Technical Emissions gear plan

[popsprocket]

Okay, so I need some commentary on the plan as to the emissions gear.

I'm going to (not right now, maybe in a few weeks/month when I get around to the exhaust) remove the emissions gear, so that's the vapour separators and the carbon absorber thingo. This will be good to consolidate the large amount of useless pipes in the engine bay and get rid of the unecessary hassle. Instead, I'm going to have a catalytic converter built into the new exhaust system (muffler is furked, needs replacing).

Thoughts? Comments? Anything I'm overlooking?

 

[erich]

Okay, so I need some commentary on the plan as to the emissions gear.

I'm going to (not right now, maybe in a few weeks/month when I get around to the exhaust) remove the emissions gear, so that's the vapour separators and the carbon absorber thingo. This will be good to consolidate the large amount of useless pipes in the engine bay and get rid of the unecessary hassle. Instead, I'm going to have a catalytic converter built into the new exhaust system (muffler is furked, needs replacing).

Thoughts? Comments? Anything I'm overlooking?

A cat isn't something you can just add... It will only be effective if the rest of the motor is (de)tuned to work with it. To get a sense of what a pain that can be, check out the emissions plumbing on a US-spec 1979 1500:yuck: So if you're going to desmog, and your local laws allow it, you might just as well skip the cat.

Removing the vapor separators and charcoal can won't make the car run any better, it'll just make your garage smell faintly of gasoline - although it does declutter the engine bay no end.

 

[popsprocket]

Interesting, I'll have to do my homework then, I admit this idea only came to me today while examining the extent of the rust and cracks in the muffler and the three metres of fuel piping in the engine that could be taken out...

 

[erich]

Interesting, I'll have to do my homework then, I admit this idea only came to me today while examining the extent of the rust and cracks in the muffler and the three metres of fuel piping in the engine that could be taken out...

What year and what carb do you have? It may affect the specifics of the desmogging exercise... But if you do it right you'll end up with an honest straightforward engine, completely free of strange weird "WTF is that" doohickeys and gizmos, and requiring no black magic to keep tuned and happy.

 

[popsprocket]

It's a 1979 and I'm pretty sure the carb is the 32DATR. I'll talk to someone at an exhaust shop about having the engine tuned to run with a cat.

 

[StorminNormin]

I have an Australian compliance 1980 model and as far as I can tell, there is no pollution gear on it at all. Given yours is the year before, I can only assume mine has been removed. It's also running what seems to be the stock exhaust system.

 

[popsprocket]

I just don't see a reason for the car to be overly dirty if I can add a cat and clean up the emissions a fair bit. I'll see how it all pans out as I'll be running unleaded fuel I suspect the emissions will be less of a problem than they were when the car was complianced - and of course there is no guarantee they will actually check the emissions in the road worthy assessment.

 

[Neojames2k]

Hi Popsprocket,

I've just had my car MOT tested which includes an emissions test. Just thought I'd give you the details to give you some insight of how clean the car can run.

My engine has covered 40k miles with stock euro cam (from what I understand the aussie cam is a little less gusty), I'm running it with a K&N pancake filter and the stock exhaust system (i.e no cat), Coil is pretty much brand new, as are the plugs (Bosch super 4's), It's currently running on 99 octane super unleaded which has had a fuel system cleaner added to it, Oil and filter have just been changed. The engine has been leaned right off for the test but I'm pretty sure it could be tuned back up and still pass

The figures I got for emissions are:-

CO %vol : 0.141 (Pass in the UK is <3.5%)
HC ppm vol: 171 (Pass in the UK is <1200)

From what I understand the Queensland emission rules are harsher than in the UK and you could be tested at the roadside at any time, correct me if I'm wrong (http://www.transport.qld.gov.au/Home/Safety/Road/Motor_vehicle/Vehicle_emission_testing/)

My suggestion would be to leave the exhaust system as stock and just tune your engine to within the emissions limits. that way you'll be able to keep the car stock (ish) and keep all of the engine power it was intended to have

Cheers
Neojames2k

 

[littlephil]

Mine is running standard euro airfilter and csc exhaust, just had a service and goes like hell! Mine is as follows:

CO2- 2.85%
HC- 721ppm


It hasn't been de-tuned for the test so i think that you can go so far with it still being road legal.

 

[Neojames2k]

Phil,

Mine was only done roughly as I was rushing to get it ready for the test, trust me to leave everything until the last minute, had a test a couple of months ago and one of the things it failed on was emissions so i knew it had to me tinkered with a little

looking at your figures tho, it passes in the UK but would fail in Australia or at least the part which popsprocket is from. Their maximum limit for HC (pre-1986) is 400ppm and even that is considered a "Poor" result

Are you running a full CSC or just the box with stock manifold?

Cheers
Neojames2k

 

[H105Daz]

To drop the HC readings, re-route the crank breather to a small catchcan type bottle to trap the oil/water vapor rather than being force fed back through the air intake.