Motor Swaps

Chrispy · Joined: 03 Nov 2007 Posts: 53 Location: Brisbane

Hello all,

I'm Chris, own a 1990 J-Spec 300ZX NA 5 speed and found out about this place from the Z forums. I've been tossing up wether to sell my Z and buy something a little newer (R34 Skyline, S15 200SX) or to keep the Z and swap the VG30 for a VH45 Nissan V8. If I do procede I will definately post up my progress.

I'm a mechanical engineer by profession and will happily give my opinion (if it's wanted or not Razz

) about anything.

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Having dillusional dreams of V8 Z happiness...

niall · Joined: 06 Sep 2007 Posts: 153

welcome and thanks for joining chris, we have quite a few brisbane members and now 3 ZX owners

Ill be looking forward to any conversion you decide to do.
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Chrispy · Joined: 03 Nov 2007 Posts: 53 Location: Brisbane

The VH45:

4.5L
Quad cam V8
All alloy heads and block
206kW @ 6000rpm
400NM @ 4000rpm (more than a R34 GTR!)
Forged bottom end with 6 bolt mains and main bearing brace
Standard engines have been known to rev over 8500rpm with upgraded springs and cams Shocked

THe heads on these engines are a work of art and the valves are massive! Tuned length intake manifold, 360cc injectors and can take over 600hp on the stock bottom end!
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Having dillusional dreams of V8 Z happiness...

niall · Joined: 06 Sep 2007 Posts: 153

yeah we gotta get you one of those mate.

would that make your ride a 450zx?
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Chrispy · Joined: 03 Nov 2007 Posts: 53 Location: Brisbane

LOL Yeah it would be a 450ZX. I'd have to get a custom rear panel... Cool

Don't spose you know someone who'd be able to make up some engine mounts would you? I'm pretty shocking with the welder Sad

I know a really good machine shop to do the gearbox adaptor if I can't get one from the states cheap. I think I remember someone making a conversion kit with the mounts and adaptors... have to chase it up. Might be a small market for them over here Confused

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Having dillusional dreams of V8 Z happiness...

niall · Joined: 06 Sep 2007 Posts: 153

i can make the mounts no worries chris, and i can get them checked by a QLD Transport approved engineer before they are fitted. thats no worries at all.

here are the last ones i made

thats seam welded 8mm plate with a stitch welded 5mm gusset. ispoke to the QT engineer before and after . he said they would hold a bridge up Smile

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Chrispy · Joined: 03 Nov 2007 Posts: 53 Location: Brisbane

Beautiful! That's one less hurdle to think about Very Happy

Are they solid mounted or are you using some rubbers?

I might have to have a chat with your QLD Transport guy, I have a million and one questions to ask...

Do you have to get approval before you get into it? I remember seeing that somewhere in the QLD Transport mods handbook.
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Having dillusional dreams of V8 Z happiness...

niall · Joined: 06 Sep 2007 Posts: 153

yeah ill get you the blokes detalis chris.

I dont think there is any need to get it pre - approved unless it is something that is outside the standard guidelines or even borderline

Installing a 4.5 litre n/a v8 into a 1500kg vehicle is well within the guidelines so as long as extensive firewall modifications are not neccesary it will not be an issue.

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