2G New Crankshaft Questions for the 97 Eagle Talon

[FredRider]

Hi everyone. So I bought a new crankshaft for my engine I am rebuilding and I was wondering if I need to have it balanced and rotated or could I just install straight from the box?

I live in Clewiston, Florida so if I do do you guys know any shops near me that specialize in that type of work because I was told to go all the way to Tampa Florida to a shop called United Speed World. But it's a pretty far of a drive but if I can't find another shop if anything I will just have to make the drive there.

I've called other shops but they have no idea what an Eagle Talon is. Funny enough they kept asking me they knew the engine but kept asking me if it was from a Chevy block or a Ford so clearly they didn't

The crankshaft I got was a
190100 Manley Race Series 88mm Stroke 4G63/4G64 7 Bolt Crankshaft

 

[1990TSIAWDTALON]

I have to make a 1hr 15 min drive to the closest balancing shop in this area. I DO think it is worth it every time tho. Expect $300-500. If it's less, then good deal. My latest 4g motor and my SBC Monster both got balanced at Zac's Engine and Machine Shop in Erie KS.

 

[motomattx]

Inline four cylinder engines are component balanced, that is, the individual parts are balanced individually and then assembled. Your crankshaft, if it was well made, won't need any balancing from the machine shop, if its a cheap one you might want to just for peace of mind, but yours seems to be a decent brand. I wouldn't worry about it as long as you use good rods and pistons.

 

[FredRider]

Inline four cylinder engines are component balanced, that is, the individual parts are balanced individually and then assembled. Your crankshaft, if it was well made, won't need any balancing from the machine shop, if its a cheap one you might want to just for peace of mind, but yours seems to be a decent brand. I wouldn't worry about it as long as you use good rods and pistons.

These are the pistons I got

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I have to make a 1hr 15 min drive to the closest balancing shop in this area. I DO think it is worth it every time tho. Expect $300-500. If it's less, then good deal. My latest 4g motor and my SBC Monster both got balanced at Zac's Engine and Machine Shop in Erie KS.

Yeah the United Speed World charged me $235 my question is do I need to bring the pistons already assembled or will they do that there becuase he did tell me to bring the rods, pistons, rod bearings, crankshaft and piston rings

 

[motomattx]

They will assemble them for you generally.

 

[DSMPT]

he did tell me to bring the rods, pistons, rod bearings, crankshaft and piston rings

This is because you don't balance individually, you would have to do whole rotating assembly together. Usually each parts are already balanced more or less at each manufacturer like Motomattx said above, so you would be fine without it. What you are asking the shop is for more perfect balancing as the rotating assembly. It would be better for sure but not a must.
Always to have a Fluidampr/ATI damper would be beneficial, or/and at least set the pistons/rods weight by yourself also would be a plus if you want to save the money for balancing.

 

[FredRider]

This is because you don't balance individually, you would have to do whole rotating assembly together. Usually each parts are already balanced more or less at each manufacturer like Motomattx said above, so you would be fine without it. What you are asking the shop is for more perfect balancing as the rotating assembly. It would be better for sure but not a must.
Always to have a Fluidampr/ATI damper would be beneficial, or/and at least set the pistons/rods weight by yourself also would be a plus if you want to save the money for balancing.

Ok thank you for your suggestion! I will think about it and what is a Fluidampr/ ATI Damper? I had never heard of that.

 

[DSMPT]

Ok thank you for your suggestion! I will think about it and what is a Fluidampr/ ATI Damper? I had never heard of that.

Harmonic balancer. The Fluidampr would probably be easier to have, for both installation and maintenance.

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[jed344]

I have not used that Manley crank but I have seen quite a few new out of the box be decently far off. Generally Eagle's. We had a brand new Eagle that was 11 grams off balance right out of the box a few years ago. The tell tale sign if the shop knows with our cranks is to ask about if they would use bob weights. Those are not to be used with ours. We even have factory cranks new or used balanced as the shop we use is great and gets them to within .5 gram usually. The rods, pistons, rings, ect. You can scale those yourself, usually they are quite close from my experience.

 

[FredRider]

The tell tale sign if the shop knows with our cranks is to ask about if they would use bob weights. Those are not to be used with ours.

So they shouldn’t use bob weights for balancing our crankshafts

 

[jed344]

Absolutely not. That is for v8 stuff, was a way back in the day to quick check if the shop had a clue with this stuff. Inline motors, no bob weights. I used to use a scale for rest of rotating assembly. Honestly now days we just balance the crank and do not bother weighing the other parts most of the time. We always add a harmonic balancer to any build. The ATI design is better at its job, but a much bigger pain when needing to service. We usually just use the Fluidampnr.