j-spec ecu whats the black box?
01-12-04, 12:18 PM
#1
j-spec ecu whats the black box?
When I got my j-spec ecu, N374 ECU it had a little black box on it, I asked what it was before and I didnt have pics the I saw it on ebay. so look at image #4.
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2453780001
http://cgi.ebay.com/ebaymotors/ws/eB...tem=2453780001
01-13-04, 01:12 PM
#7
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Originally posted by Kelimutu
Interesting, can it have something to do with the speedlimiter that JDM cars have?
Interesting, can it have something to do with the speedlimiter that JDM cars have?
Originally posted by dorifc3s
Whats the benefits of a Jspec ECU?
Whats the benefits of a Jspec ECU?
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01-13-04, 01:23 PM
#8
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Originally posted by NZConvertible
None.
None.
There are obviously differences between the ECUs, so no one is gong to take that answer seriously unless you can back it up.
In order to make a rational decision about the possible benefits of a different ECU, one needs to know what the differences are.
If you don't know what all the differences are, then you can't (shouldn't) authoritatively state that there is no possible advantage.
01-13-04, 03:22 PM
#9
I have pictures of the little box opened, I dont know what good it will do if no one has any clue what it does, I can post em if someone wants me to.
It is in the ECU but cant you defeat it by removing a screw off the back of the gauge cluster?
I also thought that the j-spec ecu had differences in the emissions control?
Originally posted by NZConvertible
No, the speed limiter is part of the ECU's firmware, not an external module.
No, the speed limiter is part of the ECU's firmware, not an external module.
I also thought that the j-spec ecu had differences in the emissions control?
01-13-04, 03:27 PM
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Originally posted by xfeastonarsex
I have pictures of the little box opened, I dont know what good it will do if no one has any clue what it does, I can post em if someone wants me to.
I have pictures of the little box opened, I dont know what good it will do if no one has any clue what it does, I can post em if someone wants me to.
Originally posted by xfeastonarsex
It is in the ECU but cant you defeat it by removing a screw off the back of the gauge cluster?
It is in the ECU but cant you defeat it by removing a screw off the back of the gauge cluster?
Originally posted by xfeastonarsex
I also thought that the j-spec ecu had differences in the emissions control?
I also thought that the j-spec ecu had differences in the emissions control?
01-13-04, 04:03 PM
#12
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Originally posted by theloudroom
Well then what is this black box then?
Well then what is this black box then?
There are obviously differences between the ECUs, so no one is gong to take that answer seriously unless you can back it up.
In order to make a rational decision about the possible benefits of a different ECU, one needs to know what the differences are.
If you don't know what all the differences are, then you can't (shouldn't) authoritatively state that there is no possible advantage.
In order to make a rational decision about the possible benefits of a different ECU, one needs to know what the differences are.
If you don't know what all the differences are, then you can't (shouldn't) authoritatively state that there is no possible advantage.
The differences between the ECU's are from the different equipment connected to it. Only US cars have AWS valves, EGR valves, shift-up lights and port air solenoid valves; only Japanese cars have speed limiters. It's quite possible the ECU's are physically identical, and only the firmware related to this equipment is different.
Originally posted by xfeastonarsex
It is in the ECU but cant you defeat it by removing a screw off the back of the gauge cluster?
It is in the ECU but cant you defeat it by removing a screw off the back of the gauge cluster?
BTW, just because that box is attached to the ECU doesn't mean its part of it or has some effect on its operation. It's obviously a factory piece, but it could be for anything.
01-13-04, 04:28 PM
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Originally posted by NZConvertible
I have absolutely no idea and never implied I did. I'm as curious as anyone to find out what it is.
Before you vent at me, you should consider the question asked, which was "what are the benefits of a J-spec ECU?" There are quite a few differences between US and J-spec ECU's, but there are no advantages to using it since the engines are basically identical in operation. Some have suggested the Japanese ECU's have more aggressive tuning to suit their higher-octane fuel, but I do not believe this is the case for cars of this age. Jap-import FC's and other Jap-import 80's turbo cars run without any problems on NZ's lower-octane fuel.
The differences between the ECU's are from the different equipment connected to it. Only US cars have AWS valves, EGR valves, shift-up lights and port air solenoid valves; only Japanese cars have speed limiters. It's quite possible the ECU's are physically identical, and only the firmware related to this equipment is different.
the ECU receives a speed signal from the speedo. Removing the screw disables the signal, hence disabling the speed limiter.
BTW, just because that box is attached to the ECU doesn't mean its part of it or has some effect on its operation. It's obviously a factory piece, but it could be for anything.
I have absolutely no idea and never implied I did. I'm as curious as anyone to find out what it is.
Before you vent at me, you should consider the question asked, which was "what are the benefits of a J-spec ECU?" There are quite a few differences between US and J-spec ECU's, but there are no advantages to using it since the engines are basically identical in operation. Some have suggested the Japanese ECU's have more aggressive tuning to suit their higher-octane fuel, but I do not believe this is the case for cars of this age. Jap-import FC's and other Jap-import 80's turbo cars run without any problems on NZ's lower-octane fuel.
The differences between the ECU's are from the different equipment connected to it. Only US cars have AWS valves, EGR valves, shift-up lights and port air solenoid valves; only Japanese cars have speed limiters. It's quite possible the ECU's are physically identical, and only the firmware related to this equipment is different.
the ECU receives a speed signal from the speedo. Removing the screw disables the signal, hence disabling the speed limiter.
BTW, just because that box is attached to the ECU doesn't mean its part of it or has some effect on its operation. It's obviously a factory piece, but it could be for anything.
I know people can get into this "JDM" hysteria, where they simply must have "overnight parts from japan." But I'm curious to see if there could be some real benefit.
01-13-04, 04:41 PM
#14
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Originally posted by theloudroom
...because the two ECUs probably use different maps, for some people, the maps may work better.
...because the two ECUs probably use different maps, for some people, the maps may work better.
01-13-04, 07:09 PM
#15
Originally posted by theloudroom
I know people can get into this "JDM" hysteria, where they simply must have "overnight parts from japan." But I'm curious to see if there could be some real benefit.
I know people can get into this "JDM" hysteria, where they simply must have "overnight parts from japan." But I'm curious to see if there could be some real benefit.
01-13-04, 07:12 PM
#16
Originally posted by NZConvertible
Perhaps xfeastonarsex could do some before and after dyno or acceleration testing for us?
Perhaps xfeastonarsex could do some before and after dyno or acceleration testing for us?
01-13-04, 07:38 PM
#19
sorry about the fuzziness, crappy lighting. i can take some better ones this weekend if needed
ok this isnt working I keep getting:
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /newreply.php.
ok this isnt working I keep getting:
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /newreply.php.
Last edited by xfeastonarsex; 01-13-04 at 07:41 PM.
01-14-04, 08:43 AM
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Originally posted by xfeastonarsex
sorry about the fuzziness, crappy lighting. i can take some better ones this weekend if needed
ok this isnt working I keep getting:
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /newreply.php.
sorry about the fuzziness, crappy lighting. i can take some better ones this weekend if needed
ok this isnt working I keep getting:
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request POST /newreply.php.
are those wires connected to the ECU, or to somewhere else in the car?
01-14-04, 11:58 AM
#23
Originally posted by theloudroom
Hmm...that box definately looks like it does something,
are those wires connected to the ECU, or to somewhere else in the car?
Hmm...that box definately looks like it does something,
are those wires connected to the ECU, or to somewhere else in the car?
...
