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Location:
Sydney
Registered:
February 2003
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manual vs. auto std ecu's
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Thu, 16 October 2003 11:26
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situation:
1jzgte or 2jzge into ma61 using w58
question:
what are the advantages of using a manual factory ecu compared to an auto ecu? is it worth spending extra to get a manual ecu?
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Location:
Wollongong
Registered:
May 2002
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Re: manual vs. auto std ecu's
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Thu, 16 October 2003 11:38
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The auto ECU versions will retard timing when it thinks it's changing gear, lowering power output ever so slightly.
M/T versions don't do this.
(Based on 1JZ-GTE ECU knowledge)
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Location:
Sydney
Registered:
February 2003
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Re: manual vs. auto std ecu's
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Thu, 16 October 2003 11:39
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so there isnt a huge difference
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Location:
Brisbane
Registered:
May 2002
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Re: manual vs. auto std ecu's
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Thu, 16 October 2003 13:41
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I've heard this said as well, but the ECU will never think it's changing gears when there's no auto transmission present. 
Some say the manual ECU is better, but I've yet to see a back-to-back comparison so I don't know if it's true or what the difference actually is.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: manual vs. auto std ecu's
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Thu, 16 October 2003 13:42
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Apart from the obvious problem of some ECU's going into limp home mode without the auto present. Take the example of Draven's car, ran fine with the manual ECU but ran limp home mode with the other.
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Location:
Southern Sydney
Registered:
August 2002
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Re: manual vs. auto std ecu's
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Fri, 17 October 2003 21:04
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| justcallmefrank wrote on Thu, 16 October 2003 23:42 |
Apart from the obvious problem of some ECU's going into limp home mode without the auto present. Take the example of Draven's car, ran fine with the manual ECU but ran limp home mode with the other.
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still went hard though.
I think it ran supper rich too though.... like they run rich in the first place but more so.
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Location:
Sydney
Registered:
February 2003
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Re: manual vs. auto std ecu's
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Sat, 18 October 2003 03:02
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yeh i was still super impressed with it in limp mode
ooo baby was i! 
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: manual vs. auto std ecu's
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Sat, 18 October 2003 11:46
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Its got a 1JZ, its bound to go hard, even when not running to potential!
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Location:
Adelaide
Registered:
September 2003
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Re: manual vs. auto std ecu's
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Sun, 19 October 2003 22:14
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Draven, (or anyone for that matter)
Anyone had experience converting from an auto to manual ? 
I'm about to do it, and would appreciate some help on specifics of running without Auto Trans ECU 
Cheers
Michael B
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Location:
Wollongong
Registered:
May 2002
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Re: manual vs. auto std ecu's
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Mon, 20 October 2003 01:58
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Gimme a few weeks and I'll be able to tell you. Soarer 1JZ-GTE auto to manual conversion is about to begin!
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: manual vs. auto std ecu's
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Mon, 20 October 2003 03:57
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| bbaacchhyy wrote on Mon, 20 October 2003 06:14 |
Anyone had experience converting from an auto to manual ?
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On the other hand, it doesn't seem to have been a problem at all in Norbies car...that thing is a machine...
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Location:
Adelaide
Registered:
September 2003
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Re: manual vs. auto std ecu's
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Mon, 20 October 2003 04:35
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Norbie,
Can you please provide some help in dispensing with the A340E and transplanting the W58, in terms of disabling the Auto Trans computer, specifically avoiding the 'limp home' mode scenario ?
As a mechanical person, I'd love nothing more than the correct response of ".... just cut the loom and throw the computer away.."
Cheers
Michael B
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Location:
Brisbane
Registered:
May 2002
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Re: manual vs. auto std ecu's
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Mon, 20 October 2003 06:25
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The Aristo doesn't have a separate computer for the auto; it's integrated into the engine ECU. I simply disconnected the plugs on the auto trans, unbolted it and replaced it with a W58. I was expecting problems with this approach, but everything ran perfectly without a hitch! I had the W58 speed sensor connected to the computer for a while, but I have since removed that with no ill effects.
Note that there are vast differences in the electronics between different cars with JZ engines, so the above may not apply to anything other than a JZS147 Aristo.
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Location:
Adelaide
Registered:
September 2003
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Re: manual vs. auto std ecu's
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Mon, 20 October 2003 06:27
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Cheers Norbs, I'll give it a go and see what happens
Not holding my breath tho' as it sounds too easy
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Registered:
March 2003
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Re: manual vs. auto std ecu's
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Mon, 20 October 2003 08:37
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make sure the transmission selector is set to park when youre doing the conversion (if using the auto ecu) or the car wont start when youve finished and you'll be scratching your head trying to work out why.
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