Well, I've been considering my options regarding my future install of the ATI procharger. One of my options for tuning appears to be a wideband O2 sensor with monitor and datalogging, similar to this http://www.techedge.com.au/vehicle/wbo2/ The reason I'm seriously considering this is because your car is not driven on a dyno everyday and the FMU may need some day to day attention to maintain the perfect A/F mix.

I've ran a narrowband O2 sensor on my carburated aircooled turbocharged VW motors to keep my jetting correct with different altitudes and this seems like an even better option.

This O2 monitoring device appears to be the most cost effective method so when I add new mods to my engine, I won't require the use of an expensive tuner, and a wideband O2 dyno, plus I'll have the constant reassurance if I go down to sea level my engine won't be running too lean.

I would appreciate any comments regarding my plan.

 

I run a tech edge wide band in my rx-7tt. It is the best deal for people like us. i.e... Street driven highly modified cars. I mounted it where I can see it driving in my 7. The 7 is much more sensitive to a lean condition than a piston motor. I'm sure ATI like most FI kit makers leave a good bit of power on the table by running pretty rich to ensure motor safety, so they don't get a bad name for blowing motors. In a piston motor you could properly get by with out one as long as you don't change things (cams, heads...) but hey they are alot cheaper than a motor! I’d really wait for the VER. 2.0 to come out it’s really hard to find the NTK sensor used with 1.1 or 1.5 for a decent price any more. The FI kits still are brand new so I’m going to wait to see how the kits run on other Z and for the 2.0 to come out.
Gary

 

That sounds good to me. Also, I would consider the use of an EGT if you plan on eventually changing pulleys to raise boost...personally, I would get one anyway. By using both of these you'll be able to get a nice cross-reference between power output (seat of the pants), air fuel ratio, and exhaust temps. Exhaust temps are directly correlated with air fuel mix, but sometimes one or the the other won't "tell the whole story," if you know what I mean...ie., you may want to richen your mix in certain situations to keep exhaust temps down, or leaning because you have room to spare in EGT's. $.02

 

7 eleven,

Yeah, you're right, I think waiting for 2.0 to come out would be better. I'd read there was a shortage of those sensors.


joeshow750,

Brilliant! That's a definite and something I didn't even think about. The one thing about it though is figuring out what is proper temps for my particular engine, and will vary depending on where the thermocouple is mounted.

I suppose If I mounted it on the header, coming out of one of the rear (leaner) cylinders it'd be my best indication. Now if someone could just write some software to display both EGT and O2 indications with a nice bar graph for each so I don't have to install two separate gauges that'd be perfect. That's probably some pretty specialty software though.

Anybody have some experience writing LabView Applications????

 

Very true. I bet somebody on a maxima forum, as they have been FI'ing the VQ for years, might be able to steer you in the right direction or at least give you a decent reference to begin with.


Again, I would check the max forums. As you said, position of the EGT will affect the the reading. What DSM guys have done, in gerenal, is mount them in the same place as everybody else, that way everybody's on the same page. Even if you put yours in the most "accurate" spot, if it's a different spot than everyone else you'll have no reference, which means you have to figure it out yourself. Actually, you guys being one of the first to get the ATI kit and go FI will probably establish that reference specific to the VQ35, but I still think FI info on the VQ30 in the max can help you somewhat.

 

Just emailed the guy who made some Windows logging software for the techedge unit. He said the ver 2.0 unit is going to have an EGT input line. So it looks like my prayers will be answered.

Now, if I bought a couple DIY kits, would anybody be interested in them. I believe the prebuilt kits are going to go for $450US and the DIY kits are $150. Depending on the difficulty of the soldering I could probably get those made for around $200. I'm a trained electronics engineer so I'm pretty handy with a soldering iron.

 

Jesse, I might be interested in one of the kits. Keep us posted!