987 v 986 Air box

[Brad Roberts]

Now.. think about ALL those guy's who have bought the IPD plenum setup. They ALL have these parts sitting around (the TB and TB center section)

FYI: This is not new by any means. Porsche did this EXACT same setup in the 986 50Th anniversary car. Granted it was a Variocam Plus engine, but it was still a 3.2.

Something else.. scared of the larger throttle body? The rubber bellows from the MAF housing to the throttle body? They sell two versions. One for this 3.4 throttle body and one for the 2.7 cars (same one they used in the 50th anniversary 3.2 car)


B

[Brad Roberts]

I think it's a good idea to "help" this area (with a hammer) I didn't, but it would have made it easier to the install the bellows from thew MAF housing to the throttle body. Just a little nudge!! This is were the 86 and 87 chassis differs. They have more room right here.

B

[Kroggers]

Originally Posted by Brad Roberts

Now.. think about ALL those guy's who have bought the IPD plenum setup. They ALL have these parts sitting around (the TB and TB center section)

FYI: This is not new by any means. Porsche did this EXACT same setup in the 986 50Th anniversary car. Granted it was a Variocam Plus engine, but it was still a 3.2.

Something else.. scared of the larger throttle body? The rubber bellows from the MAF housing to the throttle body? They sell two versions. One for this 3.4 throttle body and one for the 2.7 cars (same one they used in the 50th anniversary 3.2 car)


B

As one of the people who has bought the IPD plenum - could you please elaborate on your point. Are you saying I made a bad selection or a good selection?

[Brad Roberts]

I'm referencing the IPD purely from a used parts standpoint

987s owner who bought the IPD will have the throttle body T section (and throttle body) available for sale (since they removed it and installed an IPD)

The 987 3.4 T section allows for the 3.4 throttle body to be installed in this situation for a lot less money!!

Want to go bigger later? Buy the 3.6 T section and install it into the 3.2 plenum, its the same diameter as the 3.4, but allows for the 3.6 throttle body.

Just giving people alternatives



B

[jaykay]

Nice how are you properly running the diverter flap in that Cayman diverter tee? Looks like you have a line going to the AOS for it as well. Which MAF housing did you end with? Perhaps you've loaded a 3.4 flash to have the DME run the extra flap and accommodate the larger MAF housing??

Just curious....I only see one Boxster engine and have to guess at things!

Originally Posted by Brad Roberts

Now.. think about ALL those guy's who have bought the IPD plenum setup. They ALL have these parts sitting around (the TB and TB center section)

FYI: This is not new by any means. Porsche did this EXACT same setup in the 986 50Th anniversary car. Granted it was a Variocam Plus engine, but it was still a 3.2.

Something else.. scared of the larger throttle body? The rubber bellows from the MAF housing to the throttle body? They sell two versions. One for this 3.4 throttle body and one for the 2.7 cars (same one they used in the 50th anniversary 3.2 car)


B

[JAAY]

Sorry I have not updated. It has been in the car over a week and it is running flawless. No codes etc.... What is amazing to me is that the 987 air filter has to have at least 2 to 3 times more surface area. The thing is huge. It was a bit of a pain in the butt to get the piping to fit the way I wanted. Like you know I don't have a typical 2.7 or 3.2 so my plenum sits differently. I was able to cut up the IPD silicone pipe I had and use that with some t-bolt clamps and got it all to work with the BMW mass air housing I am running. Using a beemer one because it was cheaper than a cayman one and I didn't need the mass air sensor itself that comes with it. I have yet to put my wide band back in but I may do it this week. I will let you know if it is running any differently. I can assure you thought that it is running real strong. Schoir can vouch for that. Let me know if you have any questions.

J

[jaykay]

Sounds good yes I will have the same problem......my tb will pointing the wrong way! Be sure to snap some pictures next time you have the engine open

[barkinfool]

Bump

My favorite topic of past few months, but as a non-engineer, hard to figure where this ended up & decipher. I have a '02S & would like to know what is the best option for more performance without breaking the bank -- appreciate the insights throughout but still a bit over my head. Where have the knowledgeable folks ended up on this 987/Cayman air box? Is there a combo that makes most sense for the 986S crew for better performance than stock?

Bonus Q: In PA, not near Brad in LA area, so any shop near Pittsburgh that it would make sense to approach since probably beyond my limited skills?

[JAAY]

Bark. I'm not too far and would help with what ever you need