Flywheel Ring gear

[Smith]

My ring gear seperated from the flywheel, any good ideas to prevent this in the future? Is this a common failure? Anybody have experience with this? Does this happen with the larger engines? Appreciate any input, thanks

 

[fx1mark]

Clearly the flywheel has been lightened. I think @speedysprocket is the man to ask.

 

[WFO Speedracer]

Have it tig welded onto the hub

 

[harrymank]

You are missing a tooth too

 

[WFO Speedracer]

Good eye I missed that

 

[Myself]

I've seen that happen on a couple of bone stock 760's through the years. I just press them back on and make small 1/2" stitch welds with the wire welder in 6 places

 

[WFO Speedracer]

I've seen that happen on a couple of bone stock 760's through the years. I just press them back on and make small 1/2" stitch welds with the wire welder in 6 places

Thats what I did on the last one, tig would be better but no one is pulling the flywheel cover off to look at it.

 

[Sparkplug]

3 inches of weld on a flywheel is a tin of added weight and heat. I imagine some taper lock green loctite with a hot and cold press fit would work just as well with less chance of damage or imbalance.

It's like 2500 pounds shear or something crazy. Not weld strength. But plenty for stuff like that.

My bad. Its.acrually 4500 psi shear

 

[JetManiac]

My ring gear seperated from the flywheel, any good ideas to prevent this in the future? Is this a common failure? Anybody have experience with this? Does this happen with the larger engines? Appreciate any input, thanks View attachment 440523

Common with 760 flywheels, on stockers still in the 760 couch we have seen it many times, and on lightened ones as well. Weld or pin it. Try to do minimal welds spaced equally and with minimum heat needed.

 

[WFO Speedracer]

3 inches of weld on a flywheel is a tin of added weight and heat. I imagine some taper lock green loctite with a hot and cold press fit would work just as well with less chance of damage or imbalance.

It's like 2500 pounds shear or something crazy. Not weld strength. But plenty for stuff like that

My bad. Its.acrually 4500 psi shear

On the few I have seen when the ring gear slipped on the flywheel usually there was now metal missing on the flywheel it was so loose that sleeve retainer would not have held it on , who said anything about three inches of weld , i may have run three or four small beads evenly spaced probably an inch in total , last I heard the ski is still running just fine . would I do it on ab expensive stroker engine, nope but on a stock 701 yeah in a heartbeat.

 

[Sparkplug]

On the few I have seen when the ring gear slipped on the flywheel usually there was now metal missing on the flywheel it was so loose that sleeve retainer would not have held it on , who said anything about three inches of weld , i may have run three or four small beads evenly spaced probably an inch in total , last I heard the ski is still running just fine . would I do it on ab expensive stroker engine, nope but on a stock 701 yeah in a heartbeat.

6 half inch welds is 3 inches of weld.

I believe the green taper lock is good up to .010. And I think they have other ones that go up to .030

A small tack with a tig welder in like 3 spots prob wouldn't be too bad.

 

[WFO Speedracer]

Yes and twelve 1/4" welds is 3 inches or twenty four 1/8" welds, I did neither , if you have a point, if make it, if not stop pulling stuff out of thin air.

 

[Sparkplug]

Yes and twelve 1/4" welds is 3 inches or twenty four 1/8" welds, I did neither , if you have a point, if make it, if not stop pulling stuff out of thin air.

The post above you says he does 6 half inch welds dude.

 

[WFO Speedracer]

Ok I do finally see it after looking through the posts several times, I would say that is excessive but I bet it was on a couch, so does it really matter ?

 

[Myself]

I clock them all exactly across from each other as to keep a neutral balance.........no issues. For those who don't weld regularly, a 1/2" stitch weld with .030" wire that's a mere 3/16" wide, weighs almost nothing.......grams.

 

[Sparkplug]

I clock them all exactly across from each other as to keep a neutral balance.........no issues. For those who don't weld regularly, a 1/2" stitch weld with .030" wire that's a mere 3/16" wide, weighs almost nothing.......grams.

I don't weld regularly. But I hold a 6g unlimited in fcaw and smaw. And have done every single process I know of besides submerged arc and under water. But I won't ever call myself a pro, even tho I got paid very well to do it.

Grams being spun at 7k definitely matters. How much. That's up to you, your flywheel, and maybe your cases.

Spray weld the thing with .045 for all I care.

 

[JC-SuperJet]

6G all position with the Squirt Gun and the Stick upside down with a mirror?

 

[WFO Speedracer]

Yeah but can you JB weld ?

 

[DrewOregonian]

I have a lightened 760 flywheel I would sell. It was lightened by NewMiller.

I had an issue running it with my zeel so the ski wouldn’t charge. But ski ran great outside of that. Seems to be a normal issue for zeel and lightened flywheels….

If you have any interest. Let me know.

I’d do 100$ Shipped.

 

[Smith]

thanks but I have a spare already