crevasse

Introduction

I’d like to share my complete build for my supercharged 1UZ-swapped 2nd gen 4Runner. There is quite a bit of documentation out there for 1UZ swaps, but, as I discovered while working through my swap, that documentation is spread out over various forums and dozens of different threads and posts. I was frustrated not only by the decentralized nature of the information, but also by the lack of detail regarding various crucial aspects of the swap. People post write-ups and include braindead-obvious things like “drain your oil” or “unplug the wiring harness before removing the engine” while neglecting to mention specific part numbers or custom modifications required to make things fit.

In this guide, I’m not going to remind you to drain your radiator or include the steps for installing a timing belt. There’s common sense and factory service manuals for that.

Instead, I’m going to provide a detailed, comprehensive list of parts I used, a wiring guide that wasn’t done in Microsoft Paint, and I’ll provide valuable insight into weird snags and issues you’ll encounter. Snags that, if I would have known about ahead of time, would have saved me a combined dozens of hours of backtracking and headache. The guide is way too long for a single post, so just follow the Google Drive link above, and download the wiring PDF attached.

I'll try and answer questions related to the build or wiring diagram and provide edits if I missed something, but let me tell you in advance: I can't make a custom wiring diagram for every single person's custom build out there.

Enjoy!

Jakespeeds

Thank for this. Gonna study the pdf. I am going through my 1U completely right now getting ready to put it into my 95. I think I have most of it worked out but one question I have is the drivers side cam cover and brake booster. Did you have an interference issue?

Jake

crevasse

Hey Jake,

No clearance issues at all with the mounts I used. It's a tight swap in general, so there isn't tons of clearance, but the brake booster did not need to be removed or altered. What year 1UZ?

Jakespeeds

Its a 91 unit I have had for a long time. It was first swapped it a 88 Supra. The I had it in a 74 Pinto wagon. Then I supercharged it, put a R154 behind it and ran it in my 73 Nova SS. Then it spent about 8 years in a buddies Merkur XR4Ti. It was getting tired so I pulled it down to nothing and building it back together basically stock. Brand new Ross pistons and everything else machined and cleaned up. Still need to go through my automatic. My 95 is a V6 auto truck so I need to go through one of the many A340 transmissions I have and convert it to a 4WD unit. Since I can't use the hydraulic OE transfer case I bought a unit out of 95-98 T100. So I pretty much have everything I and just freshening it all up and getting ready for the swap. I am going to make my own engine mounts and I want to try and use fluid mounts.

Jake

crevasse

Very cool. This swap should be pretty straightforward for you then.

Jakespeeds

I am hoping so........But are they really ever?

Jake