BAD.TAG

Jim - if inspection of the element is a key factor, you may want to consider a re-usable stainless steel mesh filter. LN offers one as do some others.

Price aside, it will allow thorough inspection without the hassle of cutting open a housing and should last the life of the car

Byprodriver

From lnengineering.com

The LN Engineering Spin-On Oil filter adapter also helps improve the longevity of your engine by providing full flow filtration, which means 100% of the oil gets filtered without having oil bypass the filter (as the factory filter housing allows for). Our design eliminates the factory bypass for the filter (engine still has a pressure relief in the oil pump to prevent over pressurization).

philooo

jsut keep in mind that it is rare for porsche to make design mistakes..if they designed it like that there must be a reason... one of which could be cost saving.. but who knows.

Barn996

Exactly, like the intermediate shaft design...

5CHN3LL

...or the intermediate shaft bearing redesign...or the intermediate shaft bearing re-redesign...

alpine003

All the marketing hype aside or for situations when you plan to take your car to your grave, there are no conclusive long term tests that have shown one is better vs the other. When I had my well maintained 250k mi BMW's, it had the same compression numbers or better of guys that had a 1/3 of those miles all on the stock filters.

I still admire over engineering to a degree but don't necessarily desire to have/use it on some of my personal things.

Flat6 Innovations

Considering that debris collects in the bottom of the factory oil filter housing and the fact that the factory oil bypass valve is also at the bottom of the filter housing, bypass oil is often debris laden.

High oil temperatures and time in service weaken the factory bypass and make it relieve earlier, which means that less oil is filtered and more is bypassed.

alpine003

Doom and Gloom as usual... Jake we need broken part pics to accompany...

Flat6 Innovations

What is doom and gloom about the description of the way the bypass works? Its a fact that the bypass is in the bottom of the filter housing and that debris collects there as it falls from suspension in the filter housing.

Anyway, be careful what you wish for. Just happened to have this one handy. Good enough for you? I can go more explicit, if you can handle it.

alpine003

Do you feel the factory oil filter system is inadequate for safe and reasonable operation up to say 125k miles for your avg owner?

Does all your engines you rebuild/build leave your shop with you spin on oil filter system along with the dt40 good stuff? Just curious...

Flat6 Innovations

Every engine we have ever reconstructed has utilized the LN SPOFA. No deviation, and its standard equipment.

All engines use our DT40 oil, or XP9 for the track. No other option is available and you won't find anything else here. Why develop these things if we aren't going to use them 100% of the time? We develop these things for our own use, and some of them trickle down to the rest of the market.

I feel if someone has 125K on their engine they should at least replace the OEM plastic filter housing to get rid of the tired factory bypass spring which is both tired and weak. When we carry out our preventive procedures most engines end up with a SPOFA or a new factory housing.

alpine003

What kind of "debris" are we talking about in an otherwise healthy engine with frequent OCI's? I personally don't see a cause for alarm for something like this but I do agree that for your engines, you def don't want to leave any weak points and make it 100% to keep your top notch rep intact.

Flat6 Innovations

Can't really answer that with a blanket statement. Any engine will create wear materials and those will always be a variable.

What I am concerned with is the control of collateral damages associated with failures that start simple, but quickly become engine wide after the engine oil is contaminated.

The majority of engines that can't be saved end up terminally ill due to wear and other issues associated with collateral damages stemming from material laden oil.

The primary failure is seldom what keeps the engine from being resurrected after failure. The secondary collateral damages are what open the wallet far and wide.

Imo000

How often does the bypass opens? Every time during a cold start, cold start in freezing teperatures, hot sarts when the filter housing is hot, etc?

Flat6 Innovations

That's dependent upon many variables and is never a constant. The biggest being the condition of the bypass unit. Oil viscosty, temperature and etc all impact it.

I have completed a study on this and devised a method of monitoring the operation of the bypass using a micro switch in the housing that utilizes a simple LED to indicate when oil is bypassing the filter.