LRP and catalytic-converters

Why I aughtta'.........
Clem

 

Does a '97 GS have a cat? My '94 didnt. The 1150 range are all fitted with
cats, I wasnt aware that the 11 had them fitted as standard.

Al
(Two-cat TDM900)

 

Well, you'd better make your mind up Clem baby, I've advertised it and I'll
be selling to the first that comes along with the money. The White Power
shocks went today, that only leaves the sidecar to go and i'm getting
nibbles on it now.

Al

 

Oh, and the Staintune has no cat at all.

Al

 

yep it does
saw it at the house looked like my cat on the r1100s

 

Interesting... I recently had a conversation with a guy on one of the
650 beemers and noticed that it had 2 mufflers????
He mumbled something (?) to my retort that I thought the bike was
only a single... seems I might now have an explanation.
Rockit

 

Umm... [puzzled look] I just sort-of thought it would.......
I dunno.
Clem
(When I've unpacked enough I'll see if the handbook says)

 

I have no idea what you mean but there's a few 4-valve singles with two
mufflers. (One for each exhaust outlet)
Clem

 

please explain...

Nev..
'03 ZX12R

 

It does
It is directly underneat the bike where the header pipes go into it.It's
that huge thing that looks like a large can whick then trails off to the
muffler.

 

Dont know that's necessarily a cat, I never seen any info that said cats
were standard on R1100GS/R/RS/RT, I can remember info that they were
optional. It could just be a collector to add more volume to the exhuast
system, the larger the volume of the exhaust, the quieter they can make the
bike without reducing power.

Al

 

A catalytic converter is exactly that - it creates a chemical reaction
(Hammo translate that into the correct terms if you're unhappy with the
explanation, just don't start trying to have an argument about it OK ?)
In this case it helps turn the emmissions of a petrol engine into
slightly less noxious gases.

Well if you kill it you're going to create marginally more pollution, it
may also reduce the efficiency of your engine (ie less HP) if it gets
all blocked up and it can't breathe properly

Yes
JL

 

Clem's is efi but I didn't look for an oxygen sensor.
On my S the collector is the cat converter.
I want to get rid of it and get a flow through pipe but the cheapest
quote was $500 which I think is a rip off for a 70 cm Y shaped piece of
pipe.
How much noisier does it get if you replace the collector/cat?

 

'Zackly. You wouldn't unless you were desperate for Juice.

JL

 

Possibly, it may reduce the amount of gas you can flow and hence the HP.
You can fix that with a Dremel

Possibly. Unlikely I would intuit but I have no empirical data on it

One tank is unlikely to bugger it, although a tankful of leaded probably
would (I don't think there's been any proper studies done but I recall
reading that it didn't take a lot of leaded to screw a cat conv. fwiw.

JL

 

Naah they'll cope with a fair bit of lead (surprisingly tolerant of it
in my experience), the cat will get clogged long before the lamda sensor

Naah, making the cat less efficient just means more unburnt volatiles
into the atmosphere, the o2 sensor picks up the %age O2 it doesn't care
what the rest is afaik

JL

 

Knobdoodle wrote

LRP should be a minimum 95 ron same as the original leaded, I coulda
sworn there was some legislation on the matter but i can't find it now
in the 30 second attention span i have a the moment

JL

 

The Yamaha SZR660 has two exhaust pipes even though it's a single - one
off each exhaust valve. Wouldn't be surprised if the BMW and the Peg
(shares the same Rotax engine doesn't it ?) had the same.

JL

 

Clogged

It doesn't physically clog it up. It just poisons the precious metals that
coat the catalytic honeycomb.

It will also poison the lambda sensor which will lead to bad part throttle
running (closed loop) and poor fuel economy

You will find that tin is NOT the lead substitute in LRP. MOre likely
potasium or phosphous compounds.

Richard

 

LRP is 96RON... please get it right. Makes me wonder about the rest of
your "story"

Richard