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949 ORGANIC twindisc

4K views 12 replies 8 participants last post by  Broketuner 
#1 ·
Ok so I bought this clutch back at the swap meet and had it installed along with a 6 speed trans and ES diff mounts.​


first a few basic points:
-this is just a review I am not telling you to go get it, make your own decision and deal with the consequenses and benefits yourself (posting that because some clown ruined their headlights after trying to follow my "how to HID retrofit" thread and pretty much blamed me and even had the audacity to ask if I could help them in buying a new pair of headlights LOL)​

-this thing is SUPER lightweight and emilio isn't BSing when he claims "the car will free rev like a bike" it truely does.​

-the pedal is STIFF as can be expected in almost any higher end race oriented clutch.​

-Due to those 2 factors and the fact it needs to be slipped from a dead stop, I WOULD NOT RECCOMEND THIS TO ANYONE WHO FREQUENTS HEAVY TRAFFIC, the reasoning for that should be quite obvious :domo:​

-I went from a 5speed and stock clutch through the 3.9 torsen to the twindisc and 6speed so my results may be a little more aggressive than if you were to stay with the transmission you're used to​

-my review is from the perspective of a daily driver first and occasional track time second unlike most others who have bought this clutch setup being the reverse. My review is also pertaining only to the organic twin, the organic single or metallic single/twin may be signifigantly different.


DAILY use:
Combined with the 6 speed, 1st gear is almost useless. I can barely make it across an intersection before I need to shift into second if I'm wanting to go fast and don't go easy on the accelerator pedal preassure. this does make for some pretty fun canyon and freeway on-ramp entrances :mrgreen:​

The disc must be slipped from dead stops in order to prevent attention getting stalls or tire spins. It really isn't all that hard to do but did take me some practice. by the end of the second night I had it pretty much mastered.​

With the 6 speed it seems as though mileage has gone done quite a bit but I'll accept that for the added acceleration and the car being in higher RPMs at the same speed compared to the 5 speed.​

The car does make signifigantly more noise and some vibration @ idle(seems to go away when the car is moving) but I'm not sure how much of that can be attributed to the clutch as I also added ES polyurethane differential bushings.​

TRACK use:
For a track only or predominantly track car this is one of the best setups I've ever encountered in any car. It's got a quick precise action to the shifting that was lacking from the stock clutch and 5 speed setup. I was able to keep pretty close with a JRSCd NB in several sections(had tein flex suspension and was running RS2...the motor was stock except for SC) and absolutely blew the doors off of a near stock 1.8L NA with a torsen on the same tires as me(falken ziex 912) at Buttonwillow's Westloop #27​

the car is very easy to revmatch & heel/toe​

I'm still learning how to drive a RWD car for track/canyon use so that's really about all I can say.​

I usually due a traditional 1-10 scale on various categories so here's that portion:​

Weight savings & inertial gains over stock : 10 (was probably around 20lbs over stock and has a tighter moment of inertia....this is one of the few 10's I've given on ANY review I've ever done)​

Ease of installation(compared to a normal clutch): 8 (not too much different but adjusting the pedal to find the new sweet spot without too much action(which would damage the clutch) was pretty tedious work​

streetability: with light->moderate traffic: 7 (can easily be done once you're used to it, but it's a bit more of a chore than with a normal sized single disc setup weighing several pounds more.......in moderate->heavy traffic I'd say the 7 goesdown to a 3....can be done but your leg will be sore after less than an hour and it puts a signifigant amount of additional wear on things​

ease of revmatching & heel toe: 8 (it's easy again once you really get the hang of it but the car likes to rev so much I found that I was often over shooting the target RPM range)​

Customer service/support: 10 (not only did emilio print up several sets of directions before I left he also emailed them to me and he shipped me the clutch discs for free since they weren't in stock when I was there at the swapmeet)​




anything more feel free to ask or add :)
 
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#2 ·
You also have to mention that if you don't slip "quickly," you're going to have to rebuild that clutch unit sooner than you think.

It's based off race-car engineering. When is the last time you've seen a Le Mans GT race car leave the pits gently? They usually light the tires on the way out.

Having driven a car with a metal plate clutch (ORC), I would say the streetability is almost zilch. Very harsh engagement and a lot of noise. Your friction zone is tiny and the behavior is more like an on and off switch.

Broketuner has an organic disk setup which is a good compromise for streetability because it gives more slip and has a less harsher engagement. But by no means is it a wussy clutch :)

Twin disk.....lots of torque capacity.
 
#3 ·
very true valid points.

however since it has yet to be determined how long the setup can last in a daily before needing a rebuild, I did not mention it because there so far hasn't been anyone besides myself to use it in a predominantly DD car. I figure it SHOULD be common knoweledge that slipping a clutch leads to more wear but at this point it's still open ended.

and yes the metallic plate versions = MUCH smaller window of operation and virtually NO slipping ability....should be reserved for true track only cars.

have yet to drive on a single metallic in a miata but in a k20 civic just starting it up and driving around the pits was a PITA but once on the track it was amazing but the shifting window was litterally like a lightswitch.
 
#4 ·
I think I read on m.net Emillio said that the organic 2 disc is good for F/I street cars, but I'm glad to read an impartial review. The clutch looks sexy as hell, and I thought it would be wicked with a blower or ITBs but considering I have to drive this in traffic, I'm a little weary.
 
#5 ·
yea on 949's website Emillo was saying that it drives almost like stock with the organic, glad to hear this though. I am probably still going to buy it, cause I want my car to rev like a bike lol, but it will be good to go into it knowing that its gonna be heavy. Then again I have driven a 2g Eclipse with a 6 puck unsprung with some stupid heavy pressure plate. I'm sure this has got to be easier.

Also you need to post a video with your car revving, I have been trying to find one just to see what its like.
 
#6 ·
Once in motion it drives BETTER than a nomal clutch, but from a dead stop the engagement window is narrower & pedal preassure is much firmer compared to a totally OEM clutch/flywheel

also you get used to the aditional pedal preasure easily. I was used to it after the 2nd week

will try an take video sometime this week...it's super fun to rev at a sport bike that jokes like they wanna race & just get a dumbfounded look in return LOL

this is as close to a streetable multi-disc/smaller diameter unit as it gets
 
#8 ·
Thank you so much for the review Sean!
In the past I was driving a 5,5" tilton metal (multiple) plate clutch and it was pretty bad until I got used to it. Superheavy and totally on/off.
On my car I currently have my /4 year old ACT extreme which back then seemed difficult to operate but it's like butter in comparisson to the Tilton. Still when Tom Berry drove my car he told me that the clutch was very heavy. I'm just curious how much worse is the 949 unit in comparison to my ACT. I have no complains from my ACT but it's a very heavy unit (does anyone really know total weight - with stock flywheel?) so I would like to replace it with a lighter unit to spool the turbo faster.

I'm thinking of getting the 949 twin organic or the O.S.Giken (which is a bit more heavy but seems a bit better engineered).
 
#13 ·
Ok so time for a 1 & 1/2 year update.... still works perfectly & I've probably put close to 10K street miles.

I've done 1 additional track event & a few auto-x's this things is still amazing.

One thing is the cheap synthetic valvoline brake fluid burns up & turns dark black with this clutch & heavy use....switched to the super blue (also swapped it for the brakelines @ the same time) & it's all fixed no issues at all.

by comparison I had a stock 1.6L clutch on my first NB & less than 6 months later it was slipping like a bitch on crack in ice skates driving roughly the same amount & definatly the same type
 
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