dsbl

The obdII readout matches my hvac/dash readout for coolant temp, unforch you can't get oil temp with your standard bluetooth reader/smartphone app (at least on my 996.1, anyone try on a .2?). If your dash/obdII readout don't match it means your sensor is on the way out, the single coolant sensor actually has two sensors internally, one for the dash and one for the DME.

Metty

What’s the brand and where did you purchase? I’m thinking I need to get one.

hbdunn

I have this one and it works, but to be clear this will not provide oil temperature.

GC996

For oil temp check out "Progress On Digital Temp Guage" thread. Looks promising. A few other projects are going on as well.

Sam-Son

dupe

Sam-Son

Got it.
Thanks

What's the verdict on a third radiator? Worth it and effective at reducing temps?

5CHN3LL

The MKII 996 does not have the HVAC hacks. If you have a glove box and cup holders, you don't get the cool HVAC stuff. Fair is fair.

GC996

After watching Jason's temps this season and the difference between his oil and water temps, my conclusion is we need an oil cooler not an extra radiator. Always knew the oil temps would escalate on the track and ultimately pull up water temps over a 30 min session, but never had the analytics to confirm. Now we do.

Mike Murphy

I bought this several years ago: TONWON Car OBD2 Code Readers, OBDII Bluetooth Scan Tool Car Diagnostic Tool Vehicle Scanner for iOS and Andiord https://a.co/d/7urAUT2

Tr4ckD4ys

Doesn’t CSF sell a center mounted oil cooler for the 996?

GC996

Not that I am aware of, unless they just released one in the last few months. Please let us know if CSF has one that was released.

Believe it or not, there has never been an oil cooling kit for the 996 that has been made available to the public for general sale. It's the last of the solutions that are needed for the 996.

LN released a kit last year for the Boxter/Cayman that will work on the 996, but it only fits in the muffler area of the 996, meaning that we have to either run a muffler delete or a center exhaust system. Unfortunately, there is very little space in the engine compartment which is why we have never seen an oil cooling kit for the 996.

However, LN has been working on one that will fit somewhere on the car other than the muffler area. No doubt in my mind they will figure it out.

But as I said, it's the last of the solutions needed on the 996. Every other issue (IMSB, UAOS, UIDS) for the m96 has been successfully addressed.

In the meantime, what all of us have done historically is run a 2 quart deep sump, of which the extra oil helps with cooling over a 20-25 min time period on the track. After that, oil temps starts to rise quickly and swamp the water cooling ability of the car. You can contain this by making sure that you keep your session under 20-25 min by exiting the track early if its a 30 min session.

The invention of the UAOS Track version allows you to run an extra 1 quart of oil in addition to the extra 2 quarts of oil from a deep sump for a total of 3 quarts which further helps with oil temp control over a 20-25 min session.

But as you can see from Jason's track footage this season, which he is using a 2 qt deep sump and the UAOS track version, he is experiencing a significant rise in oil temps while his water temps are significantly lower. This is different from last year and may be explained by running his rev range higher and longer to compensate for the extra drag from the aero and meatier tires, but I am not an engineer. Regardless, his oil temps are higher this year. From an uneducated non-engineers point of view, this tells me that given a choice of a third radiator or adding an oil cooler, it would make more sense to add an oil cooler if one was available.

Lastly, the rise in oil temps is not something that is typically an issue for street folks. It is an issue for folks that track their cars, and have moved to the faster ranks which get the most out of their powerband at higher revs. Novice and intermediate level drivers most likely won't be as effected by this because they generally aren't on the gas and therefore revs for as long as an advanced driver.

Long winded answer, but we need to add context to the issue and solutions.

Sam-Son

Appreciate that insight. CSF sells a center radiator but not an oil cooler from what I've seen. I would think lower coolant temps=lower oil temps. My car will run right to the end of the '0' after agressive canyon driving. I can only imagine what the oil is doing.

GC996

Yeah, I doubt you will have any problems with cooling in your car on the street/canyons as long as your water cooling system as well as oem oil cooler is in good functioning shape. Sure you can get a third radiator or replace your side radiators with csf radiators which are supposedly 20% more productive. This may be helpful if you live in a hot climate town as a just in case. Our cooling systems are actually very robust for every day driving and moderate tracking. But if you are going to track it, at the bare minimum, add a low temp thermostadt, get the UAOS track version to run an extra 1 quart of oil as well as 2 qt deep sump for 3 quarts of extra oil in total for cooling and starvation.

Believe me, when an oil cooling kit is made available, I will be the first one telling everyone about it and will finish my final engine refresh project of adding the oil cooler and UIDS and will be back out on the track.

While i don't know for certain until its tested, i doubt a 3rd radiator will be needed once the oil cooling kit is released. Which is why i have held off on getting a center radiator.

Good luck with it.

Sam-Son

I live in NYC so while that normally doesn't seem like a hot climate when it isn't below zero its 95f with 95% humidity. Lots of stop and go traffic and the car does not seem to care for it. Already have a low temp tstat, clean radiators, new aux fan and relay. The system seems to be working as intended except that even with the low temp tstat the car still runs right to the end of the '0' and the oil pressure dips. I want to keep the M96 as healthy as possible hence my desire to reduce coolant/oil temps. Third rad seems like a good idea for additional cooling capacity for my sprited driving and traffic duties. UAOS with the auto drain is on my list

damage98MO

@Sam-Son the low temp thermostat has no effect on your ultimate water / engine / oil temp. It simply opens and starts the cooling system working at 'a lower temp', hence the moniker. I think for you in NYC traffic, if you can afford it, that 3rd rad would be helpful. I would hate sitting in traffic in a Porsche w 6MT. You should get a self-driving electric toaster for that part of your day . There are more of those made every day, and the prices keep dropping. Or, were, until pandemic and war etc. etc.