Harmonic balancer HELP

[Nevada dan]

Can anyone identify this balancer, it’s on my 426 hemi with a blower , I can’t find where the pulley hub came from that fits to it
It has BDS parts up top but that didn’t help
The center bolt loosened up and broke the balancer
It looks stock but has a stud going into the pulley and the pulley hub has 2 studs that go in the balancer

 

[RemCharger]

I can't help ID it, but my understanding was that you need a crank hub instead of a balancer.

Sure looks like a stock bb internal balance.
Agree with the crank hub, from what I've read.
And maybe try getting the whole contraption balanced before bolting it all back together

 

[pnora]

You most likely have crank damage to. Anytime I have seen the balancer loose it also wore the crank. You will need to pull the cover and measure the crankshaft.

 

[steve340]

I have done a number of supercharged engines over the years but I always use a harmonic damper.
I think a street engine needs to have a damper to deal with the torsional vibration.
There is a company in Australia called Romac and I believe you can get them in the USA.
They use a steel hub that is far stronger than stock iron. They also make a variation for blown engines that has two keys and is reinforced for blower drives. I have used the Ford and Chev ones but I don't know if the do one for a Mopar.
They are not the only manufacturer of high performance dampers I just mentioned them because of the blower variation.
pnora is dead right - check the snout of the crank very carefully. If you pull the engine get the crank crack tested.

 

[Nevada dan]

Good advice from you guys
The crank was untouched, luckily
I don’t know if all the internals were balanced and if I go with a hub will it screw me, I really don’t want to pull the engine and start over if I don’t have to
I don’t like the setup but I was thinking a fluid dampner and take it and the pulley to a machine shop or pull it all and start over

 

[pnora]

Good advice from you guys
The crank was untouched, luckily
I don’t know if all the internals were balanced and if I go with a hub will it screw me, I really don’t want to pull the engine and start over if I don’t have to
I don’t like the setup but I was thinking a fluid dampner and take it and the pulley to a machine shop or pull it all and start over

Is that what your eye told you or did you measure it?

 

[Nevada dan]

Michrometer

 

[Black_Sheep]

Looks a lot like a 66-71 Street Hemi balancer

Harmonic Dampers 440 Source.com

 

[Cranky]

Michrometer

Dial caliper or an actual micrometer?? No worries....most machinists kain't speeel machinist lol

@HEMI-ITIS

 

[Gunner1]

Even though a 6/71 or 8/71 pulse load the blower belt, the belt does act as a torsional damper. When I worked at Scat Cranks we would deep drill the damper bolt hole all the way into the front main. But not into the oil passage. Then using a long stud torque a hub in place. That puts the entire cranks snout into compression and lessens deformation at speed. Common practice on circle track cranks not so much on short duration drag cars. The owner there did not recommend fluid style dampers.

 

[DanielSlocum]

personally.....im afraid to use any 50 year old dampers thinking there is a good chance that the bonding agent will fail and cause things to slip and/or fly apart.

 

[HEMI-ITIS]

I was told to use the hub also,but after 2 hub failures installed an ATI damper and have been good for over 20 years. My opinion,,use an ATI!

 

[Gunner1]

ATI;s were at the top of our list of preferred dampers.

 

[Gunner1]

I was told to use the hub also,but after 2 hub failures installed an ATI damper and have been good for over 20 years. My opinion,,use an ATI!

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Your car is so very Bad Azz..

 

[Nevada dan]

Thanks everyone especially hemi-itis

 

[Cranky]

Thanks everyone especially hemi-itis

Figured if anyone knew he would.....

 

[Nevada dan]

Hey cranky
I bought that car with the blown hemi about 40 miles from where you live
Damon Texas that is if your in Pasadena Texas