OVTune 3.5L Tacoma Supercharger and Twin Turbo Systems

TurboS

You had one job!

 

looks good, I’m going this way...

 

I do like that muffler bypass actuator, I missed that in the first post.

 

Thanks!


DP all wrapped and converted to VBAND


Holy piping Batman



DP is tight. Will do more heat shielding but the wrap will definitely help



I/C piping just mockup. Will powdercoat when done and switch to all black couplers. 1.75” turbo out to 2.5” runners- merge to 3” Y to FMIC

 

How is the fitment on those PTP outside blankets? It looks like a good fit.

 

Great! Little tight against the valve cover but nothing major.

 

Looking great! Dual MAF’s???

 

My guess would be that he is going to put only one between the throttle body and intercooler since i don't see them on the intake pipes. Thats a long and straight enough run for it to work post turbo. It's called blow through MAF. This is what I am considering doing.

It just has to be on a straight and long enough pipe for the air to smooth out. I think the math is 3x as long as the diameter of your pipe. It's a little more tricky to do but it's common (especially with people who run atmospheric bov's) and does work if set up properly.

 

Did you use 321 for that? I've generally never liked the idea of exhaust wraps because of water/dirt retention. I have no evidence of this actually being a problem. Do you live in a wet climate? Have you had any issue with something like this?

 

Well I hope that works, was wanting to go that route as well. Hopefully MESO or Mat will jump in to confirm.

 

So when do you do the supercharger with the twins? Just asking for a friend

 

To test MPG and 6th gear driving, I did 100 mile trip this morning.
All highway.
Entire trip was in 4High with gear lock, and torque converter locked. To produce the worse results possible.
I did not leave 6th gear once. Including going up hills that would require 4th gear on a normal truck.
MPH testedfrom 65-80mph.
I can, with ease, increase speed up hill in 6th, from RPM as low as 1500.

I modified the tune slightly so that you can smoothly accelerate in 5th or 6th from RPM as low as 1400.

MPG test report: 20.9 mpg.


I also have a full datalog I will post today that shows our fuel pump controllers pressure stability, increase rate, etc that was captured during the trip.

Just wanted to give you guys and update that it is running phenomenally in all test conditions, even absolute terrible conditions: uphill, 6th gear, 1500 rpm, full throttle. No problem.


Unfortunately we have been having terrible weather and flash floods so serious off-road testing is limited.
When there is a good enough day we will test at Patriot mountain and post some videos and results.


I will also post a brief explanation of how our fuel pump control code and algorithm works so that it actually thinks ahead, to ensure that there is never a pressure dip under any circumstances. It works so well that we may make this a standard item for trucks regardless of boost or not.

 

Do you have stock gears?

 

How does that MPG compare to stock for your truck?

 

Ahhhh, in 4H using only 6th gear? is this a scenario you plan on driving much? /s

 

No shit it’s not, but if he’s getting 18 driving in 2WD on the highway then that says a lot about the tune and setup.

 

Any improvement in fuel mileage along with added horsepower and torque is a plus. I don’t know enough about modern engines and tuning to debate a single thing. Sadly though there are just too many variables to speak of what can happen to each individual truck due to physical components, elevation, temperature, and driver plus more I may not be thinking of.

All in all I enjoy seeing the product come along. One day I hope to see an available product that can ultimately be ordered, installed, tuned, and driven within a 2 week time frame most of which down time comes from the product being installed vs wait time from developer. Best of luck to everyone involved on front end and back end of this venture as well as people who are in process of getting parts and installation. Hope everything goes without a single hiccup and this turns out to be huge!

 

So onto the fuel pressure control.
here is our log snip




Target base pressure is 48psi with a +/- 3psi tolerance. (steady state)
Pressure change is dynamic, and can change 5, 10, 20, 30 psi depending on demand.
Using our algorithm the fuel pump controller will ramp pressure from 48 all they way to 80psi.
this is done on the fly based on calculated rate of change in fuel pump requirement with a 2ms response time.

Our fuel pump control algorithm maps, smooths and stabilizes the raw output signal from the ECU.
The signal is sampled 4 times.
This signal is then fed through a secondary smoothing and duty cycle algorithm.
The current duty cycle is then compared to the incoming signal to calculate a rate of change in expected duty cycle. This is to ensure that there is zero delay in increasing fuel demand when it is ran through our duty cycle algorithm
Depending upon the rate of change our code will calculate a trim factor to apply to the duty cycle.
There are 6 different mapped out trim factors that apply depending upon the calculated duty change rate.

This trim factor is then applied to the current and upcoming duty cycle, so that when you stab the throttle and the engine requests more fuel, the fuel pump controller has already calculated the increase rate by the time the ECU starts demanding the extra fuel.

The result is a steady cruising pressure with near instantaneous pressure increase with throttle and increased fuel requirement.

The pressure will also be trimmed off after a high load event (say burst, 70+psi) happens down to 30psi (decel).

and it is working fantastically.
You can also update the firmware right from home as well if it ever needs updated

 

When you said you would be posting a log I assumed you would be posting a .log file or perhaps a CSV.

Sorry to be so needy but do you have a larger screenshot?