Cayman s 981 track mods for reliability
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Thread: Cayman s 981 track mods for reliability

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    Cayman s 981 track mods for reliability

    I’ve tracked and raced 986s so I know what you have to do for those engines/cars
    Deep sump/baffle/under drive pulley

    What’s needed for the 981 caymans?
    I’m considering picking up an S 6mt for drive to the track use, but primarily hard track use.

    Thx,

    Mike

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    Re: Cayman s 981 track mods for reliability

    The 9A1 engine in the 981 is superior to the M9x engine and needs less help. It scavenges oil from the heads to ensure the bearings never starve for oil.

    The major issue is too high oil temperatures. Add 3rd radiator and use good oil and then see what the oil temperatures are. LN engineering recently came out with a 9A1 oil sump for the purpose of increasing the oil capacity to control oil temperatures. Any additional sump will reduce ground clearance.

    Other things that will indirectly reduce oil temperatures are: GT4-style side air scoops will help keep the engine bay cooler. Coating and wrapping the exhaust helps, too. Run in Sport or Sport Plus mode as the coolant is regulated at a lower temperature (105C vs 90C). The car uses cooling water to oil heat exchangers on engine and transmission, so cooler water temps will decrease oil temperatures and dramatically shorten the time the oil temperatures are high once in cool down and off the track.

    After that, invest in better brakes, brake cooling, and suspension. Rear sway bar is usually the first mod to reduce understeer. Mods to increase negative camber front/rear are next. People use wider tires/rims with spacers to get more grip on the track.

    One key to making the engine last is to never go on track with a cold engine. Oil should be 160F, especially on a new engine, due to very narrow piston to (aluminum) cylinder wall clearance.

    V6
    Last edited by Voyager6; 06-30-2019 at 02:09 PM.

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    Re: Cayman s 981 track mods for reliability

    Good tips. Nice thread. Thanks!

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    Re: Cayman s 981 track mods for reliability

    Voyager, do you have the part number for the larger oil/water heat exchangers?
    Not sure if the one for the PDK is available..?

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    Re: Cayman s 981 track mods for reliability

    $2500+ for a deeper oil pan is pretty spendy?

    What 3rd radiator setup is being used? Similar to the old Boxster S center front?

    Is there a means to add a SETRAB type oil cooler with forced air with out jumping through hoops?

    Without PASM etc -- the 986's could just put on any coil-overs -- what systems are compatible (or is there even a compatibility issue?)

    I'm assuming when you say Brakes -- your referring to Pads -- most stock porsche calipers I've found to be more than adequate braking wise.

    assuming from camber choice is GT3LCAs, what's being used for rear?

    thx.

    Mike

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    Re: Cayman s 981 track mods for reliability

    There's an $850 sump extension from Mantis that I think would perform similar to the deeper billet sump. (adds 2.3 litres of capacity)
    2015 Cayman GTS
    2008 Audi RS4
    https://www.youtube.com/user/JCviggen1

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    Re: Cayman s 981 track mods for reliability

    Quote Originally Posted by Gilles View Post
    Voyager, do you have the part number for the larger oil/water heat exchangers?
    Not sure if the one for the PDK is available..?
    From 991 GT3 PET PDF, Illustration 104-10, engine oil to water heat exchanger

    MA 1.76 HX 9A1 107 450 91 (Assume this one is bigger since it needs longer screws)
    MA 1.75 HX 9A1 107 450 90

    6 screws
    M6x16 for ..90 -- 900 385 009 01
    and M6x20 for ..91 -- 900 385 019 01
    4 28mm x 3mm O-rings 999 707 547 40

    I have no knowledge if this fits a 981, so you are on your own.

    V6
    Last edited by Voyager6; 07-06-2019 at 01:56 PM.

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    Re: Cayman s 981 track mods for reliability

    Quote Originally Posted by Voyager6 View Post
    I have no knowledge if this fits a 981, so you are on your own.
    Doesn't look like it, sadly. Plumbing looks fundamentally different in terms of inlets and outlets. 4 holes on the engine side for the GT3, 2 for 981.

    The only one that might fit and might be bigger is from the 991 Turbo. It's a different part number at least and it's plumbed the same way but hard to say what the difference is or if the bolt pattern even matches.
    2015 Cayman GTS
    2008 Audi RS4
    https://www.youtube.com/user/JCviggen1

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