Join Date: Nov 2007
Location: Whitmore Lk., MI
05 6 sp. with 4.56 gears, ZR1 clutch, Edelbrock intake, Lunati cam, Crane rockers, C6 modified pan
Last winter I installed the upgraded version of the ZR1 clutch, to test it out for my future large cubic inch engine combo. This clutch is of the same design and made by the same manufacturer as the original, but is supposed to provide 20% more clamp load, with similar pedal feel. Well, I don't doubt the increased holding power, it's supposed to be good to 960 #ft, but I do dispute the similar pedal effort. My feeling is that pedal pressure is increased by 30-40%, for certain. Enough increase that it's uncomfortable in stop and go driving, unlike the stock ZR1 unit.
I'm in the process of re-installing the original stock ZR1 unit and running it until I have a problem, if ever. Possibly a larger bore master cylinder would help the Max version, but I'm not going there now! For comparison, the Max version is $750, while the stock version is around $420.
End of story for the immediate future!
"Strive for perfection in everything. Take the best that exists and make it better. If it doesn't exist, create it. Accept nothing nearly right or good enough."
Sir Henry Royce, of Rolls-Royce