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Old 05-29-2012, 12:24 PM   #1
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Question High torque Duratec clutch opinions

I currently run an Exedy stage II clutch and flywheel combo on my turbo Duratec, but that only makes maybe 230wtq. My next GT2871 build I'm shooting for much higher, in neighborhood of 400whp/380wtq based on other dynos. (expect the full build in 2013)
FYI I am quite happy with the Exedy stage II at the current torque level, for anyone reading this looking for an Exedy review.

This is a good list: Duratec wiki - Clutches
However I'd like to hear real-world experience from Duratec owners making that level of torque and what clutch you went with and you likes/dislikes.

I'm leaning towards SPEC Stage 3+ and Fidanza flywheel.

I'm hoping some sites sponsors will chime in here also and provide professional opinions.

Thanks all




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Old 05-02-2013, 12:37 PM   #2
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Time to resurrect this question. Does anyone run a SPEC stage 4 or 5 on the street? How much frustration am I looking at to run such an aggressive clutch?
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Old 05-02-2013, 01:02 PM   #3
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I do not see the Exedy Stage II holding 400whp/380wtq for long given it is only rated up to 325ft/tq. I would recommend looking at the Exedy Stage III hyper single. Exedy does not include the slave cylinder, so you need to purchase one of those.

The Spec you would need the stage 5 for that much power.

Both are puck design clutch kits. Both are going to have quick and hard clutch engagement. Something you have to get used to. It is not going to drive like a factory clutch, but that is the trade off you have to make with that much power.

The Exedy kit would be little more friendlier to drive on the street than the Spec. The Exedy is a better kit. Exedy pressure plate is a much better design.

If you end up buying the Spec, I do not recommend to use the slave cylinder it comes with given it is not the original ford/LUK one.
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Old 05-02-2013, 01:07 PM   #4
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Quote:
Originally Posted by cfmfocus2 View Post
I do not see the Exedy Stage II holding 400whp/380wtq for long given it is only rated up to 325ft/tq. I would recommend looking at the Exedy Stage III hyper single. Exedy does not include the slave cylinder, so you need to purchase one of those.

The Spec you would need the stage 5 for that much power.

Both are puck design clutch kits. Both are going to have quick and hard clutch engagement. Something you have to get used to. It is not going to drive like a factory clutch, but that is the trade off you have to make with that much power.

The Exedy kit would be little more friendlier to drive on the street than the Spec. The Exedy is a better kit. Exedy pressure plate is a much better design.

If you end up buying the Spec, I do not recommend to use the slave cylinder it comes with given it is not the original ford/LUK one.
Thanks, that does help. I've gotten used to the aggressive 3-puck of the Exedy over the past few years. I've also scaled back my goals to stay in the low-mid 300whp range so I don't have to go to a return style fuel system yet. The Cossie-style intake manifold and only being a 2.0 should help keep the torque down.
I found an awesome deal on a SPEC stage 4 so I'm going to try it.
I'll stick with the OEM slave cylinder!
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Old 05-03-2013, 06:58 PM   #5
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low 300whp stick with your exedy stage 2. why waste the money. replace it if it starts to slip, but provided that you haven't abused it, it should hold the power.
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Old 05-03-2013, 08:14 PM   #6
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low 300whp stick with your exedy stage 2. why waste the money. replace it if it starts to slip, but provided that you haven't abused it, it should hold the power.
Why put a used clutch in a new build? It's been in there for 32,000 miles and counting and I'd rather do it all at once.
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Old 05-03-2013, 09:48 PM   #7
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Exedy Hyper Single.
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Old 05-09-2013, 01:28 AM   #8
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Why put a used clutch in a new build? It's been in there for 32,000 miles and counting and I'd rather do it all at once.
so be it. go with a hyper single then.
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Old 05-09-2013, 06:17 AM   #9
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I went with a Cosworth flywheel and a SPEC Stage 4 (6 puck) clutch. It will be a while (months) before I'll be replacing it, so I do have time to go a different route if necessary. Thanks for all the input.
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