Pedros Techno DOF IMS fix?

[Kirk]

Some food for thought, I'm not sure I would worry about the size/strength of the bearing in MY 06-08 cars. The 6305 bearing in those cars is a monster compared to the single row 6204 in MY 01-05 cars. Here are some comparative pictures I just took. In these pictures the 6305 is just a standard SKF steel bearing. The 6204 is a ceramic hybrid bearing but it's the same size as the OEM steel 6204 bearing.




The 6204 is actually smaller overall than the inside of the outer race of the 6305!



Kirk Bristol

[moresquirt]

Thx for the pic Kirk,Wow!! I have never seen the two bearings side by side,u are correct thats a monster in comparison.Does it also have a thicker wall? I would guess that the seals on the larger bearing are also thicker and therfore stronger which may also help in regards to oil penetration. With regards to the law suit strictly related to autos 01 thru 05 , i wonder if people with 06 thru 08 autos that in time start to have similiar IMS problems.
Will they have less problems making a claim with Porsche now that there has been a documented and proven problem.Based on how Porsche handled this issue of denial over the last 10 years or so,knowing full well that there was an legitimate concern or problem i don,t feel reallly comfortable in purchasing a DFI car with all new technology which may down the road prove to have problems that they will deny until people force them to act!
Raby has already shown pics off excessive cylinder wear on low milage units of DFI cars that werent tracked (probably heat related). Good luck.

[Jake Raby]

I'm not sure I would worry about the size/strength of the bearing in MY 06-08 cars. The 6305 bearing in those cars is a monster compared to the single row 6204 in MY 01-05 cars.

If lubrication really is the problem, then why would bearing size even matter?

[thom4782]

Originally Posted by Jake Raby

If lubrication really is the problem, then why would bearing size even matter?

Great question...

In theory the answer could be that it takes bit longer for friction to destroy a bigger bearing just like it takes a saw a few more strokes to cut through a few more millimeters of wood. In practice, it doesn't matter unless the actual failure mechanism is related to load bearing capacity.

[cnavarro]

Originally Posted by Jake Raby

If lubrication really is the problem, then why would bearing size even matter?

If lubrication really is the problem, bearing size wouldn't matter. But the failure figures of the dual row versus single row IMS bearing from the class action lawsuit tell a different story.

[Kirk]

Originally Posted by moresquirt

Thx for the pic Kirk,Wow!! I have never seen the two bearings side by side,u are correct thats a monster in comparison.Does it also have a thicker wall?

You can see in the picture that the 6305 bearing has thicker races. The width of the 6204 bearing is 14mm while the 6305 is 17mm wide (or what I believe you are calling thick). So yes, the 6305 bearing is bigger all around. It also has bigger balls...

Kirk Bristol

[Jake Raby]

Originally Posted by Kirk

You can see in the picture that the 6305 bearing has thicker races. The width of the 6204 bearing is 14mm while the 6305 is 17mm wide (or what I believe you are calling thick). So yes, the 6305 bearing is bigger all around. It also has bigger balls...

Kirk Bristol

Ok, lets remember this statement leading into the future when discussing the the problem with the M96 IMSB is only limited to lubrication.

If the problem was limited to lubrication, then Kirk's observation and most recent statements would not be relevant, but they are.

[Jamesp]

It would be nice if you said more Jake. There are folks with their engines not just split, but with every bolt removed, hanging on this conversation. Not that I'll say who though...

[JAAY]

I'm about to put in a dual row ceramic bearing. I don't know if I should just put it in with the front seal removed or with Pedro's dof. Any thoughts? My stock dual row didn't fail and still looks and feels great after I pulled it out.

[Kirk]

Originally Posted by JAAY

I'm about to put in a dual row ceramic bearing. I don't know if I should just put it in with the front seal removed or with Pedro's dof. Any thoughts? My stock dual row didn't fail and still looks and feels great after I pulled it out.

That's basically what I am doing - putting in a new bearing, removing the outside seal, and installing the DOF. This is on a 2003 Carrera 4S with single row bearing. I'm just not 100% sure yet if I'm going back in with a SKF steel bearing or a ceramic bearing. I have both in my hands, but my mind is not made up. Transmission came out of the car Sunday. The RMS and IMS are both leaking oil, the IMS is leaking worse. This next weekend I'll get the IMS bearing changed out and oil feed installed. I'll probably start a separate thread with photos about the install and my impressions of the DOF system. So far I really like what I see with it. I got a nice set of instructions with clear photos and details on the install. The quality of the parts seems really good too.

Kirk

[Jake Raby]

Originally Posted by Jamesp

It would be nice if you said more Jake. There are folks with their engines not just split, but with every bolt removed, hanging on this conversation. Not that I'll say who though...

The choice should be very clear to those people that there's only one way to truly solve the problem. I won't try to convince them, because once the development is done, I am done.. I don't sell the parts.

I am a little busy at the moment... Creating another DFI Beast. While other people have just started developing M96 components and entering the market we are on our fourth year of DFI engine development at the next level.

Yeah. They are a few years behind. They know it.

This one is spankin' new out of the crate, built in March of 2013. It's getting fed some Raby steroids.

[JAAY]

Can't wait to afford to buy a different make of sports car to put this entire discussion behind me.

[Jager]

Originally Posted by Jake Raby

I am a little busy at the moment... Creating another DFI Beast. While other people have just started developing M96 components and entering the market we are on our fourth year of DFI engine development at the next level.

Interesting lobes on that cam...