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wjfk32's Avatar
 
Join Date: May 2008
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Best Clutch Set-up For 915-trainee For 930 Engine.

Greetings:

What is the best package, FEEL, STRENGTH, LONGEVITY. (Sachs, Clutchmasters etc.etc.). Opinions please..


Thnxs.
Old 07-25-2008, 07:08 AM
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Stock disc with an uprated pressure plate made by KEP. You can even opt for an aluminium one for some weight saving.
However, the stock clutch is probably strong enough to break that tranny anyway...
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 07-25-2008, 09:00 AM
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Crotchety Old Bastard
 
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Location: Huntsville, AL
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What do you mean by 915 trainee?
If you are putting a 915 behind a 930 engine it is wise to beef it a little. There are many threads on that subject. As for the clutch, I'm running the Sachs Sport. It's been in place for over 6 years now with no issues.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 07-25-2008, 09:28 AM
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Greetings:

Yes, I did open and changed parts in the 915, when rebuilding my engine in 1993. My 82SC Targar has been sitting in my heated garage for 9 years. So alot of parts have been recently changed. I just upgraded to a MSD6AL+ OIL COOLER UNDER R-FENDER WELL + AIRBOX-LID OFF. Rarly- I saw your pics factory airbox-upgrade-Nice!
I do not stress my 1st and 2nd gear.(IT WILL BE DESTROYED)... I do have a short shift. My revs go up so fast when boost comes in 2nd, that I have to be on my game to keep the car straight.
3rd and 4th gear is great. I am just trying to enjoying the car without breaking something. TORQUE is very addictive and very expensive when not used wisely.

ThnXS for the info Nathan & Rarly.

The best part of my car, its a real sleeper. Just seeing a ricer's face (911 Shooting Flames) on a friday evening in N.Y.
Old 07-25-2008, 11:25 AM
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If you do some searching there are people that have even broke 3rd gear too.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 07-25-2008, 11:59 PM
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Stock 915 clutch isn't enough for a stock RoW 930, it'll slip. A Sachs "Power Clutch" is basically a stock clutch (but hand-picked to be in the top 10% of stock clutches).

I just ran a Sach competition pressure plate (marked "ZF Sachs Race Engineering 3032 015 399") with a stock friction plate for 10,000 miles or so. No discernable slip even max torque up hills.

However, the stock friction plate was very low on material when torn down. Just replaced with a Sport plate, #88 1861 845. It's very different to the stock plate - much "grabbier". You can still slip the clutch, but the window between "in" and "out" is much smaller.

These are good threads on beefing the 915 The "How to beef up a 915" thread. Parts and costs?
sick 915/differential - diagnosis in progress

Even if you don't launch hard, take care to spin up the motor in N/A mode to over 3,000 before rolling on the throttle hard in 2nd etc. this is what a 330RWHP 930 can do to a 915 2nd gear:






Chris Powell said he'd never seen one fail like that before. I'm hoping it was just because it was an old gearset (stamped '72) and had probably had a hard life in a competition box before I got it. Time will tell...

That's an expensive paperweight right there. But the 915 shifts real nice with new synchros, sleeves, WEVO coupler etc.
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'77 S with '78 930 power and a few other things.

Last edited by spuggy; 07-26-2008 at 02:05 PM.. Reason: Fixed URL
Old 07-26-2008, 02:04 PM
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