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 Post subject: AL500 Analysis - 01 Skyline VQ25DD
PostPosted: Wed Oct 19, 2016 7:33 pm 
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Joined: Wed Jan 08, 2014 11:07 pm
Posts: 652
https://nissanecu.miraheze.org/wiki/Rom_an_al500

Same idea as CF43D; the relevant background info is found on
https://nissanecu.miraheze.org/wiki/Rom_an
and
https://nissanecu.miraheze.org/wiki/Firmware_re


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 Post subject: Re: AL500 Analysis - 01 Skyline VQ25DD
PostPosted: Mon Jun 14, 2021 11:07 pm 
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Joined: Tue Apr 03, 2018 6:56 am
Posts: 124
hello. I need find speed limiter, but i cant find it. can you help me? Pytrex you can?
I find speed limiter for all another rom, but this al500 and al600 same roms and very strange


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 Post subject: Re: AL500 Analysis - 01 Skyline VQ25DD
PostPosted: Tue Jun 15, 2021 10:06 am 
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pirelli2006 wrote:
hello. I need find speed limiter, but i cant find it. can you help me? Pytrex you can?
I find speed limiter for all another rom, but this al500 and al600 same roms and very strange


Huh. It doesn't have the speed limiter BSR within the ETC function like in CF48D. So it has a weird implementation I suppose. If you know the speed of the actual limiter, you could plug it into the speed limiter value within RR, convert to raw, then search for that value +/- 2 (dec) to see if you could manually locate it that way. The issue is not every ECU has the stated speed limiter. For example, 350z's are rated for 155mph, but autos have a speed limiter at 144mph while manuals have a speed limiter at 155mph like expected.

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 Post subject: Re: AL500 Analysis - 01 Skyline VQ25DD
PostPosted: Wed Jan 19, 2022 2:25 am 
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Joined: Wed Feb 08, 2017 8:10 pm
Posts: 60
Pytrex wrote:
pirelli2006 wrote:
hello. I need find speed limiter, but i cant find it. can you help me? Pytrex you can?
I find speed limiter for all another rom, but this al500 and al600 same roms and very strange


Huh. It doesn't have the speed limiter BSR within the ETC function like in CF48D. So it has a weird implementation I suppose. If you know the speed of the actual limiter, you could plug it into the speed limiter value within RR, convert to raw, then search for that value +/- 2 (dec) to see if you could manually locate it that way. The issue is not every ECU has the stated speed limiter. For example, 350z's are rated for 155mph, but autos have a speed limiter at 144mph while manuals have a speed limiter at 155mph like expected.


If its a jap one it will be 180kmph as this engine also came out in a version of the stagea and all imports at that time are 180k limited.


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