ok,found the email, heres how it went (thanks to john for replying) scroll down to read the first email, it confirms that AMD did the work:
"Richard
The whole thing was ambiguous, as the original rolling road comparisons when the exhaust was swapped suggested that power went up from 217bhp to 230bhp or so (I can't find the article but it was used in the mag) with the Hayward & Scott straight-thru exhaust. But AMD's rolling road claimed that it was only 217bhp when it first went on before the re-chip took place. After two or three hours work, the re-chip eventually lifted output to 242bhp. Of the two rolling roads, I suspect the one in Norwich wasn't giving the right reading after the exhaust was swapped. But on the other hand, the exhaust must have contributed some beneficial effect.
Without looking at the rolling road print-outs, my impression of the car's performance when the exhaust was fitted and when the re-chip was done is that that both things had an equal effect. So if we assume an overall gain of 25bhp, either one probably brought about a 12bhp increase.
And yes, it was the 217bhp cat car originally. It looks like Adrian Crawford only sources cars to special order now, which is a bit of a shame as I'd probably have had another one off him by now.
I've wonderd about the hot film or hotwire conversion. I think it's what comes on the 928 as standard. Bit too pricey at the moment, but I'd be quite interested. Like to hear more about your turbo plans.
JT
----- Original Message -----
From: Richard
To: John Tipler
Sent: Saturday, October 26, 2002 2:14 AM
Subject: Re: Porsche re-chip query
john
thanks for the reply.
so you're not putting the 25hp increase down to the chip??
we have something in common in that we both bought cars from adrian crawford! i assume yours is also the lower powered usa spec engine, that originally came with a cat. - hence and as you said 217bhp??
i had mine dynoed as std and got 220bhp. i removed the cat. and replaced with a euro pre-silencer and got an extra 8hp. a dansk dual out silencer got me another 4hp, taking the total to 232hp - or what i thought i was getting when i bought the car!!
i was thinking of having the hotwire conversion done by amd, but thats on hold because i am looking into a very basic turbo setup (may as well make use of the low compression engine!!), which is not compatible.
i guess from what you are saying that i'd get an extra 10-12hp with the chip......mmmmm!!
i would definitely consider it after turboing, then amd can remap to suit.
i'll look out for the article.
thanks again
richard nelson
----- Original Message -----
From: John Tipler
To:
richard.michelle@btinternet.com
Sent: Friday, October 25, 2002 2:50 AM
Subject: Porsche re-chip query
Hi Richard
Your email to Chris Horton at 911 and Porsche World has just been forwarded on to me, and the answer is, no, they havn't run the article yet ( over a year on!). So your query is quite timely in that it reminded Horton that it's still sitting in his pending tray!
In a nutshell, the re-chip did result in a smoother power deliver, as Geoff Everitt ironed out most of the flat spots, and the engine was free to rev more easily. So I suppose it was worthwhile - cost about £250. Power was lifted from 217bhp to 242bhp, although the AMD rolling road was at odds with one in Norwich which suggested I had 230bhp or so after fitting a Hayward and Scott exhaust system. AMD was sceptical that the exhaust made any difference at all, even with the cat removed.
Hope that answers your question. It will be nice if the article is used - not merely because it will earn me a few quid!
Regards,
John Tipler"