Softest pedal for 600hp

[Stu Hagen]

I am "de-tracking" my supra and switching over for street use mainly. I have the RPS CC With chromally plate. While it works, the engagement is very snappy and really doesnt get better when warm. The pedal pressure is ohh maybe 40-50% greater than stock.

So can anyone share there opinions on the lightest pedal pressure that still can handle around 600wtq. I have heard that the SB is one of the best, but reading some resent nightmares about it not fitting or working leaves me open for another suggestion.
I may consider installing a new OEM flywheel as well, if this helps.


Stu

[suprajens]

I run the spec stage4 with oem flywheel. holds for my 900whp and have the same pedal pressure to stock.

[JUPRA]

I run the spec stage4 with oem flywheel. holds for my 900whp and have the same pedal pressure to stock.

That is interesting to hear.. I stayed away from the SPEC clutch for my supra because it was a bitch to drive in a past cobra.. Sure hope the carbonetics triple isn't to much of a pain in the ass to drive seeing as how I have one on its way.

[OcLpRk8699]

That is interesting to hear.. I stayed away from the SPEC clutch for my supra because it was a bitch to drive in a past cobra.. Sure hope the carbonetics triple isn't to much of a pain in the ass to drive seeing as how I have one on its way.

As a matter of relativity goes... isnt the cobra cable clutch? My 02 Mustang GT had a OEM clutch and it felt like doing a 800lb leg press at the gym. It may just be the physics of there pedal assy and cable clutch is just annoying in general.

[Nick 95 6sp]

I miss the light pedal effort of my good old HKS triple....though I hesitate to even mention it due to most people hating the clutch. I would say it was about half of the stock clutch pedal effort. Now I'm using the OS Giken triple which is probably easier to modulate but noticeably heavier pedal than the HKS.

[botchilah]

I have the RPS CC clutch too but I got the car with it and never had a chance to compare it with a stock clutch. I thought it was quite light in terms of pedal effort but definitely not too easy to modulate and pull away smoothly.

[93JDM2JZ]

I have a OS Gikken twin plate and i love it. Not to much chatter but bites when you need it.

[HellBringer]

I have the Spec twin disk model ST66SST. Pedal presssure is slightly lighter than stock and the engagement is very easy once broken in. Mine is currently holding 720WHP with no issues; however, it does not like drag racing. If you're planning on just doing highway pulls, roadracing, etc... then the Spec would be a great option, IMO. It does everything great but hold up to launches and costs about the same as any single disk when you factor in the cost of a new OEM flywheel, etc...

[AtomKane]

Stu chime in with Reid. He and I were having a clutch discussion and he likes this

Anyone gone for the Clutchmasters Stage 4 6-puck yet? I will be giving one a try here at the shop on a 6765 Billet/QSV car shortly. It is designed on an OEM style disc which is full-face but is technically still a 6-puck with the same material used on their Stage 4 clutches. I have used quite a few Clutchmasters clutches recently and have been extremely impressed with the engagement and how smooth they are. Clutchmasters has put a lot of effort into making their kits feel as close to stock as possible.

http://www.clutchmasters.com/shop/?p...94&ToYear=1998

I'll post up my impressions and the results when it's finished.

Reid

[SUPRASSS]

im doing my 6spd conversion this summer and i would also like to know

[StickyRice]

I drove a stock mkiv once and I have a rps cc also, and the pedal feels not much stiffer than that stock 97 car I drove. Taking off smooth with it is something else.

[JaguarXJ6]

This is a bit of a surprise to me. With a modded slave, the RPS CC I bought the car with had a pedal that was 30-40% lighter than stock, but chattery and very grabby as you well know. I don't think the LWFW contributed to this. If it was more well mannered around town or easier to slip smoothly, I would have kept it.

[95jza80tt]

I would suggest the HKS clutches but you need to be very careful in regards to if you get the GD Max or the GD Pro.. GD Max is a sprung hub while the GD Pro is unsprung and more of the on off switch, but both have extremely light pedal pressure. When I went from stock to the GD Pro twin disc it felt like I was stepping on a pillow when compared to the stock clutch.

[HellBringer]

GD Max is discontinued -- I tried to buy one about a year ago from MVP.

[1A1]

Stange-what PP do you have Stu-OEM Toyota or the new upgraded one with no straps? My CC is very street friendly.

Steve

[RikTT]

If you are considering a new clutch, not sure if you prefer twin or single disc at this point. I'd narrow some choices that way.

I will vouch for the SB as I have no issues or problems for the past 3yrs. Stg 3 775lb PP. I have since been on 500+ whp and no problems (93pump, 700+ C16). One main factor I choose this clutch over others is due to pedal feel, ~25-30% over stock and the traffic areas I encounter around NYC. My buddy has one as well. Ofcourse a good install can eliminate alot of error. Good customer support as well, if needed.

[Hurrakaine]

If you are considering a new clutch, not sure if you prefer twin or single disc at this point. I'd narrow some choices that way.

I will vouch for the SB as I have no issues or problems for the past 3yrs. Stg 3 775lb PP. I have since been on 500+ whp and no problems (93pump, 700+ C16). One main factor I choose this clutch over others is due to pedal feel, ~25-30% over stock and the traffic areas I encounter around NYC. My buddy has one as well. Ofcourse a good install can eliminate alot of error. Good customer support as well, if needed.

I have the South Bend stage one, it is softer then stock. My friend decided to get one to, and he says its softer then stock. Now I wish I had gotten a stage 2 or so, lol, it would probably have felt like a stock clutch. Order straight from South Bend so save a few hundred over ordering from Horspepowerfreaks.

[ophidicus]

If you are considering a new clutch, not sure if you prefer twin or single disc at this point. I'd narrow some choices that way.

I will vouch for the SB as I have no issues or problems for the past 3yrs. Stg 3 775lb PP. I have since been on 500+ whp and no problems (93pump, 700+ C16). One main factor I choose this clutch over others is due to pedal feel, ~25-30% over stock and the traffic areas I encounter around NYC. My buddy has one as well. Ofcourse a good install can eliminate alot of error. Good customer support as well, if needed.

I have the same clutch. Amazing Engagement slips easily and holds up to 775lb it's all about the install my mechanic is really good so no issues. No Crankwalk Fears for me because it's somewhat close to stock pedal feel.

[JustMe]

Any more updates from Stu or others having used this clutch for some time now?

[Reid@SP]

I have the same clutch. Amazing Engagement slips easily and holds up to 775lb it's all about the install my mechanic is really good so no issues. No Crankwalk Fears for me because it's somewhat close to stock pedal feel.

Glad to hear it's working out for you!!

[halcyon0]

I have the Tilton 4 plate carbon-carbon clutch and it is smooth as warm butter.

Can be a touch grabby though, but not too much.

[Stu Hagen]

Jeesh, for some reason I was not getting emails to the responses. I thought no one had responded....oops. Well to answer a few questions, I have I "think" the original design RPS. It is about 5 years old. But very few miles. I also have there chromally flywheel. It was brand new and installed by a master toyota tech and supra owner. It is not that it is bad clutch really, it's the fact that it is so on off thing. Granted, it is slipable once warm, but every time a friend drives it he kills the motor because it grabs quickly then dies.

Maybe a stock flywheel might fix this? Now that I will never be on the road course anymore, but an occaisional run at the strip at annual car events, it will just be a cruiser.

I dont understand why some feel that there RPS is lighter than stock. There is NO way mine is that. We have 4 supra's in the shop and all of them have lighter pedal than mine. I know one is a TRD but not sure on the others.

I have heard rave reviews on the SB, but I also have read that some cars cannot even get them to install. A local guy tried 3 times going back and forth with SB and eventually gave up cause the car would never disingage. Not sure what the issue was, install or clutch.

I will look into the clutchmaster and read up on what "stage" of SB to get. If I do go SB, I will have a good installer so I hope I wont have installation issues.

Maybe there is a possiblity it getting the RPS to work with changing out the chromally with an OEM? Also, I would like to hear about this upgrade slave you mention. Or modded one. What does this mean?

"RikTT" you say yours is ~20-30% stiffer than stock, is that because of the stage 3? Would a stage 2 be less? Like Hellbringer stated?

OK well first is to get rid of the snappy engagement. Possibly using the OEM Flywheel fix this? Modded slave? This might save me some bucks over a brand new install.

Stu

[RikTT]

"RikTT" you say yours is ~20-30% stiffer than stock, is that because of the stage 3? Would a stage 2 be less? Like Hellbringer stated?

Stu

A PP's clamping force can determine pedal pressure, so yes. It's only a 25-30lb tq difference between the SB stg 2/3 so opted for the stg 3 based on my end goals. Plus, I wanted that little extra clamp to avoid issues, if any.
In re-reading your orignal post, SB stg 2 seems good enough for you as well but my pedal pressure is pretty much well tolerable @ the stg 3 for DD for consideration. This past weekend, took a 2.5hr drive(Breast Ca benefit gathering) varying from stop-go traffic, cruising, ramping up/down thru rpm band, high WOT pulls, 5th gear accelerations etc & I was very happy with the results (575WHP). I run OEM flywheel via new FW bolts and no issues due to a good install.

Choosing a "grabby type disc", especially when heated up, could add snappy engagement coupled with a high clamping force PP, making DD a task - FWIW.

Rik

[StarletGTT]

The HPF Feramic with stock flywheel I heard isnt that bad and still holds 1000whp. Its also very slippable.

[skylinegtr20]

I have a carbonetics triple street.. it feels like stock + 5-10%. And it comes with everything so don't buy the slave and such!