Rev limiter?

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BlueRB240
 

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Rev limiter?

Post by BlueRB240 »

I'm not sure how off my tach is off but I tried to set the revlimter to 8500 but it zipped right past it to 9k. I tried to record the log but it seems to go crazy.
Attachments
wottest_2010-05-13_1604_18.csv
1st to 2nd then to 3rd where I slowed down.
(54.4 KiB) Downloaded 262 times
TM_S13
 

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Re: Rev limiter?

Post by TM_S13 »

most tach's are a bit off ... and 500rpm off, at that RPM ain't uncommon.
how does the tach behaves in the rest of the RPM range ?
is it spot on ?
BlueRB240
 

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Re: Rev limiter?

Post by BlueRB240 »

Yeah it's spot on. The VVL kicks at the right Rpms on the tach.
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Re: Rev limiter?

Post by BlueRB240 »

Tested it on the dyno today. Limiter was set @ 8300 The pull stopped at 9k no revlimit past 8k :(.
bardabe
 

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Re: Rev limiter?

Post by bardabe »

does this mean the stock nissan ecm can't control anything past 8K>
BlueRB240
 

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Re: Rev limiter?

Post by BlueRB240 »

On the SR20's so far it looks like that. I haven't tried it with my RB20 since I don't need to rev past 8k.
bardabe
 

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Re: Rev limiter?

Post by bardabe »

damn it i thought i'd be able to rock out nistune on my RWD VVL Swap i'm about to do. but i want to spin it to 8500 - 9K
BlueRB240
 

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Re: Rev limiter?

Post by BlueRB240 »

Not at this time, There is always tuner-pro but I don't know if they have it for the RWD sr20 ecu's. That will do over 8k.
Matt
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Re: Rev limiter?

Post by Matt »

You need tunercode (modified Nissan code) to get above the 8000rpm mark
CoZZm0
 

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Re: Rev limiter?

Post by CoZZm0 »

Well that's disappointing news as i had always thought that nistune sorted that issue and was a point that i used make about it. Bummer.

Its a shame that making a board for the SRxxVE ecu (2N500/5J000) is so hard (and i now realise why after doing some reserach about it) because i know those ECUs support way high limiters (9.5K tried and tested).
Matt
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Re: Rev limiter?

Post by Matt »

Nistune has never supported anything more than tuning the existing Nissan platform. There are no extras like launch control, flat shifting etc because it takes a long time to implement and its specific to each ECU

Consult patching is pretty generic once I separated the three firmware types and can run them over all the part numbers. Anything more specific is a custom job

Tunercode was aiming to fill the gap by making highly customised code but not sure where dave went with that one after calumsult shut down
bardabe
 

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Re: Rev limiter?

Post by bardabe »

so here is my question, even though it wont add a rev limiter past 8K RPM can we still tune that High and use an aftermarket rev limiter. say for example the Gizmo 2 step rev limiter? per say I only want to rev to 8500. can I adjust the table resolution accordingly. (further apart i guess that would mean) with the last cell being 8500 and the ecu will be able to keep up and make corrections / changes up that high?
BlueRB240
 

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Re: Rev limiter?

Post by BlueRB240 »

Even if the last cell is set to 8500 it will only read up to 8000. So the last cell value @ 8k is what it carries out to 8500 or 9000. It tends to get richer from what I have noticed.
PL
 

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Re: Rev limiter?

Post by PL »

From my experience most Nissan ECU's will quite happily run right off the end of both RPM and load scales with no ill effects. Which I still find amazing. But that's what they do. :)

PL
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Re: Rev limiter?

Post by BlueRB240 »

bumping this up to see if anything can be done? I hate reving without a rev limiter.
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