After only a short time of using the Zt-2 with the LCD I have noticed something. The instructions do say "Do NOT tune vehicle while driving", fair enough. They shouldn't be held responsible for someone elses mistake. But what they should have said was "We made sure you can't read the LCD while driving so you can't tune". It appears, on my specific screen, that the response time of the LCD is far too slow for the refresh rate or data rate it recieves. The A/F always shows a blur after the decimal because the LCD can't properly display quick enough. I am sure this could be temperature related but I don't see it getting much better with 70º. The numbers are also small and not very easily read.

If anyone doesn't quite understand what I mean by 'LCD response time' try doing a little research on the subject, mainly concerning computer LCD display monitors.


Other than that everything appears to be working perfectly. I will now need to do some real data logging to get this thing tuned (because the LCD isn't much help).

 

Hmmm interesting..I figured that LCD would be a help...Im kinda glad I didnt go in on the group deal

-matt

 

The data logger still appears to be well worth the investment though. At only $250 for it and the O2 sensor you're not likely to find a better deal.

 

Well without the readout, what good is the datalogger ?? Only be able to see it through the labtop correct ??

Im new to all this stuff so be gentle with me

 

majority of the people I know that purchase the unit only use the display to monitor...any logging for tuning they usually run through the laptop

 

SR,

How did your TS AFR look above 6600rpm?

 

Looks like a blur. A rich blur. I won't really know untill I collect data.




edit: I just went out for a bit and noticed the heat did seem to help quite a bit. But it isn't feasible to tune while driving since the Zt-2 doesn't have a tach display. I will make some data files tonight and post them.

 

mine should be wired up and ready by friday.

 

Im in search of a good quality wideband with a digital readout only where the numbers are big enough to see while doing WOT sprints. Thats what shy me away from this unit, the readout numbers are really small.

 

Blu,

Look into the PLX M300 or M250 w/gauge, if you don't need logging.

 

How much does that run $$ ?? Im really not interested in the logging all that much either
Link ??

-matt

 

you need the datalog to tune with though.

what are you guys just wanting to see pretty leds? that is so :

 

im really considering the PLX M250 with the gauge

i would go and watch the short video here

http://www.plxdevices.com/2InchGauges.htm

there gauge seem to have a pretty fast refresh rate so it could used

im in the same boat i just want to do a 4th gear pull and make sure i dont ever go above 13:1 or below 11:1 for now that will be good enough and then ill just wait for the ZEM and i datalog everything with it

 

Umm no...I will be tuning on the dyno not on the street so no need for datalogging really. It is a nice feature but not totally necessary for what I want a wideband for. I want the digital numbers to monitor on the street so if it runs lean I can let out of it before something gets damaged.

 

looks good that will be next on the list, after the tranny buildup.

 

I would also suggest the Dynojet Wideband Commander. Prior to having the Zt-2 I questioned the use of an analogue gauge but now I see that it might be very useful. And it also does data logging.

 

Man...anyone seen the PLX R-500 coming in April?

http://www.plxdevices.com/R-500_productinfo.htm

 

That thing should just be labeled the SAFC3. But for $579 I will be content with what I have now.

 

Yeah, it's pricey, but I was leaning towards the M500, but didn't care for the wireless and realtime linked to a PC crap.

It does look like a SAFC though.

 

I have the Greddy wide band with their A/F guage and you can plug it into the emanage...

i think it should work pretty well

 

Since when does Greddy make a WB02?

I knew they had a narrow band, but where is their WB?

 

Trying to read a wideband while driving is really useless, if the a/f did go haywire you could not shut down fast enough to prevent damage if it was really off. Datalogging is the way to go.

Thats why I chose the FJO and the Maximizer because it will shut down if the a/f goes above or below a set value. Even a fpss will not shut down fast enough to prevent damage on a total failure.

 

Didn't you use a TechEdge before Jime?

 

Yes and I still have it but for safety purposes it sucks like the rest. I have spent close to $1k for the setup I have but I am confident that regardless of what happens it will save me. Believe me I do need it because I am a complete air head sometimes when I make changes and mistakenly put in the wrong jet etc etc. I have already replaced one engine last year under warranty because of that.

My 5.5 is a lease and because of that I am somewhat limited on mods and I also know that 1 engine is all I can probably get on warranty and I do plan on racing approx 24 events this season so I need every safety measure available.

 

Man you should be proud of that. You and SR both nuked a VQ35 motor with N20.

Did you find out what was the damage, ie bent rod, burnt valve, hole in top of piston, etc?

 

Holed piston and rings, one cyl was 0 and another 100 the rest were normal. When I took it in the first analysis was the coils, so they replaced them and of course no difference then they went a little deeper and replaced the engine.

Of course I played stupid and said nothing, I had already did the compression test and knew what was wrong.

PS that was a 200 shot testing on an old seldom used road. Regardless if I had of had the maximizer and FJO wideband that would not have happened, because I have duplicated the setup to prove it.

 

Get the Zt software here

Get my twenty minute drive home here .

The files are much smaller than I thought they would be. Be sure to setup the software for 6 cylinders and omit the boost, EGT and user data when studying my log file.

I have also noticed that my WOT A/F varies by one full point on different passes according to this logger. I am still learning this thing.

 

you're right, not quite a wideband... supposedly dead on accurate but... well i'll see what happens with it a lil confusion on my part

 

Can someone Explain what Data-Logging is and why is it soo good ???

I figured It would be a good thing to see as your driving..

I have no idea what datalogging is..can someone explain please

-matt

 

datalogging is taking information and storing it to take a look at it at a later time.

you can monitor a number of different sensors (rpm, speed, afr, flow, etc) and make adjustments with your fuel settings based on the information that you get.

I am planning on using my afr and rpm to tune my safc

 

if it hookes up to the factory O2 sensor its NOT accurate

 

Edit: Ignore this post. I was wrong. the narow band o2 is only from 0-1v, not 0-5v.

Actually it's VERY accurate for a narow range of AFR's. more acurate than widebands, because the voltage difference from 0-5v is all used withing a narow band of AFR's from 13.5 to 15.5. instead of a linear band from way down low (8.5ish) to way up high (20ish). So, the resolution of the narow band is better for a short range, but the range of the wideband is better.

Nate

 

it has a separate 02...

 

The log link isn't working.....

 

I'm not sure if I agree with that...at least OEM 02s aren't accurate. They don't measure AFRs, but whether they're on the rich or lean side of stoich as the ECU toggles them back and forth around ~14.7:1.

With boost, your AFR will be well past the valid range of a narrowband 02. Narrowbands are good at telling whether you are rich or lean, but not how rich or how lean, so they can't really be used for tuning FI cars, since you're dealing with 11-12.5:1 typical ranges.

 

I am going to be tunning while driving but Ill have the passenger logging everything in. I am just going to pull over to make adjustments. I bougt the screen so I dont have so many freaking gauges hanging around like a ricer! I am a ricer but like to keep it to a min.

 

Icey2k1 is right...
a narrow band is on only a 1v sensor, not 5v. 450mv=14.7afr it's only purpose is to tell the ecu which side of stoich the car is on. Using data from this sensor to try and accurately quantify your afr's is an excercise in futility.

 

hehe, its worse when you're driving aorund and people see you with the laptop... they start thinking Fast and Furious...

Coreys pLX and emanage on my laptop..
http://www.auto-upgrade.com/misc/PLXpic.jpg

 

IIS can be really sometimes. Try it now that I zipped it.

 

That worked...thanks.