GT engine lid and rain trays, Do you just go without? Options

[Rbcm2005]

So we are interested in installing a GT engine lid on our project because we like the look and it gets HOT where we are so thinking that the extra ventilation would help. However... it also rains here and we are guessing that Porsche didn't go with rain trays just for the fun of it.

What is everyone doing with regard to their rain trays when they install these GT lids?


CHEERS!

(IMG:style_emoticons/default/drunk.gif)

[ottox914]

GT lid, no rain tray, big honk'n intercooler between 2 ITB'S. IAT'S go up by 10-15 degrees from the lid being on vs being off and totally open. I wouldn't have thought it would make that much difference, but it does.

[JmuRiz]

GT lid, no rain tray, big honk'n intercooler between 2 ITB'S. IAT'S go up by 10-15 degrees from the lid being on vs being off and totally open. I wouldn't have thought it would make that much difference, but it does.

Otto, if it's OK to put a turbo intercooler there under the GT-style lid...would it be OK to put an external oil-cooler under there to help keep a 2.7/6 cooler...along with the standard on-engine cooler.

On-topic: I'll just try not to drive mine in the rain...and will probably use a stock-ish airbox on my conversion if I decide to go carbs.

[ottox914]

GT lid, no rain tray, big honk'n intercooler between 2 ITB'S. IAT'S go up by 10-15 degrees from the lid being on vs being off and totally open. I wouldn't have thought it would make that much difference, but it does.

Otto, if it's OK to put a turbo intercooler there under the GT-style lid...would it be OK to put an external oil-cooler under there to help keep a 2.7/6 cooler...along with the standard on-engine cooler.

On-topic: I'll just try not to drive mine in the rain...and will probably use a stock-ish airbox on my conversion if I decide to go carbs.

I'm no expert on a 6 cyl install, but I would think no on the engine bay oil cooler. Here's why. I know of a guy who did PCA track days in a bone stock 2.0 914. He had engine bay oil coolers (2) mounted to the far left and far right under a open single grill lid, no rain tray. And he cooked several motors before going to a front mount. This could be an extreme example, but at speed he was discharging enough heat from the coolers, the engine fan took it in and blew it over the cyls, causing more heat in the oil, more heat into the engine compartment, and the circle never ends. There must be a reason there is tin to separate the upper (cooling) and lower (hot exhaust) sections of our motors, 4 or 6 cyl. I think the intercooler works for me because the incoming air from the turbo is not nearly as hot as the oil, so not as much heat added to the system. The open grill GT lid, and the fact that the car is used for autocross, (shorter runs) help too. Len's heads that flow like CRAZY, and a much better than stock cam help keep temps down and stable. I have noticed that even with the open GT lid, my intake air temps run 10-15 degrees higher with the lid in place VS running with no lid at all. So even with all that mesh, less cooling air is getting in, and less hot air is getting out. I haven't tried to add some ducting from the IC to the lid, to better direct air flow. I may have to try that some day. The IC does have a plenum and sucker fan on the back of it, to pull as much air thru it as possible. Not sure if you would be considering this for your oil cooler set up or not. Without the plenum and fan, I don't think there would be nearly as much flow thru the cooler. I've been thinking of a removable, tall, 1980's F1 style scoop that I can mount on the targa bar when I'm at an autoX to provide some ram air intake for the intercooler. It'd look a little silly on a street car, but would be kinda funny on sundays... Could be a fun winter project.