82 mm throttle body

[itsnotanova]

Originally Posted by ike84

Very cool dude! I'm a big fan of your work, I nearly cried when I got to the end of your original build thread .

One idea I had was to utilize the rear wing (I stole the idea from lambo) drill holes in the front face of the wing so that when air hits it it will be directed down and into the trunk. With enough perforations there will probably be plenty of airflow there. The problem obviously is water there, but if it's a dedicated track car I would think it might work well.

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Who or what is lambo? I've been thinking some kind of scoop too. Just enough scoop to pressurize the trunk to keep dirty air from entering elsewhere inside the trunk. Any water that would enter would leak out the bottom of the trunk and shouldn't be able to enter the motor.

[itsnotanova]

Ideally something like this is needed for the environment I race in. I'm not sure I want to take on building something that big and complex though

[ike84]

Originally Posted by itsnotanova

Who or what is lambo? I've been thinking some kind of scoop too. Just enough scoop to pressurize the trunk to keep dirty air from entering elsewhere inside the trunk. Any water that would enter would leak out the bottom of the trunk and shouldn't be able to enter the motor.

The lamborghini aventador has an active air management system that is ridiculously complex and equally impressive. One of it's components is the rear wing, the pillars of which are hollow and when appropriate will open up vents to channel air downward through the pillars. We obviously don't have pillars on outlet wings, but the body of the wing is hollow right? And the bottom of it communicates with the trunk. So you could theoretically turn the front of the wing into swiss cheese and it would (hopefully) pressurize enough to force air into the trunk.

Btw, those vents on the side should have a flapper on them to keep dirt out. I don't know if you still have them but it may help putting them back in to keep the dirt from the wheels out.

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[itsnotanova]

Originally Posted by ike84

Btw, those vents on the side should have a flapper on them to keep dirt out. I don't know if you still have them but it may help putting them back in to keep the dirt from the wheels out.

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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.

[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

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