Internal Balanced 360 Question...

[myasylum]

O.k. I got my stroker internally balanced, but now do I need a 318/340 Harmonic Balancer, and Flexplate?

Would a stock 318/340 do fine? I'm looking for budget parts now.

Thanks!

 

[crackedback]

Not sure I should answer here... :-D

Yes, you need to get a neutral balance damper, flexplate and converter.

 

[myasylum]

Wouldn't a 318/904 combo including the converter have those neutral balance parts to swap?

Thanks.

 

[Blownfish]

O.k. I got my stroker internally balanced, but now do I need a 318/340 Harmonic Balancer, and Flexplate?

Would a stock 318/340 do fine? I'm looking for budget parts now.

Thanks!

Yes, you will need the balancer and converter from a 318 or pre 72 340 the flexplate will be the same. The mid/late 72 and 73 340's were externally balanced and used the 360 balancer and converter.

 

[GTXperience]

I would just spend the extra money on new solid parts. A new SFI flexplate is approx. $20, a new SFI dampner is around $90- $160. The cost of the converter will depend on what you need/get. Again, I would just save up and get the right parts the first time.

 

[crackedback]

Yes, you will need the balancer and converter from a 318 or pre 72 340 the flexplate will be the same. The mid/late 72 and 73 340's were externally balanced and used the 360 balancer and converter.

The externally balanced weightings were.

340 balanced at 4.22 oz

360 balanced at 19.79 oz

The balancer/flywheel/converter weighting were different between the two.

 

[moper]

318 parts will interchange, the flexplate is anything you can dig up that isnt B&M, and the convertor should have no weight on the crank hub side of it. (Might have small weights on the perimeter of the trans side if it's a stock unit)

 

[Blownfish]

The externally balanced weightings were.

340 balanced at 4.22 oz

360 balanced at 19.79 oz

The balancer/flywheel/converter weighting were different between the two.

That is correct, I meant to say the 360 "style" balancer. Although I have seen the manual flywheels listed in a few books as the same but I never used one. I've always tossed the 72-73 340 cranks and used a pre 72 steel 318-340 cranks in them.

myasylum, you will be fine using the parts from a 318 on your 360 a used balancer will be also fine, just make sure the rubber isn't dried out or cracking.