Primitive's LW Flywheel

Flywheel, Clutch, Transmission, Axles, etc...

Moderators: Helpinators, Moderators

Post Reply
Legacy777
Site Admin
Site Admin
Posts: 27930
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Primitive's LW Flywheel

Post by Legacy777 »

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.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
JasonGrahn
Knowledgeable
Knowledgeable
Posts: 1333
Joined: Tue Oct 15, 2002 4:55 pm
Location: Seattle, WA
Contact:

Post by JasonGrahn »

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.
-Jason Grahn
mTk
no title
Posts: 1316
Joined: Sat May 03, 2003 6:29 pm
Location: spfld, il

Post by mTk »

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

MK
1992 BC672 AWD 5MT
BAC5.2
Moderator
Moderator
Posts: 9026
Joined: Thu Jan 29, 2004 8:47 pm
Location: Maryland www.andrewtechautomotive.com
Contact:

Post by BAC5.2 »

I REALLY like my Exedy. The car drives insanely well. 14 pounds is the official weight on the exedy.
2009 Outback 2.5XT. 5MT. Satin White Pearl.
2009 Impreza 2.5i Premium. Blue.

[quote="scottzg"]...I'm not a fan of the vagina...[/quote][quote="evolutionmovement"]This will all go much easier if people stop doubting me.[/quote]
Legacy777
Site Admin
Site Admin
Posts: 27930
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Post by Legacy777 »

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.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
JasonGrahn
Knowledgeable
Knowledgeable
Posts: 1333
Joined: Tue Oct 15, 2002 4:55 pm
Location: Seattle, WA
Contact:

Post by JasonGrahn »

Will that REALLY make that much of a difference in typical daily activity?
-Jason Grahn
Legacy777
Site Admin
Site Admin
Posts: 27930
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Post by Legacy777 »

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

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
Brat4by4
Stratified
Posts: 1608
Joined: Thu Jan 30, 2003 6:52 am
Location: NE Ohio

Post by Brat4by4 »

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. :)
1993 WMP BC6 5MT EJ22T 9psi 3.9:1 213k 205/55R16

62.6 m/s @ 0.66 bar. Gotta love boost. :)
Legacy777
Site Admin
Site Admin
Posts: 27930
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Post by Legacy777 »

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

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
mTk
no title
Posts: 1316
Joined: Sat May 03, 2003 6:29 pm
Location: spfld, il

Post by mTk »

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

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

MK
1992 BC672 AWD 5MT
THAWA
Knowledgeable
Knowledgeable
Posts: 6829
Joined: Thu Aug 21, 2003 7:44 pm
Location: Sacramento, CA
Contact:

Post by THAWA »

sweet jesus!
Rio Red 90 Legacy LS AWD 174k
Liquid Silver 92 SVX LS-L 88k
[url=http://folding.amdmbpond.com/FoldingForOurFuture.html]Do you fold?[/url]

I'm on First and First. How can the same street intersect with itself? I must be at the nexus of the universe.
Brat4by4
Stratified
Posts: 1608
Joined: Thu Jan 30, 2003 6:52 am
Location: NE Ohio

Post by Brat4by4 »

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.
1993 WMP BC6 5MT EJ22T 9psi 3.9:1 213k 205/55R16

62.6 m/s @ 0.66 bar. Gotta love boost. :)
Legacy777
Site Admin
Site Admin
Posts: 27930
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Post by Legacy777 »

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

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

MK
what type of FW is this?
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
mTk
no title
Posts: 1316
Joined: Sat May 03, 2003 6:29 pm
Location: spfld, il

Post by mTk »

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
1992 BC672 AWD 5MT
BAC5.2
Moderator
Moderator
Posts: 9026
Joined: Thu Jan 29, 2004 8:47 pm
Location: Maryland www.andrewtechautomotive.com
Contact:

Post by BAC5.2 »

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.
2009 Outback 2.5XT. 5MT. Satin White Pearl.
2009 Impreza 2.5i Premium. Blue.

[quote="scottzg"]...I'm not a fan of the vagina...[/quote][quote="evolutionmovement"]This will all go much easier if people stop doubting me.[/quote]
Post Reply