GX81 & 1jz conversion

**triptek** · 07-05-2009, 03:28 PM

I'v got a 1988 GX81 that i have to do a 1jz conversion on in the next few weeks. Just wanting to know if they have the same crossmembers as the later model gx81/jzx81's. Or will i have to swap it out for a later model crossmember.

Any help appreciated

JP · 09-05-2009, 10:48 PM

When I did the 1J swap in my 1988 GX81 GT, the crossmember was slightly different to the jzx81 crossmember I bolted into it. The GX crossmember was more similar to a series 1 MX83

**triptek** · 10-05-2009, 12:38 AM

Cheers, exactly what i needed to know. + rep comin your way.

**ae95** · 10-05-2009, 12:58 AM

definately different
im doing the exact same swap

**cresta** · 09-03-2010, 04:20 PM

hey im about to undergo the same swap,,i have a gx81 i wanna put a 1j into and replace the 1g it has in it now,,what needs to be changed, do i need new mounts or just modify existing? and do i need a jzx81 cross member?

JP · 09-03-2010, 04:39 PM

jzx81 crossmember is the easiest. I've got a set of jzx81 alloy engine brackets to sell if you start with a non-jzx81 or jzx90 engine.

**cresta** · 09-03-2010, 05:03 PM

Originally Posted by JP

jzx81 crossmember is the easiest. I've got a set of jzx81 alloy engine brackets to sell if you start with a non-jzx81 or jzx90 engine.

this is all info i have on engine atm,
1JZ-GTE - 2.5L Twin Turbo Eng

Part No: ET-1JZGTE
Available: Yes
1JZ-GTE to suit JZA70 Supra 91 - 93, JZZ30 soarer 91 - 95 Capacity: 2491cc Kilowatts: 208 kw

is this what your mounts would be suited for?