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auh auh is offline
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clutch question

can you put a turbo clutch in an '84 NA?

Mine doesn't have many miles left on it...and I know a turbo clutch will last longer than a regular one.
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1974 914 1.8 Sold...
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1990 Nissan 240sx fastback aka Japanese 944
Old 04-10-2005, 07:07 PM
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A regular rubber center clutch can last over 100k miles if driven properly. I'm not sure about compatibility though as far as the clutch is concerned.
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Old 04-10-2005, 07:09 PM
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I belive the turbo clutch is different
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Roger Hall

81 924 N/A

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Old 04-10-2005, 08:35 PM
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Learn to use your resourses.

Read the description for the clutch kits.

http://www.pelicanparts.com/catalog/shopcart/944M/POR_944M_clutch_pg1.htm
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
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Old 04-10-2005, 09:29 PM
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Ummm, is this not a resource?
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1974 914 1.8 Sold...
1984 944 my baby...more of a pain in the @$$ than takin' it with a cucumber, but I still love it. THE CAR YOU PERVS!!!!!!!!!!!!
1990 Nissan 240sx fastback aka Japanese 944
Old 04-10-2005, 10:43 PM
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And "this" is sponsored by Pelican Parts. Why ask your mother to cut your food up when you can do it yourself.

Notice on Pelican Parts that the listings for the rubber center clutch indicate they are no longer available.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 04-11-2005, 06:19 AM
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I apprecieated the question and think so cal is a grumpy old man!!

However, I to in turning 22 that i am becoming slightly more grumpy myself anyway I will stop rambling

NO ONE SHOULD BE AFRAID TO POST ANY QUESTION "EXCEPT HOW TO TURBO"
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83 944na
Old 04-11-2005, 07:59 AM
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Give me a call in thirty years and we'll talk about your view of "youngsters".

The point is; learn to use your resources. Where the H do you think we get our info from????

I have a 16 year old that is learning to use his resources.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 04-11-2005, 12:47 PM
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haha
point taken
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Old 04-11-2005, 03:22 PM
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No one seems to have helped you much on your original question so I will throw in some thoughts based on what I saw when I was looking for clutch parts for my 951S.

The stock NA clutch disc has a smaller diameter than the turbo. So you would have to make sure the turbo clutch disc diameter would fit the flywheel and pressure plate. You need to dig up the dimensions on the NA and turbo flywheels to sort this out.

I also seem to recall there is some conflict with the bell housing on the NAs. As in something like the turbo pressure plate will hit the NA bellhousing. I didn't pay much attention to this as I have a turbo but I remember a footnote in the Sachs catalog which noted the conflict.

Finally, if this all works out for you, there are at least two different spring clutch discs that are used in the turbo. The standard one has an outer ring of big springs and an inner ring of 6 little springs. You probably want to avoid this disc as the 6 little inner springs like to break and jump out of their holder. Then your clutch won't fully disengage because the springs jamb between the disc and pressure plate and time for a new clutch job. So many people, myself included, go with the Cup Clutch disc. It is also known as heavy duty, sport, etc. It doesn't have the inner ring of little springs.

The 930 disc is also used on some high HP turbos but you don't need that for a NA and it is also sort of expensive.
Old 04-12-2005, 06:04 AM
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Thank you IceShark... The only reason I threw out the question was because I was thinking a turbo clutch would last longer in an NA than a regular NA clutch. For this cup clutch, I assume one is made for the NA, where could I find one? and about how much do they run?

Thanks
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1974 914 1.8 Sold...
1984 944 my baby...more of a pain in the @$$ than takin' it with a cucumber, but I still love it. THE CAR YOU PERVS!!!!!!!!!!!!
1990 Nissan 240sx fastback aka Japanese 944
Old 04-12-2005, 07:03 AM
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As 944 clutches usually last upwards of 80k miles, I'm wondering why you would think one designed for competition use would last longer?
Just install the latest stock Sachs one, replace the lever shaft and bearings. Make sure the lever is in good condition or replace it. Reface the flywheel, replace the crank oil seal, release bearing guide tube and anything else even slightly suspect and it will be fine.

The rubber center disc has been discontinued and is no longer available.
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Old 04-12-2005, 08:38 AM
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Most of the parts vendors carry the Cup disc (that is the only thing that is different from stock) or can get it. I paid $623 for the disc, PP and throw out bearing. But you have to resolve this possible fitment issue on the NA via some research.

Britwrench, I think he should go the Cup route if he can, not because he needs to be able to hold higher torque, but because he can avoid the inner ring of 6 springs. I lost two of those suckers in my stock clutch with only 42,000 miles and I'm not alone in that experience.

Definately take the flywheel in for re-surfacing and that is only about $30. Get all new bolts, bearings, crank seal, guide tube, etc. You probably don't need to get a new clutch fork (which is over $300) but take a look at the old one. Some people have managed to crack or bend it. And look at the surface of the fingers where it grabs the TOB to make sure they are not worn too bad. If your TOB is so shot that it is seizing then it may do a number on the fingers.
Old 04-12-2005, 10:12 AM
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Ice Shark, I see your view on the clutch springs. I have only ever seen this, maybe twice, since working on 944s and other cars. It all depends on lots of circumstances, but we use the Sachs OEM clutches here and have never had a warranty or any other problem.
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Old 04-12-2005, 06:02 PM
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Thank you for all of your imput, I think I am just going to go for a Sachs clutch though as they are the cheapest and Britwrench says it will last upward of 80k miles. Thats good enough for me.
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1974 914 1.8 Sold...
1984 944 my baby...more of a pain in the @$$ than takin' it with a cucumber, but I still love it. THE CAR YOU PERVS!!!!!!!!!!!!
1990 Nissan 240sx fastback aka Japanese 944
Old 04-12-2005, 07:40 PM
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"The stock NA clutch disc has a smaller diameter than the turbo. So you would have to make sure the turbo clutch disc diameter would fit the flywheel and pressure plate. You need to dig up the dimensions on the NA and turbo flywheels to sort this out."

IceShark's right on. I think the clutch disc is 225mm on the NA and 240mm on the 951. The 951 clutch has a different disc, pressure-plate and bell-housing. The hole for the starter is moved outwards a little to line up with the teeth on the larger-diameter ring-gear. Also there are 132 teeth on the 951 ring-gear and 130 teeth on the 944NA. The computers are programmed with these in mind, so you can't swap in a 951 clutch without replacing the harness and computer as well.

As for durability, it really depends upon your power-levels and driving-style. I shift often without using the clutch at all, so mine tends to last a long time. I got 254K-miles out of the original cluctch on my previous Supra. But that car also went the entire distance on the original water-pump, ball-joints, brake-rotors, CV-joints, alternator, as well, so I'm not sure the driver had as much to do with that.

But on my 951, the original owner replaced the stock clutch at 40k-miles with a Cup clutch (gripper disc). I bought the car with 30K-miles on that clutch and upgraded the car to about 350bhp and the clutch was toasted at 40k-miles. I put in a CenterForce Dual-Friction clutch kit because of their claimed 90% higher clamping-force than stock. The highest I could find available. I rebuilt the engine 2-years ago and measured the wear. At 80K-miles, it was only 1/2 worn, so I would assume that its lifetime is about 160K-miles, or about 4x more than the Cup clutch package..
Old 04-13-2005, 07:03 PM
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