Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/My Next Motor Swap Project
Imported from Z31Performance.com Forums{{#if:amreboot| — original post by amreboot}}{{#if:2013-12-29 23:15:06|, posted 2013-12-29 23:15:06}}{{#if:32| · 32 post{{#ifeq:32|1||s}}}}{{#if:/Z31performance_archive/forum/z31-performance-upgrade-forums/engine-mechanical-aa/23133-my-next-motor-swap-project.html|
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amreboot: (2013-12-29 23:15:06)
VK56!!
Nothing like a 5.6 V8 turbocharged to satisfy my thirst for more power!
It might take me a few years to complete the swap
Preliminary plans are
Forged Internals
Cams
Bigger Injectors (E85)
Plan on using my PTE6765
And a ton of custom fab work!
G-E: (2013-12-29 23:46:58)
Haha! Coooooooooool
How does the height compare to the vh45?
Neil86t: (2013-12-30 00:47:26)
Will it fit or it is gonna look retarded as a lightning swap in a SN95?
amreboot: (2013-12-30 01:17:08)
Dry weight of VH45 = 478lbs
Dry weight of VK56 = 506lbs
Dry weight of VG30 = 392lbs
This all was found by googling. I am not 100% of accuracy, but sounds right.
amreboot: (2013-12-30 01:19:14)
If its fits in a 350z, it'll fit a z31 with no problems.
jaqattack02: (2013-12-30 02:30:29)
Looks like a lot of work ahead. What trans will you use?
badboyz31: (2013-12-30 02:42:34)
350 or 370 tranny with an adapter from my main man brett collins at collinsadapter.com
Neil86t: (2013-12-30 02:43:53)
And it will last 2.5 seconds.
amreboot: (2013-12-30 02:55:20)
Yup, that guy makes a z32 adapter.
i r teh noobz: (2013-12-30 03:02:59)
I wanted a VK56 for my 88, but I settled for the 5.3 instead. I'll be watching this one.
Someone out there in internet land makes swap kits for the Z33, perhaps some of the components could be adapted for the Z31?
amreboot: (2013-12-30 03:23:38)
The z32 and z31 share the same bolt pattern.
The vk56 to z32 transmission adapter will work the z31 transmissions.
G-E: (2013-12-30 04:30:03)
But alex, think of the starter, doesn't that mean you have to use the vk->vg adapter AND z32 bellhousing+starter?
amreboot: (2013-12-30 05:22:15)
Yup. Thats correct.
I already have the z32 trans in my Z now. I still have the z32 bell housing sitting in the garage. So yup, all I need is a z32 starter.
AND get this! The crank of the vk56 accepts the flywheel of the z32, no modifications!
Pretty straight forward!
i r teh noobz: (2013-12-30 05:25:08)
I was referring to engine mounts. I think SIKKY makes a kit.
Tempast: (2013-12-30 07:15:28)
The real question: What kind of numbers will it support compared to your already powerful VG.
This looks like a lot of fun.
G-E: (2013-12-30 08:35:34)
I heard this, yea that does make things easier
Some inspiration: https://www.facebook.com/media/set/?set=a.218929391483662.53644.176364502406818
jaqattack02: (2013-12-30 14:12:44)
Why the Z32 trans? Why not something out of a 350 or 370? Or even something like a 6 speed out of a Frontier?
At least besides the obvious, you already have it.
The Frontier gears are a bit taller through the first few, but you could compensate with the rear end if it was an issue. Not like you'll be lacking in torque.
http://www.300zx.org.uk/gear_ratios.htm
jaqattack02: (2013-12-30 14:19:27)
For comparisons sake…
It wouldn't be too far off from the GTO ratios if you geared down at the rear end a bit.
stufferton: (2013-12-30 14:56:44)
I imagine part of it is that he already has what he needs for the z32 trans aside from a starter. Plus the z32 30a is known to hold 600+hp, and 5 gears > 6 gears when the final ratios are basically the same.
On a different note, since you are doing this if my VG pops I'll have to figure something out to get a TB48DE over here if I want something nobody has done with a z31 yet.
andyray187: (2013-12-30 20:17:40)
this is awesome alex. not sure if the same power potential is there between the vk and say and ls but awesome none the less
G-E: (2013-12-31 00:43:19)
8800rpm from a huge v8 is ridiculous!
james: (2013-12-31 08:18:33)
My Brother in law has fitted one to his brand new jet boat build, does 107 kmh on a 3 stage Hamilton jet no problems.
According to the marine calculations for Jet units it makes it around 400hp. The thing i found interesting is how they don't run a fuel return off the rails. Andy had to tig weld fittings to his so he could run a conventional fueling system to suit his ecu.
darryl rice: (2014-01-02 22:44:30)
Amreboot,
Is the vg33 running ok?
amreboot: (2014-01-05 01:47:42)
Yeah, its running great!
Why you ask?
darryl rice: (2014-01-14 12:30:15)
Sorry I caught the tail end, we're you putting the v8 in the black z or something esle?!
darryl rice: (2014-01-14 12:30:22)
Sorry I caught the tail end, we're you putting the v8 in the black z or something esle?
darryl rice: (2014-01-14 12:30:25)
Sorry I caught the tail end, we're you putting the v8 in the black z or something esle?
THEBEAST: (2014-01-28 19:39:46)
you might have to use a spacer for the z32 flywheel. the starter might have to be shimmed because of thickness differences in flywheels between na and t. the starter is the same between na and t.
THEBEAST: (2014-01-28 19:41:18)
same with the bellhousings, one is thicker than the other where the bh bolts to the block
NissanEgg: (2014-02-01 03:47:56)
The VK56 in the Titan, Armada, and V8 Pathfinder run a constant 51psi from the fuel pump. Nearly all Nissans with returnless fuel system run 51psi.
i r teh noobz: (2014-02-01 19:45:59)
The GM stuff is 58psi returnless. If you don't use the factory engine management you can run this $30 filter/regulator assembly:
http://www.rockauto.com/catalog/more…943&cc=1353170
Mutant-Z: (2014-05-25 02:51:56)
Im doing the same thing in one of my Z's with a VK56VD.