ballance crank?

[Snopczynski]

My engine guy told me it was a good idea to balance it after we had it lightened. The crank was taken apart and each piece was lightened and polished. I would guess you balance it when you reassemble it cause everything is a different weight.

[dajogejr]

My engine guy told me it was a good idea to balance it after we had it lightened. The crank was taken apart and each piece was lightened and polished. I would guess you balance it when you reassemble it cause everything is a different weight.

 

I'd buy that explanation...

 

Bairdy....the problem you're gonna find is someone who will ship out of state for a reasonable price.

I can have the crank trued and welded for you, if you do all the legwork for pricing shipping, etc, and include that...

[racer]

when you wled the crank the amount of metal put on the webbing is not enough to worry about throwing your crank off.

ehhh, not really. TIG, no filler.

 

No material lost or gained. :-)

[Bansh-eman]

ehhh, not really. TIG, no filler.

 

No material lost or gained. :-)

you sure its an autogenous weld? i thought they use fillers for them?

[RZBansheeMan]

No, filler isn't nescesary for every TIG weld that's done. On these cranks the pins are tight enough that it can be fused all the way around the pins, which basically the arc from the tip of your TIG torch, will basically melt the two metals together (fusing). As stated no material gained.

[blowit]

I would add that it is not necessarily material that is added or not added, but moved that becomes a problem in welding. To put it in lame terms, you may add 2 grams of mass at R1.220, but remove 2 grams of mass at R1.200. That can and will affect inertial forces enough to effectively say that the crank has an imbalance. Welding simply is not that precise. However, as stated, the small amount of imbalance does not create problems so role on. Just food for thought I guess.

 

Brandon

[FireHead]

My engine guy told me it was a good idea to balance it after we had it lightened. The crank was taken apart and each piece was lightened and polished. I would guess you balance it when you reassemble it cause everything is a different weight.

I'll sort of buy into everything being a different weight after machining and reassembling, but with caged ball bearings on the crank and a firing event every 180 degrees, the crankshaft essentially dynamically ballanes itself.

 

I suppose we can leave it at you engine builder says one thing and I say another. :thumbsup:

[Snopczynski]

Im not a spring chicken either, it makes sense to me what he told me. You also have to realize something, I was on the quest for the smoothest and most powerful 350 in the world! :biggrin: So anywhere I could put the money, I did! Some people said when I would ride it, money would just blow out the exhaust.

[RZBansheeMan]

Im not a spring chicken either, it makes sense to me what he told me. You also have to realize something, I was on the quest for the smoothest and most powerful 350 in the world! :biggrin: So anywhere I could put the money, I did! Some people said when I would ride it, money would just blow out the exhaust.

 

If you don't mind me asking, how much did you have into lightening and balancing the crank ?

I would be interested in doing such to a 4 mil if wasn't going to take a small loan to do it.

[Snopczynski]

It was lightened, trued, welded, and balanced for $350.00

 

When we got it back, the thing was unbelievable looking. I almost didn't want to put it in the engine cause it would have looked good on my cofee table.

Edited September 8, 2007 by Snopczynski

[RZBansheeMan]

WOW, that doesn't sound all that bad. Their site had so many different options and prices it was kinda hard to follow.

 

After I get some current debt taken care of and get back on track of things This is something I would consider along with having the flywheel lightened and balanced.

 

Do you know apprx. how much weight was shaved from the crank or did Falicon say ?

Edited September 8, 2007 by RZBansheeMan

[Snopczynski]

Oh, I forget this. After you have the flywheel lightened, you have to send it to them to be balanced on the crank as a complete assembly.

 

I cant remember how much weight it was. But we had my crank and another one that was exactly the same before we had it done. If you held one in each hand, it was an obvious difference in weight, and the difference was pretty big.

[racer]

you sure its an autogenous weld? i thought they use fillers for them?

Sure, you can use filler. If you have a hole that needs to be filled. But since the crank is an interference fit, you shouldn't really have any holes. haha.

[Bansh-eman]

Have any of you guys seen that new stuff that I think was crane cam is doing now? You can send in crank cams whatever, and they hit it with the tiny beads and it smoothes out and strengthens pretty much any metal. They will only do it for new items they cant be run already. But they had a demonstration of some parts that had some pretty gnarly abuse and they looked better then brand new. They claim that the metal is so smooth once the process is done that metal on metal parts are relatively taken to the point that there is no friction.

 

 

edit: mikronite.... thats what it called, couldnt think of it so i had to google it

Edited September 8, 2007 by Bansh-eman

[racer]

Wow, that's some pretty neat stuff.