Author Topic: externally balanced crank  (Read 551 times)

Offline pyrojim

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externally balanced crank
« on: January 07, 2013 - 04:03:24 PM »

I posted this on another area of this sight, but I'm new and wasn't sure if I had it in the right place.

In the middle of rebuilding a 71 dart I bought last year, and the drive train was trashed. It has a 360 crate motor and a 904 trans, both smoked. The trans was rebuilt to a super street, the 360 needs a new crank. The thrust bearing had 1/8" + of play. So, heres my dilema. The 360 crank is externally balanced, motor guy says " balance the crank and weight it on the flex plate " the trans guy says "tell me the weight, and I'll transfer it to the torque converter" I'm not sure which way is right,or, if they're both right. Other options include buying a steel crank and balancing it internally but for 400 +/-  hp. I'm not sure I want to spend the extra $600.00 give or take. Any Ideas???
As always, Thanks.
Pyrojim




Offline Chryco Psycho

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Re: externally balanced crank
« Reply #1 on: January 07, 2013 - 08:32:15 PM »
I would lighten the con rods as much as possible , use a light piston & try to internal balance , but either of the other ways will work also , you can add weight to the flex plate or converter also

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