Just found out that there will not be any more JDM sensors available until May. Please PM me to get on the list for the next batch.

 

does this work on the evo 8 yet? and what is the price

 

No, soon though.

 

nice

 

I thought the evo 9 map sensors are already a 3 bar sensor, and that the evo 8 one's are a 1 bar. whats the difference between an evo 9 and a jdm evo 9 sensor?
Also, what voltage does this sensor use?

 

Their all 5v sensors.. The USDM sensor is an MDP sensor, most markets got a 1 bar sensor which reads pretty much a few PSI over sea level, so its not designed to read boost.

The JDM 3 Bar sensor looks physically the same, the range is still 0-5v, the difference is the calibration would be different, 5v would be roughly 3 bar. where the stock sensr 5v would be 1 bar.

As far as anyone knows, the only sensor used on USDM Evo's is the 1 bar sensor.

You can also do something similar with a GM 3 bar sensor, only you would have to be a bit more creative with your installation. Not as big a deal with an aftermarket intake manifold, but on a stock manifold you can hook it up to another vacuum source, or remove the stock MDP sensor completely and put a fitting (that buschur racing sells) to adapt it to a barb type fitting. And then you need to build a calibration for the GM sensor as its not "known" what the settings are yet. (I haven't gotten that far)

 

but i am talking about the evo 9 sensor. i thought it was actually a map sensor. different than the evo 8 one

 

If you have an Evo 9, you can log the value in the sensor, you should be able to tell if it "tops out" and goes flat line before you hit full boost. If its a 3 bar sensor, it won't pin its value at all.

Of all the data that has so far been provided, the USDM Evo9 and Evo8 use the same MDP sensor, as does most of the rest of the world.

 

Well the evo 8 one, with part No. MD305600 reads inlet manifold diff pressure and is $139
and the evo 9 one, with part No. MN153281, reads inlet manifold absolute pressure and is $175.

so its not the same sensor. i guess someone has to test it out.

 

Well that clearly states a different part #.. But I still think its a 1 bar MAP anyway, Hopfully someone can test it out for you. Its silly to replace a sensor if its indeed a 3 bar. But I am fairly certain its a 1 bar sensor, regardless of it being MAP or MDP.

 

I've measured the characteristics of both the USDM Evo 9 sensor and the JDM Evo 9 sensor. Turns out that they are both MAP sensors, but the USDM sensor hits 5 V at about 2.3 psig while the JDM sensor hits 5 V at somewhere past 30 psig. I posted the voltage vs pressure curves in another thread. I think its the "silly idea to log boost" thread.

 

I have logged my map sensor and it flatlines at anything over 0 vacuum/ 0 boost. so its a 1 bar sensor.

 

With a 3 bar map sensor, the addition of a AIT sensor and some tweaking of the rom you can make the computer default into speed density , yes that means you can eliminate the MAF all together

I'll have a public "how to" released in the next few weeks.

 

Actually, jcsbanks and Bez are working on this very conversion. May take more than a few weeks, but it looks like it will happen.

 

Speed density on a stock ECU. Now that's tasty