Fidanza users

[Ccmano]

Originally Posted by jss06c6

If the needle bearing was an issue, I'd expect you would see wear on the pilot shaft, but you've changed transmissions and no change, so nix that thought.. I'll get the clutch disc out to you today Hans.. something's off here (pun not intended!) and we sure need to isolate it..

Sent from my XT1585 using ZR-1 Net Registry mobile app

I appreciate your help Steve. If it was only the rattle at idle it would not bother me. But this grindy metallic shearing noise or Skill saw noise as some describe it at low rpm acceleration or load, particularly when hot, concerns me. Apparently some installers even consider it normal. At least I don’t appear to be alone. It will be a few weeks before I can pull it apart again.
H

[XfireZ51]

I gotta think Marc H is going to weigh in on this. How many of Fidanza owners
are using needle bearing pilot bearing or brass?
Did the buzzsaw noise gradually develop, or did it appear immediately after FW install?

[Ccmano]

Originally Posted by XfireZ51

I gotta think Marc H is going to weigh in on this. How many of Fidanza owners
are using needle bearing pilot bearing or brass?
Did the buzzsaw noise gradually develop, or did it appear immediately after FW install?

The noise was there immediately. I really don’t think the Pilot bearing is part of the issue. Both have been used successfully with stock and light weight FW’s. Both have their advocates.

I am a bit surprised the Marc and Bill B haven’t commented. From what we hear on this thread at least the noise is not that uncommon. Nevertheless there must be a reason.
H

[-=Jeff=-]

Bill B is a member here?

[9T1 Red ZR1]

I got my transmission back from Bill (ZFDoc) and installed it along with the new Centerforce sprung clutch disc. I still have the Fidanza light weight flywheel. Bill installed one of his short throw shifters and refurbished the transmission. I installed everything and am happy to say my gear noise in 5th and 6th gear is gone. No rattles or noises and it shifts great. Bill did a fantastic job and the ZR-1 drives great. =D>

Bill

[Vette73]

Hey Bill
You got the Dragon heart package from Dempsey correct? I remember seeing your car there when I dropped mine off awhile ago....

I'm going to try the sprung hub disc with my fidanza..It totally slipped my mind when Dempsey did the build..If I can eliminate the skill saw noise upon acceleration depending on the rpm, that will be a good thing...However, I am used to it by now since the car is only used for sport...

Just curious , did your tranny need refurbishing or you just decided to do it?

[XfireZ51]

Honestly, there should be no rattle from the single mass FW setup once in any gear.

[Ccmano]

I have two LT5 engines sitting in my garage right now. My old one (high miles) where the Fidanza, a brand new transmission and a sprung hub clutch caused considerable skill saw noise and the newer low mile one that has a Fidanza and a solid hub clutch that apparently had no noise. Some have theorized that the drain tube interfering with the flywheel could cause it. I see no signs of direct interference on either. I do note that the drain tube sits loosely against the oil pan on the old engine and tightly on the newer engine. I am theorizing the possibility that vibration set up by the flywheel gets the tube to vibrate against the pan generating the noise. If I vibrate the tube manually against the pan the noise emitted seems to be at a similar frequency. When I reassemble the new engine/ trans along with the sprung hub clutch I plan to either remove the tube altogether (most likely) or adjust the tube so that it does no contact the pan or block at any point. My mix of old and new parts will still not definitively answer the question once it’s back together.

What would be interesting is if some with this issue could get under their car and simply insulate the tube from the pan to see if it has an impact. I believe the bottom of the tube where it touches the pan is accessible from under the car.
H

[9T1 Red ZR1]

Vette73
Dempsey did do the Dragonheart package for me. It runs and looks awesome.

I wanted to have the transmission checked while I had it out. Bill did find some damage to 4th gear and the 4th gear synchro. I know he changed the shims to get an optimum set up. Hopefully, just the clutch will work for you.

Bill

[Vette73]

Originally Posted by Ccmano

I have two LT5 engines sitting in my garage right now. My old one (high miles) where the Fidanza, a brand new transmission and a sprung hub clutch caused considerable skill saw noise and the newer low mile one that has a Fidanza and a solid hub clutch that apparently had no noise. Some have theorized that the drain tube interfering with the flywheel could cause it. I see no signs of direct interference on either. I do note that the drain tube sits loosely against the oil pan on the old engine and tightly on the newer engine. I am theorizing the possibility that vibration set up by the flywheel gets the tube to vibrate against the pan generating the noise. If I vibrate the tube manually against the pan the noise emitted seems to be at a similar frequency. When I reassemble the new engine/ trans along with the sprung hub clutch I plan to either remove the tube altogether (most likely) or adjust the tube so that it does no contact the pan or block at any point. My mix of old and new parts will still not definitively answer the question once it’s back together.

What would be interesting is if some with this issue could get under their car and simply insulate the tube from the pan to see if it has an impact. I believe the bottom of the tube where it touches the pan is accessible from under the car.
H

Interesting.....You have Johnny 5s engine I believe...I spoke to him the day after Jim installed his fidanza...He did like the performance but he did say it was noisy..

Day after that I believe he got into the accident....I have that skill saw noise in my car.....Maybe it is something else....Before I do decide to install a sprung hub disc Which I don't know how to do) I will check what you suggested...
Thnx...