360 vibration ....help

Well I'll get slammed but the problem is in the damper or flywheel.

Before we got so smart tens of thousands of engines were built without any balancing going on...none.

I drag raced Chevy's and Pontiacs....none were balanced.

My first dozen or so Ford stock car engines weren't balanced. Never an issue.

Balancing was for Indy cars or USAC stockers running mile tracks.

I knew of one shop in my hometown of 800,000 folks that had an engine balancer.

Those new rods are very close on weight to each other...within a few grams. Same with the pistons.

I have sets of stock SBC and NASCAR rods in my shop that were never touched by a grinder to balance them and they are within a few grams of each other.

Pro shops will admit most of these full balance jobs are a great profit center but do little good in the average build.

Here come the slings and arrows....

Just one post about balancing tolerances...

balancing question - Page 2 - Don Terrill’s Speed-Talk