3.4 twin charged

There's a reason the fasted Tacoma's dragging have boosted K20's and 1JZ's.

 

Yuck, rather have quick revs and a Toyota motor

 

Damn guys thanks for all the reply’s . From what I’m reading it just seems like selling the charger and running a turbo is the way to go. Just wanted to go twin charged to have the benefits of both and be able to keep up with newer trucks. I didn’t wanna run high boost at all because this is still my daily . What size turbo were you running with the sc?

 

Just keep the timing low until higher rpm and higher compression should be fine.

 

Even into 60 psi? Hypothetical at this point

What compression would make sense then?

 

At 60psi you'd have to find a different block and a better way to bolt heads to it. The 3.4 is pretty weak in the grand scheme of things.

 

Not even with a girdle and getting sleeves? With ARP's custom age 625+ materials? Or increasing the diameter of the bolts for higher torque specs?

 

It would need a very substantial girdle and there isn't enough block to secure it. Features are pretty thin, containing the harmonics of a 60° v6 is one thing, being rather unbalanced, but you'd be battling every part of this tiny engine getting to hold so much pressure. You could upsize the studs two metric sizes and still have clamping issues due to the distance between studs and the stress risers created by overclamping a soft head into thin iron. Then there's the volumetric issue of 60psi flowing into and then out of the engine. The intake and exhaust ports, even majorly ported with oversized valves as big as the head would allow (the heads are thin castings from combustion chamber to cooling jacket) would be huge restrictions even if you removed the quench area for more valve clearance. The exhaust ports are just small for that kind of flow, you'd have the issue of generating the boost but the performance wouldn't match because the volumetric efficiency is too low. Let's not forget that even the simple parts of this project don't exist, would need a forged crank, some type of reinforced rods (h-beam), pistons exist but 60psi in a tiny V6, shit I don't think you could use hypertuectic pistons without destroying ringlands... So those would be custom too. Then you run into heat issues, the 5vz doesn't have piston squirters and it's a closed deck iron block (good for boost in theory, but this one's design doesn't lend itself to cooling a huge load), you'd fight hotspots and pre detonation. Hell I can't even imagine the fuel with enough octane to run in this, maybe one of the jet fuel, alcohol mixtures that top fuel use. Maybe just nitromethane. It's just not enough of a platform for people to have gone beyond what you can make with a well polished tune and an appropriately sized turbo. Could get plenty of power out of it for what it is, but it's never gonna be a nitro methane boosted rocket.

 

Well thats a bit disappointing, If I won the lottery though... Perhaps a set oof custom heads with extra head studs per cylinder and MANY custom parts would do it. But at that point its past what I was hoping for.

How much do you think you could get out of the block with forged rods, pistons, arp custom studs and bolts and a healthy amount of porting? Also with sleeved piston walls. Perhaps even adding a girdle and dry sump?

 

Some fun info here:https://www.customtacos.com/threads...-the-weak-links-i-will-run-into.154894/page-4

 

https://www.tacomaworld.com/threads/aem-fic-6-piggyback.713054/

 

Shameless plug?

why go fic8?

 

My laptop auto updated and I was locked out of the Fic6. I need the truck drivable and was worried messing with software updates would lose my tune and I would have to start over.

I ordered a new Fic8. It's plug and play with the Fic6 harness so I knew I could swap computers back and forth if needed. I got the truck running on the 8 and then did firmware updates on the 6. Everything is fine and my tune was even still there.

The Fic8 can run a 8 cyl engine (not that I need that, but maybe one day)
It also has a boost controller, Iat sensor and more internal logging capabilities.

Ultimately I didn't need to do it, I am very happy with the Fic6, but now that I'm on the 8 it's time to let it go.

 

Stock iat sensor work?

 

Also: can you use one of the extra injectors as a 7th?

 

Stock Intake temp isn't in the Fic dashboard. It may be possible to wire it in somehow, but idk. Stock Iat temps can be seen on Obd2 readers like Torque App or Ultra Guage ect.

The injection part of the Fic can either tap into or intercept the stock injector wires. You tap in to sense the signal, then use that to run an additional set of injectors when necessary. Example the Urd Port Fueler secondary fuel rail system.

You intercept the signal and modify it if running larger injectors in the stock location.

You wouldn't want to Tap 1 signal wire because then your 7th would only be spraying 1/6th of the time, basically only when the taped signal wire is getting its signal from the stock ecu.

 

So if you wrote a program... perhaps you could get it to spray the correct amount (give it a signal)

Hmmm well anyway, how is the cx racing turbo manifold? Is is terrible for flow? Also once you did add a turbo, is increasing the MAF size good or is it not a restriction at all? (Say at 15-18 psi)

 

7th is good for Trd supercharger. Urd has this covered.

The Cx stuff isn't great, but will get you going. Wastegate is on the the wrong side of collector. Velocity profile is on the outside of bends, not the inside.

Technically increasing the Maf is good, if it is in front of the turbo, otherwise unnecessary. This will meter the airflow, but not account for the temperature after the intercooler. It will also limit compressor intake volume, and not account for density after the intercooler. My maf is after the intercooler, before the throttle body.
The Fic6 and 8 use a Map sensor (manifold absolute pressure sensor). So the Maf is kind of secondary if you want. You can clamp the maf signal so the stock computer knows nothing. You continue to tune for load (or boost) via the Map map.

 

Thought I saw that clamping the maf got tuned out or had problems? I was asking because if the motor wants more air, the maf is the only thing keeping the intake small

 

Hey man so is your fic 6 shot ? I’m def interested in buying it if you have everything for it , you said you were using the wiring harness though so would I have to get one . My plans with the cx racing setup was to just get the manifold and down pipe and outsource everything else