Sneak peek ( 997.2) intake

[Cattman]

Originally Posted by Tom@Rennsport-1 Also, without giving away too many details , on your stock setup the airbox is located in the engine bay. It gets hot, so any air that passes through it also gets hot. In our case the intake air will be "cold" as in there will be no way for it to get "hot" as it enters the throttle body. So this new airbox/ filter will be somehow outside the engine compartment? Question: the air coming in on a stock setup is only in the passage (snorkel, to filter, past MAF, into throttle body) for a millisecond. Are you saying the unit (snorkel, box, filter) get hot and that heats the air passing through? I believe that, as I see cup cars' boxes wrapped in foil. But don't the holes you cut to allow drainage for water allow heat in? After all, heat rises. Also, on blacktop, in summer, in stop and go, that's meaningful. Not being a naysayer whatsoever- just interested in the dynamics. CATTMAN

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[Rennsport-1]

The deckilid is be very similar to a 997 GT3 cup decklid. The filter element is contained outside the engine compartment and inside the decklid itself. The large scoops feed air directly into our filter element which then mates up to a Carbon Fiber air inlet into the throttle body. We have placed two very small holes for water drainage and they are small enough where heat is not an issue.

[Cattman]

Sounds like a clever engineering solution- can't wait to see it! Perhaps you will make one for the earlier 997s?

As for the science behind it, I am interested in learning what the value of this modification equates to.

Specifically:
1. Apples to apples, what standardized decklid air temp are you looking at?Doesn't it vary, and change on a hot or cold day, in sun or shade? What standardized temperature you base your tests on is valuable insight, particularly as most of us drive when ambient temps vary by as many as 30 degrees within a single day.
2. What is the temperature of that same air (given deltas in ambient temp) during its millisecond of time as it passes through heated elements, including snorkel, box, MAF, etc? How many degrees hotter is that same air during that millisecond vs. off the decklid?
3. How do you normalize for the constantly changing temps, both outside the car, and inside the engine bay, to find an inertial frame of reference off of which to gauge metrics?
And finally:
3. What does that difference mean to performance? To put the finest point on it: if the temperature of air off the decklid is 67 degrees, and the plastic or metal or carbon bits which direct that air to the throttle body vary from as low as XX to as high as XXX (no idea, need you to tell me), then how hot is the air that gets to the throttle body? And ultimately, what do these additional degrees (cannot imagine them being more than a couple degrees higher) in temperature mean to performance?

Eagerly waiting to learn more! Thank you for innovating and sharing.
CATTMAN

[Tom@Rennsport-1]

Thanks for the questions Cattman. Another benefit of the design we're working on is that intake air will have a much more direct flow into the throttle body, AFTER being filtered. With your stock setup, air gets trapped inside the stock airbox in the engine bay before and after being filtered. With our setup, the filtration will take place outside the bay without the heat of the engine, with a direct flow from there into the TB.

Once we're 100% complete with our prototype we'll be sure to run as many tests as possible to hopefully answer your questions above. At this point, it's difficult to say, until we put it to the test. Our main goal with this part is form AND function, so rest assured we will make sure it works....and looks pretty.

[Cattman]

Sounds exciting! If it tests well, I hope you'll make one for all us 997.1 owners!
CATTMAN

[PersianGodFatha]

Cant wait... Tom will this work on the 997.2 none S also? Some of the intakes out there for the 997.2 only work on the 997.2 S and throw check engine light and other codes on the 997.2 none S

[911 S]

can't wait for this...

[Tom@Rennsport-1]

Originally Posted by 911 S

can't wait for this...

A couple more days! We'll be doing a test fit of the part on Friday or Monday. I'll try to sneak my camera back into the shop and get some pics when we do.

[07speed]

Originally Posted by Tom@Rennsport-1

A couple more days! We'll be doing a test fit of the part on Friday or Monday. I'll try to sneak my camera back into the shop and get some pics when we do.

...??????????

[PT Doc]

How are things working out?

[911 S]

come on guys.. we're waiting..