Jay Karolyi

bruce c59...the fact that you got your chip second-hand explains the pinging. When ordering new, Steve Wong asks you what octane to tune for and even what exhaust system you're using. I had his chip in my '89 G50 Carrera and it made a *huge* difference, not just in improved power, but in drivability throughout the power band as well. Wish I could get one for my '96 993.

boubi

Well, feedbacks seem good !!
I think I'm gonna try one of theses chips.
Thanks everybody

Stealth 993

I had a Autoathourity chip in my 95 it worked great, but didn't work with my Immobilizer, so I picked up Steve's chip.

Really like mid range, really smoothed out the power band, the car totally comes alive after 5000 rpm's.

No pinning at all, up here, but I can get 93, but most of the time it's 92.

samsnead

his chips are usually mapped for 91 octane, you can get it set up for 93 if you like.

RDS928S

There are no down sides to this upgrade as long as you tell Steve Wong what you have and what you want.

Rich

quasr

Very happy with my chip from Steve Weiner. Nice guy to deal with! Best of luck.

cab&coupe

+ 1... great guy and a Rennlist sponsor to boot

Floodj

I heard Steve Wong will remap your chip if you change your car around. Ie. you add a light weight fly wheel. Any truth to that?
thanks,
--Joe

clipstone

Thinking of going for one of these, given that the exchange rate makes on uber-cheap.

Just got a couple of queries though ... on the basis that the best fuel in the US seems to be 93ron, how does Steve get the mapping right for 98ron? (the answer to this may be really obvious, but I have no clue about engine mapping, etc!)

Also, when I did a search on the topic, I saw a couple of comments about the immobiliser light flashing constantly after the chip change - anyone know if this is an issue with Steve's chip?

Cheers

HJK

93 ron in us is like 98 ron in europe, the 93 number the us uses is not really ron but a formula of mon and ron.
H

Lorenfb

"93 ron in us is like 98 ron in europe, the 93 number the us uses is not really ron but a formula of mon and ron."

Per the 993 Porsche manual (WKD 498 621) and the 993 Workshop Manual,
the minimum octane required is a RON = 98 & a MON = 88. In the USA
the retailers, e.g. Shell & Chevron, calculate an octane rating using the
method of octane = (RON + MON) / 2. Using that method, the minimum
octane per Porsche based on USA pump indications is 93.

So here in SoCal those with a 993 and only having access to 91 are running
their engines on a marginal octane. This will result in sub-optimal performance
in some cases, e.g. various loads & temperatures, as the knock sensors will retard
the timing and thereby reduce engine torque. Furthermore, those using the
so called "performance" chips will be even closer to compromising overall
performance and cause a greater probability for pinging.

Bottom line: There's little to no margin available for "pushing the timing"
given Porsche's specified octane requirements.

cab&coupe

Dude... call (503) 244-0990 and ask for Steve

Falcondrivr

My '95 is OBD II. Anyone know if I can chip it? Or is it a '96 in that regard?

Stealth 993

Do you have the Varioram intake? I thought ALL 1995 cars are ODB I.

Steve Weiner-Rennsport Systems

'95 MY 993's should all be OBD-I which are non-Varioram cars (with the exception of the Carrera RS).

Take a quick look at your engine to see if it has the black plastic intake manifold or the aluminum Varioram one.