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Author Topic: disabling n75 while running ebc  (Read 13751 times)
jdm ej1 95
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« on: September 04, 2012, 12:00:22 PM »

dont tell me to put the n75 back on.. its not an option.. it was running fine without it on my old tune but since i loaded my own first file i need to get the codes for the n75 to go away.  what things need to be changed to get rid of the code with the n75 unplugged.

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nyet
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« Reply #1 on: September 04, 2012, 12:24:34 PM »

Put the n75 back on, throw away the EBC.
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« Reply #2 on: September 04, 2012, 12:38:51 PM »

LOL dude, read more, learn more.  The n75 is an ebc.

The info to remove codes is also here.  What you are trying to do is totally bass ackwards.
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DonSupreme
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« Reply #3 on: September 04, 2012, 03:08:23 PM »

Yes, but perhaps he wants to be able to switch boost profiles on the fly using his aftermarket EBC.
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jdm ej1 95
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« Reply #4 on: September 04, 2012, 04:40:37 PM »

Yes I like my eboost2. I searched about deleting n75 but couldn't find a straight answer
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Snow Trooper
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« Reply #5 on: September 04, 2012, 07:07:54 PM »

We can do map switching now too.

It just seems silly to swap a ebc that works with and in support of the factory ecu for a standalone unit that really has no more capability.
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Jason
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Breaks everything!


« Reply #6 on: September 04, 2012, 07:08:03 PM »

LOL dude, read more, learn more.  The n75 is an ebc.

Yes it is... One that has a PID loop that doesn't work over 2550mbar absolute.  How many of you guys tune past the MAP and drive your cars places with excessive density altitude changes on 91 octane?

The great thing about my MBC is that I never have overboost issues with air density changes... That means my tune is consistent whether it's in the 20's here or 120+ here.  We see 100 degree temp swings in Arizona.  I pin the throttle at 80 in 6th gear and I see the same boost regardless of the outside temp, or if I'm in California, etc.

If you leave the N249 working, throttling losses are not a problem because the bypass valves are open until the ECU requests boost.

Leave the N75 in place and cap it off.

To disable throttle cut for overboost, locate KFDLULS and FF the whole table.

That is of course unless somebody can prove you can use the N75 beyond the map limit and consistently control boost regardless of air density or engine load.
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Snow Trooper
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« Reply #7 on: September 04, 2012, 07:10:20 PM »

Yes I like my eboost2. I searched about deleting n75 but couldn't find a straight answer

Don't search n75 specific but rather how to remove fault codes in general.  It was tony or setzi I believe that made the post on the process.  Of you really want to do this leaving it plugged in is your easiest route.
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elRey
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« Reply #8 on: September 04, 2012, 07:10:54 PM »

ESKONF
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« Reply #9 on: September 04, 2012, 09:11:25 PM »

Yes it is... One that has a PID loop that doesn't work over 2550mbar absolute.  How many of you guys tune past the MAP and drive your cars places with excessive density altitude changes on 91 octane?

The great thing about my MBC is that I never have overboost issues with air density changes... That means my tune is consistent whether it's in the 20's here or 120+ here.  We see 100 degree temp swings in Arizona.  I pin the throttle at 80 in 6th gear and I see the same boost regardless of the outside temp, or if I'm in California, etc.

If you leave the N249 working, throttling losses are not a problem because the bypass valves are open until the ECU requests boost.

Leave the N75 in place and cap it off.

To disable throttle cut for overboost, locate KFDLULS and FF the whole table.

That is of course unless somebody can prove you can use the N75 beyond the map limit and consistently control boost regardless of air density or engine load.

Think about what you are saying... Above the map limit we are working off a fixed dc, which is then a fixed value much like an mbc.  In my area we have roads with multi thousand foot elevation changes and our seasonal temp swings are over 100 degrees.  I am very well versed in the behavior you seem to like about your mbc, the n75 will do the same.
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jdm ej1 95
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« Reply #10 on: September 04, 2012, 09:22:03 PM »

thanks guys ill figure it out....


for the n75 lovers.. i dont have it anymore.. the car is a full custom 3L with no factory rails/vac/boost sources.  the eboost 2 is already there.. and i enjoy it.. hence why i said its not an option to go back right now.  i see no problems running the EBC.. nor do i see any major pros to the n75.... it is what it is at this point.
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Jason
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Breaks everything!


« Reply #11 on: September 04, 2012, 09:40:46 PM »

A ball and spring MBC is a mechanical PID whereas a fixed duty cycle on the N75 is rate limiting your wastegate bleed through what can only be described as a choking through a flow limiting orifice.  

Because the flow rate through the orifice at a given upstream pressure can vary based on the downstream pressure (ambient), there will always be a proportional gain or loss based on changes to ambient pressure.

A flow limiter is not a pressure regulator.

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infinkc
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« Reply #12 on: September 07, 2012, 12:49:10 PM »

zero out kfldimx and kfldrl  i ran a mbc this way with the n75 disconnected.

Where is that thread how to disable cels, ive been searching and cant seem to find it.

** edit found it http://nefariousmotorsports.com/forum/index.php?topic=567.0
« Last Edit: September 07, 2012, 12:57:03 PM by infinkc » Logged

prj
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« Reply #13 on: September 11, 2012, 12:25:01 AM »

A ball and spring MBC is a mechanical PID whereas a fixed duty cycle on the N75 is rate limiting your wastegate bleed through what can only be described as a choking through a flow limiting orifice. 

Because the flow rate through the orifice at a given upstream pressure can vary based on the downstream pressure (ambient), there will always be a proportional gain or loss based on changes to ambient pressure.

A flow limiter is not a pressure regulator.

Ever heard of KFLDIOPU? Not disagreeing with what you said, but you describing your symptoms sounds like that map was just not dialed in right/left stock.
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Il Signor Zetec
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« Reply #14 on: September 12, 2012, 03:38:32 AM »

Off topic

Excuse me prj, I sent  you mail and pm: can / would  you help m? Kplease !
Thanks and Excuse me tor this off topic
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