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Thinking about re-building my differential. I'm going to be running a supercharger, but it is also my DD. Looks like 3 or 4 clutches, are both an upgrade. But 4 clutches costs a little more money. Is it worth it to do the 4 clutch diff?
Thayer Motorsports recommends 4 clutches for FI.
• Built S52 w/Dinan ISR-3 kit, NickG Stage 2+ Tune, Dinan Vortech V2 Supercharger, Dinan Air to Air Intercooler, Dinan CAI, Porsche 803 HFM, Buldogge 6" crank pulley, Griptec 2.90" blower pulley, Eurosport UD pulleys, Dinan 3.38 Diff, Dinan front/rear Swaybars, Dinan springs, Koni Yellow Sport Struts, Ground Control end links, South Bend Clutch Stage 3 Organic, AASCO Light Weight Flywheel 18.5#, Zionsville Radiator & Oil Cooler, Riot Racing BBTB, Schrick Intake Manifold, 42# Injectors, Schrick cams 264/256, Forged Wiseco pistons 9.0 comp., Forged Eagle rods, Supertech dual valve springs & valves, VAC crank & bearings, Supersprint mufflers, Euro Z3 midpipe, Raceland euro headers, Walbro 255, Bevauto ignition coils, Vortech Mondo bypass, Bailey Diverter DV30, Ireland Rear Subframe Bushings, Mason Engineering Strut Brace, Mason Engineering Clutch Petal, Apex 18" EC-7 Wheels, Full Custom Sound System, two trunk lids (with & without OE spoiler), Hardtop, Trunk full of AK's...
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I have a 4 clutch for sale
More clutches means the car goes more straight. So mo is mo bettah.
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I ran a 3 clutch with supercharger and thought it worked well. 10 psi from a Vortech on an s52 won’t make big torque like turbo. Even for most turbos at 10 psi, it would be a good enough improvement. 4 clutch costs more and can have some noticeable side effects on deceleration on turns, but would be my choice for a 500 lb rwtq turbo car.
Last edited by pbonsalb; 12-02-2017 at 08:33 AM.
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Here in s my worthless $0.02. Considering having had/built fresh 2/3/4 clutch diffs.
Doing a fresh 3 clutch has its advantages in cost. A big advantage.
A 4 clutch not only is more money for the kit but also down time for machining of the LSD cover. That being said, if you have the extra time/money to burn a 4 clutch will technically be better. How much better ? Little bit. Not overwhelming tho. A 3 clutch freshen up is a couple hours of work.
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^ i think it was bimmerdiffs but the website sells a machined cover to fit the 4-clutch with the core charge it's like $50.
my experience is just from a worn out whore of a diff from the 80's vs one from a 2000 mcoupe. amazing difference. just amazing.
don't know how dramatic a 4clutch is from a relatively new 2clutch though.
The worn out one btw would get suppper sideways.
like drifting style no exaggeration. The new one slides me pretty straight. 100mph burn outs no problem.
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