Balancing question
Thread Starter
Pro
Joined: May 2002
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From: Lengede
Balancing question
Have to lower my compression ratio and am planing on making a small dish into my pistons (-7cc). My rotating parts are although already balanced. How does the equal weight reduction on all pistons influence the balancing?
The pistons don’t rotate so there should be no difference if the pistons have the same weight.
Do I have to balance the rotating parts again?
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Re: Balancing question (vettef6)
If you remove material from the pistons to give you your -7cc dish, yes you need to rebalance again. The bob weights are calculated for each crank throw. The bob weight is the total weight of the piston, rings, rod and rod bearings. Plus the rods are weighed at both ends and balanced that way, the pistons are typically all weighed then balanced to the lightest piston.
Thread Starter
Pro
Joined: May 2002
Posts: 678
Likes: 2
From: Lengede
Re: Balancing question (vettef6)
Thanks for the info.
I was thinking of getting LT4 heads with 58cc and taking 7cc out of the pistons. Since I have to balance again, I will leave the pistons as is, and get AFR heads with 65cc CC’s.
Thanks
Arnold
I was thinking of getting LT4 heads with 58cc and taking 7cc out of the pistons. Since I have to balance again, I will leave the pistons as is, and get AFR heads with 65cc CC’s.
Thanks
Arnold
