Moderators BarManBean Posted December 2, 2013 Moderators Share Posted December 2, 2013 I'll measure the stock sti clutch that I have in the garage--can measure the FX350 when it comes out later this week. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
urfsin Posted December 2, 2013 Share Posted December 2, 2013 So I did a little research on clutch sizes in general and this is what I found... WRX / LGT: 230mm STI: 240mm 2004 Porsche 911: 240mm Corvette: 290mm So it seems that 230mm is on the smaller side, but not super small and 240mm is solid. 290mm on the Vette is SUPER beefy, but hey those are big old V8's producing very big power. That being said, a stage 2 LGT can produce a very large amount of TQ, let's say 350 - 375 ft lbs at the crank. That's a lot to ask of a 230mm clutch I think. Slide It Sideways Link to comment Share on other sites More sharing options...
need bb Posted December 3, 2013 Share Posted December 3, 2013 Wow this has me concerned. I was hoping to get 60K+ miles out of my FX300 as long as didn't beat on it. Even at stage 2 the stock one will still hold up for a long time. Link to comment Share on other sites More sharing options...
MarcLgtSTI Posted December 3, 2013 Share Posted December 3, 2013 I posted on another thread, but I currently have a 05 LGT and did a complete overhaul of the engine and upgraded to an 2012 sti turbo, intercooler, manifold, and port and polished the head. I also sleeved the block, installed forged pistons, and have a complete stage 2 invidia exhaust and SPT pipes / intake. I currently have a competition stage 3 clutch that is starting to slip at 9k miles!! Now I am looking to buy a new clutch and it seems im at a standstill. Either stick with a competition clutch (I am a little pissed that it didn't last) Or go with the FX300 with wrx flywheel / or LWFW. It starts to slip under heavy acceleration 4th 5th and sometimes 1st. Here are some videos. I really would like a clutch that will last more than a YEAR!!!! lol Pull http://s28.photobucket.com/user/pantsmasterflex/media/IMG_2507.mp4.html SLIP in 4th http://s28.photobucket.com/user/pantsmasterflex/media/IMG_2508.mp4.html?sort=3&o=0 Link to comment Share on other sites More sharing options...
caramall2 Posted December 20, 2013 Share Posted December 20, 2013 I'd go fX 350, not 300 IMHO. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
GEE-OTTO Posted December 20, 2013 Share Posted December 20, 2013 Nobody runs the higher tier Exedy options? They are a solid name and OEM just curious Link to comment Share on other sites More sharing options...
urfsin Posted December 21, 2013 Share Posted December 21, 2013 ^What options? can you point us to some? Slide It Sideways Link to comment Share on other sites More sharing options...
GEE-OTTO Posted December 22, 2013 Share Posted December 22, 2013 ^What options? can you point us to some? Exedy Stage1 or 2, Hyper Single, etc. Not saying dont use CM products, tons of great reviews on various sites. Link to comment Share on other sites More sharing options...
urfsin Posted December 23, 2013 Share Posted December 23, 2013 Yes, the Exedy stage 1 is pretty much the OEM set up. When you say "Stage 2" are you referring to this? http://www.rallysportdirect.com/Exedy-Stage-2-Cerametallic-Disc-Clutch-Kit-Subaru-Models-inc-2006-2011-WRX-2005-2009-Legacy-GT If so, I don't think many guys here are wanting to run a three puck clutch. As for the Hyper Single, I don't think anyone here has run that set up....I did find this on NASIOC however. Exedy Sucks Bad! - NASIOC I am not saying the FX300 is the best thing in the world here. I think the Exedy stage 1 is a good set up for a lot of guys running mild mods, but once you get into the 300 HP + / 320 + TQ at the wheels that clutch is living on borrowed time. This is where things get interesting. A lot of guys here have tried a fair amount of different set ups. So far, only a select few have gone over 50K miles with ANY aftermarket clutch. Personally I had a Spec "stage 2" clutch that lasted about 25K miles. I think it could have lasted longer if I had a new or resurfaced flywheel (I just sanded and wiped down my original flywheel). I now have the FX300 with about 5K miles and I like it very much, but the stories of guys here with only 20-30K miles on their FX300 worry me. I am hoping mine will last longer because I installed a brand new WRX flywheel at the same time. Slide It Sideways Link to comment Share on other sites More sharing options...
GEE-OTTO Posted December 27, 2013 Share Posted December 27, 2013 Nice info and I leave the 300+ AWHP to you guys I'm just a stock kinda guy, got my Exedy Stage 1 and case of Extra-S delivered today, heading up to AndrewTech in the morning for the install. Since they are so thin around the holidays Sam said h'ell have two tech work on it and knock it out in record time! Most folks dream of a white Xmas I dream of a OEM like pedal feel Link to comment Share on other sites More sharing options...
Scooby2.5 Posted December 27, 2013 Author Share Posted December 27, 2013 You will love it. I am running stock subaru 6 speed clutch and flywheel in my STI 6 speed swap and I am at 350/360 to the wheels on pump and 385/425 on E85. So far no problems at all..... Link to comment Share on other sites More sharing options...
GEE-OTTO Posted December 28, 2013 Share Posted December 28, 2013 1. That may have been the fastest clutch job I've ever seen 93 minutes start to finish. 2. OMFG my pedal feel is lighter than my 2.5i! 3. Extra-S quieted down the gearbox substantially. 4. Link to comment Share on other sites More sharing options...
need bb Posted December 31, 2013 Share Posted December 31, 2013 The short life of the FX300 has me concerned. I did some research and those with the Audi's were also having issues with premature wear. They said the FX350 should last longer, but no one has high miles on this clutch yet. To me it seems a segmented clutch wouldn't last as long due to less surface area compared with the full face clutch. While the segmented might be able to hold more power I would think it would wear faster due to less surface area to the flywheel. Thoughts? Link to comment Share on other sites More sharing options...
MaStaMooN Posted July 22, 2014 Share Posted July 22, 2014 Well after 2.5 years and 25k miles, my FX300 started slipping in 5th gear when trying to pass on the highway... Stock lasted 80k miles at the same power level. Utter trash. :| Jon - vBGarage Profile Link to comment Share on other sites More sharing options...
monsterface Posted August 11, 2014 Share Posted August 11, 2014 Hey guys, I'm making about a 310whp and 300ft.lbs on a dyno that a baseline sti will pull 220-225 whp on. Will a FX300 be enough to hold current power level? Meth and EL headers will be added eventually. Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted August 11, 2014 Moderators Share Posted August 11, 2014 Hey guys, I'm making about a 310whp and 300ft.lbs on a dyno that a baseline sti will pull 220-225 whp on. Will a FX300 be enough to hold current power level? Meth and EL headers will be added eventually. Yes, it will hold that power. That said, pick literally ANY other clutch brand outside of clutch masters and you'll be much happier. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
monsterface Posted August 11, 2014 Share Posted August 11, 2014 Do you recommend SPEC or ACT? Why the hate for FX300? Link to comment Share on other sites More sharing options...
Code Posted August 11, 2014 Share Posted August 11, 2014 Many people have had issues with premature wear and poor engagement characteristics. "Striving to better, oft we mar what's well." - Bill Shakespeare - car modder Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted August 12, 2014 Moderators Share Posted August 12, 2014 Do you recommend SPEC or ACT? Why the hate for FX300? ACT is tried and true with heavy pedal effort. Spec 2 / 2+ seems to be quite popular with the folks using them here. A lot of folks seem to have good luck with SouthBend as well. I had an FX350 and hated it. Shuddered like crazy no matter what. Several are having a similar experience with the FX300s. Beyond that, failure seems quite common within 10-20k miles. Unacceptable in my opinion. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
Brian3676 Posted August 12, 2014 Share Posted August 12, 2014 SouthBend is awesome. Been using them for 10 years now in different cars Link to comment Share on other sites More sharing options...
dub strong Posted August 30, 2014 Share Posted August 30, 2014 Stay away from clutchmasters. My stock clutch held stage 2+ power levels - up to approx 285 hp 360 ft lbs at the wheels - for 77,000 miles of distinguished service. At the recommendation of a vendor on this forum, I "upgraded" to the clutchmasters fx300 (full face, sprung, kevlar) with a single mass wrx flywheel. From day one, it was not a great set up for a daily driver. It was very grabby and chattered like hell. I had to relearn how to drive the car. The only positive was the pedal pressure felt like stock. I figured I could live with it as long as it held the power reliably, right? But the damn thing only lasted 25,000 miles before it started slipping. And their customer service won't blow you away either. Ask me how I know. I recently switched to the Exedy Stage 1 clutch kit since exedy is an OEM supplier of Subaru clutches. I've only driven approx 2,000 miles so far, but the pedal feel and engagement is just like stock. So far it is holding stage 2+ power just fine. Link to comment Share on other sites More sharing options...
Jeffspec.b Posted September 3, 2014 Share Posted September 3, 2014 I own a 07 spec.b, I have heard mixed reviews on what clutch I should do for the 6MT. Some say the FX300 others say go with the Exedy Stage 1 or 2. I currently am running just over 300 ft lbs of torque with 70k. The stock clutch is slipping and want to do a new one before winter. What would be the best recommendation for my situation? Im not new to the forums but I just havent gotten into them, bare with me (: Any help at all would be delightful feel free to PM me if you have any input, Thanks Link to comment Share on other sites More sharing options...
Xplosivo1 Posted September 4, 2014 Share Posted September 4, 2014 Just read the reviews...should be pretty clear clutch masters IS NOT the way to go. Look at Exedy or southbend; southbend are modified exedy clutches. ACT are good too, but again if it were me I'd steer very clear of CM. Link to comment Share on other sites More sharing options...
MarcLgtSTI Posted September 4, 2014 Share Posted September 4, 2014 I currently have a CM FX350 on my stage 2 2012sti motor with a smfw and tks tob. With about 15k miles the clutch is holding up well and the pedal is very light. Just very finicky!! Great cold but once it warms up it becomes very grabby almost on / off depending on how much I was driving that day. I got used to it but the break in period was a little annoying. I've read that the fx300 is worse and I will either recommend it once I get past 25k or not. It seems that CM clutches take a shit around 25k which is terrible. Link to comment Share on other sites More sharing options...
Turkeylord Posted September 11, 2015 Share Posted September 11, 2015 Bumping this one to report that after ~2700 miles my CM300 is butter smooth. Link to comment Share on other sites More sharing options...
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