Clutch recommendations?

Re: Clutch recommendations? (Tree)

Tue, 20 May 2014 14:27:56 GMT

Mmm that explanation was more than I could ask for so much appreciated. No need for textbook when we have Mr MCT here lol
Rick I suppose it comes down to personal preference then, I remember the prices when I got mine done was $180 OEM vs $300 for HD both Exedy which would've been worth it at the time. My clutch might be OEM but I have my clutch pedal setup to be very short so it still somewhat "sporty" I suppose

For the record and for you NA guys, I was also guilty of dumping the clutch LOL (and it was a wet day too which should've been "easier" on the car " />, well I guess it makes sense since the first engine died, so it's logical it was next)

Re: Clutch recommendations? (MCT_MR2)

Mon, 19 May 2014 22:49:35 GMT

How much harder it is on the tranny really comes down to the person operating the clutch pedal. The clutch disc itself is still for the most part the same, it has an organic facing with a sprung centre, and most of the time will have a near identical compsition from the springs and dampers in the centre, and the organic lining is almost identical. The heavy duty comes in from the additional clamping force in the clutch cover assembly. The ratio ie pivot of the diaphragm fingers is usually altered to keep a near stock pedal effort, but the springs etc allow it to provide a higher clamping force, which gives the clutch a better resistance to slipping while disengaged and power is applied.

So as long as the operator of the vehicle is smooth in the disengagement of the clutch, the difference in shock load to the gearbox is minimal. Dumping the clutch on the other hand will obviously create a higher shock load.

This is why companies like nismo and jim berry are able to create high power/torque capable single/multi plate clutches with organic friction plates. They select an organic based full faced clutch disc that has a high heat resistance (copper mixed sachs discs are common) and use a high clamping force clutch cover with a good ratio for minimal increase in pedal effort.

For example, jim berry built a single plate clutch for a customers 400awkw gtr. It had a single plate copper organic sprung centre with a 5700lb clamp pressure clutch cover. As he isnt a magician, the pedal was quite heavy, but it had the manners of a near standard clutch. The standard gearbox held up for 5 years, until the customer took it to calder park and tried dumping the clutch at 6500rpm.

Hope that explanation helps

Re: Clutch recommendations? (MR2QIK)

Mon, 19 May 2014 19:47:41 GMT

Can't speak for s54, but for e153, they're tough & will handle it without issue. I've used just about every clutch type over the years except carbon & only synchros have ever failed me.

Re: Clutch recommendations? (rikkir)

Mon, 19 May 2014 19:21:38 GMT

Tree
Hey do you guys think the HD clutch might be a little harder on the tranny over stock? I went with stock (still feels good after 2.5 years and couple track days) since the car being mid engined it's already harder on the box than FR.

Just talking S54 tranny here not the E153. Reason I ask is my diff just gave out :(

I was actually wondering the same thing.....

Re: Clutch recommendations? (Tree)

Mon, 19 May 2014 16:19:26 GMT

Hey do you guys think the HD clutch might be a little harder on the tranny over stock? I went with stock (still feels good after 2.5 years and couple track days) since the car being mid engined it's already harder on the box than FR.

Just talking S54 tranny here not the E153. Reason I ask is my diff just gave out :(

Re: Clutch recommendations? (MIDN1T3)

Fri, 16 May 2014 08:50:29 GMT

+1 for the Exedy Heavy Duty clutch.
I put one in my Gen 3 3sgte about almost 5 years ago and it has been awesome - never slipped, easy in traffic but still bites hard when fully engaged.

Re: Clutch recommendations? (MR2QIK)

Fri, 16 May 2014 00:10:37 GMT

I'd go the heavy duty personally for a bit of extra piece of mind & flexibility. Especially if you plan on giving it a bit of grief.

Overall cost might be double, but not near the cost of twin plates etc.

Re: Clutch recommendations? (rikkir)

Thu, 15 May 2014 22:38:20 GMT

Exedy have both an oem replacement or a heavy duty option that is double the price. Is the heavy duty kit worth the extra?

Re: Clutch recommendations? (MR2QIK)

Thu, 15 May 2014 22:14:57 GMT

Non organic don't last as long with street driving (traffic etc). They basically don't like being ridden. Many turbo owners use organic exedy clutches, if it can handle that it can handle a beams.

Re: Clutch recommendations? (MCT_MR2)

Thu, 15 May 2014 20:47:28 GMT

Non organic clutches are more prone to shuddering, and noise on disengagement. Ie. Copper and metal. Carbon arent greatly suited to street use as they dont last long with stop start traffic, and kevlar clutches shudder.

Re: Clutch recommendations? (rikkir)

Thu, 15 May 2014 20:19:18 GMT

What's the difference with organic?

Re: Clutch recommendations? (MR2QIK)

Thu, 15 May 2014 20:14:50 GMT

If its organic, definitely go for it.

Re: Clutch recommendations? (stuka)

Thu, 15 May 2014 19:24:46 GMT

I agree Exedy heavy duty is good with near stock clutch pedal feel.

Re: Clutch recommendations? (rikkir)

Thu, 15 May 2014 19:09:14 GMT

Thanks mister2

Re: Clutch recommendations? (mister2)

Thu, 15 May 2014 18:57:16 GMT

When I did my RedTop swap, I fitted an Excedy TYK-6914HDB (Heavy Duty Clutch Kit). Feels perfectly normal, though there's a non-heavy duty option listed too on the Excedy website for the RedTop MR2:

You can find it listed @: http://www.exedy.com.au/clutch-finder
(Go to the 1998, {149km} model) - Listed as 12/97-10/99, @d Coupe, RWD, AT/MT, (Japan) .
The page then confirms the selected vehicle as : TOYOTA MR2 SW20 12/1997~10/1999 3SGE 1998 cc I 4cyl 16 valve DOHC PETROL MPFI 2 Door Coupe RWD Auto Man