On the BMW R1100 and R1150 models it makes no difference to the performance of the bike. No extra HP, no more torque, no dip in the power curve, no back firing or popping.
Any opinions on the O2 sensor? Should sense O2 the same, with or without the Cat, no?
I would lean towards an 02 bypass , pair plug and a fuel management device like a TFI if I were going to do something that major to the stock system.
A couple of people around the forums have gutted there cats and claim some increased performance , but I would like to see some dyno charts my self.A detrimental increase in turbulence could be a real possibility
gutting the header, seems to be a one way street. no going back.
Not trying to hijack the thread but after reading it a bit,.... How many of them are "true" catalytic converters?
Reason I ask is that it is labeled as such on my 05 nomad but all it appears to do is provide back pressure. Standard mod on the kaws is to remove/gut the "goat belly" (converter).
Are any of these truly converting anything?
Grumpy
(afraid to have bike rejected by the gubmint watchdogs)
Also, be sure to check your environmental awareness guilt level to be sure it can accomodate the thought of boosting your global warming contribution.
Also, be sure to check your environmental awareness guilt level to be sure it can accomodate the thought of boosting your global warming contribution.
...tried to gut my cat once. Took weeks for the claw marks to heal up, at least it quit trying to 'mark' it's territory.
sorry folx, coulnd't resist.
I really haven't ridden mine much yet, but the only sign of running lean, is 1st and 2nd gear, if you run it up a bit, then hold it at a steady speed, it surges.
A
Today was the warmest day I've ridden the bike so far (around 18 centigrade) and I could feel my right foot being toasted by heat from the cat in slow traffic. It's gotta go......
I finished it up today, not sparking clean inside, as I'd prefer, but nevertheless, it's open. There's an outer sleeve to the cat that is not removeable anyhow, unless you cut the chamber open.
I really haven't ridden mine much yet, but the only sign of running lean, is 1st and 2nd gear, if you run it up a bit, then hold it at a steady speed, it surges.
But, I'm pretty sure it did that before too. Other than that, runs great, and sounds basically the same.
I'm gonna' hold off on a PC-III for now.
I had one on my VStrom, they're very nice if really needed.....the Strom had a nasty stumble that was dangerous if pulling away and turning.
EDIT: I checked it after riding a few days, and with a small mirror, found a hunk I missed. It's now squeaky clean inside, just the thin liner remains. All told, I probly had 4+ hours doing it. Woulda' been much easier/quicker, if I had a lift table to get it up to a comfy working position.
Hi dmerc.
I no it was 2years ago, but i'm about to remove my catalytic converter.
Did u leave the headers on the bike or removed them?
what tools did u use to get it out (hammer, long bar/chisel/screwdriver) magic?
can u see the cat or do I work blind & hope for the best?
Your help well be most appreciated
Reardo
Had a R1100GS and I eliminated the cat and could not tell a difference in performance. If there was a difference, it was so little, that I didn't even go to the trouble of removing the one off my present R1150GS. I did take the muffler off though.
Fred