The ultimate VH FAQ

Discuss topics related to the VH41DE, VH45DE, VK45DE, and VK56DE engines.
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elwesso
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The thing you are referring to is the timing chain guides, same deal as the KA24 motors.... Just replace hte plastic guides with metal backed guides and youll be golden.

A new guide kit which includes all new guides, new oil pump chain, tensioners, etc is like $350. However, you can also scavenge the guides out of a 94-96 motor as the 94-96 motors had the updated guides. only 90-92 and some early 93s had the full plastic guides.

no one I know of has taken the VH45 beyond stock injectors under boost, which is about 450-475 HP, and it takes that like its nothing. Read the posts about that for more info, this motor can take a beating stock, its nuts!


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DeXteR
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fantastic reply! that's the kind of information i've been looking for since i got into this vh-thing i'm in now...

good to know about the us 96 vh45 being obd-II. and no vvt? wtf, mate?
elwesso wrote:you must be thinking about Z32/Skyline brake calipers...

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240 GTR
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i was thinking about doing the VH45 swap in my s13. VH motors are pretty hard to find in my area, so the internet is my main source for an engine.

so far, all i have found are JDM motors for sale. are there any differences between the jdm and usdm vh45s?

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gtrob
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240 GTR wrote:i was thinking about doing the VH45 swap in my s13. VH motors are pretty hard to find in my area, so the internet is my main source for an engine.

so far, all i have found are JDM motors for sale. are there any differences between the jdm and usdm vh45s?
Sorry If It has already been posted and I have missed it but can some one give the weight and dimensions for a VH45.

Nealoc187
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elwesso wrote:Low resistance and side feed, 12-14ohms is the spec.
just a tiny correction, they are high resistance (high impedence).

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irsa76
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gtrob wrote:
Sorry If It has already been posted and I have missed it but can some one give the weight and dimensions for a VH45.
I second this. VH engines are a little thin on the ground in Australia. I'm thinking about dropping one into my 720, since I can get a VH41 half cut cheaper then an S13 SR20DET halfcut.

tmorgan4
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MrPresidentQ45
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Anyone know what a VH41DE weighs? I'm giving some consideration to swapping an lsx motor into my 1999 Q and I'm trying to to see what suspension mods might be necessary (stiffer springs, etc.)

gs14racer
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LOL softer springs if anything, the aluminum lsx is about 100 lbs lighter than the vh.

PresidentV8Fan
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Out of curiousity, does anyone know if any Stand Alone could work on this engine? I remember hearing that no one has a Cam Angle Sensor or something to use with it - with so many people here we should be able to think of something

darinz
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I'm using an Autronic SMC and a CDI on mine. It is a bit limited on auxillary outputs but that is only problem is you want boost etc. Which I have. Currently I have the cams controlled by the only auxillary and just running standard wastegate for boost control. ie map pressure to wastegate. But I still get 2pi at 2k and 10psi by 3k so no real need for EBC.The Autronic has a disc that you put inside the CAS to make it work. Before the Autronic a had POS Link and that worked with the standard CAS but that was about the only thing in it that did work. IMO Link ecu are a waste of money!Mine stayed in for enough time time to put it on the dyno and work out that it couldn't do the job! I then ripped it out and ent it back due to isses they couldn't resolve.

Also 375 rwhp on stock injectors. ie about 500 to 535 hp.

Orphan
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A previous comment said that the 41 and 45 (was that talking about the VH or VK engines) have the same rod length and that the capacity differences come from the longer crank stroke. Can anyone verify this and also given that are the rods even different between the 41 and 45?

Has anyone compared the rods/pistons from a 41 and 45? Would be great to see some pics and actual specifications - if we are lucky the 41 might have internals to match the 45's strength ei 400rwhp with ease on a stock bottom end.

EDIT: does anyone have accurate measurements of these engines?

Also the Toyota 1UZ-FE 4L V8 easily handles 10psi+ and several cars are running around with 14.7psi+ daily so I don't see why the VH series wouldn't at least handle that as they appear to be a stronger built motor. For reference there is one guy in my city with a twin turbo 1UZ running 16psi+ and drives with 500rwhp daily on a stock bottom end - this might just be a good well maintained example that hasn't really been pushed but either way the engines are quite capable so if the VH was any less i'd be quite disapointed.
Modified by Orphan at 10:55 PM 12/9/2008

Orphan
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Lol awesome nobody replied

Just some food for thought. As the VH and VK apparently have the same bore spacing why not put the 5.6L Titan sleeves in a VH41/45. Get you a nice 98mm bore without having to spend that big on custom sleeves - that said I have no idea how much the sleeves through nissan would cost.

And for anyone interested in N/A a VH41 with that 76mm stroke and a bored out 98mm bore would be some fun seeing as with rods and pistons it could easily crack 8500rpm safely. As long as the parts are decent. Even at 10,000rpm its not even hitting a piston speed of 5000fpm (25.3m/s which is about the max you'd wanna run for any kind of engine life) which would put it at about right for the safe maximum of most decent pistons from my reading. With a good intake and exhaust etc I don't see why 450hp isn't quite possible if not more with some head work depending how the heads flow stock. Have a nice high revving V8 that rivals exotics :P well you can always hope haha.

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Raxephon
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Just realized the pic I posted above showing the motor stripped down has black skirts on the pistons.

None of the pistons that I've taken out or ordered from Infiniti have had the black skirt.

Anyone know what makes those in the pic above different other than being black?

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ISL33P
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Hi All

Can someone please clarify the differences in the vh45 engines series. I know the heads may be differnet but do you guys have a list of differneces handy ?

Just tryong to find the best one or maybe a hybrid of two different models, ie early block and late model head just as an example.

Thanks,Ariel

1991q45
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i have a question based on the vh45.

well it has been said that if you drive a vg30 with a bad injector it causes the rings or seals...something in the cylinder to start burning oil?does this also apply to the vh45?

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ISL33P
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....and also, does anyone have pics of the different chains guides, before and after the nissan recall ?

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Bronze MFP
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quick question, realavent to boosting the motor, does the vh45 have piston oil squirters built into the block?

YellowKoolAid
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does anybody know the thread size for the tranny - engine bolts....

the holes in the back of the engine where the bolts go through the tranny and connect to the engine...i need the thread size...

im nto sure how to properly word this so i hope you understand what i mean :D

im trying to put it on an engine mount but i dont have the proper size thread....ive looked around online and either im using the wrong words or its unavailable, thanks for the help

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Carl H
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no idea on the bolt size but they are 'weird' for what they are...they have a 17mm head on a super large bolt size it will be hard to find something in the aftermarket that is comprable.i'd say go to the dealer and get a set if it comes down to it.

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elwesso
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Theyre M14x1.25 I believe.. Extremely hard to find.. for my adapter plate i had to have them custom machined.

1briteyes
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I believe these bolts to be M14x1.5 and you are right they are not easy to get hold of.

My Question is.

What is the PCD and angular spacing of the Crankshaft bolts? VH41 VH45

I saw this posted once and have tried every search i can think of but no luck finding. I am using my VH41 as a mid engined and will be hooked up to an Audi 016 Transaxle. Also plan on fitting ITBs and have a couple of sets of a black top Toyota.
Modified by 1briteyes at 3:59 AM 4/22/2009

YellowKoolAid
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Infinite m45 also has the vh45 prob harder to find tho duno years

Thread size on the bolt is 1.5 diameter is 16mm length might be.70mm long not sure I had to buy 100mm long for the engine mount

Anybody got a complete list of hoses the engine uses? Radiator hoses and sizes and anything else I can't think/Dont know of? I'm having trouble findng this unformation anywhere else

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Carl H
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m45 used the vk45 not the vh45...difference in engines.

YellowKoolAid
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I've read the 06 uses a vh

Eh wiki says m45 shares the q45 engine but I guess not....

Got any info on the hoses for the vh?
Modified by YellowKoolAid at 7:25 AM 4/20/2009

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Carl H
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nope definately a vk45de.

Mountnman
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Hi

Are you discusing VH45DEinjectors. I am trying to locate flow rate of the standard A46=00 injectors installed in a VH45DE engine

Fackifiknow
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first post, lemme try and make it useful. Heres a few specs and whatnot..

1990 vh45de











*edit- images blow dogs for quarters so heres the links to the files in the order the images appear. http://www.mediafire.com/?jyuwdoxlyuw http://www.mediafire.com/?kthkooymnzj http://www.mediafire.com/?fvonzzmoydu http://www.mediafire.com/?ddzuntajnjy http://www.mediafire.com/?f3bb2hzntvx

Modified by Fackifiknow at 11:32 PM 9/8/2009
Modified by Fackifiknow at 11:38 PM 9/8/2009

zspeed10
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Mercedes benz wheel bolts are 14mm x 1.5...you could get a hold of those pretty easy. I'm holding one that is 45mm long and 22mm are threaded, FYI...

ynot
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most newer nissans' suspension bolts are the right size, maxima, altima, 350z, etc. control arm bolts. Not sure about length for the bellhousing to block, but they are holding my vh engine on the stand right now, so I do know the diameter and pitch is right.


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