Cherokee budget turbo build thread - JeepForum.com

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post #1 of 91 Old 10-12-2008, 06:44 PM Thread Starter
CSaddict
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Cherokee budget turbo build DONE!! Vid on page 3

Well I finally got around to mocking some **** 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.



Last edited by CSaddict; 10-25-2008 at 11:52 AM.
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post #2 of 91 Old 10-12-2008, 06:57 PM
Rollin
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This is going to be interesting

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post #3 of 91 Old 10-12-2008, 07:10 PM
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nom nom nom. you can mock everything up and send it to me if you'd like. I will do a full 10 year trial and tell you how it works!

my jeep has the confused prerunner syndrome....4.5" in the rear and 2" in the front.

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post #4 of 91 Old 10-12-2008, 07:15 PM Thread Starter
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After I build it all, I'm going to take it all out and see if it will fit in my stock 99 XJ.
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post #5 of 91 Old 10-12-2008, 07:20 PM
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you should keep a parts list, and prices on what you paid. I'd love to get back into a turbo, and knowing what I'd be getting myself into $ wise would be great

my jeep has the confused prerunner syndrome....4.5" in the rear and 2" in the front.

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post #6 of 91 Old 10-12-2008, 07:20 PM
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Nice work so far. Have you considered using the '99 Intake manifold? This is awesome.

1999 Jeep Cherokee SE l 4.0 HO l AW4 l NP231
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post #7 of 91 Old 10-12-2008, 07:32 PM Thread Starter
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Quote:
Originally Posted by xjpilot View Post
you should keep a parts list, and prices on what you paid. I'd love to get back into a turbo, and knowing what I'd be getting myself into $ wise would be great
I have $869 total into the build including a $242 wide band O2 set up. Only thing I need are oil lines and some couplers. Oh and maybe a turbo bag and some wrap.
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post #8 of 91 Old 10-12-2008, 07:33 PM
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what are you doing about a blow off/recirc valve?

my jeep has the confused prerunner syndrome....4.5" in the rear and 2" in the front.

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post #9 of 91 Old 10-12-2008, 07:34 PM Thread Starter
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Quote:
Originally Posted by KamekLocked View Post
Nice work so far. Have you considered using the '99 Intake manifold? This is awesome.
I'm not really into making huge power with this build. I know the 99 is a larger volume unit but with the turbo I think it will make plenty of torque.
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post #10 of 91 Old 10-12-2008, 07:35 PM Thread Starter
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Originally Posted by xjpilot View Post
what are you doing about a blow off/recirc valve?
RFL knock off. No need to recirc on a MAP vehicle.
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post #11 of 91 Old 10-12-2008, 07:39 PM
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rfl? never heard of it

my jeep has the confused prerunner syndrome....4.5" in the rear and 2" in the front.

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post #12 of 91 Old 10-12-2008, 07:39 PM Thread Starter
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Turbo XS RFL.
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post #13 of 91 Old 10-12-2008, 07:42 PM Thread Starter
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post #14 of 91 Old 10-12-2008, 08:44 PM
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Thats incredibly cheap! much cheaper than the HKS I had on my VW

my jeep has the confused prerunner syndrome....4.5" in the rear and 2" in the front.

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post #15 of 91 Old 10-12-2008, 08:51 PM
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I'm going to be following this one

-Bryan- ΚΔΦ-MΘΣΝΔ
Fighting the rust since April '08...
A Maine XJ Nightcrew!
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