Topic: o2 sensor on 550 Carpy pipe

[Dimitri13]

Alright, so since my powder coater is having issues with the ceramic coat for the exhaust, I decided I'm going to be installing a sensor and gauge after all. I had a few questions.

What gauge and sensor should I use? I was going to go down to the local checkers and pick up their kit. Any other suggestions?

I know there are some requirements, like it has to be after the collector and at some sort of angle slightly higher than horizontal to the ground. where should I mount it? Unfortunately I don't have the bike together to mock it up, and need this done relatively fast so I can't wait to put it together. My friend has a motogpwerks exhaust, and I know it's also a yoshi replica, but I'm not sure if it's exactly the same as mine.

Thanks in advance y'all.

[Powderman]

What issue is the coater having?  Why are you adding on O2 sensor, forced induction? Are you running a front fender on your bike?

[lucky]

You better read all you can about those O2 sensors!
Lots to know. There are different types.
Also they are only a rough estimate. Fine tuning is still plugs etc.,.

[Dimitri13]

the issue is that the ceramic will bubble, and he believes it's because air is getting into the Container during shipment. It has to get flown over, and its in plastic bottles.

I'm going to be running and very hot set up that, according to Honda man, will be very difficult to tune and time.

[Powderman]

the issue is that the ceramic will bubble, and he believes it's because air is getting into the Container during shipment. It has to get flown over, and its in plastic bottles.

I'm going to be running and very hot set up that, according to Honda man, will be very difficult to tune and time.

I do ceramic and powder coating for a living. None of what you said about the ceramic coating makes any sense to me. The ceramic is a liquid and air has no effect on it in a liquid state. When does the ceramic bubble, when he cures it or after it has been put into service on the bike? Is he using an air dry or oven cure ceramic?

[Dimitri13]

It bubbles when it cures it. I'm fairly certain it's oven cure.

I forgot what distributor he's using, but it happens with every batch and he's even been on the phone with them during the entire process.

[KrautKoffin]

Has anyone thought it was the exhaust and not the coating? Carpys pipe and the MGPWerks pipe are two very different pipes too. I'm local to both and have seen both in person.

[Dimitri13]

According to the coater, he figured it out and was getting ready to spray it. I'll let you know what it was when he replies.

[Powderman]

It bubbles when it cures it. I'm fairly certain it's oven cure.

I forgot what distributor he's using, but it happens with every batch and he's even been on the phone with them during the entire process.

Sounds like an issue with his prep process.

You better read all you can about those O2 sensors!
Lots to know. There are different types.
Also they are only a rough estimate. Fine tuning is still plugs etc.,.

I disagree, plug check only tells you the mixture at WOT. With a computer program the O2 sensor will read and accurately adjust A/F ratio through the whole rpm range.



















 

[Powderman]

According to the coater, he figured it out and was getting ready to spray it. I'll let you know what it was when he replies.

See if you can get his step by step application process.

[Dimitri13]

he said he was using the wrong equipment for the environment.

[Dimitri13]

Anyway, any suggestion on what kind/brand o2 sensor?

And to answer your first question, I will be running a front fender eventually. Right now I just have a tarozzi fork brace, and will have to fab a fender to fit. Why does it matter btw?

[scottly]

You need a wide-band sensor with a heater. I bought a narrow-band Edelbrock sensor in the mid '90s, and it was useless as a tuning instrument; it would fluctuate between full-rich and full-lean. I could lean out my home-brew EFI to the point the motor died, and it would show a 12.8 mixture up till the motor died. It was a waste of money..

[Powderman]

Anyway, any suggestion on what kind/brand o2 sensor?

And to answer your first question, I will be running a front fender eventually. Right now I just have a tarozzi fork brace, and will have to fab a fender to fit. Why does it matter btw?

Carpy has been putting out 500/550 pipes that are knock off of the Yoshi pipe and when copying it he used bikes that did not have front fenders and somehow made them stick out from the motor a bit further than the stock pipe. They have only about 5/8" clearance front the lower fender brace at standstill. When you hit the brakes and the forks compress the fender brace will contact the pipes preventing you from turning the forks. Not a situation I would want to be in at any considerable speed.

Here is the latest discussion on the matter. You'll see I am of a fan of Carpy but that doesn't belie the real nature of this issue. He claims this was just discovered last week but I know of another discussion of the same issue last year.
http://www.dotheton.com/forum/index.php?topic=54568.msg616709#msg616709

[Dimitri13]

Wow that's pretty crazy. Didn't even think about something like that. I won't be running a fender that long, so it won't be an issue for me, but I'll keep it in mind.

Scott, I was looking at the AEM uego wideband o2 kit. Came recommended by a bunch of car guys I talk with.

[CB750R]

I put an AEM wideband gauge on my ZRX1100 when I was having troubles jetting it. Was planning to do the same to the Honda. I don't know if the Carpy system has the ability to slip the tail off from the collector, but a non permanent option would be to put in a temporary pipe with the O2 bung welded to it in for tuning purposes, then remove the "test" pipe when done jetting.

I'm far from an expert but I felt like I got more progress with a few rides and needle and jet changes with the Wideband than I had in months or years in trying to butt dyno my carb tuning!!

It reacts very quickly to throttle position, and helped me dial in my bike and teach my butt dyno what is what!

Any autoparts store will carry 02 bungs, but they do make them in stainless if needed as well. 

[Dimitri13]

Thanks 750R. That was the kind of review I was looking for. Do you happen to know what thread size and pitch the bung is that came with the kit? I need to find one on-island tomorrow. My google-fu says, 18x1.5, but I just wanna make sure.

[brewsky]

I used the dynojet wideband commander since it was on sale at my local shop.
Mounted it temporary and removed it after tuning. Have switched it on three bikes so far.
Another thread:
http://forums.sohc4.net/index.php?topic=107406.msg1202535#msg1202535

[Dimitri13]

Looks good brewsky, but I'm getting a good deal on an AEM unit and I'm really digging the digital readout.

[seanbarney41]

I would think that splurging for one that uses a data recorder is really gonna be helpful...then you get vacuum and rpm data too, and even throttle position if you are clever.  Also, staring at a digital readout of A/F ratio during a WFO pass is not recommended.

[dave500]

are you going to run injection dimitri?

[brewsky]

Looks good brewsky, but I'm getting a good deal on an AEM unit and I'm really digging the digital readout.

I personally prefer the analog guage instead of dancing numbers, especially at speed, but that's a personal preference.
Either beats the heck out of plug chops, and allows easy tuning of lower throttle positions as well.

[Stoli]

What made you choose to go with the AEM over the Innovate LC-1?

[CB750R]

I'm pretty sure there is only one thread size to deal with. I sell them and we only have stainless or not in my catalog.

The aem is both digital read out with a analog sweep that changes color from green to yellow to red.  If you find a good long steady hill a few glances at WFO are fine. And honestly tuning at part throttle is more crucial for real world driving. That's where needle clip and shimming needles comes into play.  And having the feedback of the gauge is great for that.

I looked at the data logging. But while the Z has a throttle sensor, it's not like the Honda has a digital tach or anything to use a logger with. 

I got the AEM because I work in the Auto industry so could get a good deal on it.

I haven't really tested its weather proof ness as it sits snugly under the windscreen on my ZRX. So I make no claims on how it will hold up in rain! 

[Dimitri13]

Dave: No. Just stock carbs. But it's a very heavily modified engine, similar to a road race bike, that Mark says will be very difficult to tune.

I have the TrailTech Vapor digitial dash, could that be used with a data logger?