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Old 03-26-11, 07:37 PM   #16
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Quote:
-ecu mapped for 100ron (96aki here). huge thread on this over here:

do you have the link for this thread mentioned above?
so its assumed that jdm ecus use more aggressive ign timing maps? do people plugging jdm ecus into usdm cars have knock problems?

it seems strange that a manufacturer would tune a stock ecu so aggressively that youd see significant knock when using fuel that is only 1 or 2 octane lower than recommended.

not really an issue if you have engine management, but still interesting.
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Old 03-26-11, 09:41 PM   #17
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Quote:
Originally Posted by surreal
-ecu mapped for 100ron (96aki here). huge thread on this over here:
Over where?
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Old 03-27-11, 09:09 PM   #18
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Quote:
Originally Posted by surreal
do you have the link for this thread mentioned above?
found it and posted it up. http://forum.canada3si.org/showthread.php?t=4936 & here: http://www.3si.org/forum/f76/attn-al...-boost-491036/
Quote:
so its assumed that jdm ecus use more aggressive ign timing maps?
they have more aggressive ignition timing map and fuel map.
Quote:
do people plugging jdm ecus into usdm cars have knock problems?
i would assume so [i hope they are logging], but i dont think as harsh cause their udsm engines base timings are lower [im researching this right now, but i believe jdm engine base timing is 10deg+-2]
Quote:
it seems strange that a manufacturer would tune a stock ecu so aggressively that youd see significant knock when using fuel that is only 1 or 2 octane lower than recommended.
well all the manufacturers did it back then, im not sure about now. for ex. the skylines that come here get remapped right away to our fuel as i found out on gtrcanada and a chat with a few of its members. they experienced exact same thing.

simple solution to all this? datalog! i cant stress this enough with these cars. we have so many options now you cant make excuses.

*if you would like to continue this discussion please post up on the other thread.*
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Old 03-30-11, 01:23 AM   #19
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I think it may be worth noting that there were 3 distinct country specs produced. There is the JDM RHD GTO & GTO MR versions for the Japanese home market that has been widely imported by many other RHD countries (including the UK that has their own spec) as a grey market import. There is a UK RHD 3000GT version to meet some specific United Kingdom requirements. And lastly the the US LHD 3000GT & 3000GT Spyder versions for the US market. Any GTOs in the US or UK are grey market import JDM GTOs.

The JDM and US spec versions are pretty well known to everyone as far as what was offered on them and when. I have recently been talking to our UK mates and learned stuff about the UK spec that does not appear to be common knowledge and thought I would share it here to see if it merited adding to the Bible. If nothing else it may be food for thought for new upgrades, it has been for me.

First off UK spec, like the US spec, 3000GTs never had the power folding side mirrors of their JDM cousins, a popular retrofit in the UK since they have a lot of grey market GTOs. What they did have, starting with the 2nd gen (called Mark 2 in the UK),were unique cab controlled, electric height adjustable headlight beams, intended to allow the driver to compensate for a heavy load in the back. Active Exhaust was available in the first gen UK GTs, but was replaced in the second gen with the height adjusting headlights. Here is a picture of the headlight height control roller switch (taking the place of the Active Exhaust switch in the VR4), next to the commonly recognizable rear wash/wipe toggle switch.


Another distinct difference in their headlight lineage was that while the US & JDM cars had glass headlights in 1994, UK spec 3000GTs went straight to plastic headlights with the start of the 2nd gen (Mk2) in 94. However 2nd gen UK GTs did not get the 6 speed until 96.
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Old 03-31-11, 09:20 PM   #20
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wow very nice! appreciating all the info your finding out.
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Old 04-01-11, 01:29 AM   #21
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UPDATE (and edited above):

Active Exhaust was available in the first gen UK GTs, but was replaced in the second gen with the height adjusting headlights.

Further more, 2nd gen UK GTs did not get the 6 speed until 96.

Working on more stuff.
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Old 04-10-11, 10:57 PM   #22
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updated first post regarding EGRT input for guys that want to use it as map sensor/afr input
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Old 05-16-11, 09:54 PM   #23
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tiny update, found pic of hybrid LSD on MR's, thanks to ralliart3000gt.
edit: also added pics of the gto options catalog, bunch of stuff there.
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9b@13psi / 226awhp / 3750lb / 13.04@103mph 1.9'
15g@18psi / ???awhp / 3500lb / 12.50@115mph 1.9'

build thread
my visit to pitroadm
full vinyl wrapped 3000gt
the GTO bible - the JDM differences

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Old 05-17-11, 12:11 AM   #24
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That is a very interesting bit. Is it different from the standard MR rear diff? How was it offered?
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Old 05-17-11, 12:59 PM   #25
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good collection of info

so what are the odds of finding a part number for those plastic brake duct panels? has anyone checked caps? would be awesome if they could be ordered...
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Old 05-17-11, 02:21 PM   #26
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Quote:
Originally Posted by markingtime
That is a very interesting bit. Is it different from the standard MR rear diff? How was it offered?
the standard MR rear diff is the standard jdm 6spd rear diff. it was offered as an upgraded option.

ralli said it helped alot with understeer going into corners and neutralized the car coming out of them.
Quote:
Originally Posted by surreal
good collection of info

so what are the odds of finding a part number for those plastic brake duct panels? has anyone checked caps? would be awesome if they could be ordered...
the brake ducts are metal. you would need the A arm from the MR as well cause only they have the mounting holes/brackets for them. as far as parts numbers i got nothing. i think a search through japanese asa might turn up something though...
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full vinyl wrapped 3000gt
the GTO bible - the JDM differences
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Old 05-17-11, 02:34 PM   #27
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I have Japanese ASA but it works best with a VIN. Have one?
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Old 05-17-11, 03:20 PM   #28
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that rear diff is pretty cool but probably near impossible to ever find.

so there is actually a different a-arm produced only for the mr model..? strange.

worst case i could add the mounting points myself. although i might as well just make the plate myself too at that point haha. thought this might just be an easy short-cut.

markingtime; you need a vin/serial from a jdm gto?
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Old 05-17-11, 05:25 PM   #29
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Quote:
Originally Posted by surreal
that rear diff is pretty cool but probably near impossible to ever find.

so there is actually a different a-arm produced only for the mr model..? strange.

worst case i could add the mounting points myself. although i might as well just make the plate myself too at that point haha. thought this might just be an easy short-cut.

markingtime; you need a vin/serial from a jdm gto?


Yes, ASA is much more helpful when you can plug one in.
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Old 05-18-11, 02:46 PM   #30
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Quote:
Originally Posted by rez604
tiny update, found pic of hybrid LSD on MR's, thanks to ralliart3000gt.
edit: also added pics of the gto options catalog, bunch of stuff there.

You can still buy the Hybrid rear diffs new from dealers in Japan, not cheap.
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Last edited by markingtime : 01-19-13 at 08:36 PM.
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