A little background: Dave is also building a GT2 280Z racecar. About 2 weeks ago I drove down to Henrietta OK, to help him put the engine and transmission in the body. Since then he has found and resolved an ignition/timing issue with a missing screw in the distributor. Today I called Dave to see how things were progressing and he said not so well. His clutch does not seem to be completely disengaging. Interesting, because when I put in an aluminum flywheel in the 280ZX about a year ago, I had all sorts of problems with the clutch not disengaging. So I suggested that he might want to get a bar clamp and place it on the clutch fork and tighten it down (this is what I did) and see if the clutch would completely disengage. If so this leaves two possibilities the clutch fork rod is the wrong one and is too short. Or the release bearing is too short. He mentioned that he had heard that there were 2 different release bearing sleeves one for a 225mm clutch and one for a 240mm clutch. Just coincidently I had the transmission out of the racecar and I could get to a known 225mm release bearing sleeve. I also had the one that I was in the 280ZX 2+2 when I was having all of the clutch issues after the aluminum flywheel install. So I measured them side by side with the digital calipers. Look below.
225mm release bearing sleeve so the coupe is longer
Don’t you love it when it takes you about a year to positively figure something out?