09-19-2013, 04:54 PM
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#41
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Registered User
Join Date: Aug 2013
Location: Fargo
Posts: 71
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Quote:
Originally Posted by Jake Raby
No. Doing so would only lead to drama, which is what occurs here on the forums.
My book covers this extensively, will be released at the 2014 Porsche Parade.
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Why make us wait to buy a book from you in 2014 as we are all needing help and advice for this problem right now. Surely you are well aware 2014 may be too late for us. Why don't you fill us in in as this is a forum thats here for help when needed
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09-20-2013, 04:51 AM
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#43
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Registered User
Join Date: Jul 2013
Location: Oslo, Norway
Posts: 325
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Quote:
Originally Posted by Perfectlap
I had to add the intervals in miles to see it better. Were these Mobil1 oils? It looks like you're missing records for at least 8 oil changes in the first 88K miles/142KMs to get the average mileage between oil changes down to 5K miles.
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Yes Mobil1. And yes I agree. I just bought it in july so it's not much I can do about the past.
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09-20-2013, 05:03 AM
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#44
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Registered User
Join Date: Apr 2012
Location: Ontario, Canada
Posts: 598
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Polk, I can understand why Jake would not want to get into an online debate as to which technology is better. It would be unseemly and ultimately, unproductive. He has been and continues to be a tremendous contributor to this site - no doubt taking time away from work at his shop that would be much more profitable. Secondly, many of us are looking forward to the release of his book - and again, we can hardly expect him to have spent so much time and effort preparing a limited-market publication without some expectation of compensation. Do you really expect that he should give it and its contents away? If you had been a member of this site for monthis, let alone years, you would no doubt appreciate how generous Jake has been in answering the questions of various members - giving up some of his substantial expertise for free.
Brad
Last edited by southernstar; 09-20-2013 at 05:03 AM.
Reason: sp
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09-20-2013, 02:14 PM
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#45
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Registered User
Join Date: Aug 2013
Location: Fargo
Posts: 71
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Quote:
Originally Posted by southernstar
Polk, I can understand why Jake would not want to get into an online debate as to which technology is better. It would be unseemly and ultimately, unproductive. He has been and continues to be a tremendous contributor to this site - no doubt taking time away from work at his shop that would be much more profitable. Secondly, many of us are looking forward to the release of his book - and again, we can hardly expect him to have spent so much time and effort preparing a limited-market publication without some expectation of compensation. Do you really expect that he should give it and its contents away? If you had been a member of this site for monthis, let alone years, you would no doubt appreciate how generous Jake has been in answering the questions of various members - giving up some of his substantial expertise for free.
Brad
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I just want to know if this new solution is better than his? Or explain why oil is not just flying out of his bearings he sells like a food blender in perdo's video. Forgive me but I am a new observer and having to decide what to stick in my new car.
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09-20-2013, 02:25 PM
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#46
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Registered User
Join Date: Nov 2012
Location: Southern, CA
Posts: 460
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Quote:
Originally Posted by polkfarmboy
I just want to know if this new solution is better than his? Or explain why oil is not just flying out of his bearings he sells like a food blender in pedro's video.
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Now that response is just way over the line. If you expect Jake and Pedro to get in to a *issing match over the subject I'd say you are sadly mistaken. This is one of those moments where you should step up to the plate, do your own research, make your own choices, and live with them.
Quote:
Originally Posted by polkfarmboy
Forgive me but I am a new observer and having to decide what to stick in my new car.
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This is a straight line I expect you'll get enough comments on what to stick in your car that I'm not going to touch it.
__________________
1999 Boxster Zenith Blue Metallic/Savanna Beige
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09-20-2013, 03:10 PM
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#47
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Registered User
Join Date: Dec 2009
Location: Texas
Posts: 244
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It's a free country, man. If he chooses to not to share, we shouldn't ridicule him. However, if there is a negative effect for his action or lack of his action, his reputation is at stake.
Quote:
Originally Posted by polkfarmboy
Why make us wait to buy a book from you in 2014 as we are all needing help and advice for this problem right now. Surely you are well aware 2014 may be too late for us. Why don't you fill us in in as this is a forum thats here for help when needed
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09-20-2013, 03:36 PM
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#48
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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Quote:
Originally Posted by haz
Yes Mobil1. And yes I agree. I just bought it in july so it's not much I can do about the past.
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send a sample to these guys. Maybe they an give you some clarity on what's going on in there.
Blackstone Labs
__________________
GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
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09-20-2013, 05:30 PM
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#49
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Need For Speed
Join Date: Feb 2013
Location: Funville
Posts: 2,112
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Quote:
Originally Posted by southernstar
Polk, I can understand why Jake would not want to get into an online debate as to which technology is better. It would be unseemly and ultimately, unproductive. He has been and continues to be a tremendous contributor to this site - no doubt taking time away from work at his shop that would be much more profitable. Secondly, many of us are looking forward to the release of his book - and again, we can hardly expect him to have spent so much time and effort preparing a limited-market publication without some expectation of compensation. Do you really expect that he should give it and its contents away? If you had been a member of this site for monthis, let alone years, you would no doubt appreciate how generous Jake has been in answering the questions of various members - giving up some of his substantial expertise for free.
Brad
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It's my understanding that the DOF complimented the LNE Retrofit, matter of fact I thought the LNE Retrofit came with the DOF until yesterday.
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09-21-2013, 07:46 AM
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#50
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Registered User
Join Date: Sep 2013
Location: California
Posts: 25
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Quote:
Originally Posted by KRAM36
I thought the LNE Rretrofit included the DOF?
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Relative to the LNE and DOF, how did Porsche correct the issue in the new (post 2009) engines?
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09-23-2013, 04:11 AM
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#51
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Registered User
Join Date: Apr 2012
Location: Ontario, Canada
Posts: 598
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In the latest engines, Porsche eliminated the IMS - no IMS, no IMS bearing to worry about.
Brad
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09-23-2013, 06:09 AM
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#52
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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Quote:
Originally Posted by southernstar
In the latest engines, Porsche eliminated the IMS - no IMS, no IMS bearing to worry about.
Brad
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Yeah. Lets see how that works out. We've been inside the 09 and later engines for over 3.5 years now.
A Porsche overhead cam engine has utilized an "IMS (aka layshaft) since the mid 1950s, beginning with the 547/1 and that was done for a reason.
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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09-23-2013, 08:38 AM
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#53
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Registered User
Join Date: Nov 2005
Location: Florida
Posts: 529
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Quote:
Originally Posted by KRAM36
It's my understanding that the DOF complimented the LNE Retrofit, matter of fact I thought the LNE Retrofit came with the DOF until yesterday.
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The DOF is indeed a compliment to the IMS bearing (any bearing).
You can install a DOF on your existing LNE ceramic bearing, or you can opt to purchase an IMS Kit (steel-ball or ceramic-ball) if you want to replace the OEM bearing when you install the DOF.
Again, none of the bearings on the market are the issue. They're all fine and can handle the task.
The reason why the fail is because of improper lubrication which is what the DOF addresses.
Happy Boxstering,
Pedro
__________________
Racecar spelled backwards is: Racecar!
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09-23-2013, 08:59 AM
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#54
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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I'm just tossing this question out there for anyone, but is the IMS the only part in the m96 that is prone to oil starvation?
__________________
GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
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09-23-2013, 09:14 AM
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#55
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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Quote:
Originally Posted by Jake Raby
Yeah. Lets see how that works out. We've been inside the 09 and later engines for over 3.5 years now.
A Porsche overhead cam engine has utilized an "IMS (aka layshaft) since the mid 1950s, beginning with the 547/1 and that was done for a reason.
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How is the bearing-free IMS Solution different from the bearing-free redesign in the 9A1 "solution"?
__________________
GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
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09-23-2013, 09:28 AM
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#56
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Registered User
Join Date: Dec 2009
Location: Texas
Posts: 244
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Jake,
Yupper! Only time will tell w/ the IMS-less. However, simplicity in engineering is always the best ingredient for a successful product.
Southernstar is correct with his statement; there's no argument about that. If I understand your implication/statement correctly, then no body is questioning the decision that porsche made to use the IMS b/t the crank and cams but many people are questioning the use of the roller bearing on the IMS. When a highly sought after company changes the design of their engine drastically, deleting IMS, their confidence in previous engine design is questionable. I'm not saying it's a problem, but it's extremely questionable.
Prior to 1996 when the Boxster came out, what type of bearings did they use for the IMS?
Quote:
Originally Posted by Jake Raby
Yeah. Lets see how that works out. We've been inside the 09 and later engines for over 3.5 years now.
A Porsche overhead cam engine has utilized an "IMS (aka layshaft) since the mid 1950s, beginning with the 547/1 and that was done for a reason.
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Last edited by Trey T; 09-23-2013 at 09:31 AM.
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09-23-2013, 11:45 AM
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#57
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Registered User
Join Date: Sep 2010
Location: Foster City CA
Posts: 1,099
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Oil starvation does not explain why the IMS failure rate of a sealed single row IMS bearing is 7 percentage points higher than its dual row counterpart rate of nearly 1%. The more likely reason is that single row bearings are weaker than dual row ones and, as such, they cannot carry IMS dynamic and thrust loads as well. This reason also explains why IMS bearings last longer in cars that run at higher RPMs - the drive it like you stole it ones. BTW: replacing the OEM bearing with a ceramic one fixes the loading problem.
Oil starvation also does not explain the roughly 1% failure rate common to all sealed IMS bearings. The most likely reason all IMS bearings suffer this baseline failure rate is leaking seals compromise lubrication by allowing oil to mix with grease. The resulting mixture provides much less lubrication to ball bearing and race surfaces than grease alone or oil alone. This reason also explains why IMS bearings last longer in cars that lessen the chance of seal degradation by changing oil often. BTW: installing an unsealed bearing or removing the seal on a currently installed bearings cures the compromised oil problem.
Oil starvation may explain potentially different failure rates in unsealed IMS bearing cars that use different methods of delivering oil to bearing assemblies. But first, it’s important to know if the failure rates of the two methods are actually different. The answer will come only when many unsealed IMS bearing cars with different of maintenance and driving histories amass a reasonably high number of service miles - say at least 50,000 on average. Until then, people must rely on seller opinions and the track records of their products. Both sellers claim their products are great. The LN Retrofit has a track record of almost no failures over several years. DOF is just beginning to build its track record.
So grab a few drinks and some popcorn and sit back and watch the debate as it unfolds over the next few years. Eventually, real world experiences will settle the relative failure rate question among the competing lubrication methods for unsealed IMS bearings.
Last edited by thom4782; 09-23-2013 at 11:47 AM.
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09-23-2013, 12:08 PM
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#58
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Mobile Porsche Surgeon
Join Date: Mar 2012
Location: Plano Texas
Posts: 239
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Quote:
Originally Posted by Trey T
Prior to 1996 when the Boxster came out, what type of bearings did they use for the IMS?
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On air cooled 911 it is a lapped bearing with an insert to support the rear journal.
__________________
Mike's Specialty Porsche Service
Mobile Mechanic Specializing in Porsche and Select Automobiles
http://www.mikesspecialtyautomotiveservice.com/index.html
Early 1996 / 97 Boxster, 130 k, De snorkeled, IMS, Top Speed Headers.
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09-23-2013, 02:23 PM
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#59
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Registered User
Join Date: Dec 2009
Location: Texas
Posts: 244
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From what I've read and analyzed in the last several years, nobody understand why there's a problem with the IMS bearing. I mean, no body!
There are many speculations but nobody can prove why it happened!!!! I have not seen any scientific test done to it, not even close!!!!
Quote:
Originally Posted by Perfectlap
I'm just tossing this question out there for anyone, but is the IMS the only part in the m96 that is prone to oil starvation?
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09-23-2013, 02:37 PM
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#60
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Registered User
Join Date: Dec 2009
Location: Texas
Posts: 244
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Do you know why they change it to roller bearing? is it because of assembly issue?
Quote:
Originally Posted by kashmir
On air cooled 911 it is a lapped bearing with an insert to support the rear journal.
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