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TurboKraft TurboKraft is offline
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Join Date: Mar 2005
Location: Phoenix, AZ
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About 930 4-speed clutches

Thanks Jeff, Tonger, Quack!

Long story short, we used to use a lot of KEP clutches, but over the years their quality control has definitely slipped.
* One every one installed the past 4-5 years, the pressure plate doesn't fit well in factory flywheel, the O.D. of the housing being slightly too large.
* We've had 2x where the release bearing didn't fit properly
* The clamping strength isn't consistent, and not as high as advertised -- 40-50wtq lower than we're told it will hold
* The range of motion does not seem as great

* The pedal effort is drastically higher than original
On this last point, I concede some people don't care if it is stiffer (settle down 'Knees) and are willing to live with a heavier clutch pedal. But I'd challenge everyone one of those people to spend a week with the car both ways -- one with a KEP clutch, and one with a Sachs Race Engineering (SRE) clutch -- and then still say they'd rather have the KEP.

About the only positive the KEP has going for it is price. On a 1978-88 930, a KEP aluminum pressure plate will save you approx.
$700 vs. a comparable Sachs 3.0L Turbo aluminum clutch + ring gear spacer + release bearing extension
$900 vs. a comparable SRE package (mid-level "Yellow Bird" pressure plate)
$1300 vs. a SRE 934/935 clutch package (highest level)
Yes, that is expensive, but so was your high torque engine that's routinely making over 550wtq, and you could easily drive this in L.A.'s stop-and-go traffic without the clutch wearing out your left leg.

KEP makes a tall aluminum G50 pressure plate for the 1989 Turbo and 1987-89 Carrera (original plate is iron and stupid heavy), but even with the hydraulic actuation it is much stiffer than a Sachs setup. Unfortunately, SRE discontinued their trick aluminum pressure pates for the G50 years ago, leaving only KEP to fill the gap if you wanted a lightweight clutch package...
...except now TurboKraft has adapted the 964/993 and 996/997 Turbo/GT clutch packages for the 1987-89 G50s with a standard bell housing, so owners have multiple aluminum clutch options again, as light or as heavy-duty as needed.

Centerforce re-works some of the standard Sachs road clutches internally, such as the tall housing clutches (1978-88 930, 1987-89 G50). They can achieve a little more clamping strength, withouth increasing the pedal effort much. They will generally hold the torque of a hot CIS 930, but not the torque of an EFI engine. Since they are starting with a stock part, the housing is the original heavy iron, just painted orange. The only lightweight option is the 1976-77 930 aluminum plate, but they cannot modify it internally for more clamping strength.
Chris Carroll
TurboKraft, Inc.
Tel. 480.969.0911
email: -
Old 01-13-2017, 09:43 AM
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