Exhaust/engine cooling mods
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Thread: Exhaust/engine cooling mods

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    Exhaust/engine cooling mods

    My first DE in this car was this past weekend at VIR (not my first DE, just in this car). It felt pretty good overall, standard 981S suspension is too soft and the alignment could use more camber front (1.1 and 1.3 now). The car was a bit understeer-oriented but not too bad. The esses felt a little unsettled, but part of that is just due to my last 2 track rides being a formula mazda and E92 M3 on stiff track coilovers and slicks...

    I had an ignition coil go out, and the transmission locked me out of all gears except #2 (PDK). It was stupid hot at VIR, 90-95 ambient temp, but the oil never got over about 265-270, which is okay with me for brief stints at frequent replacement intervals. Does anyone know if the coil could have cause the trans lockout? I swapped to a new coil and the car ran great the next day.

    Given how close the coils are to the headers and cats, it seems like it would be a good idea to protect them from heat more and keep more heat in the exhaust. Anyone wrapped the headers and connecting pipes or prepared a shield for the coils?

    I'm going to Barber August 5 with Rezoom, so we'll see how it fares then too. You guys should come out if that's in your area, it is a very fun track.

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    Re: Exhaust/engine cooling mods

    More front camber should help with the understeer. Get GT3 low control arms and increase your camber above -2.
    I am running -2.5 front and -2 on the back.

    I believe I had a DCT gear lockout on my M3 with a coil failure on track once ( car in safety mode). Haven't heard of that happening with
    a porsche, but there have been some coil failures with caymans. Might have been a bad batch as they occurred about the
    same time on several cars. Haven't heard much lately. My car ( 2015 GTS) has had 65+ track days without a problem ( shouldn't have written that).

    A couple of people wrapped their exhaust which lowered temps, but leaks occurred in the pipes, so maybe not a good answer. A shield could help.
    I would just see if it happens again if you replaced the coil.

    For oil temps, you can get a 3rd center front radiator (OEM) to decrease temps.
    Last edited by arter; 07-17-2017 at 11:36 PM.
    2015 Cayman GTS sapphire blue, PDK, PASM, GT3 LCA's - 7-18-2014 build
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    Re: Exhaust/engine cooling mods

    Cool, yeah I plan on camber going up to -2.2 or -2.3 (afraid to do much more for street wear). Is there any way to get the idiot coolant gauge to actually work? OBD reader showed 220 degrees while the car showed 194

    Good to hear your car has held up well with that many, that's the ultimate goal!

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    Re: Exhaust/engine cooling mods

    water gauge has a deadband in it, but will start to read true again if you get above 221 or so ( oil has to be above 275 to get there).
    Most of us just use the oil temp as the indicator of engine temp.
    2015 Cayman GTS sapphire blue, PDK, PASM, GT3 LCA's - 7-18-2014 build
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    Re: Exhaust/engine cooling mods

    Cool, thanks. My oil never got over 260-265. In 65 days, how many coils have failed? Beru or the latest .07 pack?

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    Re: Exhaust/engine cooling mods

    I have never had a coil failure ( and most cars that I know that are tracking have not either). Car is a 2015.
    2015 Cayman GTS sapphire blue, PDK, PASM, GT3 LCA's - 7-18-2014 build
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    Re: Exhaust/engine cooling mods

    Bizarre that some do and some don't! Thanks for the input, much appreciated.

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    Re: Exhaust/engine cooling mods

    987.2 Caymans with a 9A1 engine have a shield over the coil packs.


    From E_987C-2_Katalog.pdf (PET) illustration 103-00:

    upper 1/2 shield: 9A1-104-307-03 Cyl 1 - 3, 9A1-104-308-04 for Cyl 4 - 6
    Lower 1/2 shield: 9A1-104-309-03 for Cyl 1 - 3, 9A1-104-310-03 for Cyl 4 - 6

    Those are the original part numbers. I looked them up and they have been superceded. All parts ending in -03 are now -04, the one part ending in -04 is now -05 and all four parts are priced about $22 each. Screws below are current and about $0.32 each.

    Screws (12 needed according to PET) 900 385 041 01 M6 x 12

    Attaches to cam cover and the part numbers for the cam covers appear to be the same as 981s, so I wouild look for the threaded mounting holes before ordering.

    It may not fit with the 981 headers, so you are at your own risk of fitment. Once installed, it will increase labor to change plugs.

    These parts fit all 987.2 and 997.2 cars, discontinued for 991 and 981s.

    V6
    Last edited by Voyager6; 07-23-2017 at 05:38 PM.

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    Re: Exhaust/engine cooling mods

    Thanks. I have seen one other post discussing those shields, which indicated they would fit, but I have to wonder why Porsche decided not to use them on the 981. Surely they didn't forego them just for the minimal cost savings or ease of coil swapping, but I guess anything is possible.

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