Sr20det 400-500hp clutch setup

[S14rebuild]

Hey, askn what would be a reliable clutch setup for a sr20 pushn 400-500hp? Just seeing what zilvians are running/recommending...thanks



Shit just realzied this belongs in tech...my bad. Mods please move. Thank you

[TheRealSy90]

OsGiken has a couple Twins and Triples that would work perfectly.

[SupaDoopa]

ORC/OS Giken/EXEDY/ACT.

[S14rebuild]

There any benefit to like 1 disc clutch vs 2 or 3 disc clutch. Obvs horse power rating but if there rated the same 1vs 2/3 disc?

[samotage]

I?ve just received a Mantic stage 3 cushioned ceramic single plater, good for 900 or so Nm of torque. Note the torque rating is the critical one.


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[samotage]

Multi plate, more expensive and complex, noise, and may get a better pedal feel.

Single plate, cheaper, simpler, less noise but may have a heavier pedal.

Also look into a proper braided clutch line, and remove all that Oem spaghetti!


Sent from my iPad using Tapatalk

[S14rebuild]

Multi plate, more expensive and complex, noise, and may get a better pedal feel.

Single plate, cheaper, simpler, less noise but may have a heavier pedal.

Also look into a proper braided clutch line, and remove all that Oem spaghetti!


Sent from my iPad using Tapatalk


Im already braided line, and dont mind a stiff pedal. Im for as simple as possiable, less moving parts, just want something thats gonna hold and not slip

[b.series]

I have an ACT forsale that can hold your power brand new in box 400 plus shipping.

[silviaks2nr]

What trans? A stock sr/ka trans is not going to like that power level for very long. You might want to look into a 350z/370z/300zx trans.

[S14rebuild]

What trans? A stock sr/ka trans is not going to like that power level for very long. You might want to look into a 350z/370z/300zx trans.

Im asking about a clutch not which transmission ill need.

Thanks for the input

[TheRealSy90]

There any benefit to like 1 disc clutch vs 2 or 3 disc clutch. Obvs horse power rating but if there rated the same 1vs 2/3 disc?

Typically clutches are rated by torque capacity.

IMO comparing a same-rated single disc to a twin disc, the twin disc will be easier to drive with more pedal modulation available. Less pedal effort, and also there will be less shock/stress to the drivetrain during fast shifting or clutch kicks etc.

[RalliartRsX]

There seems to be a few single plates that will do. Spec stage 3 or stage 3+ is one that will do 500+ ft lbs (which is how clutches should be measured).

Any twin plate will meet your needs.

A few items considering I have had a multitude of clutches over the years (from a ATS twin carbon carbon, to a FX500, to a stage 3 Spec, etc etc)

Disregard what people say about pedal feel for the singple plate. Unless a super heavy PP (FX500 or HD ACT for example), the single plates leg pressure are only slightly above that of a twin

However, the twin engagement is much smoother than over any single present that can handle over 400 ft lbs at the the wheels. Also, depending on twin plate, some are just inherently noise. Part of my problem is the JK41 is a noisy bitch, and account for a majority of the gear stack clatter from from the gearbox area. I would have kept my ATS twin if I had realized just how loud the CDxxx/JKxx gearstack was so loud.

My recommendation; grab a Sped stage 3 and go to town. If not, grab any flavor of twin. However, keep in mind, the metalic/or sintered based twins can also be fairly grabby,

[PoorMans180SX]

and also there will be less shock/stress to the drivetrain during fast shifting or clutch kicks etc.

Just to add to this, there are two factors when it comes to drivetrain shock that pertain to your clutch. How hard it grabs and it's weight. The heavier the clutch, the harder it is on the synchros. That means sometimes twins are a little harder on the synchros and won't shift as fast. OSGiken twins tend to be very light though.

A super aggressive material and pressure plate will grab harder and be harsher on the drivetrain, so it makes sense to go to a twin at some point for a little slip (manual modulation) and cushion.

Whatever you do, don't buy an unsprung clutch if you're concerned with drivetrain longevity.

[S14rebuild]

Gotcha, thank you for the input, looks like i got some searchn todo..just dont wanna regret with the direction i go.

Any more info would be appreciated. seems like a well info thread for future search results

[jr_ss]

Exedy Twin disk here. 371ft/lbs of trq(Kingtalon says it’s not possible) out of my 2liter. Plenty of drag passes. They do not like to slip but it’s rated at 500ft/lbs.

[S14rebuild]

Was lookn at an exedy hyper super single..... but not sure if it will hold enough for my goals

[PoorMans180SX]

I’ve honestly just been on a similar search. The car I bought came with a competition clutch “white bunny” which is only good for 300tq tops. I plan on making more than that.
The cool part is that since it’s 240mm disk flywheel, you can use a Z32 300zx clutch, which the ACT full-face disk is good for 400tq. The six-puck is good for 525.
So that’s another option other than going twin disc.

[RalliartRsX]

I dare a hypersingle take 415 ft lbs at the wheels on a VET BRZ. That's a single data point however...

[S14rebuild]

Hmmmm.... just tryn to get the best bang for the buc. Not sayn im cheap, just wanna goin the right direction, for a good price.

That exedy hyper single is lookn right...unless someone says hell no lol

[TheRealSy90]

So why are ya'll so scared of a twin disc? They're great.

[PoorMans180SX]

So why are ya'll so scared of a twin disc? They're great.

Ideally I'd get an OSGiken STR, but my budget says nah on the $1700.

[S14rebuild]

So why are ya'll so scared of a twin disc? They're great.


Im not scared, just the price.... $ is everything

Can get that hyper single stage 2 for a hella good deal. But again...if it wont suit my need i wont buy it

[jr_ss]

Use a safety factory of 1.25-1.5. If you intend to make 350trq, plan for a clutch that can hold 440ftlbs.

[TheRealSy90]

Look there's a point where you need to pay up for the quality parts that are going to perform at the level you need for the car you are trying to build.

Like jr_ss said, you need a clutch that is rated higher than your power level. Running say 300tq on a 300tq rated clutch is just asking to burn it up earlier than it's service life.

If you want cheap clutches, stay at a cheap to maintain power level.

[S14rebuild]

Look there's a point where you need to pay up for the quality parts that are going to perform at the level you need for the car you are trying to build.

Like jr_ss said, you need a clutch that is rated higher than your power level. Running say 300tq on a 300tq rated clutch is just asking to burn it up earlier than it's service life.

If you want cheap clutches, stay at a cheap to maintain power level.


Got it $1500 here i come

[jr_ss]

Got it $1500 here i come

Unfortunately, that is the reality. I got lucky and nabbed mine for $1k. It was a $1600 clutch at the time.

If you?re anything like me, you?ll continually push the power limits. I ALWAYS want more. So I bought a clutch knowing I was going to ?grow? into it. Another factor to consider, most twin disks are rebuildable. Single disks, not so much, however there are a few you can rebuilt.

Anyway, some food for thought.

[TheRealSy90]

Huge benefit to a quality twin is you can get rebuild parts fairly cheap and extend the life of that clutch 2-3x over.

[S14rebuild]

Yea, i have a power goal set and honestly have no need to pass that..just will cost more $ and not intrested in that. Ive spent enough.

But yea looks like good chunk of $ will be spent on this clutch

[e30gangsta]

Fml I didn't pay too much attention when ordering my clutch. And I'm shooting for 400 on my 6 puck white bunny setup. There's no way the 6 puck only holds 330ft lbs. Every site besides enjuku says they hold up to 500hp. No tq rating though.

[PoorMans180SX]

Fml I didn't pay too much attention when ordering my clutch. And I'm shooting for 400 on my 6 puck white bunny setup. There's no way the 6 puck only holds 330ft lbs. Every site besides enjuku says they hold up to 500hp. No tq rating though.

That's the great struggle in clutches. back in the day with slow spooling turbos and limited engine management, a 500hp car probably only made 330ft/lb of torque. But today they make 400+wtq haha. Whoever decided to rate clutches in horsepower was kinda dumb.

Slipping at 415tq:
https://zilvia.net/f/showthread.php?t=630904

Now I'm reading the disk is 250mm... which is twin-turbo Z32 size. I'm going to measure mine when I get home to confirm. I'll post pics.

[PoorMans180SX]

Huge benefit to a quality twin is you can get rebuild parts fairly cheap and extend the life of that clutch 2-3x over.

I'm totally in the "do it once, do it right" camp, but I can also buy three ACT six-pucks for less than the price of the OSgiken twin. ACT is still a high-quality clutch that will perform it's function well. Also a little heavier flywheel isn't a bad thing on a street car.

It may be that a twin-disk will last longer, but I haven't seen any empirical data on that kind of thing. Which would be very interesting to see. Until then, I'll get an ACT and get my ass to the track and spend the $1000 on gas and tires.

[e30gangsta]

That's the great struggle in clutches. back in the day with slow spooling turbos and limited engine management, a 500hp car probably only made 330ft/lb of torque. But today they make 400+wtq haha. Whoever decided to rate clutches in horsepower was kinda dumb.

Slipping at 415tq:
https://zilvia.net/f/showthread.php?t=630904

Now I'm reading the disk is 250mm... which is twin-turbo Z32 size. I'm going to measure mine when I get home to confirm. I'll post pics.

Please do because I am curious if I can just upgrade the disc, and retain the pp and flywheel to keep cost down.

Also he states he is running the ceramic full face clutch disc, I assume that means he's not running the 6 puck. Which I would hope would hold more tq than that. I guess there's only one way to find out.

[TheRealSy90]

I'm totally in the "do it once, do it right" camp, but I can also buy three ACT six-pucks for less than the price of the OSgiken twin. ACT is still a high-quality clutch that will perform it's function well. Also a little heavier flywheel isn't a bad thing on a street car.

It may be that a twin-disk will last longer, but I haven't seen any empirical data on that kind of thing. Which would be very interesting to see. Until then, I'll get an ACT and get my ass to the track and spend the $1000 on gas and tires.

There's just no way to get that sort of data every car will be driven differently.

[S14rebuild]

Fyi...i went with the exedy hyper single stage 2. Seems like 400hp is my goal, and im just fine with that.

[RalliartRsX]

Im not scared, just the price.... $ is everything

Can get that hyper single stage 2 for a hella good deal. But again...if it wont suit my need i wont buy it

What is a Hyper Single stage 2?? I though Hypersingle only came in one flavor??

Got a link to the clutch you bought??

[PoorMans180SX]

It is indeed a 250mm disc.

https://i.imgur.com/RE7dxmmh.jpg

Unfortunately ACT has basically discontinued their Z32 TT line. I did find that McLeod makes these Street Supreme clutches that look nice. Designed to hold 70-100% more than stock, which is kind of ambiguous. I think I'll give them a call to see if they'll give me torque figures.

https://www.mcleodracing.com/index.php/street-supreme-clutch-kit-51609.html

https://www.mcleodracing.com/media/catalog/product/cache/1/image/0dc2d03fe217f8c83829496872af24a0/7/6/763761-bi-1.287.jpg

Spec also makes their Stage 2+ that holds 515ft/lbs and Stage 3 which holds 555ft/lbs.

Please do because I am curious if I can just upgrade the disc, and retain the pp and flywheel to keep cost down.

Also he states he is running the ceramic full face clutch disc, I assume that means he's not running the 6 puck. Which I would hope would hold more tq than that. I guess there's only one way to find out.


IDK, the pressure plate is really important to how much torque the clutch holds. If competition just uses a factory pressure plate (my theory), then it's probably irrelevant what disk you put in it.

[S14rebuild]

What is a Hyper Single stage 2?? I though Hypersingle only came in one flavor??

Got a link to the clutch you bought??

Idk what was copied froma link....but below is what ima run

Should be just fine


https://www.lmperformance.com/858547/nh01sd1-exedy-hyper-single-clutch-kit-nissan-240sx-all-all-w-sr20det-swap-sprung-disk-push-type.html

[RalliartRsX]

Ah got it! Yep, that's just a Hyper Single. The Stage 2 is a 3 puck on/off switch affair which doesn't hold quite as much torque as the Hypersingle. Just wanted to make sure you got the right clutch :)

Good pick!
Remind me later and I will pull up the dyno graph from the BRZ/VET setup which made 400+ ft lbs at the wheels on a GTX30(something another) on a Hyper Single. That is up there in terms of the rated torque rating of the clutch (I think manufacturers use a n+x buffer/safety factor when they rate clutches)

[RalliartRsX]

So a TT Z32 clutch will NOT work on a SR unless you have a custom flywheel. However, the NA Z32 (VG30DE) is a direct bolt on. I went through all this when I swapped a VET into my Z32.

However, JWT DOES make a 250mm SR clutch which I think utilizes Z33 PP and disk.

[S14rebuild]

Ah got it! Yep, that's just a Hyper Single. The Stage 2 is a 3 puck on/off switch affair which doesn't hold quite as much torque as the Hypersingle. Just wanted to make sure you got the right clutch :)

Good pick!
Remind me later and I will pull up the dyno graph from the BRZ/VET setup which made 400+ ft lbs at the wheels on a GTX30(something another) on a Hyper Single. That is up there in terms of the rated torque rating of the clutch (I think manufacturers use a n+x buffer/safety factor when they rate clutches)

Yea say 375ft/lb rating but im sure thats lower then what it would really do.

[S14rebuild]

So a TT Z32 clutch will NOT work on a SR unless you have a custom flywheel. However, the NA Z32 (VG30DE) is a direct bolt on. I went through all this when I swapped a VET into my Z32.

However, JWT DOES make a 250mm SR clutch which I think utilizes Z33 PP and disk.


Ran a z32 na clutch on a rb20 trans setup and i know that trans is same as sr/ka

[TheRealSy90]

So what do you guys think the benefit is with a 250mm clutch OD verses options around 204mm and 215mm?

[RalliartRsX]

Holding power and feel. A 250mm clutch will have a much smoother disengagement/engagement than a smaller clutch. Also, the smaller disk are unable to handle the heat as well. Also, larger friction surface equates to more holding capacity.

Only downside is weight. However, I went from a twin carbon carbon weighing 26 lbs for the entire twin disk assembly to a single plate which weighs 36 bs and I couldn't tell you the difference in how either revs out.....

So yeah. Single plate, due to the heavier flywheel also dampens some of the JK41 gear stack noise.

[jr_ss]

Keep in mind that most twins are 200mm in diameter, the extra capacity comes from additional friction plates and increased surface area. Not because it is larger diameter.

Think of a clutch in terms of leverage. 250mm gives you added leverage over the smaller diameters. Brakes can be compared in the same way. I larger diameter gives you more leverage and also more heat sink capacity.

[TheRealSy90]

OsGiken clutches come in 3 different outer diameters, usually indicated by the 4th digit of the clutch type. A = 184mm / B = 204mm / C = 215mm

TS2AS, TS2BD, TR2CD for example.

[PoorMans180SX]

So a TT Z32 clutch will NOT work on a SR unless you have a custom flywheel. However, the NA Z32 (VG30DE) is a direct bolt on. I went through all this when I swapped a VET into my Z32.

However, JWT DOES make a 250mm SR clutch which I think utilizes Z33 PP and disk.

OOOHHHHH, this makes a lot of sense. I think Competition might be doing the same thing with their "white bunny", hence the 250mm disc. I was wondering what was going on here. Gotta see if I can find some dimensions or something before I go ordering a clutch.

Called McLeod and talked to them about their torque ratings. They didn't seem to want to give me a number but they said that the 350Z six-puck would be perfect for a 400wtq drift car. Probably gonna pull the trigger on that today.

[e1_griego]

I called JWT a while back and they say they don't make their SR flywheel meant for 250mm clutches any more.

I think the clutch they offer is only for use with their flywheel, at least that was my understanding.


I ended up with an OSG twin plate instead.

[PoorMans180SX]

Confirmed by googling part numbers on the pressure plate that it is indeed a 350Z clutch on the comp clutch.

[e30gangsta]

Confirmed by googling part numbers on the pressure plate that it is indeed a 350Z clutch on the comp clutch.

996881620 competition clutch is the stage 4 clutch kit pn from comp clutch.

I put the above part number into google. Came up with 350z/g35.

Now my question.

I currently have a red bunny clutch kit in my car with the 6 puck upgraded clutch in my car. Do you guys think they ship them with that 996881620 disc?

Or do you think they ship them with a lower rated 6 puck clutch?


I only ask because if they do, then I dont need to upgrade. But if they don't can I just throw the 996881620 clutch in there, or do I have to purchase the upgraded stage 4 pressure plate too?

[NukeKS14]

996881620 competition clutch is the stage 4 clutch kit pn from comp clutch.

I put the above part number into google. Came up with 350z/g35.

Now my question.

I currently have a red bunny clutch kit in my car with the 6 puck upgraded clutch in my car. Do you guys think they ship them with that 996881620 disc?

Or do you think they ship them with a lower rated 6 puck clutch?


I only ask because if they do, then I dont need to upgrade. But if they don't can I just throw the 996881620 clutch in there, or do I have to purchase the upgraded stage 4 pressure plate too?


Why guess? Why not just contact them and ask? They should be more than capable of providing the info you need to get the correct part.

https://www.facebook.com/CompetitionClutch/

1108 Ellington Drive NW
Conyers, Georgia 30012

(678) 806-3422

[e30gangsta]

Edit I got a response from them after a couple of days.

Thank you for reaching out to us for more insight on the Red Bunny 6 Puck "all in one" VS the Stage 4 Performance Clutch kit. I'd be more than happy to help distinguish more between the two.

The Red Bunny 6 Puck (PN: 60443-G4) was indeed created for those needing an all in one setup for mild-mid performance use and not break the bank while allowing a complete refresh.
This particular kit can only utilize the components it was created with, therefore, not allowing the switch to a Stage 4 clutch kit disc, I apologize.
The main reason being, the diameters are a tad off, the Red Bunny Kit being slightly larger than the Stage 4 kit.
Along with that, the discs are made slightly different allowing the Stage 4 Clutch kit to handle more kicking or abuse.

The reason that is, leads to more of the build of the Red Bunny kit.
This kit, albeit being made to handle more performance, still utilizes an OE Pressure Plate style. This will be the biggest factor, for these particular kits, in holding a higher WTQ threshold.
The Stage 4 Clutch Kit having a higher clamp force pressure plate with a 6 puck disc allowing significant more spirited use.

All in all, the Red Bunny is rated for 330 Wheel Torque, with the Stage 4 kit (PN: 60442-1620) being rated for 550 WTQ.
The Stage 4 kit would not be able to bolt up to the Red bunny FW (I feel as though you may know this, but just in case.) However, it can bolt up to your OE Flywheel or matches the aftermarket Flywheels for your vehicle, below:
Ultra LW FW for 5 speed only, 10.28LBS PN: 2-760T-STU
Lightweight FW for 6 speed only, 15.70LBS PN: 2-635-ST
​
​​​​​If you have any questions about the above or more, just let me know. I'll do my best to explain.
Thank you!

--------------------------------------------

So basically I'm screwed. Anyone need a white bunny clutch setup. Literally zero miles on it the car is still on jackstands -_-

[PoorMans180SX]

Confirmed that the McLeod 350Z clutch fits the Competition flywheel.

https://i.imgur.com/eptqQMEh.jpg

https://i.imgur.com/78rWIoFh.jpg

[RalliartRsX]

You mean the CC white/red bunny 240/250mm flywheel??
Cool!

[PoorMans180SX]

You mean the CC white/red bunny 240/250mm flywheel??
Cool!

Correct! So pretty much any 350Z clutch should work.

[RalliartRsX]

Do they have an independent partnumber for the flywheel??

[e30gangsta]

Correct! So pretty much any 350Z clutch should work.

You are the fucking man! Great so now I know to upgrade to any 350z clutch setup and I should be good to go. Please let us know if the install goes smooth. Also did you get the street supreme?