82 mm throttle body

[ike84]

Originally Posted by itsnotanova

I probably did take those off as they're right next to my exhaust now. I'm going to seal them off with some sheet aluminum and raise the front of my trunk a little higher. If you ever look at your car after it's driven in the rain, you'll see the air coming off the side of the B pillar swings back towards the center of the trunk creating a slight higher air pressure right where the raised portion of the trunk would be. In theory, making a great location for a scoop.

Did you do anything to seal the ecu from dirt and water?

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[itsnotanova]

Originally Posted by ike84

Did you do anything to seal the ecu from dirt and water?

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The dme is tucked up under and I've never seen the need to. I've had boxsters at my yard with no trunk lids and the dme stayed dry even during the worst rain storms. The immobilizer I do have inside a bag and disconnected from the floor though. I have it sitting upright between the rocker panel and seat. I also have holes drilled in the floor so water cannot collect inside the floor pans. So far everything is staying dry. Before I reinstalled the windshield, the fuel gauge would stop working when it would get rained on. Immobilizer aside, these cars are pretty solid electrically. I've power washed the whole car inside and out. I wouldn't recommend cleaning the interior of your street car with a power washer. lol

[ike84]

Originally Posted by itsnotanova

The dme is tucked up under and I've never seen the need to. I've had boxsters at my yard with no trunk lids and the dme stayed dry even during the worst rain storms. The immobilizer I do have inside a bag and disconnected from the floor though. I have it sitting upright between the rocker panel and seat. I also have holes drilled in the floor so water cannot collect inside the floor pans. So far everything is staying dry. Before I reinstalled the windshield, the fuel gauge would stop working when it would get rained on. Immobilizer aside, these cars are pretty solid electrically. I've power washed the whole car inside and out. I wouldn't recommend cleaning the interior of your street car with a power washer. lol

That's good to know! I'm a huge fan of rhino lining the interior of off-road vehicles, but I'm going for a bit more a subtle look lol.

If you get on Amazon there are a ton of aftermarket hood and side scoops. They're primarily used by wannabe ricers but can function as a real scoop and they don't cost much. Instead of raising the trunk lid you could just cut a giant hole in it and mount a scoop over the hole. Kinda the poor man's version of your pic earlier. The aero images of our cars that I have seen show that to be a relatively low pressure area but I'm sure it can't hurt.

On a side note, when you flashed to 996 row, did your 986 guages still work appropriately? Whenever I get an hour off of daddy day care this is next on my list to do. I've read some say everything was fine, I've seen other say not so much. Reading wayne's article on cluster swaps it seems like after flashing to 996 I can go back through piwis and actually change the cluster back to 986 while keeping the 996 tune, but I haven't seen anyone actually detail doing this.

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[itsnotanova]

Originally Posted by ike84

Instead of raising the trunk lid you could just cut a giant hole in it and mount a scoop over the hole. Kinda the poor man's version of your pic earlier. The aero images of our cars that I have seen show that to be a relatively low pressure area but I'm sure it can't hurt.

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This "computer generated" aerodynamic picture somewhat shows what I'm talking about. That one line that starts on the hood and flows along the top of the door is close to what I see water spots do on my street boxster after driving in the rain. On my car it takes a sharper turn after the B pillar and flows right above the front corner of the trunk.

[ike84]

Originally Posted by itsnotanova

This "computer generated" aerodynamic picture somewhat shows what I'm talking about. That one line that starts on the hood and flows along the top of the door is close to what I see water spots do on my street boxster after driving in the rain. On my car it takes a sharper turn after the B pillar and flows right above the front corner of the trunk.

That's been my experience too. I actually dont mind driving with my top down in light rain so long as I'm above 35 mph because the aerodynamics keep the cockpit dry lol.

I wonder if it would work well to put a louvered panel or scoop along the top edge of the quarter panel to catch that line along the side. It shouldn't be difficult to route that air into the trunk and based on your racing pic it would probably be pretty clean and slightly pressurized at speed.

One thing I'm getting ready to do is to add a gt style spoiler (purely for look, guilty). With that in place though I think I will remove the stock spoiler assembly and cover that opening with a gutter guard that has a diamond mesh pattern. There won't be any ram air effect, just one more way for the trunk to "breathe" as I continue to add more stuff back there.

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[itsnotanova]

If I stay with the M96 motor, then I was going to use this scoop. By what I could tell from a rough measurement it should fit without too much modification to the roof. I believe it would fit through the rear window and the intake would be just above the top of the roof. About right where the red line turns to blue in the aero pic

[ike84]

Originally Posted by itsnotanova

If I stay with the M96 motor, then I was going to use this scoop. By what I could tell from a rough measurement it should fit without too much modification to the roof. I believe it would fit through the rear window and the intake would be just above the top of the roof. About right where the red line turns to blue in the aero pic

That should do it. I would definitely try to get the horizontal aspect of that as far forward on the roof and possible so that it's not right at the break line where air separates from the roof line. It may be worth it to place some vortex generators in front of it too to keep as much air in their line as possible. How are you gonna duct the air into the inlet from that point though? Are you gonna plumb it to the TB or just use it as a breather for your filters?

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[ike84]

Originally Posted by itsnotanova

The dme is tucked up under and I've never seen the need to. I've had boxsters at my yard with no trunk lids and the dme stayed dry even during the worst rain storms. The immobilizer I do have inside a bag and disconnected from the floor though. I have it sitting upright between the rocker panel and seat. I also have holes drilled in the floor so water cannot collect inside the floor pans. So far everything is staying dry. Before I reinstalled the windshield, the fuel gauge would stop working when it would get rained on. Immobilizer aside, these cars are pretty solid electrically. I've power washed the whole car inside and out. I wouldn't recommend cleaning the interior of your street car with a power washer. lol

Well lookie lookie - I was reading into oil cooler swaps/upgrades and found this pic. They're using it to vent an external oil cooler in a 987. That would do the trick though.



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[itsnotanova]

Originally Posted by ike84

On a side note, when you flashed to 996 row, did your 986 guages still work appropriately? Whenever I get an hour off of daddy day care this is next on my list to do. I've read some say everything was fine, I've seen other say not so much. Reading wayne's article on cluster swaps it seems like after flashing to 996 I can go back through piwis and actually change the cluster back to 986 while keeping the 996 tune, but I haven't seen anyone actually detail doing this.

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I have an automatic cluster in my manual car with a 996 ROW tune. Everything works but the check engine light is on and it's not on when I had the 3.2 ROW tune. Honestly the temp gauge is the only one I care about though.

Originally Posted by ike84

Well lookie lookie - I was reading into oil cooler swaps/upgrades and found this pic. They're using it to vent an external oil cooler in a 987. That would do the trick though.



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I might do something like that. The more I think about it, the more I like the dragster scoop sticking way high. Instead of the intake drawing air from the trunk, id point it straight up. I'd build another engine cover that the dragster scoop would then attach to. Not only would it get a slight tunnel ram effect, the extra air not getting ingested by the motor will help with cooling the motor. I have an overheating issue when racing in 90+ temps. It's in the 90's or higher for half the year down here. My only issue with the dragster scoop would be that I would probably have to modify the roof. I really don't want to do that because when time comes to part the car out, that roof would become worthless.

edit; Another benefit of the dragster scoop would be that hot air would escape easier from the engine bay when the car is not in use in between runs. I thinking I'm about to ruin a perfectly good roof. lol

[ike84]

Originally Posted by itsnotanova

I have an automatic cluster in my manual car with a 996 ROW tune. Everything works but the check engine light is on and it's not on when I had the 3.2 ROW tune. Honestly the temp gauge is the only one I care about though.

I might do something like that. The more I think about it, the more I like the dragster scoop sticking way high. Instead of the intake drawing air from the trunk, id point it straight up. I'd build another engine cover that the dragster scoop would then attach to. Not only would it get a slight tunnel ram effect, the extra air not getting ingested by the motor will help with cooling the motor. I have an overheating issue when racing in 90+ temps. It's in the 90's or higher for half the year down here. My only issue with the dragster scoop would be that I would probably have to modify the roof. I really don't want to do that because when time comes to part the car out, that roof would become worthless.

edit; Another benefit of the dragster scoop would be that hot air would escape easier from the engine bay when the car is not in use in between runs. I thinking I'm about to ruin a perfectly good roof. lol

Roof scoops are awesome, like the lotus exige. Definitely a complicated build but I think that your logic is spot on. Keep us posted!

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