stock injector size

Discuss topics related to the VH41DE, VH45DE, VK45DE, and VK56DE engines.
ka-t4u
Posts: 241
Joined: Tue Oct 02, 2007 9:56 am

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hi everyone, i did search but i would like for someone to please confirm my findings, i found out that the vh45 has 370cc injectors, is that correct? reason i am asking is because i own a ka24de that i am planning on boosting and those injectors would suffice my needs and there is a 91 infinity q45 at my local u-pull and i was wondering if i could use those? in such a case i would of course test them first and i would also have 8 possibilities of good ones when i only need 4, thank u guys so m,uch for your time, have a happy thanksgiving!

Thanks!


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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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cant use those injectors in a twincam ka rail...have to use q45 injectors from a 94.5-96 car.different designs...dont waste your time.

ka-t4u
Posts: 241
Joined: Tue Oct 02, 2007 9:56 am

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Why cant i use them? would u mind to please give me a further explanation?? please? where is the different design is it in the size?

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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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they physically will not fit into the rail, nissan changed rail and injectors midway thru production run.that and you really dont want those injectors anyways as they have a tendency to fail...not too too bad on an na car but horrible on a boosted car.

ka-t4u
Posts: 241
Joined: Tue Oct 02, 2007 9:56 am

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well thank you so much for your time and i guess this thread can be deleted then to save up some room! thank u so much and happy thanks giving

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SSDwellah
Posts: 306
Joined: Tue Nov 12, 2002 9:45 pm
Car: '90 Z32 Coupe w/ VH45DE + 5-speed (FOR SALE)
'06 Infiniti G35 Coupe 6MT
'08 Frontier 4x4 SE KC

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Carl H wrote:they physically will not fit into the rail, nissan changed rail and injectors midway thru production run.that and you really dont want those injectors anyways as they have a tendency to fail...not too too bad on an na car but horrible on a boosted car.
For more info on the failures see this link:

http://www.jimwolftechnology.c...E.pdf

I think that JWT also used to have a doc which showed all of the Nissan injector connectors (some are rectangular and the newer style have rounded corners). Anyway, can't find it, but it's all been covered before: the injector connectors are different, the manifold holes are different, the materials are different (early style seem to fail prematurely in the presence of ethanol and other additives), the wiring uses was different (though this is a function of the car, there's nothing stopping you from putting a relay in the early style car so that the injectors are only "live" when the key is on)



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