Fidanza twin installed
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Fidanza twin installed
I just finished up the installation of a Fidanze twin disc with an aluminum flywheel. I have a couple of questions:
1.) The first couple of starts from a stop the engagement point was all the way at the top of the pedal and it slipped quite a lot. After about 6 or 7 more starts, it seems to have settled down and stopped slipping. Is this normal for a new clutch? Also the engagement point is not quite where I would like it to be. Can this be adjusted? Will it change by itself as the clutch gets broken in?
2.) I don't know whether or not this is related, but my speedometer no longer works. As far as I can tell it gets its feed from the individual wheel speed sensors. Is this correct? Any other idaes?
As far as the feel of the clutch, I have to say I am pretty impressed so far. The pedal is firmer than stock, but not bad at all. I will need a retune as a result of the reduction in rotating mass. The engine revs MUCH faster which means that the revs fall off just as fast; it wants to stall. I will post up results and thought after I have had a chance to put a few more miles on it.
TIA
Len
1.) The first couple of starts from a stop the engagement point was all the way at the top of the pedal and it slipped quite a lot. After about 6 or 7 more starts, it seems to have settled down and stopped slipping. Is this normal for a new clutch? Also the engagement point is not quite where I would like it to be. Can this be adjusted? Will it change by itself as the clutch gets broken in?
2.) I don't know whether or not this is related, but my speedometer no longer works. As far as I can tell it gets its feed from the individual wheel speed sensors. Is this correct? Any other idaes?
As far as the feel of the clutch, I have to say I am pretty impressed so far. The pedal is firmer than stock, but not bad at all. I will need a retune as a result of the reduction in rotating mass. The engine revs MUCH faster which means that the revs fall off just as fast; it wants to stall. I will post up results and thought after I have had a chance to put a few more miles on it.
TIA
Len
Tech Contributor
Joined: Jan 2007
Posts: 19,482
Likes: 1,173
From: Dyer, IN
I just finished up the installation of a Fidanze twin disc with an aluminum flywheel. I have a couple of questions:
1.) The first couple of starts from a stop the engagement point was all the way at the top of the pedal and it slipped quite a lot. After about 6 or 7 more starts, it seems to have settled down and stopped slipping. Is this normal for a new clutch? Also the engagement point is not quite where I would like it to be. Can this be adjusted? Will it change by itself as the clutch gets broken in?
2.) I don't know whether or not this is related, but my speedometer no longer works. As far as I can tell it gets its feed from the individual wheel speed sensors. Is this correct? Any other idaes?
As far as the feel of the clutch, I have to say I am pretty impressed so far. The pedal is firmer than stock, but not bad at all. I will need a retune as a result of the reduction in rotating mass. The engine revs MUCH faster which means that the revs fall off just as fast; it wants to stall. I will post up results and thought after I have had a chance to put a few more miles on it.
TIA
Len
1.) The first couple of starts from a stop the engagement point was all the way at the top of the pedal and it slipped quite a lot. After about 6 or 7 more starts, it seems to have settled down and stopped slipping. Is this normal for a new clutch? Also the engagement point is not quite where I would like it to be. Can this be adjusted? Will it change by itself as the clutch gets broken in?
2.) I don't know whether or not this is related, but my speedometer no longer works. As far as I can tell it gets its feed from the individual wheel speed sensors. Is this correct? Any other idaes?
As far as the feel of the clutch, I have to say I am pretty impressed so far. The pedal is firmer than stock, but not bad at all. I will need a retune as a result of the reduction in rotating mass. The engine revs MUCH faster which means that the revs fall off just as fast; it wants to stall. I will post up results and thought after I have had a chance to put a few more miles on it.
TIA
Len
Len,
You might have forgotten to hook up the VSS (vehicle speed sensor) on top of the differential. Worse case, something got damaged on the reinstall.
Tech Contributor
Joined: Jan 2007
Posts: 19,482
Likes: 1,173
From: Dyer, IN
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
I though I did, but you never know 
I had the drive train in and out twice (stupid issue with the slave feed line). I will check the connector tomorrow... I thought the feed for the speedo came from the wheel sensors; but I have been known to be wrong before.
Thanks!
I had the drive train in and out twice (stupid issue with the slave feed line). I will check the connector tomorrow... I thought the feed for the speedo came from the wheel sensors; but I have been known to be wrong before.Thanks!
Tech Contributor
Joined: Jan 2007
Posts: 19,482
Likes: 1,173
From: Dyer, IN
The wheel sensors are for the AH & ABS.
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
If the VSS is disconnected, it could cause a lot of other tune-related issues, since some PCM parameters are based on speed (or at least moving/not moving)
Are you getting a P0500?.
Are you getting a P0500?.
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Good point; I didn't check for codes No CEL so far. The car runs OK except for the issue fo stalling which could be related to the lack of VSS. Would that effect getting into reverse as well? I have never had issues with reverse until tonight.
Thanks for all the insight. I will be back under the car tomorrow
No CEL so far. The car runs OK except for the issue fo stalling which could be related to the lack of VSS. Would that effect getting into reverse as well? I have never had issues with reverse until tonight.Thanks for all the insight. I will be back under the car tomorrow
Tech Contributor
Joined: Jan 2007
Posts: 19,482
Likes: 1,173
From: Dyer, IN
Heel & Toe
Joined: Aug 2005
Posts: 18
Likes: 0
From: Stockholm
I just finished up the installation of a Fidanze twin disc with an aluminum flywheel. I have a couple of questions:
1.) The first couple of starts from a stop the engagement point was all the way at the top of the pedal and it slipped quite a lot. After about 6 or 7 more starts, it seems to have settled down and stopped slipping. Is this normal for a new clutch? Also the engagement point is not quite where I would like it to be. Can this be adjusted? Will it change by itself as the clutch gets broken in?
2.) I don't know whether or not this is related, but my speedometer no longer works. As far as I can tell it gets its feed from the individual wheel speed sensors. Is this correct? Any other idaes?
As far as the feel of the clutch, I have to say I am pretty impressed so far. The pedal is firmer than stock, but not bad at all. I will need a retune as a result of the reduction in rotating mass. The engine revs MUCH faster which means that the revs fall off just as fast; it wants to stall. I will post up results and thought after I have had a chance to put a few more miles on it.
TIA
Len
1.) The first couple of starts from a stop the engagement point was all the way at the top of the pedal and it slipped quite a lot. After about 6 or 7 more starts, it seems to have settled down and stopped slipping. Is this normal for a new clutch? Also the engagement point is not quite where I would like it to be. Can this be adjusted? Will it change by itself as the clutch gets broken in?
2.) I don't know whether or not this is related, but my speedometer no longer works. As far as I can tell it gets its feed from the individual wheel speed sensors. Is this correct? Any other idaes?
As far as the feel of the clutch, I have to say I am pretty impressed so far. The pedal is firmer than stock, but not bad at all. I will need a retune as a result of the reduction in rotating mass. The engine revs MUCH faster which means that the revs fall off just as fast; it wants to stall. I will post up results and thought after I have had a chance to put a few more miles on it.
TIA
Len
1) I went through this last summer with the same clutch. Very hard to notice the slip at start but slipping got worse and finaly i had to replace it(with an RPS). Actually there was a "dip" in power at 6000rpm that my tuner could not explain but who supected the clutch ?? Fidanza claims there are clutch slaves out there with wrong specifications(to "tall"). But since MY SLAVE barely can release my RPS clutch now i suspect that some of the fidanza dual discs are somewhat faulty. Mine will be shipped back to Fidanza for a refund. The new RPS cost me 3000$ installed
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
The slippage was obvoius the first couple of starts; and then started to go away. I cleaned everything with brake cleaner but all I can figure is that it takes a few starts to break the "glaze" on the new discs and flywheel.
Anyone else have any ideas?
Anyone else have any ideas?
Melting Slicks
Joined: Oct 2007
Posts: 2,464
Likes: 2
From: Cedarburg, WI
Which clutch did you install, the Fidanza 7.6?
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Drifting
Joined: Feb 2006
Posts: 1,585
Likes: 15
From: New Hartford IA
Do you have some sort of shim behind the slave? Sounds like the slave is pushing against the clutch spring even when released causing less clamp load on the disks. Having the clutch release at the top of travel tells you that there is not much(if any) free play between the slave and the clutch pressure plate diaphragm spring.
If you don't have a shim behind the slave then there is not much you can do. Most corvette problems are due to the release point being to close to the floor which poor bleading could cause and/or adding a shim could help, but in your case it's just the opposite.
If you don't have a shim behind the slave then there is not much you can do. Most corvette problems are due to the release point being to close to the floor which poor bleading could cause and/or adding a shim could help, but in your case it's just the opposite.
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Speedometer issue fixed I missed the VSS plug on top of the diff
Slippage issues gone
Engagement point still needs to be better understood, but I can live with it. I will call Fidanza Monday AM.
Thanks to all those who offered advice and suggestions!!
I missed the VSS plug on top of the diffSlippage issues gone
Engagement point still needs to be better understood, but I can live with it. I will call Fidanza Monday AM.
Thanks to all those who offered advice and suggestions!!
Heel & Toe
Joined: Aug 2005
Posts: 18
Likes: 0
From: Stockholm
Race Director
Joined: Nov 2001
Posts: 18,682
Likes: 4
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12
In my personal experience, if you forget to hook up the VSS plug, you will have problems going into reverse and the speedometer will not work. How are you liking your new 3.90s?
By the way, I am in your hometown right about now for my sister's wedding
Enjoy and be safe Len!
Thread Starter
Drifting
Joined: Sep 2006
Posts: 1,757
Likes: 13
From: Stillman Valley Illinois
Glad everthing worked out smooth with the differential install. I am still not a very good fan of the clutch that you chose.
In my personal experience, if you forget to hook up the VSS plug, you will have problems going into reverse and the speedometer will not work. How are you liking your new 3.90s?
By the way, I am in your hometown right about now for my sister's wedding
Enjoy and be safe Len!
In my personal experience, if you forget to hook up the VSS plug, you will have problems going into reverse and the speedometer will not work. How are you liking your new 3.90s?
By the way, I am in your hometown right about now for my sister's wedding
Enjoy and be safe Len!
Hi Nouman; The gears are everything you said they were except for one little thing ........ They are hard on cold tires
Sent you a PM