No, thanks for you help. I think bullet answered my question. It basically won't work without a custom made manifold. Like I said I'm going to boost the car very soon and figured that bigger TB could benefit me. It looks like without getting a custom manifold made that i am left with porting the OEM TBs.

what are your thoughts on increasing the bore and shorting the stroke? I'll have a spare motor soon.

What is the objective .... not sure what benefit you are chasing.

I want a mean NA motor. Just toying with the idea, I know that alot of exotic cars make big power with larger bore and shorten strokes without the aid of forced induction.Is it feasible with out motors?

Look at our bore/stroke, do you really need to go more oversquare? Just get stronger lighter internals and better oiling . Then change everything else

We do them for $305. Thinned shaft and flat head screws installed to 63mm. Two maximas are that much?

does anyone know what the factory cylinder liner thickness is?

also has anyone fitted a vq40de 92mm crank?

You can go max 1mm oversize on the bore without sleeving the engine.

With Darton MID sleeves, you can get to 96-100mm bore and VQ40 crank will give you 4334cc's @ 100mm bore

VQ40 crank is in the Valkyrie Z34 on OEM bore with HR head conversion.

All this is in various previous threads.

I did do a search but not much came up regarding the vq40de crank, from your reply I'm assuming the crank is a straight forward swap into a vq37vhr block.

Yes, contact Bryan at Valkyrie - user "a.m. Brian" and/or search for the build thread on his race car (build was actually started by user Shamu).

One of the later threads is here
http://www.the370z.com/track-autocro...a-raceway.html

Best source of information is Clark Steppler at JWT who is an absolute mine of good information.

You will drop $20K into a 500hp (at the crank) VQ build though and it will be a race-spec engine that won't be very driveable as a street or daily vehicle and will probably require a stand-alone ECU.

There are a couple of other build threads on hi-HP NA builds (Megan370Z is one and 1Slow370Z is another), all chock full of good info.

Your other source is Sasha Anis in Canada . www.onpointdyno.com for details

The vq40 crank will not swap into the vhr, the bearing diameters are different as well as the flywheel height and the nose for the timing gears, the valkiryie motorsports car has a brian crower stroker.

Or let's start a funding website to dump money into a reputable company to learn what makes the impossible possible. Decoding the mystery into the vvel And maybe tuners could unlock respectable gains out of a NA build. Bigger displacement like gains or probably just need to stop imagining such non-sense.

2 maxima ones are cheaper than that

And a bigger TB's gonna bolt to the manifold how? When they're bigger you have an issue with the holes lining up. Also what's the size? Bigger also has an issue with the manifolds lip needing ported down so air doesn't hit that lip. Also how many TB's does a maxima have? One? Cause if it's only one that means on the Z you'll have to install one upside down or some how extend the wire harness to plug in. All this seems like a pain.

1slow370z did it. shoot him a pm, but he also had a custom manifold created to fit the TB's