You’re certainly entitled to your opinion on what you think I should do. The thing is, I don’t really care much for your opinion on matters of what I should or should not do.

Good luck with your cooler should you decide to move forward with it 👍

 

Glad to see we are having a conversation on the final piece of the puzzle for our M96, which is oil cooling. Possibly the solution is the 997S cooler? Possibly it's the LN Cayman cooler. Maybe it's something else. Dunno.

But to keep the conversation going, here is a link, picture and a "copy and paste" description from LN Engineering's website on their larger Cayman cooler which is an oversized Cayenne Turbo oil to water heat exchanger. As mentioned, it will not fit in the 996 engine bay. It will have to go in the place of a muffler. LN does not yet have the 996 pluming parts for the cooler. Not an optimal set-up for a dual duty street and track guy due to having to rework the exhaust. But it will be a solution for a track guy once the pluming parts are manufactured.

https://lnengineering.com/bilt-racin...il-cooler.html



"Porsche Boxster and Cayman models with the M96/M97 engine uses an oil to water heat exchanger mounted on the top of the engine, using coolant to control engine oil temperature. The factory Porsche engine oil cooler is undersized and does not provide adequate thermal transfer when used for spirited driving, track duty, or in hot climates, resulting in elevated oil temperatures and reduced component life. Unfortunately, due to the location of the factory oil cooler, a larger cooler can not be retrofitted into place. To allow installation of a larger oil cooler, we have developed a kit that remotely mounts the cooler utilizing an oversized Porsche Cayenne Turbo oil to water heat exchanger made exclusively for LN Engineering.

The BRS Cayman/Boxster 987.1 6-Speed Engine Oil Cooler replaces the existing engine oil cooler and uses an adapter plate that plumbs both engine oil and coolant/water to our remotely mounted 0.5 L capacity heat exchanger. The cooler is mounted to the transmission with supplied bracket, hardware, Aeroquip hose, and fittings. Maintaining a lower operating temperature will improve both the performance and longevity of your Porsche Cayman or Boxster engine.

Please note: this kit is only compatible with 2005-2008 987.1 Porsche Boxster and Cayman models with the six (6) speed manual transmission; installation of low temperature thermostat and center radiator recommended."

Better Picture


Picture in Cayman

 

 

Glenn - once the exchanger is going in a non factory location requiring plumbing, I do not see the benefit to going with a stock style replacement when quality units are available from the aftermarket.

I don’t know why LN would choose to go that route instead of building a kit around something like a PWR unless it was for some type of class compliance requirement. Would be interesting to know why they chose to go that route. Thinking about it, maybe cost.

 

Over abundance of caymans on the track. Cooler fits them well in the engine bay. But not the 996. So look at it as not being built for the 996 but trying to figure out where to fit it. But, there may be another answer entirely. Maybe its the 997S cooler or something else. We all know there are plenty of coolers available. Problem has always been where to fit them. Which is why there isnt a plug and play solution yet. Someone who understands cooling and the 996 will ultimately find a simple solution that doesn't sacrifice mufflers.

 

So what are we thinking about the 997S cooler? Will it work or cause too many issues?

 

I can't imagine the 7S cooler having the slightest effect on the cooling circuit. Those stacked plate coolers tend to be less restrictive the larger they get. Adding plates actually increases the overall flow rate because of a larger total flow area. It seems counterintuitive, it's true though. I can't comment on any increase in oil cooling capacity. I would expect that to be proportional to the size change.

I believe the Cayman already uses the 997S oil cooler, no? So LNE/BR may have decided that the 997S cooler is not enough of an increase.

The Cayenne oil cooler is relatively huge in comparison. I have a few of them here if anyone wants actual dimensions. Another tidbit, the very early 2004 Cayenne Turbo's had an even larger oil cooler which Porsche must have decided was not needed as it's been superceeded to the same oil cooler as the non-turbo V8. Also the Cayenne radiator is huge so water cooling is not an issue.

 

Thanks Prf. Good feedback.

To the forum, assuming you have 3 radiators and oem oil cooler, how do you get more cooling in a M96 powered 996 with limited space.

Questions to ponder.

1. Do CSF radiators actually improve cooling 20%.
2. Would the 997S cooler provide 5-10% more cooling?
3. Assuming you can find a place for the big Cayenne cooler, would it improve cooling by 20%?
4. and lastly, what does 10-20% cooling improvement actually mean? If max temps are 275, and you have improved cooling by 10%, does that mean your max temps are now ~250?

 

I've used the 997S cooler on my M96 powered boxster. A, it fits fine with the intake oriented in boxster format. Shouldn't really be any different on 996. B), I have noticed a slight, but not particularly meaningful reduction in oil temps. C. The best effect on temps has been installing the 3 CSF radiators. My old stock radiators may not have been working as efficiently as a new set of stock parts, but the CSFs definitely brought coolant temps down about 15 degrees, which obviously helped oil temps as well

 

Turbo rads r bigger and cool more but u would need to swap bumpers too. Although i have seen the areo bumper work with turbo rads its not a clean install.

 

PET shows a different part number 987-107-025-02 for the Cayman.

 

Heights for the different coolers

987 73mm
996 108mm
997s 123mm

The plate for all of them is 82mm x 163mm I believe.

 

No, probably about 2% compared to new, unclogged stock rads. They *might* be more durable though. Compared to 20 year old stock rads clogged with bugs and pebbles, perhaps 20% - which you would get with new stock rads.

 

BTW, CSF has 2 different radiators for the 996 C2/C4.
3564 is a 1-row and 7044 is a 2-row.
I thought I'd found the deal of the year in December until I realized I was not comparing apples to apples.
7057 is the center radiator.

I plan on upgrading my radiators to CSF later this year or maybe next year.
I already have the brand new CSF condensers.
Air flows through the condensors before it gets to the radiators so I might as well replace them as well for improved cooling.

 

@hbdunn thanks for this info! Do these dimensions include the hive barb for the coolant line?