AMR clutch and flywheel first impressions
Discussion
EVR said:
Do I sense a 2-cars trip from Italy to Bamford Rose coming up? 
I am seriously thinking about it.I had also thought to buy the BR kit and having it mounted by Aston Martin Milano. Do you know the team? They are good and understanding guys.
Before asking to the Milan's guys i would like to have sure information on the differences between the BR kit and AMR kit.
Bamford Rose is far away but a 2-cars trip is more fun.
We will talk about it when we meet for tour of Swiss passes
Misterblu said:
I am seriously thinking about it.
I had also thought to buy the BR kit and having it mounted by Aston Martin Milano. Do you know the team? They are good and understanding guys.
Before asking to the Milan's guys i would like to have sure information on the differences between the BR kit and AMR kit.
Bamford Rose is far away but a 2-cars trip is more fun.
We will talk about it when we meet for tour of Swiss passes
I know Antonio in Milano fairly well now, he is a good guy. But last time I was there, he mentioned something about not installing kits coming from elsewhere. I was said en passant, not during a proper discussion, but to be investigated.I had also thought to buy the BR kit and having it mounted by Aston Martin Milano. Do you know the team? They are good and understanding guys.
Before asking to the Milan's guys i would like to have sure information on the differences between the BR kit and AMR kit.
Bamford Rose is far away but a 2-cars trip is more fun.
We will talk about it when we meet for tour of Swiss passes
Sure let's meet and talk about it, I'll send you a PM with my details.
Finally, part 2 on clutches & flywheels from Red Pants, very useful info.
https://www.youtube.com/watch?v=jzRKP9WMkbY
https://www.youtube.com/watch?v=jzRKP9WMkbY
I have installed the AMR twin plate clutch in my 2006 V8 Vantage a couple of weeks ago. After some 500km of break-in phase I drove some nice roads through the Alps and noticed that the clutch engages way slower over 7000rpm.
At 7000 or below the clutch behaves like a dream, but over 7000 the pedal needs sensibly more time to return and therefore the clutch to engage.
Did this happen to anyone here?
At 7000 or below the clutch behaves like a dream, but over 7000 the pedal needs sensibly more time to return and therefore the clutch to engage.
Did this happen to anyone here?
Edited by lestrat on Sunday 4th October 21:30
When I mistakenly go over 7,000 rpm, within moments the rev cut out activates, which usually comes as a surprise to me, because it is something I try to avoid. Usually too busy looking at the road ahead whenever 7,000 rpm is used, hence not looking at the tachometer.
Are you talking Sportshift?
I think any pedal lift should disengage the clutch at the rate of pedal lift, irrespective of engine speed, unless the clutch is slipping.
I am talking manual. The clutch pedal engages and disengages always in the same point, that is not the issue; there is no clutch slip or drag.
The problem that I am experiencing is that the clutch pedal returns slower (only when changing over 7000rpm), therefore it gets to the engage position with a delay (0.5 - 1 seconds) compared to what it does in the rest of the rev range.
Our cars deliver max power over 7000rpm in their stock form, we are expected to rev over there if we want to squeeze all the performance they can deliver.
The problem that I am experiencing is that the clutch pedal returns slower (only when changing over 7000rpm), therefore it gets to the engage position with a delay (0.5 - 1 seconds) compared to what it does in the rest of the rev range.
Our cars deliver max power over 7000rpm in their stock form, we are expected to rev over there if we want to squeeze all the performance they can deliver.
lestrat said:
I am talking manual. The clutch pedal engages and disengages always in the same point, that is not the issue; there is no clutch slip or drag.
The problem that I am experiencing is that the clutch pedal returns slower (only when changing over 7000rpm), therefore it gets to the engage position with a delay (0.5 - 1 seconds) compared to what it does in the rest of the rev range.
Our cars deliver max power over 7000rpm in their stock form, we are expected to rev over there if we want to squeeze all the performance they can deliver.
Strange. I have difficulty to imagine a technical reason for such behaviour - it's the same spring pushing back at the slave bearing at any RPM.The problem that I am experiencing is that the clutch pedal returns slower (only when changing over 7000rpm), therefore it gets to the engage position with a delay (0.5 - 1 seconds) compared to what it does in the rest of the rev range.
Our cars deliver max power over 7000rpm in their stock form, we are expected to rev over there if we want to squeeze all the performance they can deliver.
Yes, I find it extremely strange too.
I don't know whether it happens because of the vibrations that the clutch has at such high revs, caused either by the clutch itself, the torque tube or even the engine; or any other reason such as clutch not completely broken in and not perfectly bedding-in yet, some sort of delay valve in the clutch similar to that of the BMWs... no idea, but it is extremely frustrating.
I don't know whether it happens because of the vibrations that the clutch has at such high revs, caused either by the clutch itself, the torque tube or even the engine; or any other reason such as clutch not completely broken in and not perfectly bedding-in yet, some sort of delay valve in the clutch similar to that of the BMWs... no idea, but it is extremely frustrating.
lestrat said:
Yes, I find it extremely strange too.
I don't know whether it happens because of the vibrations that the clutch has at such high revs, caused either by the clutch itself, the torque tube or even the engine; or any other reason such as clutch not completely broken in and not perfectly bedding-in yet, some sort of delay valve in the clutch similar to that of the BMWs... no idea, but it is extremely frustrating.
This is very strange... Does it happen both going upshifting and downshifting? Because on upshifting, I just dont see how the clutch would be engaging when over 7k revs, due to the drop in revs for the next gear. For example, say you change from 2nd to 3rd at the redline, that same speed in 3rd gear will not be over 7k revs when the clutch engages. Downshifting is a different story of course...I don't know whether it happens because of the vibrations that the clutch has at such high revs, caused either by the clutch itself, the torque tube or even the engine; or any other reason such as clutch not completely broken in and not perfectly bedding-in yet, some sort of delay valve in the clutch similar to that of the BMWs... no idea, but it is extremely frustrating.
It happens only in upshifts, or at least I was able to reproduce it only in upshifts.
So that means, 2nd gear rev up to let's say 7300rpm, press clutch pedal, change gear, release pedal, irrelevant how the revs will drop the clutch pedal return is delayed, while if I do the same process at 6800rpm, the clutch returns perfectly fine (being the drop in revs quite similar).
As I said, there is no clutch slip, actually even though the pedal return is delayed, the engage can be harsh.
So that means, 2nd gear rev up to let's say 7300rpm, press clutch pedal, change gear, release pedal, irrelevant how the revs will drop the clutch pedal return is delayed, while if I do the same process at 6800rpm, the clutch returns perfectly fine (being the drop in revs quite similar).
As I said, there is no clutch slip, actually even though the pedal return is delayed, the engage can be harsh.
Edited by lestrat on Monday 5th October 16:02
Edited by lestrat on Monday 5th October 16:19
I'd be taking that back. You're within the normal operating range of the engine but the clutch seems to be malfunctioning at over 7000 rpm. Perhaps there's something within the new clutch assembly affected by centripetal forces generated when the engine exceeds 7000 rpm - it's the only thing I can think of.
lestrat said:
It happens only in upshifts, or at least I was able to reproduce it only in upshifts.
So that means, 2nd gear rev up to let's say 7300rpm, press clutch pedal, change gear, release pedal, irrelevant how the revs will drop the clutch pedal return is delayed, while if I do the same process at 6800rpm, the clutch returns perfectly fine (being the drop in revs quite similar).
As I said, there is no clutch slip, actually even though the pedal return is delayed, the engage can be harsh.
Have you talked to your workshop already, what do they say?So that means, 2nd gear rev up to let's say 7300rpm, press clutch pedal, change gear, release pedal, irrelevant how the revs will drop the clutch pedal return is delayed, while if I do the same process at 6800rpm, the clutch returns perfectly fine (being the drop in revs quite similar).
As I said, there is no clutch slip, actually even though the pedal return is delayed, the engage can be harsh.
The only thing I could imagine is the clutch plates sticking in the open position due to (still) too tight tolerances.
However how su a small rev difference of 500RPM should make such an impact is bejond my understanding.
TR-Spider said:
Have you talked to your workshop already, what do they say?
The only thing I could imagine is the clutch plates sticking in the open position due to (still) too tight tolerances.
However how su a small rev difference of 500RPM should make such an impact is bejond my understanding.
Unfortunately not yet, this week has been a nightmare in work, so far. I hope that I can pay them a quick visit on Friday.The only thing I could imagine is the clutch plates sticking in the open position due to (still) too tight tolerances.
However how su a small rev difference of 500RPM should make such an impact is bejond my understanding.
As soon as I have any news, I will post here.
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