CO% and fuel trim

[hyperdookie]

Just installed the 2-1 Termi...well almost. I'm still trying to sort out the install of all the crap for the tail section.Even with the PDF, it's still a little unclear so I figured I'll deal with the trim details later. With the VDSTS, I set the TPS and got a reading of 3.2 .I bumped up the fuel trim to 14 as suggested by other gurus on this site. I'm waiting for my vacuum syncronizer and am in the process of fabricating fittings to tap the header pipes, so I don't have any idea about cylinder balance. That being said, the bike idles nice,and sounds awesome! Still haven't taken it for a spin yet since the back end is still in pieces but I wanted to hear it roar. As far as the CO%, I'm getting about 1.5% in idle and 4.5% anywhere above 3000rpm at the tailpipe. Do these numbers jive? I,m assuming you want it lower in idle. This is just in neutral, not under load on a dyno.

[dukepilot]

Originally Posted by hyperdookie

Just installed the 2-1 Termi...well almost. I'm still trying to sort out the install of all the crap for the tail section.Even with the PDF, it's still a little unclear so I figured I'll deal with the trim details later. With the VDSTS, I set the TPS and got a reading of 3.2 .I bumped up the fuel trim to 14 as suggested by other gurus on this site. I'm waiting for my vacuum syncronizer and am in the process of fabricating fittings to tap the header pipes, so I don't have any idea about cylinder balance. That being said, the bike idles nice,and sounds awesome! Still haven't taken it for a spin yet since the back end is still in pieces but I wanted to hear it roar. As far as the CO%, I'm getting about 1.5% in idle and 4.5% anywhere above 3000rpm at the tailpipe. Do these numbers jive? I,m assuming you want it lower in idle. This is just in neutral, not under load on a dyno.

Make sure your engine is at operating temp. At idle, I shoot for CO at 4-5% at the tailpipe then I use the airbleed screws on the throttle bodies to balance the 2 cylinders. Your CO may read higher (6-7%) at header ports.

What type of gas analyzer are you using?

[hyperdookie]

Peter, Where U been. I figured you would be the answer man. I'm in the "automotive" industry, so I'm using an old "Allen Computer Test Center", it's old, but the readings still seem to be spot-on. Even now that they are measuring NOX in CA for smog,which the machine can't do, we can still screw with the CO numbers to make it pass.DON'T TELL THE STATE! Believe it or not, the cars that used to pass with flying colors on CO and HC, now fail the NOX test. If you give them a little more fuel, i.e CO , it seems to "wake-up" the cats.To me that sounds counterproductive. More fuel = cleaner? Anyways, I kinda trust the numbers.At idle,1.5, throttle open, 4.5. Maybe you could come up the road and check out our little shop. My partner has a 74' 750 sport, beautiful but needs some help. We also have a customers 67' 330 GT/C Ferrari if you like the old Italian stuff.

[dukepilot]

Originally Posted by hyperdookie

Peter, Where U been. I figured you would be the answer man. I'm in the "automotive" industry, so I'm using an old "Allen Computer Test Center", it's old, but the readings still seem to be spot-on. Even now that they are measuring NOX in CA for smog,which the machine can't do, we can still screw with the CO numbers to make it pass.DON'T TELL THE STATE! Believe it or not, the cars that used to pass with flying colors on CO and HC, now fail the NOX test. If you give them a little more fuel, i.e CO , it seems to "wake-up" the cats.To me that sounds counterproductive. More fuel = cleaner? Anyways, I kinda trust the numbers.At idle,1.5, throttle open, 4.5. Maybe you could come up the road and check out our little shop. My partner has a 74' 750 sport, beautiful but needs some help. We also have a customers 67' 330 GT/C Ferrari if you like the old Italian stuff.

Thanks for the invitation, I'd like to visit your shop and check out the stuff you have there. I'll send you a pm regarding this.

As for your bike, the most important thing is how it runs, throttle response, etc. Your analyzer might be old, but its probably better than the el cheapo I'm using.