'95 chip info

[Buck toenges]

Got a '95 993 c4 cab. What is your take on chipping the car? Is it benificial? Also how can I tell if my car is a wide body or reg body? It is wider then my old carrera 3.2. What is the body code for widebody?
Thanks,
Buck

[maxnine11]

hello Buck,
'95 is the last year of OBD I (on board diagnostics), before the federally mandated switch to the more complex OBD II. Your car is easier to chip than the later cars. Cheaper and more responsive. Contact Steve Weiner at Rennsport Systems. http://www.rennsportsystems.com/1aa.html
your car is not a wide body because:
-no widebodies in '95
-no wide body cabriolets any year
although calling the 993 Carreras "narrow bodies" is something of a misnomer
(the wide bodies are the Turbo, C2S, and C4S)

post a picture when you can!!
have fun,
max

[Bill Verburg]

'95 is the last year of OBD I

it was the last year of US OBD1, ROW 993 continued to use OBD1 right up to the end.

[motion]

Lets see the pics Buck! Looks like we have the same car.

[Buck toenges]

Here is my 993. Not quite the same color as yours. I have to admit that the 993 is my favorite of the 3 porsches that I own.

[surflvr911sc]

Nice P-cars!

If you are subject to smog inspections you might have issues. I'm not sure if they all do but I think it's safe to say most chips will turn on your check engine light. If you have to have smog inspections a check engine light will fail you.

Ingo, maker of the No Bad Days duel chip is planning on having a 993 chip as soon as he can get ahold of a 993 engine. This chip would allow you to go from the stock chip to performance chip w/ the flick of a switch, very cool & I have one in my 964 powered SC.

[Steve@Rennsport]

Dr.Williams:

If I can differ with you,.....

A properly made chip will certainly NOT trigger the CE light unless its not programmed correctly. I would ask you not to paint "most" chip tuners with the same brush.

A chipped engine that will not pass smog usually has other problems: bad guides, leaky valves, worn rings, bad oxy sensor(s), vacuum leaks, MAFS errors, etc.

[surflvr911sc]

I have been corrected. I was under the impression that it was just written into the code so it makes perfect sense that the C/E code could be taken out. And who would buy a performance chip that couldn’t get pass smog anyway, excluding track only cars?

I like that the NBD chip turns the light on so that I can easily tell which mode I’m in w/o feeling for the switch under the seat. I mostly just run the stock chip anyway.

Thanks Steve.

[Tom W]

Buck asked if it will pass smog... It depends on the chip.

I have a chip from Steve at Rennsport Systems and have passed CA smog testing without issue. I used a G-Tech to show that there was an improvement with the Rennsport chip when compared to the stock chip. I also compared 91 octane CA gas to 100 octane race fuel and found the chip made a bigger difference (testing was on cool CA coastal weather days and not 100 °F track days).

[Lorenfb]

Check out this website (www.systemsc.com) on the Technical and Problems
pages for some additional info on performance chips.

[Jim Richards]

Loren, are you promoting your business on the PP BBS? If so, does Wayne get a cut of the action?

[Lorenfb]

I don't solicit business as some do on this forum. Read my dealers page, though!
I promote biz though Pelican.

[Jim Richards]

[Lorenfb]

Could this be the Jim on the 993 forum at Rennlist who is a Porsche polish expert?

[Jim Richards]

No, I'm rarely on Rennlist. This is the Jim who spends way too much time on the PP BBS and thinks your posts on the threads about Steve Wong's chips were disappointing and your self promotion in the 964/993/996 forum contradictory to your harping on Steve W. in the 911 forum. But now that you mention it, I probably ought to get off my butt and polish / wax my 993 one of these days.

edit: my apologies to Buck and everyone for hijacking the thread. Sorry about that!

[Lorenfb]

I really have little regard for those who "prey" on the naive with
wild claims and marketing hype. That's what's going on over there.
Many have been "sucked" in by the hype without understanding the
caveats.

[ischmitz]

Originally posted by Steve@Rennsport
Dr.Williams:

If I can differ with you,.....

A properly made chip will certainly NOT trigger the CE light unless its not programmed correctly. I would ask you not to paint "most" chip tuners with the same brush.

A chipped engine that will not pass smog usually has other problems: bad guides, leaky valves, worn rings, bad oxy sensor(s), vacuum leaks, MAFS errors, etc.

Steve, let me throw in a little clarification for the NBD chip and the check engine light.

The NBD dualchip is essentially two chips in one where you can select either by the flip of a switch on mounted on the DME box under the seat. One is the stock code the other is the modified code. The reason the check engine light comes on when you use the performance half of the NBD dualchip is to allow you to know which setting you are running without having to feel for the switch position or install another dash light:

In the Bosch 8051 code the last two bytes are a check sum that if not met (say a bit flipped in the EPROM) throws up the error code 1_41 Replace DME. The same error would come up if the RAM test fails. Once you change anything to the original code (maps, rev limit, comments) you simply need to recalculate the check sum and the light wouln'd come on.

I liked the idea to have the check engine light to be on whenever I have the performance chip selected. You can still flash out other conditions to make sure a faulty sensor or dip swith does not go unoticed. I like this solution much better than other chips/tuners that/who simply disable the light altogether either by taking the bulb out or hacking the connector in the DME box because the tuners didn't know about the check sum or how to calculate it.

Cheers,
Ingo