The Zeitronix Kavlico precision sensor is of medical and military grade. It is about as accurate as you can get.

 

One more question then..... which version of EVOScan is the most rock solid right out of the box? I've been sticking with 99 because it does almost everything I need it to and it works. Some of the other ones had all kinds of forumula issues and such.

 

Well I upgraded to EVOScan 2.5 and as stated above the zeitronix inputs worked flawlessly. Thanks for the help.

 

I'm a little confused on the Zeitronix output. When it goes into vacuum the units change so that the signal is not linear as it crosses through vacuum? Or is this just a conversion that the Zeitronix ZT-2 software does?

I'm having a hard time finding a formula that reconciles my ZT-2 readings (in both boost and vacuum) with the same sensor read through EvoScan via the OEM MDP pin (Evo8).

I want to get this straightened out so I can move forward confidently on the jcsbanks SD patch. I have the GM AIT working perfectly and this is the only impediment to SD progress!

Thanks.

 

I should have spent a little more time with this before posting. The Zeitronix sensor is giving a linear output, but the Zeitronix software is applying a different formula when it goes into boost to convert it to inHG. Once I realized that and applied a correction to the numbers (P in psi = .491154 * P in inchHG), things made a lot more sense.

 

The Zt-2 outputs PSI for boost and inHg for vacuum when setup in PSI units. When setup in metric BAR and mmHg respectively. MSB is signed for vacuum.

 

This may be an odd question but, would it be possible to connect the JDM map sensor ecu signal to the zeitronix zt-2 datalogging system in order to monitor/log boost?

The reason I ask is because I would like to use the zeitronix zr-2 multigauge, which is plug and play with the zt-2, and it would be much easier/cleaner for me to be able to use the factory JDM MAP sensor.

 

not to go OT but does the jdm map lag at all with a serial to usb??

p.s. your sensor ships tomorrow. i have off. hehe

 

Bump.

 

I have instances when the USB input from the Xeitronix sensors would lag behind by a few seconds but I believe this has more to do with my computer and/or evoscan rather than the zeitronix. When I log my ZT map sensor and the JDM map sensor they are usually IDENTICAL except the ZT output applies slight smoothing it seems and thr JDM map sensor is more raw and jagged. Not nearly enough to consider them different in their purpose though.

Thanks for shipping that out!!!! Now I can tune the Mirage for boost!!!!

 

So, theoretically I could tap the ecu map sensor signal wire and connect it to the zt-2 and be able to see boost on the zr-2 gauge?

 

Yes, as long as you have the correct values required to be entered into the MAP sensor settings in ECUFlash. I tried doing it with MrFred over a year ago to no avail. I haven't been following things long enough to know if anyone ever figured out the correct values or not.

 

^Not sure you guys are communicating. I think the issue to tapping the JDM sensor is a question of configurability (is that a word?) of the Zeitronix software for the ZT-2. EcuFlash and EvoScan parameters would be irrelevant.

 

Right! I'm not sure if there is anything I can do to reconfigure the ZT-2 for the JDM MAP, but would I even need to if the output voltage/range of both sensors are the same?

 

The voltage swing of the JDM Map sensor and the ZT-2 sensor are WAYYY different. The ZT sensor has less range (.5v to 4.5v I think). The linear output of the ZT-2 is totally usable for logging but someone like MrFred needs to configure the parameters in the ROM to work with the ZT sensor when doing its calculations in the ECU. We tried it but there was little resolution using 8bit and I think he said it was better to do it using the 16bit signal or something. You should be able to have the ZT Map sensor signal be split between the ECU input and the ZT-2 input without any incident.