Hi!
I have read through the tuning for emissions part of the manual and have a general question: I have been thinking of building a MS for years for my 1835cc beetle. In my case, the driving force is not HP, but rather emissions. I am not legally obliged to pass any emissions test as the car is from 1970, but it would be nice to be less of a strain on mother nature ;)
The engine is an 1835cc with dual solex carbs. Can anyone tell me what emissions figures I would be looking at if I changed the carbs to injection and possibly the ignition to electronic? I would naturally add a cathalytic converter to the exahaust. Would I end up in the ballpark of our 2001 Golf? It averages 180g CO2/km. What about NOx?
Megasquirting an 1835cc beetle - Emissions?
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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FixItAgainTony
- Helpful Squirter
- Posts: 82
- Joined: Thu Feb 03, 2005 1:09 pm
Re: Megasquirting an 1835cc beetle - Emissions?
AndersG,
You might find this post interesting: viewtopic.php?f=31&t=27300
My motivation is similar to yours: see how much the performance can be increased while decreasing emissions and learning a lot along the way. I went from a stock carburetor set up to the ~stock FI setup. That resulted in a substantial increase in power plus that added benefit that the car actually started in the morning. It also resulted in several stops at the emission referee station to get approval for the initial changes - sounds like that is not a problem for you as your car is not emission controlled.
I tried to find my old carburetor numbers but could not - I remember that they were very close to the limits they have here. I seem to remember that the HC emission was around 180ppm (limit 220ppm). Going to FI was night and day, going to a 3 way catalytic converter was also a huge change.
A lot will depend on the current state of your engine and how it is tuned. I had my idle rich on the last test I did, so my results were a little skewed.
I have since put in the EDIS wasted spark which is easy to put in and works really well. MAF sensor is getting wired up this weekend.
- Charles.
You might find this post interesting: viewtopic.php?f=31&t=27300
My motivation is similar to yours: see how much the performance can be increased while decreasing emissions and learning a lot along the way. I went from a stock carburetor set up to the ~stock FI setup. That resulted in a substantial increase in power plus that added benefit that the car actually started in the morning. It also resulted in several stops at the emission referee station to get approval for the initial changes - sounds like that is not a problem for you as your car is not emission controlled.
I tried to find my old carburetor numbers but could not - I remember that they were very close to the limits they have here. I seem to remember that the HC emission was around 180ppm (limit 220ppm). Going to FI was night and day, going to a 3 way catalytic converter was also a huge change.
A lot will depend on the current state of your engine and how it is tuned. I had my idle rich on the last test I did, so my results were a little skewed.
I have since put in the EDIS wasted spark which is easy to put in and works really well. MAF sensor is getting wired up this weekend.
- Charles.
Fiat - A great car for those who like to walk.
Re: Megasquirting an 1835cc beetle - Emissions?
Thanks! Seems that I will have to a) Build a CO2/HC/NOX meter, b) Plan a MS project for next winter. Engine overall condition is good. It was completely rebuilt in 1995, but has only been driven 1-2000 km/year.. OK. 14850km ;) Checked my notes.
I think that the carbs might be a bit worn and possibly never jetted optimally.
I think that the carbs might be a bit worn and possibly never jetted optimally.
-
FixItAgainTony
- Helpful Squirter
- Posts: 82
- Joined: Thu Feb 03, 2005 1:09 pm
Re: Megasquirting an 1835cc beetle - Emissions?
AndersG,
I would not worry about getting all of the measuring equipment. If the goal is strictly emissions, a narrow band would be fine. For optimal power type tunning, a wide band is worth it. I bought a wide band to help a friend jet his carburetors - that was a lot of work, and did not come out too well. When I went back to my car, one drive while data logging with the wide band followed by a little analysis with MegaLogViewer had everything pretty much dead on. It is a lot easier to tweak a Ve table with a computer than it is to change jets.
Good luck on your project,
- Charles.
I would not worry about getting all of the measuring equipment. If the goal is strictly emissions, a narrow band would be fine. For optimal power type tunning, a wide band is worth it. I bought a wide band to help a friend jet his carburetors - that was a lot of work, and did not come out too well. When I went back to my car, one drive while data logging with the wide band followed by a little analysis with MegaLogViewer had everything pretty much dead on. It is a lot easier to tweak a Ve table with a computer than it is to change jets.
Good luck on your project,
- Charles.
Fiat - A great car for those who like to walk.
Re: Megasquirting an 1835cc beetle - Emissions?
The guy who built my engine has a wideband lambda so we can test with that. As for an emissions meter, well if I can build one at reasonable cost, then it might be fun doing it ;)