StuartA
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| posted on 21/2/03 at 10:17 AM |
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Exhaust for bike engine
We are putting a '96 Fireblade engine in our chassis and have come to the point where we would like to get an exhaust for it. Because it is a '96
then we need to consider where we put a cat in the system and how we go about getting hold of one.
I have just spoken to someone at ST and he says that they do a whole system for £300 but in order to put the cat in the system you have to replace the
back box.  ST hire cats out at £120 a time, but it wasn't clear how long for or how this arrangement works. We live miles from ST and would prefer
a simpler solution where the cat could be put in in place of an existing straight-thru in the system. Has anyone done this? Where did you get your
exhaust? How much did you pay for the cat and what did it come from?
This applies to pretty much any bike engine, not just the 'blade. 
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MK9R
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| posted on 21/2/03 at 10:34 AM |
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We are looking at using a Tiger manifold/down pipe and collector, then putting a bike can on the end. The can will be able to be taken on and off an a
cat inserted between the pipe and can for MOT/SVA stuff. As the cat won't be on there at any other time, we are going use a second hand one off a
production car from a scrappers which should cost peanuts.
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StuartA
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| posted on 21/2/03 at 12:04 PM |
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That is the kind of thing I was thinking of. Not very familiar with cats, so do you know if generally they are put in the pipe leading to the box? Any
idea of the sort of price you pay from a scrappy, or what sort of cat is best? What about the lambda sensor, does it have any function in your design?
ST reckon that it would cost about £450 to buy a new cat.
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dodgyroger
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| posted on 21/2/03 at 02:44 PM |
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Stuart,
My understanding is that the CAT needs to come with an ECU to determine when it should turn on and off (based on engine temperature). I intend renting
from MK for £100 for 5 days. Their system is incorporated into a silencer and is a direct replacement for the standard MK Silencer (same length) so
swapping my MK silencer for their rented one and wiring it in should be straightforward in theory!)
The other argument is that Bike engines are so clean that they can pass emissions regs without a CAT. So just having a CAT visibly connected (even if
it does nothing) may get it through SVA?
Roger
http://www.dodgyroger.com/locost
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StuartA
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| posted on 21/2/03 at 03:17 PM |
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Hi Roger,
Just been having a look round the 'net and had a look at Tiger's website. They appear to sell a cat for a bike exhaust for £105. I have emailed them
to check the price. One of MK9R's pics appears to be of this setup. Doesn't look too bad, and would save having to hire the cat every MOT time (pay
for itself in 1 year effectively).
We had the same thought regarding the cleanliness of a bike engine, but doesn't seem to hold up if you are running it in a car.
Will let you know what Tiger have to say.
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dodgyroger
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| posted on 21/2/03 at 03:33 PM |
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Stuart,
Sounds v. interesting, look forward to hearing the verdict. Perhaps MK should lower their rental charge!
Roger
http://www.dodgyroger.com/locost
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