N/A build

Megan370z

that 68mm is the outside mesurement pretty much on the intake manifold inlet.
I wouldnt go more than 65mm....
keep it mind, its plastic.

I spend 10$ on the 2 adapter that I machined at work and a couple hours.

The 370z as you know has 2 TB and they arent interchangeable.
the plug arent pinned the same from both side.

Like I said if I remember correctly its the driver side that need to be re-pinned like the passenger side.

that was my secret mod at the time just before I blew the VVEL and then well it was put on hold. Never tried the setup.

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Elmo370z

How did you blow the VVEL?

Zoren 370

Elmo have you checked the Z1Daytona TB? Been waiting for someone to make a review about it. Asked Z1 and the only answer was its top secret with an Lol at the end.

SlowZ

I think you mis read what I wrote. I wanted to bore out the stock throttle bodies. z1 ported my upper plenum. Sending out the stock throttle bodies to get ported costs just as much as just buying 2 stock maxima TB which are already a bigger diameter than the potentially ported 370s. I wanted to do porting of the TB or a bigger one if possible before I put on 3 inch charge pipes

Megan370z

sorry... if I went to much in details as to help you in case you would somehow decide to go with the maxima09 + TBs...

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SlowZ

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.

synolimit

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

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13 370z-

Dave s

does anyone know what the factory cylinder liner thickness is?

also has anyone fitted a vq40de 92mm crank?

BGTV8

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.

Dave s

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.

BGTV8

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
The Valkyrie 370Z lives on! Testing this weekend at Sonoma Raceway

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

1slow370

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.

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SlowZ

2 maxima ones are cheaper than that

synolimit

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.

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13 370z-

Elmo370z

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