in a V6 I had that were 45 grams lighter. They had to add to mallory slugs to the counterweights to balance it.


hobby10k
Dirt Freak

Total posts: 226
posted February 06, 2005 01:49 AM  
yes defanatly, you haft to think that when that thing is spinning 7000, that its a big difference, if it was in a street car it woudn't matter that much.

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racin78p
Dirt Freak

Total posts: 333
posted February 06, 2005 02:15 AM  
Balance, balance, balance. You'll race better not worrying about that engine ****pin' parts all over the track.

Hey hobby10k, you soooo short I can't see you,....

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racin78p
if it ain't fun, then don't run

o5racer
Dirt Freak

Total posts: 402
posted February 06, 2005 11:43 AM  
Bummer, That answers that.
Nick

leapinlizard
Dirt Freak

Total posts: 402
posted February 07, 2005 10:52 AM  
Most machine shops balaqnce within 1/2 gram. You can get away with a slight over balance though.

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