Spec Stage 3+ or Spec Twin?
Thread Starter
Instructor
Joined: Feb 2012
Posts: 165
Likes: 13
From: Frisco TX
Spec Stage 3+ or Spec Twin?
Hey All,
I am getting closer to getting my 383 Procharger build started back up again and after my research of looking at clutches I thought that a Spec Stage 3+ was the answer but another member has got me thinking that maybe I am going to need to return my 3+ and goto a twin disc set-up.... So my question is is anyone running a twin disc from Spec? What would you recommend for 550-650/700 HP range? Right now it will be mostly be a street driven car with occasional track use. Thanks so much!
I am getting closer to getting my 383 Procharger build started back up again and after my research of looking at clutches I thought that a Spec Stage 3+ was the answer but another member has got me thinking that maybe I am going to need to return my 3+ and goto a twin disc set-up.... So my question is is anyone running a twin disc from Spec? What would you recommend for 550-650/700 HP range? Right now it will be mostly be a street driven car with occasional track use. Thanks so much!
Thread Starter
Instructor
Joined: Feb 2012
Posts: 165
Likes: 13
From: Frisco TX
I called Spec and they were the original ones who told me that the 3+ would be good for upto their claimed 800+ hp and torque. I have been told that their numbers are a little on the high side from more than one person so I am looking for people who have experince with their clutches that can give me their best advice. I would like a Streetable clutch, I want to get more involved in autocross track type racing in the future but not get a clutch that is too agressive right now unless I need to. I had to throw out my dual mass flywheel so I have already purchased the Spec 3+ kit and the Steel flywheel with no extra mass. Thanks for your help!
Le Mans Master
Joined: May 2004
Posts: 5,386
Likes: 534
I would say you have the right setup for the gains you are expecting. I went with a 3+ but mine is just a NA 383. A bit overkill probably, but just in case I had aspirations to spray it later on, I wanted some extra assurance. As long as you have a sprung hub instead of a solid 3+, I think it should work well for you. Spec twin money is money better spent elsewhere on your car, I would say. I think the 3+ should be good anything other than big boost builds or big cube builds on big shots of spray.
Last edited by 1985 Corvette; Dec 16, 2014 at 04:00 PM.
Thread Starter
Instructor
Joined: Feb 2012
Posts: 165
Likes: 13
From: Frisco TX
I would say you have the right setup for the gains you are expecting. I went with a 3+ but mine is just a NA 383. A bit overkill probably, but just in case I had aspirations to spray it later on, I wanted some extra assurance. As long as you have a sprung hub instead of a solid 3+, I think it should work well for you. Spec twin money is money better spent elsewhere on your car, I would say. I think the 3+ should be good anything other than big boost builds or big cube builds on big shots of spray.
Le Mans Master
Joined: May 2004
Posts: 5,386
Likes: 534
The kicker here is I won't be thrashing it until the spring. What I can tell you is I almost went Spec 3 for the cost savings but after asking some questions and the potential power adders in the future if I wanted, the 3+ became the better investment. The 383 is a mild build so 450 hp is probably the ceiling but would be pleasantly surprised with a little more. I hear nothing but good things about the sprung hub 3 and 3+ units. You should have no worries. I window shopped the twin options for fantasy what-if build dreams, and it's definitely geared towards last resort, overkill power outputs.
Thread Starter
Instructor
Joined: Feb 2012
Posts: 165
Likes: 13
From: Frisco TX
The kicker here is I won't be thrashing it until the spring. What I can tell you is I almost went Spec 3 for the cost savings but after asking some questions and the potential power adders in the future if I wanted, the 3+ became the better investment. The 383 is a mild build so 450 hp is probably the ceiling but would be pleasantly surprised with a little more. I hear nothing but good things about the sprung hub 3 and 3+ units. You should have no worries. I window shopped the twin options for fantasy what-if build dreams, and it's definitely geared towards last resort, overkill power outputs.
Le Mans Master
Joined: May 2004
Posts: 5,386
Likes: 534
Well I'm no expert by any means but it's the torque that tries to overwhelm the clutch. The plus model is going offer higher resistance to torque loads. Last I checked the 3+ was rated at a 800+ lb-ft torque rating. Sounds perfect for your build and actually overkill for my little miniram 383.
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Thread Starter
Instructor
Joined: Feb 2012
Posts: 165
Likes: 13
From: Frisco TX
Well I'm no expert by any means but it's the torque that tries to overwhelm the clutch. The plus model is going offer higher resistance to torque loads. Last I checked the 3+ was rated at a 800+ lb-ft torque rating. Sounds perfect for your build and actually overkill for my little miniram 383.
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
I've got a 3+ with a lightened billet steel flywheel behind an LT4 with a "hot cam" and have nothing but good things to say about the combo