Best year Vh45de for swap

[NightRyderNy]

So If I dont really post much because I would rather read and research. My question is what year (years) vh45de engines are the most appropriate for a swap into an S14? I have been searching around but have not really seen any post with a clear answer. There is a junk yard near my house with a clean motor out of a 94 and the car was totaled from the rear (no jokes please lol ) So if anyone can point me in the right direction so that I may slowly being my project. Thanx in advance

[qsiguy]

I'd go for the'94. No guide issues to worry about and it's just newer. I think there are some other advantages but I can't think of them at the moment. Plus it's just newer. If you have the engine out anyway and will be replacing parts bringing it up to spec then the guides don't really matter I guess since you can just replacement anyway.

Anyway, I'd say '94.

[Raxephon]

Newer style injectors, oval intake ports on the heads (earlier models used siamese ports).

And a neat little trick you can do with the ones without VTC is to add the intake cams, ECU, a few wires, and the upper front covers from an earlier VTC VH45DE for a little extra "oomph".

[tmorgan4]

I don't believe the new injector style appeared until '95. Swapping over the VTC parts onto a '96 engine would be a great idea for anyone trying to keep the OBD2 connection.

[Raxephon]

I don't believe the new injector style appeared until '95.

My newest Q45 is a 6/93, essentially a '94 and it has the newer style injectors, OBD 1, oval intake ports, metal-backed chain guides, and no vtc.

EDIT: My motor has VTC, sorry for the misinformation.
Modified by anlasak at 6:28 AM 6/5/2008

[hannibal]

^ No VTC?? *scratches head*

[tmorgan4]

Interesting combo. I was basing my info off the Deatschwerks website and it shows the Phase II injectors as 95+.

[SuperHatch]

My newest Q45 is a 6/93, essentially a '94 and it has the newer style injectors, OBD 1, oval intake ports, metal-backed chain guides, and no vtc.

If that's the case I'd say your motor has been replaced at some point in the cars life with a 96 motor.

The 94+ motors also have better ignitor chips. The front upper timing covers have neat little access cutouts to allow you to get a socket on the cam bolts without pulling the upper front cover, which is convenient for maintenance or upgrades. The valve covers are studded instead of bolted which is nice, and they have valve cover gaskets instead of RTV, which is also nice. There were a lot of design improvements made in the 94 year.

The only downside I can say to the later motors is the main bolts. The 90-93 motors have studded mains.

[npez]

Interesting combo. I was basing my info off the Deatschwerks website and it shows the Phase II injectors as 95+.

I've got the 94 motor - it seemed to me like a lot of evolutionary improvements were made in that year - as mentioned earlier. I don't mean to hijack the thread - but do we have a definitive answer on the injectors? I have brand new nismo 555cc injectors that were intended for me 93ZTT and want to make sure that they will work on the 94 VH45. The injector connectors look a little different than what I had on my Z (though the VH connectors look like they'll plug into the 555s) but wasn't sure how you can determine if you have the newer style injectors (which BTW also started in 94 on the Zs not sure if Nissan did this across the board) or the older style.

Please advise and thanks.

Nick.

[npez]

I've got the 94 motor - it seemed to me like a lot of evolutionary improvements were made in that year - as mentioned earlier. I don't mean to hijack the thread - but do we have a definitive answer on the injectors? I have brand new nismo 555cc injectors that were intended for me 93ZTT and want to make sure that they will work on the 94 VH45. The injector connectors look a little different than what I had on my Z (though the VH connectors look like they'll plug into the 555s) but wasn't sure how you can determine if you have the newer style injectors (which BTW also started in 94 on the Zs not sure if Nissan did this across the board) or the older style.

Please advise and thanks.

Nick.

Correction - the change on the Zs happened in 95 not 94 as I mentioned above. So if Nissan made this move across the board, 95 may be correct as tmorgan mentioned.....

Thanks,Nick,

[SuperHatch]

Correction - the change on the Zs happened in 95 not 94 as I mentioned above. So if Nissan made this move across the board, 95 may be correct as tmorgan mentioned.....

Thanks,Nick,

I have a 94 VH, it has square injectors just like my 91, 92, and 93 motors...

[npez]

I have a 94 VH, it has square injectors just like my 91, 92, and 93 motors...

Awesome! That means my TT 555cc Nismo's should work just fine in my 94 motor. Now I just need to find 2 more to have a full set of 8.

Thanks for the info.

Nick.

[ScottJackson]

The newer VH also had VVT, it was just a different design that didn't stick out from the front of the valve cover like the earlier type. So yeah, the '94 is a good one compared to the 90-92 because it has the updated guides. Oh, and it's newer.

[SuperHatch]

The newer VH also had VVT, it was just a different design that didn't stick out from the front of the valve cover like the earlier type. So yeah, the '94 is a good one compared to the 90-92 because it has the updated guides. Oh, and it's newer.

USDM 90-95 VH45DE has VVT and 97+ VH41DE has VVT, but the 96 VH45DE does not have VVT. All foreign market VH motors have VVT. The 96 is the bastard child in the US.

[maxnix]

I don't believe the new injector style appeared until '95.

The rotary injectors and oval ports appeared in 1994 MY.

SupeHatch nailed the VVT issue.

What's always been intriguing to me is that the later JDM VH45DE (1996 2002) must be OBD II.

[SuperHatch]

The rotary injectors and oval ports appeared in 1994 MY.

The rotary injectors appeared in 95, and I'll stand by that.

What's always been intriguing to me is that the later JDM VH45DE (1996 2002) must be OBD II.

Why? Nothing in Japan was OBD-II regulated.

[Carl H]

since we're on the subject...are the later injectors drop in compatible for the earlier year engines or is it like the z32 which required different rails?

[tmorgan4]

Carl....The later phase 2 injectors can be adapted to fit the early fuel rails. Deatschwerks sells an adapter kit that includes new injector caps, 8 pigtails, longer bolts, an adapter that fits on the end of the injector, and spacers to lift the new injector caps a little higher.

It's a very well made adapter kit. I inquired about whether I could just switch to the phase 2 fuel rails and avoid the adapter kit but they said it would require machining on the underside of the plenum. The injector harness I bought with my engine was super brittle and in rough shape so I just replaced it with an injector harness from a later engine with the updated injectors.

Nick....Those Nismo 555s use the square/rectangle connectors? I thought all the Nismo injectors used the oval connectors like on the phase 2 Q45 injectors. Learn something new every day.



I still have the pigtails in case anyone needs them.

[npez]

Yes, my nismos are for model year through 94 the 95- are different. I haven't taken them out of the box yet but this is what they should look like (they're a drop in replacement no fuel rail, etc. adaptation required)

http://us.st11.yimg.com/us.st....69594

Thanks,Nick.

[elwesso]

I think there must be some conflicting info somewhere. All 94s have the newer injectors and VVT (as stated). Ive NEVER seen a 94 motor with early injectors, however id not rule out the possibility that they exist!

[npez]

I think there must be some conflicting info somewhere. All 94s have the newer injectors and VVT (as stated). Ive NEVER seen a 94 motor with early injectors, however id not rule out the possibility that they exist!

Ok - now it's about as clear as mud Is there a way visually to differentiate between the 2? I have my 94 motor on the engine stand. I need to make sure I don't buy 2 more Nismo 555cc injectors to find out the first 6 weren't the right ones.

Now I know superhatch has several motors and he stated that all the injectors are the same across 91,92,93, and 94. Elwesso where did you get your info?

Please advise and thanks a bunch.

Nick.

[npez]

I think there must be some conflicting info somewhere. All 94s have the newer injectors and VVT (as stated). Ive NEVER seen a 94 motor with early injectors, however id not rule out the possibility that they exist!

I did some searching around to try to figure out what may be going on.

According to infiniti parts there are 3 part #s for injectors 92-93,94,95-96.

According to some posts here on NICO:zerothread?id=214756http://forums.nicoc ... ead/329653

Here's what I've surmised and it matches the part# findings.Up to 1993 the injector design was side-feed pintleIn 1994 the injector design went from side-feed pintle to side-feed rotary.In 1995 the injector design changed again from side-feed rotary to top-feed rotary

Could this be the conflicting information we're having? Just a stab in the dark, but I still want to make sure that my 555cc nismos will work before buying 2 more to complete the set for the VH.

Please advise.

Thanks,Nick.

[elwesso]

There is NO SUCH THING as a top feed injector on a VH45DE! Ive seen about every year in the G50 lineup and thats it!

[npez]

There is NO SUCH THING as a top feed injector on a VH45DE! Ive seen about every year in the G50 lineup and thats it!

It was just a stab in the dark based on info on NICO - well that blows that theory out of the water

So in your experience are there any physical indicators that denote a phase 2 from a phase 1 injector (i.e. colors, markings, lack of markings, etc.)? My injectors are a tan color and I've taken the cap off one and can see some part #s but that about it. I googled the part #s to no avail.

It really will be nice if we can get to the bottom of this and determine the model year demarcation point between injector types. Any idea why the part #s would be different for 92-93,94,95-96? Is it electrical differences or something else?

Please advise.

Thanks,Nick.

[elwesso]

You can tell many ways. if the injector is out, the early ones have a single pintle on the bottom whereas the later ones look different..

however, the easiest way is to check the connectors. Early ones all have the square connectors (with the metal band as the clip), new ones all have the round connectors (with a button clip)...

There arent any electrical differences to my knowledge. They all have the same base resistance value. They may be constructed differently, but they work the same, except for the pintle vs rotary disk.

[npez]

ok as pictures speak a 1000 words here's my 2000 word contribution. I found 2 pictures of bosch injectors for the q45.

Style 1 (Like the ones I've got in my 94) - notice the 2 indentations in front of the base of the connector.

Style 2 - notice no indentations in front of the base of the connector.

Now for the interesting tid bits:

Style 1 supposedly has this fitment:1993-1996: 8Cyl 4.5L A1993-1996: 8Cyl 4.5L Base1994-1996: 8Cyl 4.5L T

Style 2 supposedly has this fitment:1990-1994: 8Cyl 4.5L Base1991-1994: 8Cyl 4.5L A1994-1994: 8Cyl 4.5L T

According to this there are overlapping years and trim differences. I am now more confused than when I started.

Does anyone have any definitive information on fitments?

Please advise and thanks in advance.

Nick.

[Carl H]

this is pretty typical of nissan, they'll change things on some years but not others.my guess is that they had some engines prebuilt already and used that stock before switching over to the new design...that would explain the overlap.basic rule of thumb is if what you pull out looks like what you're putting in then you'll be fine.if the injectors in your motor are oval connectors and the ones from your z are oval as well then it is a plug and play application.

[npez]

You can tell many ways. if the injector is out, the early ones have a single pintle on the bottom whereas the later ones look different..

however, the easiest way is to check the connectors. Early ones all have the square connectors (with the metal band as the clip), new ones all have the round connectors (with a button clip)...

There arent any electrical differences to my knowledge. They all have the same base resistance value. They may be constructed differently, but they work the same, except for the pintle vs rotary disk.

I think our posts crossed paths I see what you mean about the connectors though. My Nismos are the square connector type for 90-94Zs with the metalic U clip - do you think there will be any fitment issue getting them into the VH with the phase II injectors? I don't mind taking the injector connectors off the Z harness (the harness is practically brand new - but hacked up to adapt to the VH conversion) and fitting them on there but if the injectors are physically different (I read somewhere on NICO about shimming, etc.) then I would rather try to work with Z1 to swap them for the newer style Nismos.

Please advise.

Thanks,Nick.
Modified by npez at 3:20 PM 5/28/2008

[tmorgan4]

Nick,

Since you've got those earlier injectors (with the square connectors) they aren't going to be a direct drop in when dealing with a "phase 2" (oval connector) fuel rail. The phase 2 injectors are a good amount narrower towards the bottom so phase 2 injectors will fit in a phase 1 rail with the adapter kit, but they can't be adapted the other way.

My suggestion to you since you've already got 6 Nismo 555s with the square connector is stick with them and use a phase 1 rail. There are no differences in the mounting of the rail that I'm aware of, so it should bolt right in.

[elwesso]

Nick,

Since you've got those earlier injectors (with the square connectors) they aren't going to be a direct drop in when dealing with a "phase 2" (oval connector) fuel rail. The phase 2 injectors are a good amount narrower towards the bottom so phase 2 injectors will fit in a phase 1 rail with the adapter kit, but they can't be adapted the other way.

My suggestion to you since you've already got 6 Nismo 555s with the square connector is stick with them and use a phase 1 rail. There are no differences in the mounting of the rail that I'm aware of, so it should bolt right in.

Agreed thats probably going to be your easiest route. Finding an early fuel rail shouldnt be a big deal.