Re: Lack of a cat..
rocks said:
By taking the cat out,, the exhaust gasses hit the atmoshphere at higher temps as they get out faster( shorter distance and no chemical reaction),, hence the reason for the increase in better revving and feeling of a freeyer engine..
I see where you're coming from and whilst it's generally true that a freer-flowing zorst system helps to make more power (there are exceptions), I'm not sure the logic behind the above is correct.
I am not a fizzy-cyst or chemist but from experience with my previous bike (tuned-to-f*ck Kwak ZX-12R), I'd have guessed the opposite was true; the catalytic converter by design
gets very hot; that's how it works.
Shortly after I got the -12R and whilst it was still bone-stock, we did a little jolly jaunt to Monza and back for the WSB. All of my compadres complained at one point or another after having been behind me in a peage queue, etc. about the
amazing volume and intensity of hot gases coming from the tailpipe of my bike.
Later, when I'd had it tuned and had dumped the ocean-liner-sized end-can and system (complete with its catalytic converter) in favour of a (stultifyingly loud) full race system from Muzzy's the heat diminished tremendously.
The stock system used to get
sooo hot that a cow-orker of mine, upon seeing the bike for the first time with its monolithic titanium end-can, could not resist touching the shiny thing.
Before I'd had a chance to scream "NOOO!!!", he placed his palm on it. There was a momentary sizzling noise, a smell of cooked flesh and he withdrew his hand with a yelp, leaving the first layer or two of epidermis behind in an almost perfect hand-print.
Problem is if you running at high throttle revs for prolonged period and you run hi octain fuel eg optimax.. then you get hotter gassess..
Umm, if you run at higher revs, you get
more but not necessarily
hotter gases. Besides, one of the key things about fuels with higher octane ratings is that they actually burn
cooler, allowing higher compression ratios, more advance on the ignition timing, etc. Besides, why would you want to run a standard GS on Optimax (or similar) unless you're a multi-millionaire with money to burn?
I am no expert, but that is my understanding on how things work. I stand to be corrected if someone with a bit more technical knowledge of cats etc is able..
Heh, me either; paging Ole Holmblad!!
http://tinyurl.com/23vvs
Rik.