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Old 01-15-2012, 06:49 AM   #1
eg33GC
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EJ20K RS

Default 92-96 map sensor limitation (psi)

making a tune now for z32 maf, 850cc, and 20+psi

I have 24.9psi as the limit for the early style map sensor. anyone else confirm?
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Old 01-18-2012, 03:29 PM   #2
rob
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limit is 1.25bar relative which is ~18psi
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Old 01-19-2012, 06:33 AM   #3
Marnix
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Correct. The later 1997-1998 EJ20G/EJ20K MAP can read higher.
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Old 01-19-2012, 07:03 AM   #4
eg33GC
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marnix is that a direct replacement, barring wiring?

really need to work around this
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Old 01-20-2012, 08:00 AM   #5
pmugabi
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It is a direct replacement, bolts are the same placement and hose is the same size. Just drop it in and boost limit will be raised by about 0.4bar.
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Old 01-20-2012, 06:39 PM   #6
eg33GC
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thanks, as usual paul.
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Old 01-21-2012, 10:09 PM   #7
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If the sensor calibration tables are not changed to match the new MAP sensor, then the ECU will miscalculate boost readings and atmospheric pressure corrections.
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Old 01-22-2012, 05:41 PM   #8
eg33GC
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Temp based idle fuel enrichment8060Mass Air Meter Translation8080RPM scale for fuel tables8100Load scale for fuel tables8110Primary Fuel8120RPM scale for ignition tables84d0Load scale for ignition tables84e0Primary Ignition timing8500Ignition revision table87c0Max pulse width88f0Max boost8918RPM scale for boost table8920TPS scale for boost table8928Boost table8940RPM scale for max wastegate solenoid duty8990TPS scale for max wastegate solenoid duty8998Max wastegate solenoid duty89a0TPS voltage scale for Mass Air failure table8cb0RPM scale for Mass Air failure table8cb8Mass Air failure fallback table8cc0

any of those worded differently than what I'd want?
I can only raise fuel cut to 1.73bar with romraider.

I understand if you don't want to help. I'll be releasing the finished version free and opensource.
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Old 01-22-2012, 05:42 PM   #9
eg33GC
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should add that the maf scaling for the z32 maf is DONE. so anyone that wants to add it to their rom can have it
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Old 01-22-2012, 06:16 PM   #10
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Quote:
Originally Posted by eg33GC View Post
any of those worded differently than what I'd want?
I can only raise fuel cut to 1.73bar with romraider.
Not sure exactly what you are asking? There are some in your list that I don't have or use. Did you figure them out from the disassembly or another listing?
The boost cut max value is limited by the 8bit value the ECU uses. There are other limiters you have to worry about in addition to boost cut.

Glad to hear you have a Z32 transfer table. How did you come up with it? I have mine done, but need a lot more testing before I am comfortable making it available. I am curious how our curves compare. Again, there are other considerations than just the MAF table.

-Rob
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Old 01-22-2012, 07:45 PM   #11
eg33GC
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what interface are you using to make the scaling palpable? I have the code if you want to exchange your definition files for RR or the like
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Old 01-23-2012, 07:10 PM   #12
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lots of excel mostly. One day I'll share my deep, dark ECU secrets

But again just FYI, there is more to MAF scaling than just the changing the fuel scalar and the MAF transfer table.

-Rob
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Old 01-23-2012, 08:51 PM   #13
klys
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can a Z32 curve from nistune work (VQ table)?

for me it's easily avaible
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Old 01-23-2012, 08:54 PM   #14
eg33GC
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pm me
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Old 01-23-2012, 09:41 PM   #15
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Quote:
Originally Posted by klys View Post
can a Z32 curve from nistune work (VQ table)?

for me it's easily avaible

It is a good place to start.
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Old 01-23-2012, 10:33 PM   #16
eg33GC
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my major issue is i am NOT familiar with romraider, so I am trying to figure out how to add a maf scaling tab.


anybody have any insight? I'd use tunerpro but I am not redoing 10 tables in that just to get a maf scaling table.

my start so far:
injector scaling (850DW)
guess-n-go maf scaling by adding just raw code from 8080-80FF
added base timing a few degrees for closed loop operation to get the ball rolling (e85)
paul's pop and bang extravaganza


I need to figure out how the injector latency is setup in the code so I can add a half or full ms.

This is a lot more fun and difficult than the na 6 tuning was.
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