Crank pulley mod

[Jordan_R]

Finally got a chance to turn the pulley down. New weight is 5.01lb. That's over 1.59lb of metal removed or roughly 24% of the original pulley weight.
Fun fact, the pulley came from Ford .030" off-center of the core. I'm guessing this is from the rubber dampener curing slightly off. It might not sound like much but .030 is enough to visibly see wobbling on a lathe.
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Good stuff man, when can I send mine your way? Asking my fab guy now if he can get her done

 

[Ecoboost_xsport]

Finally got a chance to turn the pulley down. New weight is 5.01lb. That's over 1.59lb of metal removed or roughly 24% of the original pulley weight.
Fun fact, the pulley came from Ford .030" off-center of the core. I'm guessing this is from the rubber dampener curing slightly off. It might not sound like much but .030 is enough to visibly see wobbling on a lathe.
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Too bad there wasn't a way to get the thing dead nuts centered and get rid of that .030" difference. I guess it could be made from scratch (out of billet) if somebody had the time and/or resources...

 

[skyshadow07]

I think the vulcanized rubber takes up the .030" of slop when the engine is running. If made in solid aluminum I could CAD a replication of the stock and have it milled out of billet. Would lose all harmonic dampening abilities though. But would also probably be like 2lbs total.

Jordan, I'll DM you.

 

[skyshadow07]

Installed! Here is the old one next to the lightened one. I installed it with downpipes and ester core oil so I can not tell if it made a difference. I mean, laws of physics says it did.

 

[Ecoboost_xsport]

You run ot through its paces yet? Haven't noticed any weird vibrations or harmonics?

I wouldn't mind having you do this for me to at some point if you're into doing this for those of us who send you one to modify...

 

[skyshadow07]

It feel smooth. I can't feel any vibrations or anything that wasn't there before.

 

[skyshadow07]

6 month update, still no problems at all. Been on long trips, ran the **** out of the car.. no issues at all.

 

[501SHO]

I would be interested in having you do one for me. How much would you charge?

 

[Sgtmeatsauce1]

Subscribe...
Lightening the flywheel on my regal gs made a huge difference

 

[skyshadow07]

I'll do it for $150 if you send me back your pulley. Or make it $250 to cover the cost of a pulley. Just DM me if you want one. I'll need to know if your car was built before or after Aug 7th, 2016.

 

[skyshadow07]

Almost two years later, absolutely no problems.