kmetiuk
10+ Year Contributor
- 521
- 125
- Mar 10, 2010
-
Edmonton,
AB_Canada
I'm in the middle of planning my engine build and when I dissembled the clutch I found that my ACT 2600 PP had uneven wear on it.
Background:
This was/is a ACT 2600 with a street disc mated to a stock flywheel. The flywheel was not resurfaced (at a shop anyways) when I installed it but it was in a car I bought from a much older gentlemen who is a Proff at a University so he likely wasn't racing and being mean to it. The car had 130,000km's or 81,000 miles. Everything in the car was mechanically sound minus the rusted out frame. The flywheel looked fine when I installed the ACT and I roughed up the surface of the flywheel to knock off the any glazing (as per jafro vids). I drove HARD on this clutch and had some terrible launches that overheated the clutch no more than 5 times until I figure out how do it properly (learning still). I got around 16,000 km's (or 10,000 miles) on it before my 7-bolt let go and I pulled it to build my 6-bolt up.
Disclaimer: To me this clutch has a lot of heat spots on it and I know I overheated the shiiit out of it a few times so its in need of some love.
When I measured the clutch disc I found that it had taper to it and the ouside edge was worn down to just before where the ACT service limit was on it. B/c it was tapered I checked the flywheel and the PP for taper and both had a slight taper to it as well so I'm guessing that I should have resurfaced the flywheel flat the first go around.
1st question: should a PP have a taper to it all? This was a brand new ACT and its only had 1 street disc in it ever and the KM's seem to low to me to have a taper to it. Do PP have a taper on them when they are unloaded and out of the car? I would think it should be flat no? I am curious as the spring in it could be causing deflection in it when unloaded but I am not sure and am learning still.
2nd question: From the pics below (specifically the 2nd pic where I outlined in red) I found that the PP has worn semi evenly. In the outlined pic you can still see the original machining on it. What would cause the uneven weird wear and what can I do to fix it? When I installed it I made damn sure to clean the flywheel "step" surfaces off and also made sure there was nothing in between the PP mounting points and the flywheel. It was toruqed properly in sequence and I made sure to hand tighten all the bolts all around in sequence to marry the PP to flywheel in a parallel manner. I also was very easy on the clutch at the beginning and broke it in properly and then after about 2000 kms tried some launches. To me the PP should have worn evenly all over (even with the taper).
This is where the eneven wear is....you can still see the original maching marks. Seems weird to me that I would go through a whole street clutch disc and there still see some machining marks in the PP.
Finger wear is very very minimal....it looks (is) near brand new looking still.
Lemme know what you think...any and all criticismm, ideas, and comments are welcome. Be harsh as I need to learn here and I do not want to burn out a another disc prematurely.
Background:
This was/is a ACT 2600 with a street disc mated to a stock flywheel. The flywheel was not resurfaced (at a shop anyways) when I installed it but it was in a car I bought from a much older gentlemen who is a Proff at a University so he likely wasn't racing and being mean to it. The car had 130,000km's or 81,000 miles. Everything in the car was mechanically sound minus the rusted out frame. The flywheel looked fine when I installed the ACT and I roughed up the surface of the flywheel to knock off the any glazing (as per jafro vids). I drove HARD on this clutch and had some terrible launches that overheated the clutch no more than 5 times until I figure out how do it properly (learning still). I got around 16,000 km's (or 10,000 miles) on it before my 7-bolt let go and I pulled it to build my 6-bolt up.
Disclaimer: To me this clutch has a lot of heat spots on it and I know I overheated the shiiit out of it a few times so its in need of some love.
When I measured the clutch disc I found that it had taper to it and the ouside edge was worn down to just before where the ACT service limit was on it. B/c it was tapered I checked the flywheel and the PP for taper and both had a slight taper to it as well so I'm guessing that I should have resurfaced the flywheel flat the first go around.
1st question: should a PP have a taper to it all? This was a brand new ACT and its only had 1 street disc in it ever and the KM's seem to low to me to have a taper to it. Do PP have a taper on them when they are unloaded and out of the car? I would think it should be flat no? I am curious as the spring in it could be causing deflection in it when unloaded but I am not sure and am learning still.
2nd question: From the pics below (specifically the 2nd pic where I outlined in red) I found that the PP has worn semi evenly. In the outlined pic you can still see the original machining on it. What would cause the uneven weird wear and what can I do to fix it? When I installed it I made damn sure to clean the flywheel "step" surfaces off and also made sure there was nothing in between the PP mounting points and the flywheel. It was toruqed properly in sequence and I made sure to hand tighten all the bolts all around in sequence to marry the PP to flywheel in a parallel manner. I also was very easy on the clutch at the beginning and broke it in properly and then after about 2000 kms tried some launches. To me the PP should have worn evenly all over (even with the taper).
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This is where the eneven wear is....you can still see the original maching marks. Seems weird to me that I would go through a whole street clutch disc and there still see some machining marks in the PP.
You must be logged in to view this image or video.
You must be logged in to view this image or video.
You must be logged in to view this image or video.
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You must be logged in to view this image or video.
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Finger wear is very very minimal....it looks (is) near brand new looking still.
You must be logged in to view this image or video.
You must be logged in to view this image or video.
Lemme know what you think...any and all criticismm, ideas, and comments are welcome. Be harsh as I need to learn here and I do not want to burn out a another disc prematurely.