Thread: different connecting rods?
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10-21-2006 08:03 AM #1
different connecting rods?
Hi all of you,
I have a question.
I can't get my engine to stop vibrating. I just rebuilt it, it vibrated before and I rebuilt it completely. Top end is new, heads fine, pistons new, the only old parts are: Connecting Rods, Crank, Block. It doesn't idle very well, but I guess that' still a setting issue. But it vibrates slightly all the time, and when it gathers RPM it keeps on vibrating in a sort of slow but strong VVVRRRRMMMM....VVVRRRMMMM.... way, getting faster with engine speed. I made double sure all clearances and everything were right.
BUT: I have two different types of conrods. 5 of one type, 3 of the other. They all weigh the same (+/- 1 gramm) but the three have heavier big ends. Can that cause vibration that strong? It's only about 20 gramms more on the big ends... Didn't think that would matter with a big heavy crank like in an SBC...
Could it really be the con rods? Or would a not balanced crank do that? All in all, I have no idea where those parts came from, they were in the engine, which had been rebuilt before.
Hope somebody knows about the effects of incorrect balancing...
Thanks, Max.
PS: It vibrates even without TC and Fan assembly attached, balancer is new.Harharhar...
on small cars yes. but fat fender cars are pretty much the same in size and weight as the donor car. i found s10 brakes work great on fat fender and pickups. a deuce will just need manual brakes...
Time for brakes