| They tend to burn up clutches faster because they run hotter and the co-efficient of friction goes away on the clutch disc material as it heats up. They always are very blue with insane hot spots when you pull them out all the way through to the back side. I disagree. Yes I have seen the hot spots that you mention *but* if you take the metal plates off of any aluminum flywheel after some abuse you will see the same heat spots on *both* sides of the metal plates. The metal inserts are actually thinner then the JUN flywheel becuase they bolt on top of the aluminum flywheel. Also They are throw away when they get cooked. JUN says not to resurface them. I have been a JUN dealer for 4 years and I have never heard this from JUN??? That is the nice thing about the JUN being one piece is the fact that it is resurfaceable just like a stock flywheel. With insert flywheels you can replace the insert. True which is usually $100 or so. Resurface is ~$20-$30 The aluminum flywheels carry the heat away better. I disagree with this statement. Your clutch disc is on the Metal inserts and not on the Aluminum. The Metal inserts are thin and I would think they would heat up a lot due to being metal and as thin as they are. I do not have any hard data to back this up though so it is completely IMHO. The hard Chromemoly surface of the JUN slips sooner on a clutch dyno with the same pressure plate clamp load and the same clutch material. I would like to see proof of this We have several drag racers out here dumping the clutch at 6000 and 7000 rpm with the RPS flywheel and Max 6 puck and they are holding up very well. The RPS is the best Aluminum flywheel on the market no doubt. I sell both the RPS and the JUN and I personally like the JUN but the RPS is a very very close second.
Kyle "Grumpy Bear" Puckett
Sales@sgpracing.com
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