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Anyone running or know anyone that is running Primitive's machined LW flywheel. I'm debating whether on getting his flywheel or an exedy one.

I've seen conflicting literature that the exedy is 12.5 lbs and/or 14 lbs.

I'd prefer to stay around the 14lbs range.

I've got one josh, have been running it for a few years now. It weighed in at 14 lbs, makes regular driving a lot easier with the 2.2. now with the 2.5, it's got plenty of go-room.

I would jsut be wary of a lightened flywheel, as opposed to a light weight flywheel.

MK

I REALLY like my Exedy. The car drives insanely well. 14 pounds is the official weight on the exedy.

hmmm......I'm not really worried about the fact primitive's LW flywheel. The thing i have to look into now is material.

One is cast iron, and one is chromoly. Cast iron I believe disapates heat better, and I'm goin to try and check on the other properties as well.

Will that REALLY make that much of a difference in typical daily activity?

I don't know.....if the numbers are close, probably not.....about the only thing I could think of is possibly how quick clutch disk material builds up on the chromoly fw vs. the iron.

Josh, I think you are trying to get a little too deep into things with the parts you choose. I understand you want to make the best informed decision possible. But it's very hard to decompile ALL the engineering decisions that go into a product.

I wouldn't want a lightened flywheel just because of what has been done to the metal. With material removed there is all kinds of cuts through the cellular structure. I'm trying to remember what I learned in my metals class. It's always better to have something formed to the correct shape rather than cut it to get there, that's why forged stuff is the best.

Exedy is the best. It's what the engineers at Subaru Technica International decided to use, that's good enough for me. They have to choose the best stuff or their butts can get sued off. They also don't massive price cut because they do the "limited" models.

If you want to try Primitive, go for it. If they rally their flywheel and it holds up, good, no worries. Exedy has also been shown to hold up through extensive use, also. How does that saying go... don't try to reinvent the wheel? Ok, friendly advice post done.

I know....I know.....I'm hoping to have made a decision by the weekend.....I'll let ya know what I decide.

So long as this doesn't happen to your lightened flywheel :


http://mtk.darkwire.com/flywheel/

MK

sweet jesus!

Yep, those things have severed peoples legs off before. That's why some drag racing places require a special cage to contain anything that might grenade in your tranny. Can't think of the name, danggit.

mTk wrote:So long as this doesn't happen to your lightened flywheel :


http://mtk.darkwire.com/flywheel/

MK

what type of FW is this?

It is a lightened Honda flywheel. However before jumping to standard Honda conclusions, it was done professionally by a reputable Honda shop (If only i could find the original post).

Granted most honda engines rev far beyond what Subaru owners can dream of, it still shows what even the most minute error in lightening can do.

MK

Brat4by4 wrote:Yep, those things have severed peoples legs off before. That's why some drag racing places require a special cage to contain anything that might grenade in your tranny. Can't think of the name, danggit.

Blast Shields.

The Exedy flywheel is rated to 14,000 RPM or something.