1FZFE Turbo setup?

[HDJdreams]

Does anyone have a turbo setup for their 1FZ that they are HAPPY with?

When I searched "turbo" it seemed like it was pretty much all the posts were either about struggling to work out bugs or speculation. I.e. Lots of people have looked at CX Racing kit and had opinions on it, but I don't remember anyone posting that they had actually gotten the kit.

A turbo seems to be ideal to deal with elevation, it certainly works great in my diesel truck.

I need to rebuild my 1FZ this summer, I would like more power for mountain freeways. (I live off of an 80 mph freeway with an uphill merge ramp, the status quo is a road hazard.)

Since I will have the motor apart, trying to figure out whether to turbo it or not and if so should I do anything special during the rebuild? My biggest concern is having a reliable set up, not looking to build a race motor.

My ideal set up would be able to hold speed fully loaded going up I-70 over the Rockies during the summer and handle desert heat.

Thanks

 

[scottryana]

Yes it can be done, it can be done any multiple of ways from mild to wild, it can meet or exceed your expectations, just depends on how much you want to put in to it. What your current skill set is, if you are willing to pay for someone to do the work you can't or don't know how to.

 

[HDJdreams]

I take it you have a turbo setup you are happy with?

My goal is to for the turbo to make power levels similar to TRD supercharger and be at least as reliable, hopefully more so. if there was a well tuned complete kit like the old Safari Turbo kit, I would install it myself.

Since I have not found a good kit, I planning on finding a shop to do the work. I am hoping find people that have set ups that work well to get idea of what works.

Since I am focused on quick spool up and low and mid range torque, I think I should be leaning towards a smaller turbo, an inter cooler and minimizing heat under the hood?

I am hope it is realistic to do this for less than $5k, hopefully less than $4k.

 

[tomcat]

Hi
I just helped someone fit this turbo kit to there cruiser. was meant to be bolt on, but we had to make a few changes.
Total time was about 12-14 hours.

http://www.axtturbo.com.au/1fz-fe_45l_engine.html

 

[AussieHJCruza]

@scottryana has to have the sweetest turbo 1FZ that I know of - if you're thinking of going the turbo route, IMHO, his thread should be compulsory reading.

 

[HDJdreams]

Hi
I just helped someone fit this turbo kit to there cruiser. was meant to be bolt on, but we had to make a few changes.
Total time was about 12-14 hours.

http://www.axtturbo.com.au/1fz-fe_45l_engine.html

What kind of changes did you have to make? Is the owner happy with the way the system runs?

 

[scottryana]

There is no real good kit on the market but all of the major pieces are out there.

- Treadstone cast manifold
- Borg Warner or Garrett turbo
- Tial wastegate and blow off valve
- AN fittings and line for oil and possibly water lines

In another thread I laid out with part numbers and costs how to do a turbo system that would be equivalent to the TRD SC.

 

[richxd87]

Below is the post Ryan lays it all out, step by step. Hoping to do this myself one day.

https://forum.ih8mud.com/threads/so-are-there-any-trd-superchargers-left.831374/page-5#post-9546362

 

[scottryana]

Thanks Rich, I am on my phone so couldn't find it.

Just remember there will also be a few things that I think are crucial that I didn't lay out in that thread like a boost gauge and wide band AFR gauge that people will choose for themselves.

 

[HDJdreams]

Below is the post Ryan lays it all out, step by step. Hoping to do this myself one day.

https://forum.ih8mud.com/threads/so-are-there-any-trd-superchargers-left.831374/page-5#post-9546362

Thanks for the link, did not see that post before.

So the stock computer and injection system will work with that turbo? I can handle putting the pieces together, it's the thought of having to deal with piggyback tuners, injectors, and tuning issues that scares me.

 

[rkymtnman]

I am in almost the exact same boat HDJ....been reading, reading and reading some more. If you do pull the trigger before me...and you happen to be in the Denver metro area, I'd happily lead some helping hands and/or shop space as needed.

 

[scottryana]

If you run that turbo at low boost like the TRD SC system the stock computer and injection system can handle it the same way as it would that system.

What you have to be careful of is that that turbo is Much more capable of producing a lot of flow. Much more air than the stock system can keep up with. That is why I suggest sticking with the 6lbs wastegate spring, monitor the AFR's and if ok possibly upgrade to the 7.5lbs spring. But 6lbs will really wake the engine up, I would stick there if you are concerned with ease and reliability.

Thanks for the link, did not see that post before.

So the stock computer and injection system will work with that turbo? I can handle putting the pieces together, it's the thought of having to deal with piggyback tuners, injectors, and tuning issues that scares me.

 

[Kernal]

Does the exhaust system diameter need to be increased over a stock FZJ80 with the turbo systems discussed above, and if so what size is best that would work well in both normally aspirated and the turbo?

 

[scottryana]

You don't have to do anything with the exhaust. In fact I wouldn't.

On an all out system, yes you would increase the exhaust, eliminate restrictions, free flow and allow the turbo to spool faster and easier, but with the stock computer setup you can not spool to high positive manifold pressures too soon as the engine will still be in closed loop and will be running too lean for high boost.

 

[Kernal]

So is there a disadvantage going to a 3" exhaust system, NA or turbo'd?

 

[scottryana]

NA - you might lose a little torque but gain a little hp
Turbo - stock computer, yes maybe, maybe not, not enough data, but if you pick the wrong turbo size and spool too quickly you could cause damage
Turbo - with fueling, ignition, and tune adjusted, absolutely not the bigger the better.

 

[Kernal]

Thanks

 

[Heckraiser]

Scottryana, since you seem to know your stuff when it comes to turbo setups and since we're on the topic:

I have been thinking about this for a few months and I can't decide what would be the correct size turbo for a low-boost no-tuning setup. My goal would be to have boost soon after idle and I don't care if it runs out of steam by 3500 or 4000 rpm since I never rev that high anyway.

The link posted above actually has a wide variety of turbo sizes from .83 a/r to 1.22 a/r. I would assume the smallest T4 turbo I can find would be best for my intended usage. I've even thought about a T3 adapter on the treadstone manifold. But would a smaller T4 spool fast enough to create the dangerous lean condition? How small is too small?

 

[scottryana]

If you want spool off idle you need to address fueling. Stock computer is looking to hold you at 14.7:1 under those low rpm low throttle positions. 14.7:1 with positive manifold pressure is going to be a problem.

 

[HDJdreams]

Does elevation affect turbo selection at all? Is it a factor in system set up? (I live at 5000 ft).