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 VH45DE to Z32 Complete Wiring Integration DocumentFirst  < 1 2   Last
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Carl H
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4826 posts
1995 240SX SE RB20DET Powered!, 1995 Jaguar XJR...needs paint.
Charlotte NC
8-4-2003

 « 


i'd imagine it would consist of killing off 4 of the injectors, else it would bore wash the hell out of the engine.
also how are you going to deal with engine wear...this was a problem on the older cadilacs (i think) that had primitive displacement on demand...it would cut off the same 4 cylinders and it would wear the engine prematurely due to the pistons still acting as an air pump and not having combustion press the rings against the wall; bores got torn up and thus engines worn.

*edit*
here is a link discribing how chrystler did it, using electromechanical means...very cool stuff indeed.
http://www.allpar.com/mopar/new-mopar-hemi.html



SHift_BOOM. Damnit.
Doing an RB2X swap and scared of the wiring? Check out my thread in the RB section.
Now offering VH and SR/KA/CA conversions!
npez



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404 posts
1993 Nissan 300ZX Turbo (soon 2B twin-turbo 450ZX) 2002 BMW M3 2008 Honda Odyssey Touring (Mama)
Houston TX
8-30-2007

 « Re: VH45DE to Z32 Complete Wiring Integration Document (SuperHatch)


Quote, originally posted by SuperHatch »

Nick,

I'd be happy to host the PDF on my site. Just email any time you have an updated version and I'll change it within a day or so.


Thanks for the offer Steve. The problem I had is I retired one of our servers (I have a side business that requires several servers in a data-center rack we're leasing) and forgot to move the file from that one to another. I've fixed it now so it shouldn't be a problem any more.

Thanks again,
Nick.



1993 300ZX Twin-Turbo soon to be 450ZX Twin-Turbo (Oxford Gray)
2002 BMW M3 (Imola Red)
2008 Honda Odyssey Touring (Hey the kids have to ride somewhere!)

SuperHatch



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872 posts
07 Tundra, VH Powered S14, VH Powered 92 Slicktop Z32, 92 Q45 Beater
Manahawkin NJ
11-17-2006

 « Re: (Carl H)


Quote, originally posted by Carl H »
i'd imagine it would consist of killing off 4 of the injectors, else it would bore wash the hell out of the engine.
also how are you going to deal with engine wear...this was a problem on the older cadilacs (i think) that had primitive displacement on demand...it would cut off the same 4 cylinders and it would wear the engine prematurely due to the pistons still acting as an air pump and not having combustion press the rings against the wall; bores got torn up and thus engines worn.

*edit*
here is a link discribing how chrystler did it, using electromechanical means...very cool stuff indeed.
http://www.allpar.com/mopar/new-mopar-hemi.html

Thats exactly what I was getting at. The injectors are all powered off of the same power source, so putting in a simple switch to cut power to 4 isn't "simple" but can be done without too much trouble. The PTUs are powered independently but like you said, cutting power to one will wash out half the rings over time, not to mention the harmonics issues since this engine, as with most V8s, doesnt fire even-odd-even-odd.

I can't think of any other wiring harness mod that involves adding a switch that will randomly deactivate cylinders, but I guess I'm missing something.



- Stephen
http://www.godspeed-racing.com
Carl H
Bio-less Moderator



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4826 posts
1995 240SX SE RB20DET Powered!, 1995 Jaguar XJR...needs paint.
Charlotte NC
8-4-2003

 « 


the real trick would be to deactivate cylinders so that the engine still fires right, only way to do this would be to have a computer control that without user intervention...even then you still have the air pump problem.
making up an interceptor to do this isnt terribly hard but again the trick is the air pump problem.
Chrispy300



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279 posts
1993 J-Spec 300ZX 5 Speed Slicktop
Brisbane QLD, AUS
1-28-2008

 « Re: (Carl H)


Bumpity!

I can't download the pdf anymore Want's a password...

Fix or e-mail please?

Chris.



450ZX In The Works
Cheers,
Chris
npez



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404 posts
1993 Nissan 300ZX Turbo (soon 2B twin-turbo 450ZX) 2002 BMW M3 2008 Honda Odyssey Touring (Mama)
Houston TX
8-30-2007

 « Re: (Chrispy300)


Quote, originally posted by Chrispy300 »
Bumpity!

I can't download the pdf anymore Want's a password...

Fix or e-mail please?

Chris.


Sorry - had it in my staging environment which was subsequently secured. I've updated the link and it works now.....

Thanks & Happy New Year,
Nick.

Chrispy300



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279 posts
1993 J-Spec 300ZX 5 Speed Slicktop
Brisbane QLD, AUS
1-28-2008

 « Re: (npez)


Thanks a heap Nick, makes it a walk in the park

If your ever in Aus I'll shout you a beer or 10

SuperHatch



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872 posts
07 Tundra, VH Powered S14, VH Powered 92 Slicktop Z32, 92 Q45 Beater
Manahawkin NJ
11-17-2006

 « Re: (npez)


Nick,

Thanks again for this, I'll be taking a good look at it this week!

npez



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404 posts
1993 Nissan 300ZX Turbo (soon 2B twin-turbo 450ZX) 2002 BMW M3 2008 Honda Odyssey Touring (Mama)
Houston TX
8-30-2007

 « Re:


Thanks guys - I'm glad it helps out.... Steve got your voicemail and plan to call you back over the weekend - currently wrapping up a home remodel which has gone over by 2 weeks

Nick.

SuperHatch



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872 posts
07 Tundra, VH Powered S14, VH Powered 92 Slicktop Z32, 92 Q45 Beater
Manahawkin NJ
11-17-2006

 « Re: Re: (npez)


Quote, originally posted by npez »
Thanks guys - I'm glad it helps out.... Steve got your voicemail and plan to call you back over the weekend - currently wrapping up a home remodel which has gone over by 2 weeks

Nick.

No problem, no rush. I'm just trying to straighten out my PS setup and had a couple questions on the wiring. Besides that I'm almost up and running.

npez



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404 posts
1993 Nissan 300ZX Turbo (soon 2B twin-turbo 450ZX) 2002 BMW M3 2008 Honda Odyssey Touring (Mama)
Houston TX
8-30-2007

 « Re: Update


IMPORTANT UPDATE:
If you used version 2.5 of this document to build your harness, please download version 2.6 now as there were a couple of errors that have been corrected in this version. Thanks. Version 2.6 has been tested from start to finish with superhatch on his car and proves completely functional after the corrections identified were made. Thanks Stephen for your feedback and being patient as we worked through the issues on the phone.
KingNub



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69 posts

Melbourne Fl
7-22-2007

 « 


why isnt this a sticky?
also something like this for s chassis would be awesome and appreciated X_X
also awesome write up kudos and such
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