987 v 986 Air box

[The Radium King]

It all makes sense. But I wonder if the DME just makes small corrections to one load/speed point on the map at a time or if it tries to smooth the map around the point of correction. The O2 sensor isn't fast enough to relay good data while the engine is dynamically changing, like changing loads or RPM. It needs the engine to be steady for a while to know what the conditions are at the intake relative to the exhaust.

Although, I suppose if they charactorized the lag, maybe they've figured out how to use that data too. Maybe.

i doubt that the dme is sophisticated enough to incorporate the 02 sensor lag into analysis, nor to interpolate the curves. rather, i *think* it tends to apply the stft to 'regions' of the maps - idle/coast, under load, wot, etc.

[Marchie]

This is perhaps one of the most interesting threads I've come across, regarding boxsters.
I'm hoping there is more info on this subject to come. Brad is there any more pictures of the air cleaner box after the modification , as it would be very interesting to see, pretty please . It's nice to see for a change no one ********************ing or telling you guys you have done it wrong or you don't know what your doing, lol.
A DIY for this install would be fantastic , and interesting. Keep up the good work.

[Brad Roberts]

Want to know why shop owners stay off the forums? We get tired of being told we are doing something wrong by an armchair engineer who has owned one Porsche and has only worked on HIS car. I speak with Porsche shop owners world wide on a daily basis (and Boxster owners nationwide) I tell everyone to take in all the information you can, but QUALIFY the person giving out the information (what do they do for a living?)

Luckily.. in the Boxster community, you have a LOT of smart people that solve problems!! other Porsche communities are sometimes lacking

In the picture below, we trim off what is the "muffler" We trimmed this first one back a tad too far, but did not get into the actual airbox. After trimming, you will see this "hole" that leads into the air box (or MAF housing)





B

[Brad Roberts]

This how I patched it:



We use a ton of 10/32 allen screws to attach body panels into nut sert plates, so we used two of them here with nylocks on the back to secure a small alum plate we made





Can a plate be fitted 100 different ways? sure.. pick your path. This took 10minutes max.


B

[Marchie]

Thanks for the reply Brad, Am still a little confused . We cover that hole, Why ? And what happens with the large cutout we have just made.
I'm definitely no mechanic, just trying to learn how things work so if they make sense to me I can then make a decision to try them or not.
Thanks for the help so far.

[onaFLYer]

Originally Posted by Marchie

Thanks for the reply Brad, Am still a little confused . We cover that hole, Why ? And what happens with the large cutout we have just made.
I'm definitely no mechanic, just trying to learn how things work so if they make sense to me I can then make a decision to try them or not.
Thanks for the help so far.

The hole is open to the engine compartment after removing the back side of the assembly, past the air filter. So you want to cover it so nothing gets sucked directly into the air stream and MAF w/o being filtered first. I have the same looking patch on mine.

If you look at the pic's I posted, the 2nd one shows the portion that was cut off, right behind the tube that comes out from the assembly past the main housing. Hope this helps.

[Marchie]

So what's the next step in the process . You cover the hole, then ? What happens with the large cutout section, please, Thanks