Aluminum Flywheel WTF?
4 Attachment(s)
Just received my long awaited high performance lightweight aluminum flywheel for my FD to be used with an ACT XT clutch. The flywheel utilizes a replaceable friction surface. When I handed it to my mechanic, he said WTF? How come this surface isn't machined? It is clearly a rough stock finish. The texture appears to have pores on the order of 5 to 10 mils deep.
I discussed this with the vendor (who shall remain nameless for the time being) who explained that all of their flywheels look like this. I said WTF? every flywheel I've ever seen has a machined surface. I expected this surface as delivered to be turned on a lathe or ground. My mechanic and I are concerned that this will eat the hell out of my clutch disk while causing overheating, hot spots, chattering, etc. The vendor said they've always made them this way and it is completely normal and not a problem. My mechanic purchased the same exact setup approximately four years ago. He noticed that his friction plate has 10 fasteners while mine has 16 fasteners. Apparently they have made changes over the years. My mechanic still has in hand the original friction plate from four years ago (since replaced) and this original plate appears to be machined has he rememered it was when he got it. About a year ago, he bought a new friction plate from the same vendor and remembers the same quality machined surface, unlike mine. What do you think? See attach photos of the replaceable friction surface from my flywheel. I have attempted to highlight the texture of the surface with side lighting. #1 overall plate, #2 close up of front surface, #3 front surface showing scale, #4 rear surface. https://www.rx7club.com/attachment.p...d=228331&stc=1 https://www.rx7club.com/attachment.p...d=228332&stc=1 https://www.rx7club.com/attachment.p...d=228333&stc=1 https://www.rx7club.com/attachment.p...d=228334&stc=1 |
is that replacement peice aluminum too? If not i would imagine it wouldnt be machined.
|
looks completely normal to me... its the fidanza flywheel right? i have a fidanza on my fd and it looked the same as the last one on my mx6. its just the way the replacement friction surface looks.
|
Originally Posted by Aeka GSR
is that replacement peice aluminum too? If not i would imagine it wouldnt be machined.
The odd thing is the way the vendor claims "we've always made them this way" and "we have probably thousands in service and they are all like this" whereas my mechanic's friction plate from one year ago seemed to be machined. The vendor seems to be either lying or intentionally misrepresenting what is going on. Maybe the vendor has made a change to reduce the cost based on a theory that the unmachined surface is FINE. OK. But why not say so? Why claim "we always made them this way" if in fact this is not true (since they used to be machined)? Most steel or chromemoly flywheels are cast or forged and then turned on a lathe, so of course the friction surface will be a flat machined surface, just like a brake rotor. The question I am posing to the Rx-7 community here is: should a replaceable steel friction surface on an aluminum flywheel also be machined? Or is it OK that is kind of rough? Will this extra roughness result in undue and premature wear and tear on the clutch disk? |
Originally Posted by mono4lamar
looks completely normal to me... its the fidanza flywheel right? i have a fidanza on my fd and it looked the same as the last one on my mx6. its just the way the replacement friction surface looks.
But this raises exactly the information I want to see: Is this how a Fidanza aluminum flywheel replaceable friction surface looks? Is this how a Racing Beat aluminum flywheel replaceable friciton surface looks? |
Looks to me like someone just decided to save on manufacturing costs.
|
This is normal for a replacement surface, it just needs to be mounted up and turned. The reason for this it to compensate for the variances of each flywheel. If they sent it to you pre machined it would not be true and you would not get the best mating surface for the clutch disk.
Hope this helps, Dan |
Originally Posted by Chadwick
This is normal for a replacement surface, it just needs to be mounted up and turned. The reason for this it to compensate for the variances of each flywheel. If they sent it to you pre machined it would not be true and you would not get the best mating surface for the clutch disk.
Hope this helps, Dan |
Originally Posted by tmiked
Looks to me like someone just decided to save on manufacturing costs.
|
Originally Posted by Chadwick
This is normal for a replacement surface, it just needs to be mounted up and turned. The reason for this it to compensate for the variances of each flywheel. If they sent it to you pre machined it would not be true and you would not get the best mating surface for the clutch disk.
Hope this helps, Dan THIS IS NOT A REPLACEMENT INSERT. THIS IS A BRAND NEW FLYWHEEL. IT CAME LIKE THIS. I removed the insert so I could inspect the back side and so I could show pictures without revealing the vendor. I wanted an unbiased opinion. I agree the new insert ought to be installed on the flywheel and THEN turned, right? That is what I am going to do. This vendor is claiming I ought to just throw it on there AS IS and let my new clutch wear away the stock rough surface. WTF? |
Originally Posted by rxcited2
Dan,
THIS IS NOT A REPLACEMENT INSERT. THIS IS A BRAND NEW FLYWHEEL. IT CAME LIKE THIS. I removed the insert so I could inspect the back side and so I could show pictures without revealing the vendor. I wanted an unbiased opinion. I agree the new insert ought to be installed on the flywheel and THEN turned, right? That is what I am going to do. This vendor is claiming I ought to just throw it on there AS IS and let my new clutch wear away the stock rough surface. WTF? |
My new SR Motorsports flywheel with the insert did NOT look like that, it was machined.
|
Originally Posted by rynberg
My new SR Motorsports flywheel with the insert did NOT look like that, it was machined.
|
mid 05
|
Originally Posted by Chadwick
This is normal for a replacement surface, it just needs to be mounted up and turned.
|
Agreed ^ it needs to be mounted and turned. But is it right that a new flywheel ought to come this way? Is it right that the vendor lied about changes to the way he ships his flywheels? Is it right that the vendor suggests to use it AS IS?
|
Originally Posted by rxcited2
NO. This is NOT a Fidanza flywheel.
But this raises exactly the information I want to see: Is this how a Fidanza aluminum flywheel replaceable friction surface looks? Is this how a Racing Beat aluminum flywheel replaceable friciton surface looks? nope. my racing beat insert was smooth not all pitted like that one... |
Originally Posted by rxcited2
Agreed ^ it needs to be mounted and turned. But is it right that a new flywheel ought to come this way? Is it right that the vendor lied about changes to the way he ships his flywheels? Is it right that the vendor suggests to use it AS IS?
|
Originally Posted by rxcited2
Dan,
THIS IS NOT A REPLACEMENT INSERT. THIS IS A BRAND NEW FLYWHEEL. IT CAME LIKE THIS. I removed the insert so I could inspect the back side and so I could show pictures without revealing the vendor. I wanted an unbiased opinion. I agree the new insert ought to be installed on the flywheel and THEN turned, right? That is what I am going to do. This vendor is claiming I ought to just throw it on there AS IS and let my new clutch wear away the stock rough surface. WTF? |
Originally Posted by rxcited2
This vendor is claiming I ought to just throw it on there AS IS and let my new clutch wear away the stock rough surface. WTF?
|
HMM good info......
|
WOW..... cant wait until more information is revealed!!! both my origional SR flywheel that i bought in 02 and the replacement friction plate i bought from SR in 06 were BOTH machined....
while on this topic, my SR flywheel has the lesser ammount of rivits and you say you have the more ammount of rivits, and my question is if you can use the RB replacement friction plate with the more modern SR flywheels because the replacement plate from SR is $150 and is only $75 from RB....... |
When I got my replacement friction surface from racing beat it definitely did not look like that. It was machined on both sides.
|
5 Attachment(s)
The surface finish of that replacement disc doesn't look right.
Pics of the Racing Beat Flywheel I installed last October: |
That flywheeel doesn't look right. I would send it back. So who made it?
|
I'm giving the vendor a chance to review these comments and dicuss it with me.
|
James...
SR Motorsports flywheel... http://srmotorsports.com/RX_Flywheel.jpg its obviously advertised as machined. the image above clearly has a machined friction surface. |
Originally Posted by 1.3 liter V8 eater
James...
SR Motorsports flywheel... http://srmotorsports.com/RX_Flywheel.jpg its obviously advertised as machined. the image above clearly has a machined friction surface. |
My SR didn't come pitted like that. Give the guy a chance to make it right. If he doesn't, smear his name so none of us buy from him.
|
No Smearing Required
I spoke at length with the vendor. He explained to me the evolution of the flywheel manufacturing details over the years. There is still some difference of opinion about the suitability of the surface on the as shipped plate. He offered to take the whole thing back, no questions or to ship me a new contact plate that is not pitted like the depicted one. I chose the later and agreed not to smear his good name!
Since I started this thread, I have received numerous opinions including several from respectable and knowledgable sources that suggest that as long as the plate is flat, the texture shown makes no difference. I was told of an "experiment" in which an unmachined plate like mine was installed, broken in, and driven for 100 miles. When pulled apart, the contact plate "looked machined." I guess clutch disks are pretty abrasive and bedding in the contact surface is part of the break-in process. So a rough (but flat) surface actually helps with this process. The bottom line for other would-be aluminum flywheel purchasers, is that if a machined or smoother surface on the contact plate is important to you (based on you and your mechanic's opinions or personal preference), discuss it with your vendor prior to ordering. The vendor can choose an appropriate contact surface to send with your flywheel, or advise you to shop elsewhere! |
Originally Posted by rxcited2
I was told of an "experiment" in which an unmachined plate like mine was installed, broken in, and driven for 100 miles. When pulled apart, the contact plate "looked machined." I guess clutch disks are pretty abrasive and bedding in the contact surface is part of the break-in process. So a rough (but flat) surface actually helps with this process.
The break-in is in respect to the clutch disc, not the firction surfaces. The disc, as do new brake pads, needs some time to lose it's high spots so that it can make full contact with the flywheel and pressure plate. |
Followup: Is an un-machined friction surface OK?
3 Attachment(s)
OK. I had previously decided to cut the vendor Ray "Greg" Lochhead of SR Motorsports some slack. Why? Because he made some barely passable excuses, rebated some money on an unrelated issue, and agreed to furnish me with a new smoother friction surface. He did furnish another plate (to his credit), but it was essentially the same as the original - an un-machined hot-rolled surface that he attempted to polish slightly and ineffectively with an orbital sander. gRayG lied to me and said "we've always made them this way [with an un-machined friction surface]." Clearly this was a lie because I have multiple reports from other SR Motorsports aluminum flywheel owners who bought them a few years ago and the friction surface was NOT un-machined like they are now. It seems that gRayG has made a choice to save manufacturing costs without passing on any savings to the customer and lying about it. I decided at the time that I would go ahead and try the rough plate and "test" the theory that an un-machined surface is fine.
Now it is 3500 miles later and my tranny was going out - it was partially already going out and made worse by increased HP! I got a used JDM tranny, some diff bushings, trailing arms and toe links, and while it was all apart, also pulled the clutch. See attached photos below. Needless to say I was very disappointed in the results. I had the spare friction surface machined and replaced that and the clutch disc while I had the chance. Based on the line of baloney from gRayG (my nickname for Ray who also calls himself Greg now), and many other shady things he said, did and lied about, I have to tell you all that this guy is not to be trusted. I don't really care if I burn this bridge with him because I will never EVER buy anything from Ray "Greg" Lochhead" at SR Motorsports again, EVER! In summary, my advice is: 1) DO NOT ACCEPT AN UN-MACHINED FRICTION SURFACE FROM ANY VENDOR. 2) DO NOT TRUST RAY "GREG" LOCHHEAD FARTHER THAN YOU CAN THROW HIM. 3) DO NOT BUY FROM SR MOTORSPORTS. These are my opinions and I stand by them. Make up your own opinions with respect to the SR Motorsports Aluminum flywheel and gRayG's lies, examine the photos below...
|
All of that damage after just 3500 miles?? Its totally pitted. That is total BS, I remember when we were at Jeremy's shop, you were talking to him about the flywheel and he said all of them came like that. What a liar, I will never buy from them again...
|
So I guess gRayG ***khead no longer makes any good parts, I wouldn't trust the pulleys after this either! Hopefully he gets what's coming to him, and soon! I believe my flywheel is one of the machined ones but we'll see next time it comes out, I currently have 8k on it.
|
jeez, nothing but horror stories from Ray and Sr Motorsports.
|
Damn, that thing looks like shit... replace a clutch every 7000 miles?
|
More interesting reading about what a scumbag Ray Lochhead of SR Motorsports/Shane Racing is:
https://www.rx7club.com/questions-about-members-102/thinking-about-ordering-sr-motorsports-shane-racing-ray-lochhead-read-1st-628636/ |
Read:
Originally Posted by GregFD3S
(Post 7235595)
All of that damage after just 3500 miles?? Its totally pitted. That is total BS, I remember when we were at Jeremy's shop, you were talking to him about the flywheel and he said all of them came like that. What a liar, I will never buy from them again...
ALSO PLEASE READ THIS THREAD: http://forums.rotarytuner.com/showth...newpost&t=7018 it is a thread i made with all my research about SR and my findings, it also includes links to ANY other thread on this fourm where SR is mentioned negatively. good reading |
All times are GMT -5. The time now is 02:26 PM. |
© 2024 MH Sub I, LLC dba Internet Brands