Lexus 4.0 swap/solid axle swap-92 4-Runner pics and write up

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lovely swap! One reason why I didn't want to purchase another 2nd gen 4runner was because the motor was just terrible slow and used up 2x the fuel of the 1uz! :) Now I got high hopes.
 
I guess I should post up some pics huh?!! lmao, I ran the balls off the v6 til it croaked again @324,000 miles,
wow has this changed.

IH8personalcomputers!! when it f*cks up I hesitate fixing it. it will only do it again hence why no updates to this build. Toyminator on this site was nice enough to fix it again.... Thanks Steve, BTW we gotta drag race these things (Steves 1uzfe shortbed build aka toyminator)


I will post up todate pics- top is cut off, fenders trimmed-wheel base lengthend, 3 link rear and I am sure some other stuff too (1UZFE as well)

the V8 found its home and after many hours putting lexus fuses/relays into factory (underhood) fuse/relay box on the 4 runner.

I will post up pics of a wire harnes that plugs between the 2 vehicles systems using factory Toyota plugs.
 
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SC400 air box and a 3 inch intake (mandrel bent stainless)
I had to make a 5 degree wedge to make the mass air meter 'point' at the intake butterfly otherwise it wouldnt have mated up to the mandrel tube without a goofy silicone hose

SC400airbox-1.jpg
 
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Off Roadster

here are the new doors for the convertible.... or should I say roadster (no top ever makes it a roadster not a convertible)

hence the name Off Roadster

btw door weight with windows and electrics 55 lbs (passenger n driver doors) after removing glass and window motors the weight was cut in half down to 27 pounds per door add that to the back window glass, sunroof and 2 back side windows along with the weight of the entire metal top and thats some crazy weight savings.

the roll cage will bring some of that weight back though

roadsterdoors-1.jpg
 
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those pics you posted are a little small... it's hard to see the details... :frown: do you think you can post ones twice as big? :)
 
those pics you posted are a little small... it's hard to see the details... :frown: do you think you can post ones twice as big? :)

Hope those are better, pics suck they are from my antique camera phone. will get my dig cam out n get some better pics



Side note if doing this swap the SC400 tranny has a lower 1st gear than the LS400.

SC400 1st 2.804, LS400 1st 2.53

Obviously the SC is a better choice when doing this swap. the LS would be fine but if you can get an SC do it

The other side note is that the T100 transfer case will bolt right up to the lexus tranny, if you are just replacing the engine and not doing dual cases that would be the way to go.

To save a buck you can use the T100 transfer case portion that bolts between case and tranny then do a marlin chain driven to gear driven adapter (350ish) and save a few bucks over doing the inchworm prerunner adapter (600)
 
Lexus fuel pump in Toyota bracket. I had to cut the tip that retains the fuel pump on the bracket from the lexus (form fitted with a rubber piece) and weld it to the 4Runners bracket and rewire.
it uses a heavier gauge wire as well. larger pump - more draw

Side note- the SC400 pump is as small as the V6 and 4cyl.
but has a higher pressure and more gph.
4runlexpump.jpg
 
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Poor mans 3 link

I had a pain in the ass of a time getting the rear lifted high enough to match the front so after looking around at my 80 series I came up with using the 80 lower rear links (50 percent longer..11 inches to be exact) and 80 series 2.5 inch lift springs (stock net you about 2 inches when used under the 4Runner) so these should be 4.5 to 5 on the 4Runner.

I have already measured again and again and have the upper triangulated link made using a single rebuildable johnny joint attached at the center of the rear axle (98 4Runner-wider to match the 80 front I will be using) and 2 mounting points at the frame. close to the factory location... kinda.

Modifications were needed to the gas tank to clearance for the mounting points. not much tho, I didnt lose much volume. will post those pics up later, I am getting ahead on myself.
 
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The fuel pump relay is the bright yellow/green (Lexus) one that you see in the fuse box.
Not all models have the same fuse/relay box or an empty location but this one did and it worked out fine.

The Circuit Opening Relay went inside the cab where the original Toyota C.O.R. went.
fuelrly.jpg


Underneath the red main battery (+) wire you can just make out the 2 speed fuel pump resistor, I had to upgrade the fuel pump main power wire to the pump. The original was about half the size of the Lexus wire.

The black plastic shiny 6"X 6" box behind all of that is the cruise control....not quite mounted yet.
 
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Rear lower links/poor mans 3 link.

Here are the lengths/differences in the FJ80 and 4Runner lower links.

4Runner- 18.25 inches/463.5 millimeters

FJ80-27.5 inches/698.50 millimeters

9.25 inches/234.95 millimeters longer

50 percent longer(9")plus 1/4"/ 6 millimeters (9.25 Total longer)

I havent measured the diameter.


I may integrate johnnyjoint/heims style end onto it later, as for now I am setting it up and tuning it so its retains some of its road manners.

I will use an Old Man Emu FJ80 rear lift spring OME863 3 inch lift spring, hoping for a total of 5 inches.

I have the the 4 inch front leaves and shackle and a stock landcruiser coil in the rear (2, 2.5 inches?) and a 1.5 spacer and it sits ass low...bad.

I am stretching the wheel base 3 inches as well.

1. to clear a larger tire without butchering the wheel well.

2. Stretch it a little to help with stabilty and do better in some situations off road (I will probably never notice a difference)

3. if all goes well this will have some serious travel in the rear.

I will have to move the spring buckets back as well, and I am adding hydraulic bumps stops in the center of the new spring cones.

I will be able to remove the rear panhard rod as well.

EDIT-I know, pics suck. deal with it for now. I will get clean crisp ones when I can and clean up this old thread as well.
links.webp
 
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