Supercharging the 1FZ-FE... the harder way? (1 Viewer)

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yet

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Aug 18, 2021
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So, I was going to make a post as a fait accompli, however, on day 3 or so now of work it has become so difficult and ridiculous I figured that I would just drag it out and post as it happens...

Preface: Bought '96 a few months ago. Found low miles (125k) as little rust as possible. Didn't care about triple locked (I want ARBs eventually) or anything fancy, just wanted a solid base that hadn't been wheeled hard (so I could later!).

Love the Cruiser. Makes me feel like an idiot for being such a Bronco fan for all these years. In fact, I canceled my order for a brand new one (but that's a story for another time). Love the cruiser... but it's quite anemic in the mountains. Needs more power. If I can buy a forced induction vehicle I always have. Love turbos. Wits End turbo kit seems delayed indefinitely and I only have a good solid two months to complete the upgrade....

So I bought the only supercharger kit I could find.

Before buying it I installed a wideband AFR, an EGT, and a boost gauge. Put 1000 miles or so on the gauges to have a good baseline idea of how the engine behaves. Also new plugs, compression test, timing adjustment, water temp gauge mod, etc.... so far so good.

Got the rotrex kit off cruiserparts.net. It's expensive! But this is my one hobby currently and it seems like quite a complete kit, including air/water intercooler. Before I purchased it I looked for any threads or reviews of it here. Couldn't find any (I'm sure someone will point out dozens now). Looks like an Aussie based kit judging by the sketchy pics on the website. Figured I'd have fun figuring out how to install it....

Got the kit a few weeks ago. Four boxes. One with the intercooler heat exchanger. Another box with assorted parts, brackets, and hoses. One with the supercharger itself. Final box had hardware and the SMT-8 piggyback computer (which upon further research seems like the company is defunct and I'm not sure I'm going to use it).

Zero instructions... OK I thought, this would be a fun challenge...

I stared at the kit for three weeks and the first problem I noticed was there seemed to be no room for the intercooler's heat exchanger and oil cooler (for the centrifugal supercharger). I can't figure out if their pic is of a Cruiser with no A/C or what. Too stubborn to call them and ask.

Day 1 goal was to install supercharger bracket with pulley, and leave supercharger hanging. Was hoping to keep the vehicle drivable while slowly building up and installing components.

Problem one, OEM data plate with VIN is right where bracket for supercharger goes. Tried to make a hole in it, had to grind it off as the 'rivets' messed up the fitment of the bracket...
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Eventually got the bracket installed.... which helped me realize what those funny spacers were for. The fan/clutch assembly. Cool

A bit of cussing and fan/shroud jiggling later and bracket was installed. Seems to run fine even if the finish is horrible on the bracket and already peeling....

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At least it seemed fine. Visually inspected and ran it for five minutes then decided to pick up the kids from school five minutes away. There is a certain stop sign on an incline leading to a right turn (up a hill turning right) that I had noticed a strange subtle sound on since I got the Cruiser (only could hear it when I had the radio off). Hadn't worried about it much as everything seemed OK, and I figured eventually I'd discover what it was.... well now I know. Apparently the fan has been gently kissing the shroud before on this climbing right turn. Now with the spacer in, there was a sickening "thwack thwack thwack" and I knew I was in trouble. Stopped car and inspected the damage which was about what I expected. After doing the post mortem seems the fan interfered with the shroud and broke, flinging a piece of blade down into the radiator. Towed home....
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Funny thing is about ignorance.... you don't know what you don't know, which makes it hard to search for things in a forum. One quick search for "supercharger fan interferance" and I was enlightened. Only one day for toyota dealer to get parts thankfully. This morning I picked up the shrouded fan to install, as recommended for supercharged 80s (Toyota part 16361-65010), new radiator, new shroud (I cracked it while removing it), coolant, and possibly most important new motor mounts. Funny enough the motor mounts were on my list of things to do but way down at the bottom. I had noticed a good bit of play in the transmission while going over bumps. Guess I should've completed all required maintenance first... or maybe not because I might have never discovered the fan change was needed. ¯\_(ツ)_/¯ stay tuned for more...
 
Episode II:

Decided since I had the radiator out and had easy access that I'd go ahead and bolt the pulley for the SC to the crank pulley. Couple of bolts, no problem. Funny enough the crank pulley only has two holes which I found strange (anyone feel free to enlighten me about this). Still haven't decided if it's necessary to drill and tap two more holes. Anyways I ran the tap through the two holes to clean out the rust and detritus of 25 years. Then as a test fit just snagged up the bolts, and the second one snapped.... seriously. I wasn't torquing hard, just snug...
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This sucks....
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The bolt was so defective that when I got the extractor in it, it wouldn't come out in one piece. Seriously soft. I am not going to trust any hardware supplied with the kit now. Got a chunk of it out but eventually had to very carefully drill out the remains and clean chunks out by flushing the hole with WD-40, my wife's tweezers (don't tell her, please), and running the tap through a few more times.

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Finally clean! (Took all morning).

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Seriously reviewing my life choices right now...

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Pic of the pulley as it sits. Have ordered a new transmission cooler core from summit racing which by my math should barely fit with the new cores (as long as I delete the stock center support) and hopefully cool as well as stock.

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Tomorrow motor mounts and heat exchanger madness....
 
Interested in following this install. Have looked for a trd kit for months to no avail, emailed bullet cars with no response, and intrigued by this kit as an option. Best of luck!
 
Don’t know if you got the same kit but my buddy has a Toyota shop and a customer bought the bullet kit and imported from Australia, no instructions really and seemed to be missing some stuff, was unable to complete it on a North American 1fz but I think he was also missing some stuff
 
Don’t know if you got the same kit but my buddy has a Toyota shop and a customer bought the bullet kit and imported from Australia, no instructions really and seemed to be missing some stuff, was unable to complete it on a North American 1fz but I think he was also missing some stuff

I'm definitely going to have to get creative, but from what I can tell, as long as I can figure out how to mount everything, I seem to have everything needed to complete the install. Will it be pretty? No. Will it run? Maybe. What kind of boost will it make? Absolutely no idea.

One of the photos on their site shows it installed on a non-distributor motor. The US never got this and wonder if it will bring some challenges.
Post more photos of the setup and best of luck!
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As far as the non-distributor motor, the throttle body appears to be in the same place which is good, and could've been a major hurdle. The only thing that concerns me is hooking into my stock intake, but my hoses look completely different from those pictured (which is a good thing), so I'll know when I get there I guess.
 
Episode III: aka Day 4...

So, got the intercooler mounted loosely. Took three guesses before I got what I assume are the correct brackets for the intercooler.

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Once sitting on the brackets I realized that I was woefully incorrect. The throttle body is definitely in a different place, well, either that or the kit has some very loose tolerances....

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I can make it work by bending the brackets (which unsurprisingly at this point, are easy to bend). With hoses attached the intercooler, it sits quite wonky and was definitely designed for the more modern 1FZ-FE. But, the hood still closes and thus I press on. I ditched the mounting clip for the cruise control on the MAF so that I could rotate the intake rearward for a better fit (not pictured). There is no hose included for connecting the MAF to the supercharger inlet... I will have to source one.
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Got the transmission mount half off today, and had some other realizations....

Largest of these is that the intercooler heat exchanger absolutely will not fit. I give up. No way. I thought it would fit if I deleted the center support (which the trans cooler is mounted on). I've seen pics of 80s with this deleted for full span intercoolers, but I neglected to take into account the hood closure mechanism. Not going to start pinning my hood for a questionable install, so I'm done with that. Strapped the original transmission cooler back in and was going to press on without intercooler for an initial test but I realized that the cooler I bought to replace the original transmission cooler will fit quite nicely and will suffice at least temporarily as a small heat exchanger for the intercooler. Fitting will now be easy, or so I thought....

Further epiphanies today:
1) The intercooler connections and heat exchanger connections are 1/2" for the supplied 1/2" heater hose to be used, however, the water pump provided has 3/4" connections... seriously, can't make this up.
2) The supplied water pump is a good one (popular bosch unit) but comes with no wiring harness.
3) The OEM intake tube actually tapers from roughly 3.25 inches at the MAF to 3 inches at the throttle body which could make things interesting.

At this point there's no way I recommend this kit for anyone with a US spec 80. It's not made for this vehicle, missing a few necessary (but easy to come by) pieces, and just plain not very well made (heat exchanger size, bracket fit and finish, etc).

That being said, I'm going to press on. Not ready to give up yet.
 
Stick with it, you’re almost there 🤔

1. You can source reducers to get the intercooler pump to connect to the intercooler.
2. You need to call the vendor about the wiring loom. Otherwise, you just need to pick a power source from under the hood; that pump will draw low amps.
3. A 3” silicon sleeve will fit the MAF. This pic shows a 5mm thick, nylon reinforced hose. I had to chamfer the inner diameter, warm it in boiling water to soften it and apply some lube (soap) to assemble. I need to fit the clamp.


By the way, I think you’ll need to cap off the PCV hose at the throttle body and route the other end to a catch can. Otherwise you’ll be pressurising the crank case when under boost.

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Stick with it, you’re almost there 🤔

1. You can source reducers to get the intercooler pump to connect to the intercooler.
2. You need to call the vendor about the wiring loom. Otherwise, you just need to pick a power source from under the hood; that pump will draw low amps.
3. A 3” silicon sleeve will fit the MAF. This pic shows a 5mm thick, nylon reinforced hose. I had to chamfer the inner diameter, warm it in boiling water to soften it and apply some lube (soap) to assemble. I need to fit the clamp.


By the way, I think you’ll need to cap off the PCV hose at the throttle body and route the other end to a catch can. Otherwise you’ll be pressurising the crank case when under boost.

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Awesome, thanks for all the info.

Amazon really came through. Have a silicone 3.25 to 3 inch reducer arrived today (apparently this is a common problem). 3/4 to 1/2 inch barbs on the way (probably could've gotten at the hardware store but while I was loading up Amazon...) Bosch wiring harness already arrived. Plan on tying it into the switched power source in the hood fuse box and add a fuse there. I seem to remember there was at least one blank slot left.

The kit comes with provisions to reroute the pvc hose (number 2?) to the intake before the supercharger. I'll admit I'm confused though, this is the first car I've seen with two ventilation pcv hoses? At least that's how they're labeled in the manual. May put a catch can on the other one? All supercharged applications I've seen pics of, including the TRD installation manual seem to leave one in place (I think it's the No.1 PCV Hose) (thanks @george_tlc for the link to the TRD stuff)... Still unsure what to do here. The one that I've seen left in place is the one with the actual pcv valve on it.

Edit: search is my frend...
 
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Day 5. Not many pics today. Too busy getting this stuff done.

Oil plumbing done for supercharger. Started getting excited about halfway through. Things went well despite my stubborn insistence on keeping my dual battery setup which is starting to make things tight. Have a glimmer of hope that this may actually work.
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Transmission mount replaced. Original was in bad shape. Actual motor mounts seem fine and I'm contemplating saving them for a later date.
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Revisited the wonky intercooler mounting and realized that I was using the wrong bracket. Found the nice beefy correct bracket and realized that the intake is actually in the same place in both this version and the distributor-less models.... with one tiny exception. The throttle body seems to be about an inch or two further towards the passenger side in mine. This means I either will have to put spacers on the mount for the intercooler (which will interfere with the heater line) or cut off two inches from the supplied intercooler which leaves me with no lip for the hose. Gotta do some research and see how important that is for a good seal...
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in the picture with the MAF sensor that vent pipe needs to be plumbed in pre-compressor otherwise you will pressurize the block and oil with start spraying out of your dip stick .

With that hose routed correctly oil vapor will now enter the system pre-compressor as it should but with the MAF sensor post vent it will get contaminated by the oil vapor and stop working in short order. So the MAF sensor needs to go pre-vent in the system.
 
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what you need to do is face the air cleaner toward the rear of the truck, put the MAF sensor back in it's place and come out of it with a 180* U pipe above the exhaust manifold and facing toward the intake of the charger. Now you will need a section of 3" pipe that has a hose barb on it for the vent.

For now I'd skip the intercooler completely and just focus on getting the engine to run.
 
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