Bringing this back up. I build Ally's for guys locally and have always used Alto power packs with great luck. I do agree that the 8 c2 causing a sometimes firmer than expected 3-4 shift is not the greatest. Reading this thread I decided to test out the gpz clutches. I ordered some up and they arrived today. I was a bit surprised that the gpz c2 friction was the same size as stock. The alto is slightly larger increasing surface area which I would think would be a good thing. So is it the material that makes the difference? Thoughts.
Yes, material absolutely makes a difference!!! Borg Warner, Alto Power Pac, Alto Red, GPZ....they all have/use a different compound for their clutch lining (Some organic, some synthetic) and most kits even use different metals for their steels
They all provide a different amount of potential in a given working environment
I look at the frictions and steels much like a brake pad material and rotors...there are typically several options for any given application all yeilding a specific result for given working parameters.
The friction material wether it be on a brake pad or clutch needs to have its steel mating surface matched to it for temperature operating range ans surface friction needed. Otherwise one side will tear the other apart or just plain and simply not work and privide the friction necessary to do its job
Youre not going to use a set of brake pads designed for a set of carbon ceramic rotors, with OEM steel rotors... Even if the rotors might be exactly the same dimension, those pads wont get warm enough to provide adequate friction to work properly while at the same time they would literally be shredding the OEM steel rotor to bits
Same goes for the frictions and steels in a transmission
Thankfully, now more options are being made available for the Allison
Granted, the comparison between a brake pad compound and a clutch lining compound may be bery crude, but consider theyre both a friction/slip compound technically doing a very similar job...slowing moving metal parts, transfering energy and dissipating heat