Omniman, I have lotsa faith in your knowlege, testing, ect. I never knew the ecu could condense the values.

I apologise to all if my explanation is incorrect!

 

Are the Omni sensors linear and calibrated? I had problems with the GM sensors above 18 PSI, they can get very non-linear and make it hard to figure out how much boost you are running if you are using the ECU output to monitor boost. I switched to the AEM sensors, which are calibrated and gauranteed to be linear across their rated range, much better than the GM units.

 

"AEM" sensors are the best. Omni uses Motorola sensors, which are better than GM sensors. GM sensors are linear. They just have shotty electrical tolerances which can lead to noticeable inaccuracies. Motorola sensors are much better. Both tech sheets are available on the not2fast.com.

I suggest going with a 2.5 Motorola sensor for just about everyone as they aren't very small and delicate, but are still cheap. After that, the "AEM" sensors are best, period.

 

the Omni sensor is linear and also supported or configurable in all engine mangement systems. The AEM sensors are also very good. The gm sensors can be hit and miss, unfortunatly they have been replicated numerous times and can vary quite a bit. We actually sourced about 5 different GM style sensors and it was pretty interesting to say the least how they functioned vs the real OEM gm sensor. some were spot on while others didint work at all or were inconsistant. I think there are probably quite a few counterfeits of the GM sensor also, that have the GM logo and part number on them but are probably fakes. We make a GM style case that uses our 3, or 4 bar sensor inside and sell it as a universal that includes a pig tailed connector.

We have a voltage vs pressure formula for each of of the Omnipower map sensors that can be seen on our website under the instructions section. If you need to make a table or figure out what voltage will equal what pressure or for ecu calibration you can use the corresponding formula.

 

Omni, your document is riddled with errors. You should look it over again. Also, download DoPDF and make it a PDF rather than a word document. You should also use Excel and make some V vs P graphs for the sensors. Your current document is pretty awful.

 

Will the omni or hondata map sensor work with apexi power fc ecu?

 

SO DOES RUNNING AN UPGRADED MAP SENSOR THROW CEL'S ON A STOCK ECU??? Sorry for the caps but i figured it might get your attention. I really need an answer. Thanks guys!

 

and yes it will work with it Thank God 4 VTEC. MAP sensors are independent of the ecu. How well they run is based on the tune, however.

 

so willl it throw CEL's on a stock ecu for emission tests?

 

A 4bar on a bone-stock ECU won't throw a CEL, it just won't run your car, and certainly won't pass emissions. It will run it super lean, as well as run with very advanced timing. Even if you can get AFR's close using the O2 sensor, the sever timing advance will reduce power to nothing, if not blow up the motor.

There's no other magical answer. Run stock+stock, or 4bar+tuning.

 

ah i see. well i guess i'll either leave the stock MAP in since i only want 10psi at most anyway. Have you ever heard of other OBD2 drivers getting around it? The only way I can think of is cutting the wiring, again, and re-wiring the stock one in. Sorry for sounding like a noob.

 

Most OBD2 drivers swap to OBD1, but keep the OBD2 stuff for a rainy emission-test day. That, or they just get a turbo the size of a cow and shoehorn it into their engine bay.

Honestly if some cop knows enough that its not an OBD2, he'll DEFINATELY know what a turbo & intercooler is, and look under the hood. As for emissions, all you do is replace the obd1 ecu+harness/injectors/MAP sensor for the stock items. You can get by with it as long as neither you nor the emissions roller opperator doesn't go WOT and create boost.


Why are you so hell-bent on using the stock ECU anyways?

 

in regards to the last question: because, just as you said, you need the obd2 to pass the emissions. My question was how ppl with OBD2 FI setups pass emissions with their upgraded MAP sensors. It seems like a pain to recut the stock wiring to wire in the stock MAP. Just wondering if there was a way around it with the obd2 ecu in.

 

As I said, people cheat and remove the stock ecu. They get a drop-in MAP like a Hondata/Omni unit, and all they have to do is swap sensors - they are identicle, so they use the same connector and bolts.

Here's the Omni unit, compair that to stock:
http://www.omnipowerusa.com/product.asp?P_ID=133


Then they go OBD1 w/tuned EMS along with bigger injectors. For Emissions, they spend an hour swapping back the injectors, MAP, and ECU, and some in strict areas also swap out the turbo to be NA. Drive 2-300 miles to 'recalibrate' the stock ecu, pass emissions, then swap it all back. To sum it up, they don't run the obd2 ecu if they want to make decent horsepower ( >200).


Unfortunately, there's really no easy way unless you can register your car in a county that doesn't require emissions. In WI I can just say its 'stored' in Brown county, and I don't have to do any emissions bullshit.

 

I'm not talking about the omni though. I'm talking about the 2.5bar one off of xenocron. Those don't swap directly, as far as i know, which is why i'm asking about the wiring.

For some reason, I think you thought I wanted to drive my car on a stock obd2, which is not the case. I'm not sure if you were trying to correct me or not but, yes, i do know you have to use an obd1 ecu in order to get a good tune. That's exactly what i'm doing right now for my turbo accord.

I know how to make everything else pass emissions except for the MAP sensors that are not a direct swap like the Omni sensors, which is why I was asking if a new one would work on the obd2 COME TIME FOR EMISSIONS. So far, it just looks like a pain to deal with the xenocron 2.5bar MAP sensor as far as emissions goes, based on the replies. So I think i might give Omni a call and see how much a 2.5bar MAP sensor that is a direct swap would cost me. It's not cheap, but so far it sounds like the only solution.

 

NVM i was being dumb and realized that the xenocron kit didn't involve cutting in the stock wiring