ScienceofSpeed

ScienceofSpeed Clutch Set Comparison (for NSX)	transmission fitment	weight	torque capacity¹	pedal effort²	clutchengagement	notes
factory clutch set (1991-96)	5-spd 6-spd w/ shaft	35.4#		low	smooth
factory clutch set (1997-on)	all	43.9#		low	smooth

Exedy Single Cerametallic ("Stage 1")	all	~27#	300 lb/ft	medium	some chatter	moderate noise & shudder
Exedy Single Carbon ("Stage 2")	all	~26#	400 lb/ft	medium	some chatter	moderate noise & increased shudder - somewhat difficult to modulate engagement - recommended for track use only
Exedy Dual Cerametallic ("Stage 3")	5-spd 6-spd w/ shaft	~32#	550 lb/ft	medium	medium chatter	increased noise & shudder
Exedy Dual Carbon ("Stage 4")	5-spd 6-spd w/ shaft	16.1#	600 lb/ft	medium	high chatter	increased noise & shudder compared to stage 3 - somewhat difficult to modulate engagement - recommended for track use only.
RPS Single Disc Stage 1 (all years) recommended	all	24.2#	425 lb/ft	medium-high	smooth
RPS Single Disc Stage 2 (all years)	all	24.0#	500 lb/ft	medium-high	smooth
RPS Carbon Twin Disc Stage 3 (all years) recommended	5-spd 6-spd w/ shaft		700 lb/ft	medium-high	smooth	Ultimate high horsepower clutch. Capable of 700 lb/ft torque w/ smooth engagement.
ScienceofSpeed Clutch recommended	5-spd 6-spd w/ shaft	35.0#	325 lb/ft	low-medium	smooth
ScienceofSpeed Clutch recommended (w/ JUN lightweight flywheel)	5-spd 6-spd w/ shaft	28.8#	325 lb/ft	low-medium	smooth
About our recommendations: We have first hand experience with these clutches including installation, street driving, race track driving, and compatibility experience with cars producing increased horsepower. Based on this experience, we have recommended the clutches above. factory stock, naturally aspirated, supercharged applications up to 350 lb/ft: ScienceofSpeed Clutch upgraded supercharged / turbocharged applications up to 450 lb/ft: RPS Stage 1 high output supercharged / turbocharged applications exceeding 450 lb/ft RPS Stage 2 1: Torque capacity is a rating of the torque a clutch can hold once under normal operating temperatures and once fully engaged. This number is generally a rough calculation based on the surface area, friction coefficient, and clamping force used on the clutch. It should be noted that this figure is based on the clutch being fully engaged. Note these numbers are manufacture provided and/or estimated values. We recommend choosing a clutch that has 50% greater torque capacity than your intended application. A factory stock engine produces 200-225 lb/ft at the crank, supercharged applications 250-275 lb/ft. 2: This is a subjective rating based on the amount of effort required to actuate the clutch pedal in the cabin. 3: In order to assist customers with their decision, we developed this subjective "use scale" based on our actual experience with these clutches. Use scale is a subjective rating of a variety of factors including pedal effort and engagement characteristics: 1 = street clutch, 10 = race clutch for track use.