New Steve W Chip
 

Steve W. installed a chip in my stock 1987 Carrera yesterday. Steve also pointed out the brown, power zapping, "California/Japan Emisions" wire coming out of the DME control box (quickly disconected).

The change is immediate and unmistakable. Any flat spots or lagging sensation my Carrera had at lower RPM's are gone. The top end feels the same. But, below 4,500 RPM, my car is much more responsive and quicker. This will be my only mod as long as the Carrera is my daily driver. I am very pleased with the results thus far.

Steve: Thank you for the assistance with the installation and THANK YOU for the exhilarating ride in your car--Hehe!!!

Thank you Steve.

Sincerely,

Mike

- does this mean my euro carrera from Japan has this nasty little brown wire??

I mentioned this is another posting...

I added the SteveW chip and disconnected the brown wire also. I noticed alot of smoke and a headache inducing smell from the exhaust after that. I reconnected the brown wires, no more smoke, and smell is gone. The car still feels powerfull and the lower RPM range is definitely blessed by SteveWs chip.

So just in case you see smoke and get a headache from any exhaust smells, try reconnecting the brown wires, it worked for me.

LOLs Mike! Glad you like it, though I was thinking the improvement wouldn't be too noticeable after going for that joy ride with 493 hp and 500 lbs of torque! :D

Moazam, thanks for the update. Looks like the slightly revised low rpm/idle mapping which I implemented a couple of weeks ago caused the smell. One other person also kind of noticed it also. So keep me up to date, and if you want, we can switch you out with the previous version that had no problems.

Steve:

The improvement is noticeable. It just feels like I improved a 1950 VW Beetle. I hope to forget about the 500 lbs of torque soon so I can appreciate the relatively modest performance of my Carrera again--lol!

Mike

Kevin:

You should check the numbers of the engine in your car. The Japanese 3.2 is rated the same as the US spec, ie 217 hp rather than 230 as the true euro cars have.

You mean 207hp rather than 230hp right?

Nope 87-89 have 217 bhp.

Mike

Mike is right on the US 3.2s. The euros had 230 from the start. Higher compression and different DME

Er, Gentlemen: 231, 231 !!! :D

Paul:

With the "brown wire" off my DME and Steve W chip, I am sure I am feeling you at 231--perhaps even 232.5!!!

Mike

Steve - I've noticed my car smokes a little when coming off a sprint and back down to idle. It's scared me - I've been monitoring my oil intake so, don't think it's valve guides. Any chance it's the chip?

- checked before I bought it- its a Euro.

Here are my first impression after installing a steve w chip and disconnecting the brown wire in my very stock 86 carrera. I also verified that the throttle opens completely and that the full throttle microswitch closes.

Nicer to drive around town at part throttle. The car responds better to very small throttle inputs, making it feel like it's always ready to go.

A little more power at the top end.

No occasional hesitation below 2000 rpm when taking off from stop signs.

Possibly easier to stall when cold

No bad smells yet (and that's maneovering into the carport with exhaust tip passing within 3 ft from gf's nose)

/ Johan

Hi guys - here's a page from the Porsche manual on the terminal 10 brown jumper wires. Chris Bennet just reminded me of it and scanned this for us. The 15, 17, 18, 19, DMEs are 28 pin Euro/ROW DMEs, and the 16 and 20 DMEs are U.S. spec cars. For 24 pin U.S. boxes, the bottom chart would apply.

http://forums.pelicanparts.com/uploa...1069094285.gif

Hi Jeremy, Moazam, what you're seeing is from some fuel richness at parts of the chip mapping, which seems to be appear for some 87 owners and a 24 pin chip, with a certain variation of chip coding I am using. They use an entirely different coding for a 24 pin of that year. One thing that causes richness is a weak or disconnected O2 sensor. But Jeremy, what you could try is what Moazam did with the jumpers, or email me and we can try to switch you out with a different 87-24p program.

Hi Steve....hey I am still running (and liking) your chip in my 85....the car was originally a Cali car....is there an additional improvement I can make by diconnecting a wire that will not cause any other problems?....TIA

Seems so. Allegedley about 7HP difference (reading from another of SteveWs posts).

Marc, you still have it connected? Disconnecting it should make quite a difference for the 84-86 cars. On those years, leaving them connected almost seems as if no chip was installed. Give it a shot and tell me what you notice.

From:
http://forums.pelicanparts.com/porsche-911-technical-forum/135777-stevew-equipped-carrera.html


As per SteveW:

"Regarding the two brown wires off the DME harness you have inquired about, they are only supposed to be connected for California and Japan cars. Their function is to lean out the fuel mixture further to meet extra stringent emissions requirements in those regions and reduce the car's overall hp rating to 200 hp with a 0-60 of 6.7 seconds. The 49 state versions have 207 hp with a 0-60 time of 6.1 seconds. These are the published spec in your owner's manual. Just disconnecting these two wires with a stock chip will already improve the car's performance."

Wow....I cant wait to try it out....thanks...