well.......
 

..........metal in the oil is never a good thing.

http://986forum.com/forums/uploads02...1466902524.jpg

In several of your posts you're asking very basic informational questions about IMS replacements that a novice would ask. In other posts you're crapping all over the people who developed the most successful IMS replacement on the market as if your an IMS expert. Can't be both - IMS novice and expert

It's interesting how volatile this subject has become. Most shops use the LN IMSB kit and have had great success. Not everyone can send their car to "Mr. Tennis elbow" (got that patting himself on his own back) Many of his "accomplishments" have come from another shop's idea's. For the longest time he touted Type IV engines as being the "only" engine. At the same time he wouldn't even say "Subaru" and now look at what he's doing, "building Subaru" engines and he says his are superior. Hell, FAT performance in Orange CA and Outfront Motorsports are premier builders, FAT for the Type IV and Type 1 and Outfront for the 4 and 6 cyl. Subaru engines. The bottom line is Jake is good but not the "legend in his own mind" that the thinks he is.
Now along with that said, I just had a LN IMSB installed on my car (double row) the car had 62,000 miles and the original double row was in good shape but I had it done just "because" It's expensive but no where near the cost of shipping a car to Georgia, paying Jakes labor and elevated parts prices. In another 6 or 7 years years when the clutch is toast, I'll have another LN IMSB kit installed and still be money ahead had I shipped my car to Raby.

Hi,

ISMB: it's a (big) business.

Another ball bearing vs. roller bearing aspect:
roller bearing: higher friction; higher inner temperature

That is why you won't find roller bearings for high rev applications.

Forces: shure there are all kinds of forces, because the IMS also transmits forces from one side to the other and it's not a static system because you accelerate and decelerate.:

http://www.pelicanparts.com/techarti...mall/pic06.jpg
http://www.thetruthaboutcars.com/wp-...ate_shaft3.jpg
http://www.einmaligparts.com/assets/...on/pg_0013.jpg

Regards, Markus

In all honesty I know nothing about the shaft, the one designed by Porsche anyway, and until today have avoided opening/reading "any" thread/forums debating on that subject. My Bearing is the best-in-the-world (20 years old now!).

However when I saw "roller" bearing as the title something told me that the IMSB business was obviously going out of control. Rollers bearings aren't necessarily a synonym of "performance" (e.g. think slow locomotive drive train applications). That's possibly why this particular thread caught my attention and raised curiosity.

You are correct Markus. You have more physics involved on rotating mass than one can imagine. Kinetic energy/velocity, momentum, gravity, floating design (or not), centrifugal force (although anything spinning <8000rpm doesn't really create a whole lot of that), dynamic energy e.g. during accel & decel of the balls/rollers. Did I forgot friction and thermal expansion?! Tolerances?!

You call this "dynamic" Markus. Personally (and my m.eng professor would agree) I call this an every engineers' nightmare ;)

Although, I could be wrong, that might possibly be what the MY96 needs long term. A good old tech, fat & heavy duty roller bearing. Who knows for sure

(like I said earlier, without the CAE data and engine room test results, it's all based on luck lolll)

Who said anything about being required to ship your car to Raby? This whole topic is about a guy who claims to be an expert on these engines asking about roller bearings and not wanting any opinions but the ones he wants to hear. He has ferrous metal in his engine and thinks that some other kind of bearing is going to make him better. Clearly not the expert he purports to be. As a side Story he seems to want to act as though the LN bearing is a scam while his engine continues to disintegrate.

I think Raby charges one heck of a premium. But, that's his business and he can do it. If you've got a guy that knows how to install the bearing and charges less, good for you, feel free to share his info if he's quality. The point there is he isn't going to be putting a roller bearing in your engine because he also knows the LN bearing the best and most used one out there in this application.

Now back to SilverSSS slinging insults while that metal continues tearing his car up.

jdraupp: 3rd post, first page

LEJ, clear on that. Sorry, wasn't sure who you were referring to. I'm with you. I like the ln products and if money was no object, I'd send my car to flat 6 for a Raby monster rebuild. You don't need to do that though. There's plenty of qualified installers. Thanks for clarifying.

Took car out today, engine still didn't blow up. Did i do something wrong?

yes - you are damaging the oil filter to a point where it will need changing prematurely. Prepare to loose all of that $30 soon.

Carnage stuff, barely can look

Yeah.. .. .

if you'd spend a day or two with our favorite indy here he'd show you chunks that came out from 911, gt3, 996, 987, and the list goes on (some ferrous and non-ferrous). He sees them every weeks![FALSE]. None of these cars had their ims swapped afterward. And they are still running strong today!

Whatever chunked in yours doesn't seem to affect the running of the car. Clearly. Up to you if you want to sponsor a local shop for cleaning then by all means - pay!. Most here at the SH club couldn't care less and wait until the engine blows up man - shall it really happen engines/replacement are easy to find.

Its just a car, and they do just that; blow up eventually. In a meantime drive the thing and have fun. Red line and all bud

My IMS Solution feeds just filtered oil from my Spin On Filter adaptor directly to the IMS Solution flange. This is the cleanest oil in the engine, as it has just passed through a filter less than 1" from the oil feed outlet.

Do NOT confuse my patented (US Patent 8,992,089 B2) IMS Solution with some other "oil feed" product. It shares nothing in common with those.

Pre- Qualification procedures originated here. Thats why of the IMS Retrofits that we have carried out under this roof (over 600 to date) not a single one has failed. Assuming that an engine is healthy, or retrofitting the IMSB on an engine that is known to have debris laden oil, makes zero sense. If you compare what we actually do, to those who just install an IMSB, then you'll see where the value is. I maintain a 6 month backlog on IMS Retrofits, so we must be doing something right.

That said, the RS Roller Bearing is NOT an LN Engineering product. It is offered by RND Engines directly to SSF Auto Parts, exclusively.

RE the roller bearing, again, very strange. Personally I've never realized how much hate there was for what appears to be a little shaft. Pretty inoffensive looking shaft if I may add.

Sure Philip Vaughan would agree, if he'd be alive of course. You get the point

OP (Chris) - not sure if this all answers your question. For me I've reached the 'whatever' zone already. Thank you very much and have an amazing day!

After the theoretical debates with their lack of quantification and test data are over - there has been some field experience reported with Roller Bearing IMSB's.
To my surprise it has been positive so far. Only a few reports so far and IIRC only 10,000 miles.
Of course that little data point should be balanced against the experience with deep-groove ball bearing IMSB and the famous plain bearing alternative.
Considering the amount of work+ collateral damage from any IMSB failure, I am surprised people take any risks.

censured: none of my business really.

(wish my boxster and everyone's long and healthy imsb life)

removed that as well, wt... way too bored obviously

If you buy a car and know of its weaknesses you'll always a person who takes risks. ;)

If you install an IMSB by pulling it out of an engine and press a new one in you always have a risk, especially if you don't know what you are doing there and on all these videos it looks so damn easy. And sometimes the IMS and crankshaft bearings fail just because of the two engine half casing tolerances.

So if you don't like risks… buy another car… ;)

Regards, Markus

Actually, it is "so damned easy" if you follow the directions and use the correct tools. With the release of the Faultless tooling, it became even easier.......