1jz-gte and 1g-gte similarities (Can I replace one with the other.. He thinks)

[stradlater]

As per my sig, I have a 1g with a single turbo, in my RA23.... Now, it's all far from standard, and I would imagine all pretty adaptable (Particularly the ignition system, which is my prime concern... ).

I'm thinking I might run my 1g until it dies then go to a 1jz... Thinking though, does the 1jz have a dizzy? And, how different are the exhaust port placements on the 1g from the 1jz? I've got a custom manifold and I'd have to have it altered to fit the 1jz..

Plus, I'm sure there are ways of fitting a W58 behind a 1jz yeah?

How similar are teh mounts?

[chris davey]

yes, 2jz has w58 so you can use that.

1jz has no dizzy.

Not too sure on that one but you could either modify the manifold if it is possible or just get a generic 1jz t04 manifold and sell yours.

Are you going to run it on gas?

[stradlater]

A) My turbo won't fit on a t04 manifold me thinks.. Might be wrong, but I don't think it will. Plus I've already pumped shit loads of money into that manifold.. hehe

1jz and no dizzy is gonna be the worst bit
Cos I have a CDI system with only 1 coil......

But yes, I am gonna run it on gass it if I get it together...

[chris davey]

I thought gt40's use a t04 flange? Either way I don't think it would be hard to get a manifold to suit that turbo but it depends on how much area you have to work with. My manifold is for a jza70 and I only had to shorten the bit for the wastegate. But of course if you can modify the one you have that would be best.

bad luck about the CDI. AFAIK you would need a 3 channel to run waste spark or a 6 channel or a (4+2) channel to run sequential. Depends on what ecu you are going to use.

It would be great to do but it does seem like a very costly upgrade. If all you want is 11's why not just continue with the 1g. I think it could be done with a bit of fiddling

[ndgcpr]

i always thought a 1JZ would mash a w58 into a pile of gearbox soup? am i wrong? to me stradlater doesn't sound like he is going to "drive nicely"

[1JZ-Rolla]

Why don't you adapt a points dizzy mechanism with mechanical advance to the front of one of the cam pulleys? Will go good with the bbq fuel ;-) Just kidding.

It would certainly be easier to make an adapter for the T4-T3 flange on an aftermarket manifold like chris davey's, rather than try to modify all 6 runners of your 1G mani. Surely you could sell your 1G one for more than it would cost to buy a mass produced 1JZ stainless one?

The 1JZ is considerably longer than the 1J, but can fit the RA23 without firewall or radiator support mods, as proven by Chuck here in Canberra with his very tidy VVTi 1JZ RA23. It runs a W58 also, however is fairly close to factory power output, so with the extra torque of your upgraded turbo setup you could potentially be creating a box full of neutrals :-)

I say go for it! They're practically as cheap as a 1G now anyways.....

Cheers

[stradlater]

Drive nicely? Hell no... hehe

[stradlater]

just depends on the ignition setup really .THat's my only concern.. The manifold is pretty simple like you say

[takai]

I didnt notice, but are you running aftermarket management? Because a 1JZ wont run with a 1G ecu. Which brings up another issue, why bother converting the dizzy to a CAS wasted spark system (DLI) when you will simply need to change the ECU over as well?

[Norbie]

Thinking though, does the 1jz have a dizzy?

1JZ-GTE (turbo) is coil-on-plug, no dizzy.

And, how different are the exhaust port placements on the 1g from the 1jz? I've got a custom manifold and I'd have to have it altered to fit the 1jz..

1JZ is longer than 1G, exhaust ports won't come close to matching.

Plus, I'm sure there are ways of fitting a W58 behind a 1jz yeah?

If you can get your hands on a 1JZ-GE or 2JZ-GE (non-turbo) bellhousing, no worries.

How similar are teh mounts?

Completely dissimilar.

[stradlater]

I think norbie has hit the nail on the head there..
Just rapidly became too hard.. Shame, but 3 out of 4 answers he gave work towards me not doing anything.

As for the ECU.. It's on LPG and it only uses an aftermarket ignition computer... Setup for a dizzy, that's the catch.

[CrUZida]

Couldn't you use a 2JZGE head, which has a dizzy.

[stradlater]

bolt the NA 2jzge head onto a 1jzgte? would that work/be wise?

[JustCallMeOrlando]

People put 1JZGTE heads on 2JZGE blocks, I can't see why the reverse wouldn't be possible. If you're going to that much effort you may as well just get a 2JZGE and be done with it.

[chris davey]

that would be a reverse 1.5jz. Not many people would do it but in this case it may be a feasible option If you can pick up the bits you need at the right price.

JCMF: you mean NA-T the 2jz-ge? That would be a good option but I think it could get pretty expensive if you plan on dropping the compression through forgies rather than thicker HG. Also, not sure on height difference between 1g and 1j but the 2j block is taller again. I don't think I could fit a 2j block in my car without having one very large bonnet scoop as it is very close to the bonnet now.