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Old Mar 27, 2007, 07:40 AM   #16
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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.
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Old Mar 27, 2007, 12:48 PM   #17
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does this work on the evo 8 yet? and what is the price
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Old Mar 27, 2007, 06:28 PM   #18
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Quote:
Originally Posted by evodan2004 View Post
does this work on the evo 8 yet? and what is the price
No, soon though.
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Old Mar 27, 2007, 06:35 PM   #19
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Old Mar 27, 2007, 06:57 PM   #20
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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?
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Old Mar 27, 2007, 08:01 PM   #21
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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)
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Old Mar 27, 2007, 08:03 PM   #22
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but i am talking about the evo 9 sensor. i thought it was actually a map sensor. different than the evo 8 one
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Old Mar 27, 2007, 08:12 PM   #23
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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.
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Old Mar 27, 2007, 08:20 PM   #24
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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.
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Old Mar 27, 2007, 08:22 PM   #25
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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.
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Old Mar 27, 2007, 09:50 PM   #26
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Quote:
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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.
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.
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Old Mar 27, 2007, 10:00 PM   #27
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I have logged my map sensor and it flatlines at anything over 0 vacuum/ 0 boost. so its a 1 bar sensor.
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Old Mar 29, 2007, 05:26 PM   #28
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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.
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Old Mar 29, 2007, 06:01 PM   #29
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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.
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Old Mar 29, 2007, 06:21 PM   #30
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Speed density on a stock ECU. Now that's tasty
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