Boxster S Stage II Upgrades....

[Adam]

Good pics. Thanks for sharing. That thumb looks like it hadda hurt. If possible try to get some feedback from the owner of the car concerning the mods.

[PorscheDoc]

Originally Posted by Adam

Good pics. Thanks for sharing. That thumb looks like it hadda hurt. If possible try to get some feedback from the owner of the car concerning the mods.

Hehe, it wasn't too bad till i dumped the peroxide on it to clean it

[trogdor]

Hey Porschedoc - I've always wondered what exactly the stage X rating means. I've played many hours of Gran Turismo and see it referenced on the net but don't know really what it means to have a stage 1 2 3 or 4 upgrade done... other than faster car... enlighten me please.

[BadBoyS]

Porschedoc,

Great pics and great informations. Whats flashing the ob II sensor? I see in the pic your using a lap top and have some idea its dealing with the computer. Are you making adjustmnents to fuel and mixture because of the intake change? Thanks again for this great info....

PS Glad the thumbs still intact!!!!

[Adam]

That's right. He's loading in software from GIAC to alter the F/A mixture and other parameters to accomodate the mods.

[PorscheDoc]

Yup, adam got it right, we use the OBDII port (diagnostic port for reading down codes, and getting into the cars ECU for other information) to "flash the ecu", which means we change the fuel and air curves for greater performance. Porsche leaves quite a bit of room to work with for tuning on these cars. Every different car has a "master" program you could say, which of course was tuned and mapped by GIAC. I go in and load that program into the ECU, which takes about 30 minutes.

As far as the Stages go, every different "tuner" has levels of tuning for a given car. For instance, our stage I kit consists of muffler, and air intake, which adds about 10hp. A stage I is therefore a few minor bolt on modifications that add a few horsepower, but nothing drastic. In this case, we are adding more air in and more air out...a good combination when used together. If you do one, you really should do the other, in order to optimize what goes into the engine and what comes out. Then the "stage II" would add the ECU flash, which will add another 15hp or so, and so on. Since the stage I changed the air coming and and going out, now we can more effectively "tune" the car to more horsepower. In the case of this boxster S, we also went with the secondary cat bypass, which gained us a little more horsepower, which i guess theoretically we could call a "stage III." More or less it just describes the extent of the modifications that have been done. As far as figuring out what goes in a stage kit, it kind of goes like this: We take what is available for the car, and then break it down into stages as we see components working together best.

I will do a writeup with pictures on the B&M short shifter for the next car i get in for you guys, so you can see how that is installed. Very easy to do as well, though getting the center console apart for the first time can be a little tricky when you are shooting blind.......Once you know where all the screw are, it is cake.

[BadBoyS]

Doc, Adam

great info once again. Is the Giac program something I can buy? I thought about playing with some of the mapping. Mostly I would like to read my own codes and trouble shoot and reset. I have a five years old battery that I am considering changing. I read in the bently book that there might be issues with disconnecting and may need to reset some codes as well as a bunch of other crap Ie window settings and the other list of things. Which brings about another question can I plug one of those cigarette lighter battery backups in and do the battery switch (quickly) with out damaging anything and also not losing power(above issues as well as reseting the radio) . The snow is falling here so Im playing in ther garage alot... THNAKS............................