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Old 08-09-2019, 06:18 PM   #11 (permalink)
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Quote:
Originally Posted by Stubby79 View Post
You could also find one for a Geo Metro, which has a similar sized engine, and splice it in.
That's another good idea, a Geo Metro being just a 1 liter engine.

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Old 08-09-2019, 06:53 PM   #12 (permalink)
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Quote:
Originally Posted by California98Civic View Post
That's another good idea, a Geo Metro being just a 1 liter engine.
Itís easier if the pipe diameter is spot on, length can be made up with flex hose
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Old 08-09-2019, 07:02 PM   #13 (permalink)
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Originally Posted by rmay635703 View Post
Itís easier if the pipe diameter is spot on, length can be made up with flex hose
Agreed, also it introduces a restriction on the flow that probably changes the exhause tune more radically than just introducing the honeycomb. If it undermines scavenging, then the CAT would possibly go part way to undermining the environmental and health benefits of emissions control, since the vehicle might become less efficient, no?

To be clear: I think adding the CAT is a good idea, for environment and health, in LV and in general. Less pollution is the better practice.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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Old 08-10-2019, 05:37 AM   #14 (permalink)
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Make sure you don’t already have one first. The VFR 800 got a cat in 2001(or 2000), SV650s got them somewhere around 2003-2006. It could be built into the stock muffler, the SVs’ are.

And to tell if a cat is working, measure pipe temperature before and after the cat. If the temperature goes up, the cat is working.
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Old 08-11-2019, 07:11 PM   #15 (permalink)
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The stock Honda exhaust already has a catalytic converter.
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Old 08-12-2019, 06:14 PM   #16 (permalink)
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It would be more complicated than just bolting on a unit. Check with the dealer tech people about the electronics involved.
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Old 08-14-2019, 12:25 AM   #17 (permalink)
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Quote:
Originally Posted by Grant-53 View Post
It would be more complicated than just bolting on a unit. Check with the dealer tech people about the electronics involved.
I think it would be easier to just strap a cat onto the bike, like this? ... https://www.telegraph.co.uk/content/...pg?imwidth=450

Might be better as a horn?

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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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Old 08-14-2019, 09:56 PM   #18 (permalink)
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Quote:
Originally Posted by JSH View Post
The stock Honda exhaust already has a catalytic converter.
I looked on my exhaust and what I thought was a "resonator" is indeed a cat. Sure doesn't seem like it's doing its job. My backpack and I stink after a ride.
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Old 08-14-2019, 11:00 PM   #19 (permalink)
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Quote:
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I looked on my exhaust and what I thought was a "resonator" is indeed a cat. Sure doesn't seem like it's doing its job. My backpack and I stink after a ride.
Is the catalyst still inside it? A previous owner might've gutted it.
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Old 08-14-2019, 11:39 PM   #20 (permalink)
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Quote:
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Is the catalyst still inside it? A previous owner might've gutted it.
It doesn't look touched. All bolts seem to be untampered with

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