Has anyone ever heard of lightening a stock flywheel by way of machining?

 

yeah, they would drill out some of the metal in the back or shave it...

 

Are they reliable? I know a guy who does this and for 50 bucks I can have a 12lb flywheel. Sounds too good to be true. They must be prone to warping or cracking don't ya think?

 

I have run several stock lightened flywheels with now problems. It's safe if you only drop to 12 or so pounds and have it balanced afterwards.

 

its not drilling... they turn it on a lathe. a drill is then used to balance it.

I've been running a 13lb lightened stock flywheel (b series flywheel) for over a year now, no problems. And I know others who have done the same and been fine for years.

Not sure what the limit is on a d series. But on b series most people seem to suggest 13lbs. You can definitely do it lighter, like 11-12lbs, but many seem to not recommend it...thats why I decided not to push my luck.

 

wouldn't you be balancing it when you were shaving it? How does balancing differ from shaving?

 

not neccessarly, they shave the material off of the back of the flywheel. the flywheel could still be out of balance after being machined. think of balancing a tire, sometimes theres diff weight in diff places.

 

Makes sense.

 

I was wanting to do this until i saw a clip of a eclipse that had a lightend stock flywheel that came apart while he was making a run .came apart so fast it literally blew his tranny into peices.

 

but do you know anything about his situation? like how light it was? what kind of power he was running?....who knows what other factors may have been at play. I'm not saying you should completely trust that a lightened stock flywheel is 100% safe all the time.... but I've yet to see anyone running a conservately lightened stock honda flywheel have any problems.

take for example the stock itr flywheel... its 14lbs. And I don't think its construction is any different from other b series.------if anyone knows any different please post, because i've been wondering about this for awhile.

 

I've heard of people using full size brake lathes to shave their flywheels. Anyone else able to elaborate?

 

i am running a Fidanza Flywheel and i would HIGHLY recommend it, improves performance drastically. Just pitch the extra $$$ for one

 

just run an itr flywheel. 14lbs is better than stock.

 

d16a6 OEM flywheel, lightened. 5 years ago

 

Run an ITR flywheel on a d sreies?? I thought the 2 are totally different.

 

He meant run the itr on a b-series.
For $50 I would definitely try it.
Eclipses are a different story mainly because of the hp difference. The more hp you run the higher the risk of running a lightened flywheel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dan4g63 &raquo;</TD></TR><TR><TD CLASS="quote">He meant run the itr on a b-series.
For $50 I would definitely try it.
Eclipses are a different story mainly because of the hp difference. The more hp you run the higher the risk of running a lightened flywheel.
</TD></TR></TABLE>


sry didnt realize we were talkin bout the D still.