Turbo 1992 FJ80 3FE (1 Viewer)

[Larsenoffroad]

Okay I am starting this thread to properly document the process of putting a turbo on my 3FE. Hopefully I can make this pretty straight forward for others. My hopes are to achieve enough power to not make me hate myself when driving it while also getting slightly better MPGs. Here is what I have calculated based off of the attached graphs so far and I hope to get feedback if I made any mistakes.

Stock RPM and EVE (Engine Volumetric Efficiency)

1000 RPMs--- 40 HP---.701885 EVE
2500 RPMs--- 90 HP---.631697 EVE
4000 RPMs---155 HP---.67995 EVE

Turbo Air Flow and Pressure Ratio (PR-Pressure Ratio) (CFM-Cubic Feet Per Minute)(BHP-Brake Horse Power)

1000 RPMs---4 PSI---PR 1.272108---CFM 63.059234---lbs/min 4.849255---BHP 50.649987
2500 RPMs---8 PSI---PR 1.544217---CFM 333.168572---lbs/min 13.244700---BHP 138.339580
4000RPMs---12 PSI---PR 1.816326---CFM 348.890670---lbs/min 26.829692---BHP 280.233470

With these calculations I am looking at a GT3071R turbo

GT3071R

GT3071R ORIGINAL GT SERIES AERODYNAMICS INTERNALLY WASTEGATED TURBINE HOUSING NON WASTEGATED TURBINE HOUSINGS AVAILABLE BALL BEARING CONFIGURATION WITH

www.garrettmotion.com

I hope 12 PSI max isn't too much and the torque down low won't be affected too much. I want an even increase in power across the powerband.

Step one is settling on a turbo and if anyone has a better recommendation or experience in this I would appreciate it.
Step two will be routing piping and all the fun fabrication and oil supply.

 

[scottryana]

I think a little larger turbo would be a better match. I would suggest at least a 3076. I do not think response will be affected much and I think a little larger turbo will help with IAT's and spinning the turbo at high speeds.

 

[UsedLuxury]

3fe boys hot off eBay when we see another turbo thread. I'm rooting for you.

 

[White Stripe]

What about a 2uz swap? Or a 1fz swap?

 

[Larsenoffroad]

What about a 2uz swap? Or a 1fz swap?

I just rebuilt the 3fe in mine and replaced the a440(looking back I should have swapped it). I have a 2nd 3fe i'm rebuilding so I will be able to but the first one to the test and if I blow it up we will all know the limits.

 

[Larsenoffroad]

View attachment 3300462
3fe boys hot off eBay when we see another turbo thread. I'm rooting for you.

I searched and couldn't find any real good threads on making this happen. This process will take some time but I have the tools to do it.

 

[USMCDocJ]

Watching this thread. Very interested to see what you come up with.

 

[UsedLuxury]

I searched and couldn't find any real good threads on making this happen. This process will take some time but I have the tools to do it.

I'm hoping you pull it off. I'd like to be able to go up a moderate incline without being passed by semis.

 

[Marco Lau]

What is your speed when going up moderate incline? How steep? At what RPM and what gear?
What tire size are you running? Stock gearing? How heavy is your rig?

 

[Larsenoffroad]

What is your speed when going up moderate incline? How steep? At what RPM and what gear?
What tire size are you running? Stock gearing? How heavy is your rig?

50-60moderate incline 3000- 3500rpms
45 steep incline 4000rpms
2nd and 3rd gear. Mostly 3rd
285/70r17 load range d tires
Stock gearing. No lift just stock height omu coils

 

[pgmatt]

What are you planning on using for engine management? I'm sure a 3076 or similar will really wake up the 3FE and make it pleasurable to drive.

 

[Mixelplix]

There's quite a few ways to determine compressor sizing, but I use CFM (and then eventually LBS/Min). I ran the calcs on a 3fe a few years ago, and I've uploaded my notes for anyone to use. I was using 6 psi and ~210hp as a target goal, but if you can follow the formulas, you can change your pressures and targets.

The biggest question on the table is how much can the stock fuel management system handle? I suspect the answer is not much.

There's several ways to combat fueling.. ranging from least to most complex: a rising rate fuel pressure regulator, adding an injector to the system tied off of manifold pressure (the cold start injector may be helpful), all the way up to a new management system such as megasquirt, or holley, haltech, ect.

I've done a lot of the math on this subject.. but nothing else.

There's a guy in puerto rico who's running a turbo 3fe on youtube, but not much detail.