| Hi
Not EXACTLY the same bike, I know, but hopefully this might help.
I've got a pair of 998S's: one for the road, that I bought in 2002 and one I bought recently to convert to a race bike.
When I bought my first 998S (Jun-2002), I was told that with the new ECU setup (as you know it's not just an EPROM change, as on the old bikes), it was necessary to opt for a new ECU for any pipe change, in order to ensure adequate fuelling. The cost of these ECUs at the time was extraordinary (something like £800), but they came with a pair of 54mm Termignoni cans (and adapter pipe) for around £1,200. With that (and my warranty) in mind, I decided to go for that option, and I must say, the results were fantastic. My bike puts out 142bhp at the rear and is exceptionally clean all the way from tickover. I admit, I must have a "good-un" to get this type of output, but the smoothness is remarkable.
When I bought my second 998S recently, the previous owner had had a set of custom pipes made by Swona of Edinburgh (very good and strong company, with a lot of experience of such systems). The best they managed with a Power Commander III (the alternative to a DP ECU) was 133bhp, but on a different dyno unfortunately. The key point however, is that despite many efforts, they never actually got it to tickover cleanly.
Given what you've spent on the bike, and the necessity to keep your warranty up to date, I know the route I'd be taking.
Hope that helps.  |