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Qik Nip
Joined: 16 Jan 2015
Posts: 130
Location: Kentucky
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 Posted: Wed May 13, 2015 12:31 am Post subject: NEED YOUR INPUT: CLUTCH SUPPLIERS |
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Well the 924 land speed build is progressing to the point where I need to get busy sourcing an upgraded clutch that will handle the application and neither of my old favorites (Exedy and ACT) offer anything beyond an OEM replacement unit. My consern is that an OEM replacement may not handle the increased torque.
To date I've only found one maker (SPEC) who offer anything beyond a OEM package. I'd really appreciate any leads on other suppliers who offer upgraded clutch packages, as well as any feedback on SPEC stage 1 or 2 clutch users.
Rick
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'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11 |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Wed May 13, 2015 12:36 am Post subject: |
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SPEC clutches have a good reputation, Centerforce do not, although I have no direct experience with either.
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erstwhile owner of just about every 924 variant ever made |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2595
Location: MI
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| Posted: Wed May 13, 2015 2:41 am Post subject: |
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Are you planning on running the original 924 na driveline?
Or thats probably a stupid question...
What kind of driveline are you planning on running?
I'm assuming you need much taller gearing... If you can get away with running a 931 bellhousing/clutch/torque tube you would have much stronger options as far as clutch and transmissions... And with a 931 snail trans you may be able to source gear sets to get you the ratios you need because it would accept 911 gears and would be the strongest trans as far as torque transfer pretty much of them all, with less weight and better center of gravity.
But then your looking at a 931 clutch not a 924, AFAIK the 924 trans doesnt like to take massive power..
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80 Turbo - Slightly Modified |
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Fasteddie313
Joined: 29 Sep 2013
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Location: MI
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Qik Nip
Joined: 16 Jan 2015
Posts: 130
Location: Kentucky
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| Posted: Wed May 13, 2015 3:23 am Post subject: |
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| Fasteddie313 wrote: | Are you planning on running the original 924 na driveline?
Or thats probably a stupid question...
What kind of driveline are you planning on running? I'm assuming you need much taller gearing... If you can get away with running a 931 bellhousing/clutch/torque tube you would have much stronger options as far as clutch and transmissions... And with a 931 snail trans you may be able to source gear sets to get you the ratios you need because it would accept 911 gears and would be the strongest trans as far as torque transfer pretty much of them all, with less weight and better center of gravity.
But then your looking at a 931 clutch not a 924, AFAIK the 924 trans doesnt like to take massive power.. |
The naturally aspirated class I'm running (Classic Production) has a lot of limitations since the spirit of the class is a "fairly" stock set up (meaning the parts had to be from a make and model of that car).
With that in mind, it will be a stock driveline (016 snailshell) with altered gearing. The engine is a 2 liter 13.7:1 NA block with a fairly extensively reworked Turbo head, fed by twin 48mm Webers and a custom header. The power won't be especially impressive, but iven the 924's low aero drag, I'm hoping that will be sufficient to top 160.
_________________
'79 NA 924 Land Speed Car
Bonneville G/CPRO record @ 149.825MPH
Arkansas Mile G/CPRO record @ 138.0 MPH
Great Lakes SCCA SM points champion '09,'10,'11 |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Wed May 13, 2015 3:30 am Post subject: |
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Stock NA clutch has been tested to 200hp on turbo/supercharged conversions of NA cars.
I suspect, but haven't proven it yet, that given the Audi nature of the engine and the compatibility of the starters with Audi sedans that a slightly Bette clutch might be available from someone like 034 Motorsports, etc.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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