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Location:
Hobart, TAS
Registered:
October 2004
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7M-GTE ECU's
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Tue, 16 November 2004 02:39
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Would there be any difference between an 7M ecu attatched to an Auto box and an 7M ecu attatched to an Manual box?
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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: 7M-GTE ECU's
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Tue, 16 November 2004 02:41
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Don't think so. I'm running an auto 7M ecu on a manual box. Just a matter of shorting the neutral start switch and you're up and away. Runs just like its meant to.
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Location:
tas
Registered:
June 2002
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Location:
Brisbane
Registered:
May 2002
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Re: 7M-GTE ECU's
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Tue, 16 November 2004 06:12
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The ECU doesn't control boost on 7M's.
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Location:
Hobart, TAS
Registered:
October 2004
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Re: 7M-GTE ECU's
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Tue, 16 November 2004 07:16
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ah, so what does control the boost then on a 7M? Becuase dosnt the TCCS system run the car in safe mode after about 14psi?
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Location:
tas
Registered:
June 2002
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Re: 7M-GTE ECU's
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Tue, 16 November 2004 10:31
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Ok norbie, then perhaps it's not the ECU that cuases the difference in boost. But in the TSRM it lists the stock boost readings as:
MT 5.5-7.5 PSI
AT 4.8-6.0 PSI
Is it all in the wastegate? got me stumped if it's not the ECU.
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Location:
Brisbane
Registered:
May 2002
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Re: 7M-GTE ECU's
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Wed, 17 November 2004 00:11
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Yes it's all pneumatically controlled.
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Location:
Hobart, TAS
Registered:
October 2004
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Re: 7M-GTE ECU's
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Wed, 17 November 2004 01:11
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Hmm, sweet as. Well thats good news then. The boost can easily be changed without the need of an aftermarket ECU, although not very high without bumping into fuel problems.
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Location:
tas
Registered:
June 2002
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Location:
Brisbane
Registered:
May 2002
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Re: 7M-GTE ECU's
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Wed, 17 November 2004 02:22
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As I said, the boost is pneumatically controlled. The gearbox has nothing to do with it. If the manual cars run slightly more boost, they must have a slightly stiffer wastegate spring. This doesn't really make any difference when you install a bleed valve though.
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Location:
Hobart, TAS
Registered:
October 2004
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Re: 7M-GTE ECU's
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Wed, 17 November 2004 04:40
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Thanks for that guys, I now have a clearer understanding of this whole matter.
But one other thing. Where does the ECU measure boost? or that just dosnt matter and then where would you install a boost guage in to record readings of boost? from the Wastegate or from the Inlet plumbing and b4 or after the AFM? sorry so many questions
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Location:
Brisbane
Registered:
May 2002
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Re: 7M-GTE ECU's
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Wed, 17 November 2004 05:52
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The ECU does not measure boost. A boost gauge should be attached to the plenum.
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Location:
tas
Registered:
June 2002
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Re: 7M-GTE ECU's
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Wed, 17 November 2004 10:06
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what your saying norbie makes alot more sense, and fly's in the face of what i've been reading on www.supraforums.com where the yanks say the manual ECU runs more boost.
Puts a new spin on buying second hand CT26's now.
anyway i'll leave the boosting of my 7mgte engine to you negative  (will have that 1jz real soon)
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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: 7M-GTE ECU's
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Wed, 17 November 2004 12:43
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Meh.. bleed valves are the way to go. Just get a good one that wont spike. Turn it up till you hit fuel cut. And beleive me, when u hit fuel cut, you definitely feel it. After that, tone it down till it doesnt. Yay 
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Location:
Hobart, TAS
Registered:
October 2004
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Re: 7M-GTE ECU's
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Thu, 18 November 2004 02:10
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lol, thnx guys. Cant wait till i have some boost! Thnx again
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Location:
Adelaide
Registered:
July 2002
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Re: 7M-GTE ECU's
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Thu, 25 November 2004 09:11
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ive got a prob with my 7m boost
when my car starts boostin around 5psi, the engine cuts out and thew check engine light comes on
i checked the fault codes stored in the ecu and i got a code 34, abnormal boost pressure. how can it know this if it has no sensor? or do i have a pooped AFM or fuel pump or something?
i used to run 11psi with no worries.
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Location:
tas
Registered:
June 2002
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Re: 7M-GTE ECU's
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Thu, 25 November 2004 09:29
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boost leak maybe? check your pipes for leaks.
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