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Rob Rojo
TryHard
NSW
Soarer TT

Posts: 304
Reg: 12-2007

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Friday, May 16, 2008 - 08:18 am, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I got mine from Ebay, The guy had bought it & never took it out of the box and bought a new car so did not want it anymore, it even included postage. I have seen a few around the same sort of money
check this one out its from the States so ask postage price first
http://cgi.ebay.com/ebaymotors/Greddy-E-manage-blue-BRAND-NEW-Supra-300zx-rx7-is300_W0QQcmdZViewItem QQcategoryZ33596QQihZ003QQitemZ130221481527QQrdZ1QQsspagenameZWDVW
Aaron Holland
Tinkerer
Tasmania
GTT

Posts: 37
Reg: 04-2007

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Sunday, May 18, 2008 - 03:47 pm, by:  Aaron Holland (Aholland) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

As Brian said, you will definitely know you've hit boost cut as you will be picking bits of broken teeth out of your mouth :-) Alright, not quite that bad, but my GT4 used to do it quite frequently.

Also, I don't think you will hit boost again at all until restarting the car if it was boost cut (again, that's what the GT4 did and I don't see why Soarers would be any different considering they were made at pretty much the same time) But then again, I might be wrong ;)
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 315
Reg: 12-2007

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Sunday, May 18, 2008 - 03:56 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

you can keep hitting boost cut until you lower boost or raise fuel cut.
Brian Timms
Goo Roo
New South Wales
TT Soarer Goodness.

Posts: 1220
Reg: 12-2006

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Sunday, May 18, 2008 - 04:14 pm, by:  Brian Timms (Turbo_brian) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Rob Rojo wrote on Sunday, May 18, 2008 - 03:56 pm:

you can keep hitting boost cut until you lower boost or raise fuel cut.




Or Snap a tail-shaft from the sudden jerks caused, not good to keep pushing it, it's violent for a reason, it's a safety feature which is only there if something isn't right, to keep on relying on it is dangerous both for your comfort and the car.

B.
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 316
Reg: 12-2007

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Sunday, May 18, 2008 - 04:22 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I did not mean its a good thing to be hitting fuel cut I just meant that it will keep hitting boost cut (which is a bad thing) until you actually lower boost or raise fuel cut.
Why would anyone want to drive around hitting boost cut?
If your tails shaft snaps from that it must have been pretty stuffed to start with, Its violent because there is no more fuel being supplied to the engine,
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 3470
Reg: 03-2006

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Sunday, May 18, 2008 - 04:42 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

No it actually over fuels and removes ignition..

IMagine having 15psi and no fuel? BYe bye motor !
Brian Timms
Goo Roo
New South Wales
TT Soarer Goodness.

Posts: 1223
Reg: 12-2006

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Sunday, May 18, 2008 - 04:54 pm, by:  Brian Timms (Turbo_brian) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

As Daniel said, it's voient because of no ignition (plenty of fuel though).

The theory behind the Toyota boost cut is when the stock system hits a certain percentage dutycyle on the injectors at the set 13.5PSI boost pressure, the system then immediately believes it's far enough into the safety net cycle to be too close and initiates 'boost cut', which fires the injectors to immediate 100% dutycycle and cuts the ignitnion spark for a 1 second period.

This means the cyclinders have ample fuel (cooling agent) but no spark.

This also means it will somehwat (stupidly small) compression lock, which aids to the massive jolt felt before power comes on.

I haven't snapped my tailshaft from boost cut, but until last week I had only felt it twice.

B.
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 317
Reg: 12-2007

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Sunday, May 18, 2008 - 06:52 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I thought it was fuel.
Even the HKS website is wrong!

The HKS FCD is an electronic device developed to properly raise the factory fuel cut level on factory turbocharged vehicles. As modifications are made to optimize engine performance, the factory fuel cut is often triggered by higher boost levels which activate a fuel delivery cut-off as a failsafe procedure. Symptoms of fuel cut are hesitation, bogging, and/or illumination of diagnostic indicators.
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 318
Reg: 12-2007

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Sunday, May 18, 2008 - 06:55 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Another website that is wrong
Fuel cut defender or Boost cut controller.
The stock ecu will initiate fuel cut when boost pressure reaches 1 bar for a 3 second period. In order to stop this, a device is needed in order to trick the ECU into thinking the boost pressure is lower. The Boost Cut controller or Fuel cut controller basically fools the ECU into thinking you are not running more than 1 bar of boost, though fueling by the ECU will stay the same for any level above 1 bar.
The HKS FCD is recommended for JDM as its a Map based system, and the Greddy BCC is recommended for USDM setups, which are AFM based but use a map sensor to determine Boost pressure.
Cihan Aday
Moderator
www.etuner.com.au
JZZ30

Posts: 2543
Reg: 07-2005

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Sunday, May 18, 2008 - 09:24 pm, by:  Cihan Aday (Cihan) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Brian Timms wrote on Sunday, May 18, 2008 - 04:54 pm:

The theory behind the Toyota boost cut is when the stock system hits a certain percentage dutycyle on the injectors at the set 13.5PSI boost pressure, the system then immediately believes it's far enough into the safety net cycle to be too close and initiates 'boost cut', which fires the injectors to immediate 100% dutycycle and cuts the ignitnion spark for a 1 second period.



Not sure where you got this info from.

When the 1JZ-GTE is concerned, Boost Cut and the Rev limiter run through the same circuit. Both cut fuel to the injectors, not ignition.

In normal powered situations there's nothing wrong with cutting power to the injectors completely under boost. As long as the injection timing is setup correctly (obviously it is from the factory if you've got std injectors) there is no fuel in the cylinder during the power stroke so there is no applicable 'air fuel ratio' or subsequent lean condition.

Rev limiters;
The 2JZ-GTE uses a hard ignition cut with 'drop' and 'return' parameters (to achieve a complete cut at predetermined RPM)
The VVT-I 2JZ-GTE uses a soft ignition cut. (timing retard and drops cylinders approaching a predetermined RPM)
Mustafa Akgul
Goo Roo
NSW
ToyoPartsMan

Posts: 1837
Reg: 07-2005

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Sunday, May 18, 2008 - 09:33 pm, by:  Mustafa Akgul (Muzzy) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I have never hit boost cut Probably due to the safc..
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 320
Reg: 12-2007

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Sunday, May 18, 2008 - 09:53 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Your not trying Hard enough!
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 3473
Reg: 03-2006

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Sunday, May 18, 2008 - 09:55 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

My Bad then, I knew A JZ engine used ignition cutting out... thought it was 1J.. Seems its 2J.

Sorry Rob.
Mustafa Akgul
Goo Roo
NSW
ToyoPartsMan

Posts: 1839
Reg: 07-2005

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Sunday, May 18, 2008 - 10:04 pm, by:  Mustafa Akgul (Muzzy) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Rob Rojo wrote on Sunday, May 18, 2008 - 09:53 pm:

Your not trying Hard enough!




hahaha not so mate I seen 20 psi on my old stockies when i set the avcr wrongly.. how much harder do i need to go before it hits boost cut?
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 321
Reg: 12-2007

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Sunday, May 18, 2008 - 10:07 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Now thats trying too hard!
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 3474
Reg: 03-2006

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Sunday, May 18, 2008 - 10:23 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I hit it... After the 2nd effort and i worked out what it was.. I got a FCD straight away,lol!
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 322
Reg: 12-2007

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Sunday, May 18, 2008 - 10:50 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

This is from the 2jz-gte manual about fuel cut. (It basically explains how to test it)

application/pdfUpload
SFI System - 2JZ-GTE.pdf (46.6 k)
Anuradha Vithanage
TryHard
NSW
2JZ-GTE

Posts: 127
Reg: 03-2007

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Monday, May 19, 2008 - 06:43 pm, by:  Anuradha Vithanage (Lankanrascal) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

How much are FCD normally? i might invest in one while i get some money together for an ecu.
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 325
Reg: 12-2007

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Monday, May 19, 2008 - 07:25 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Are you selling yours Daniel now you have the EMB?
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 3482
Reg: 03-2006

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Monday, May 19, 2008 - 08:51 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I got rid of mine last year when i got the Blitz ecu :-)
Rob Rojo
TryHard
NSW
Soarer TT

Posts: 328
Reg: 12-2007

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Monday, May 19, 2008 - 09:09 pm, by:  Rob Rojo (Rob_tt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

You can get them off Ebay for around $100.
Daniel Clarke
Goo Roo
NSW
TT 2.5L 6 cylinder

Posts: 3486
Reg: 03-2006

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Tuesday, May 20, 2008 - 11:04 pm, by:  Daniel Clarke (Dieseltrain) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

YOU should be able to get a Greddy BCC for that price landed from Greenline.
Anuradha Vithanage
TryHard
NSW
2JZ-GTE

Posts: 129
Reg: 03-2007

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Thursday, May 22, 2008 - 03:08 pm, by:  Anuradha Vithanage (Lankanrascal) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I think I might just hold off and go buy an emanage blue soon. I don't have much more plans other than adding a boost controller as well.

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