VH45 & VK45 blocks the same ??

[Mettler]

I read a post on another forum by a user 'Zgringo' stating that the VH & VK blocks are the same, with different heads.

Quote »Without beating the horse to death, I'd like to add some information here.SR20DEN is correct. There is no such thing as a VQ V8 Nissan or Infiniti engine. The VH and VK engines are on the same block but the VK has different heads than the VH. Difference being valve material and port design. By putting VK heads on a VH engine you'll gain 62 HP. Not a bad upgrade.The VH45DE engine is 501 lbs, which is 100 lb. lighter than a VG30DETT engine in a 300ZXTT. The width of the VH45DE engine is the same as both the 350 and 300Z engine, only longer.The VH45DE engine with VK45DE heads will have 340 HP and with a good free flowing exhaust and decent cold air intake will produce 400+HP. Now that my friends is with a N/A engine. Now by adding a rear TT setup with 8# boost you'll be looking at 600 HP, with tons of torque. Now thats what you'd call one bad *** car. Is it possible to make such a swap? YES. I know of 3 350Z's right now running around now with this swap. Plus some 300ZX's and a few 240 and 260Z's.Infiniti didn't choose this engine as it's platform for building the A35 Indy engine for no reason.As for after market parts for this engine, lots of them.[/quote]Now... after reading much information on Nico, I was under the impression the VK is a completely different engine, based on the VQ architecture... meaning the blocks can't be the same. I've never heard anyone else say this.

Anyone want to clarify this for me ? And perhaps, set Zgringo straight ?

http://www.automotiveforums.co...age=2

[David Steele]

Well I measure 475 with some missing stuff on it 501lbs with what on it? BS weight .

[defrag010]

yeah ok.. 400 horsepower with intake/exhaust.. talk about rolling my eyes.

This guy sounds like he honestly has no clue and is just regurgitating some daydream info he heard from some tuner on another message board. I wouldn't take him serious at all. What he's saying is like saying a gen1 350ci chevy small block is the same as a 346ci ls1 because they are both chevy and are both the same size.
Modified by defrag010 at 6:42 PM 8/7/2006

[Mettler]

Man I thought it was a bunch of horsesh1t, the pics I've seen of the VK engines look way different... and they look smaller & not as strong.

I don't know where people get off spouting theoretical nonsense like that as fact, seems like the guy is just assuming it to be true. Pity the thread's locked, I'd sign up and give him the what's up ! :p

[defrag010]

it's automotiveforum.. that's a breeding ground for internet misconstuers and regurgitators. They thought it was a VQ45 at first.. lol!

[hannibal]

I might be showing my noobness, but it thought the VK had an aluminum block. I assume it was a new design, but just had the same bore/stroke.

[Mettler]

Well the VH engines have an alloy block, so no reason the VKs wouldn't... the guy there is trying to say they have the same block though.

[unclejoe]

Pardon my intrusion, but the VK is a newer stronger design than the VH (with additional strengthening between the cylinders, etc.). Anyone who says different is a liar or a fool. I've been told it's lighter than a VH, but haven't weighed mine yet. It even looks 100% different than the VH (although the engine mounts and bolt-on for the flywheel are the same as even a V32). The intake, heads and exhaust are especially different looking, and the starter is on the other side from the VH. The water pump/fan drive is particularily hokey, but we'll be bypassing that little mess. I haven't procured one of the new dual throttle bodies yet, but that's another "stock" major horsepower enhancement (although a 340hp to 360hp stock single throttle body engine is significant!). No idea what we're dealing with in the ECU area yet...

Looking forward to anything anyone else can add!

rockon!

jb

[Mettler]

Good post, but just a quick note, the starter has appeared on both sides of the VH engine, depending on which type and what country the vehicle is from.

[maxnix]

Pardon my intrusion, but the VK is a newer stronger design than the VH (with additional strengthening between the cylinders, etc.). Anyone who says different is a liar or a fool. I've been told it's lighter than a VH,

I seriously doubt a lighter open deck design is stronger than a closed deck design.

And don't be fooled by 340 hp/360 hp ratings of VK45DE/DD. Different rating system is only difference.
Modified by maxnix at 7:55 AM 5/12/2007

[riu]

i dunno... albert (zgringo) has been fairly credible in the past, i know he's swapped a VH45 into a Z32, but i don't know many details about it, other than he's trying to set a land speed record with it, and that he's American but living in Mexico.

has anyone else taken apart a VK as well as the VH to compare them?

[sijoko]

H

Pardon my intrusion, but the VK is a newer stronger design than the VH (with additional strengthening between the cylinders, etc.). Anyone who says different is a liar or a fool.

Looking forward to anything anyone else can add!

Here is a pic of the VK engine.
Modified by sijoko at 2:04 PM 8/16/2006

[sijoko]

Here's a view of the block with the strengthening ribs.

[sijoko]

Finally here is a pic of the VH45DE disassembled. As you can see, the VH has strengthening ribs and a thicker block than the VK. The VH also has a girdle that ties all the bearing mains together. You can see it partially in the top right of the photo next to the oil pan.

[maxnix]

And here is the VH45DE in all its over designed glory.

It should be noted the engine closest in design to the VH45DE is the current closed deck Porsche V8. And we know what it does turocharged.

http://nissaninfiniticlub.net/...t/all

[nissanbrute]

Ok, i have a 240 and i was thinking about putting a v8 in it, but i cant decide. I need something that wont effect the handling to much, but give me the power i need to burn some rubber, anyone have an idea on what kinda engine should be installed, i am looking at 400 total horsepower,

[gammer_ghn]

ok i had one question can u put the 300zx's TT on a VH41 i know the name is VH45 but i have a 1999 Q just wondering dont make too much fun of me

[Mettler]

You can fit pretty much any turbos to any engine provided you have a suitable exhaust/turbo manifold/s for the setup.

In this case, you couldn't use the V6's manifolds on the V8 for obvious reasons.

Furthermore, the turbos would be well undersized for the significantly higher volume of air/exhaust that a VH flows, so wouldn't really be suitable.

Twin turboing a VH engine is always going to be a completely custom exercise with plenty of fabrication involved. If you need more information, check out Canadiandrifter240sx'es thread on his build, that's what he's doing.

[gammer_ghn]

Yes sir well im too broke for all of that my friend he totalled his 300zxtt from the back and the front and only the turbos and some engine parts are still kinda good after rebuilding so i was wondering if the set up fits the Q since u can drop the motors in with a little fabrication but i guess thats just how it is for the Q thx man!!!