welding balance weights

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Re: welding balance weights

Post  Curt on September 19th 2014, 6:35 pm

And to add, it's a cast crank. You probably won't be reselling it if used for racing purposes.
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Re: welding balance weights

Post  Rmk Boss9 on September 19th 2014, 7:17 pm

Paul Kane wrote:
rmk57 wrote:I've never seen a crank balanced like this before and would some expert opinions on using this up to 6500 rpm.  It's a 4.15 cast Scat crank.
If it's correctly balanced and that's where the weight was needed then it's perfectly fine for your appplication and a complete non-issue.


Which parts (piston/rod) were used for the rest of the rotating assembly, and exactly how old is the crankshaft?

The crank was brand new.
Scat I-beam rods and SRP -28cc pistons.

I'm probably going to go ahead and use it as is. It just isn't what you expect to see when you unpack your new crankshaft.


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Re: welding balance weights

Post  rmk57 on September 19th 2014, 8:14 pm





The other weld which looks prettier than the other one and a copy of the balance card.

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Re: welding balance weights

Post  kim on September 19th 2014, 9:56 pm

cranks get welded on all the time. One of the ways to repair a journal... weld, and turn back down. Original offset stuff,, add weld and move center.. Back in the stone age of this sport, China didn't cast one of every stroke out there. People remanufactured what was available.

We would weld in the Mallory slugs in the throughs..

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Re: welding balance weights

Post  dfree383 on September 20th 2014, 12:13 am

To be fair i have seen a lot uglier work

Some major Swiss cheese drilling and I do recall a mopar crank once with nuts welded to it in a number of places......
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Re: welding balance weights

Post  6t6mustang on September 29th 2014, 6:44 pm

I would not put that in any engine with my name on it.. "if" it comes off, it will do major damage to a lot of stuff, I won't even let a balance shop end press weight (radially).. also, that is mig welded, tungsten to cast with er70.... nope. No
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