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Discussion Starter #1 (Edited)
Cherokee budget turbo build DONE! Vid on page 5

Well I finally got around to mocking some shit up on this piece. I wired in the MSD BTM (boost timing master) and Apexi VAFC ahead of time.

The BTM basically retards the timing per lbs of boost. This combats detonation.

The VAFC is a Honda unit by design. It stands for VTEC Air Fuel Controller. This unit does a few things. It can be used to increase or decrease fuel on a load and rpm basis. It will also intecept the MAP signal to the computer and hide boost so the ECU doesn't think there is positive pressure. In its ability to increase or decrease fuel it allows you to use larger injectors and then decrease the duty cycle to inject less fuel back to a stock level.

Here is the BTM mounted in the truck. It intercepts the coil signal and adapts it.


Here is where I spliced into the ECU for the air fuel controller. You need to tap onto power, ground, TPS, RPM and splice the MAP wire. You can barely tell its there. All connections are soldered.


Here are the BTM adjustment knob and the VAFC in the Jeep.


Here's the turbo mounted to the up pipe. I need to make a stout bracket for it but this just about where its going to live.


This is the front section of the up pipe. I originally had the pipe to the driver's side but moved it since it didn't look like it would fit my 99 stocker too.


Here is my short radius bend since chassisshop.com screwed me on my mandrel donut bend. I just radius cut one. This is just tacked together like everything else. It completely clears the control arm mount and driveshaft when compressed.
 

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do you plan on putting in an inter cooler, bc thats going to be some mayor hot air.. going it the engine..
 

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Discussion Starter #3
do you plan on putting in an inter cooler, bc thats going to be some mayor hot air.. going it the engine..
Nope. I'm going to build a custom meth injection set up.
 

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ahh thats nice, a friend had that on a twin charged chevy cobalt...
 

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A AW4 trany can hold p to 900 HP. It's the same trany Toyota runs on the Supra.

Great build up.. What you expect to get for HP and Torq ratings?
 

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Discussion Starter #8
A AW4 trany can hold p to 900 HP. It's the same trany Toyota runs on the Supra.

Great build up.. What you expect to get for HP and Torq ratings?

I honestly don't have a goal. I got 36 lbs injectors so I can't really safely go over about 260 hp. We'll see. Im only going to run 8 psi on the little turbo.
 

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Discussion Starter #10
Are you going to experiment at all with more boost?

I would be very interested in a video of the completed project.
Im not really interested in playing around with it. I build turbo kits for all manner of cars. Most of them make huge power. This is just for fun and see if I can make a viable kit I could replicate cheaply to sell to guys that want to turbo but want to keep it cheap.
 

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Discussion Starter #12
Thats what I do on the side now. I build turbo kits. I really don't expect much to come out of this. The bulk of my work is Honda turbos and local stuff. I can't imagine there is much demand for Cherokee turbo kits. I just want to be able to replicate it if someone asks me too. Plus my daily driver is a 99 XJ and the motor is tired. I figure on getting a stroker built up for it and then boosting it. If I can jig up this piping I can just knock another one out for that.

Here is what I mainly do.








 

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Discussion Starter #14
My day job is Commercial Kitchen equipment and HVACR tech. I do the turbo stuff for fun and some extra cash to build my toys.
 

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Thats what I do on the side now. I build turbo kits. I really don't expect much to come out of this. The bulk of my work is Honda turbos and local stuff. I can't imagine there is much demand for Cherokee turbo kits. I just want to be able to replicate it if someone asks me too. Plus my daily driver is a 99 XJ and the motor is tired. I figure on getting a stroker built up for it and then boosting it. If I can jig up this piping I can just knock another one out for that.

Here is what I mainly do.








I used to be a welder for a living, and I have to say that is some good looking TIG work you've done there!!:thumbsup: What would your price point be on something like that??
 

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Thanks. I have never had any training on TIG or any other welding for that matter. Self taught from seat time and reading. Im not sure what you mean? The cherokee piping? I haven't really thought about it. I guess it would depend on if I could guarentee fitment and how much material and how long.
 

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YOu would be suprised as to how many XJ and TJ guys want turbos here in Michigan.. I know of about 12 people building them for there own rigs and a bunch more wanting one.. Most of the guys are putting them on the 4 popers to keep the HP up and the MPG up..
 

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YOu would be suprised as to how many XJ and TJ guys want turbos here in Michigan.. I know of about 12 people building them for there own rigs and a bunch more wanting one.. Most of the guys are putting them on the 4 popers to keep the HP up and the MPG up..
I think its fair to say there is a large market for 4.0 turbos out there at the right price.
 
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