Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

X'2


@OVTune

This sucks, I was going to order one tonight before the discount end. Guess I'm buying my kings then!

 

I'm hoping orange virus and urd hook up. Sounds like this is the perfect hook up for a working super charger

 

Here's my plan guys:

I'm currently working with gadget at URD.

1) Buy the URD Spec-U system
2) Wait for my @OVTune stuff to come in
3) Send @OVTune my ECU files
4) Dyno run (Sea level, TRD CAI, 265/70r17) and Send @OVTune the results
5) Install URD Spec-U exhaust system
6) Dyno Run (Send to gadget for URD before/after)
7) Send Data to @OVTune
8) Flash with new @OVTune file
9) Maybe Dyno again

 

I was stating i was getting the same kinda results driving the same roads he was driving with the SSPro, The SSPro changes the shift mapping allows the truck to hold a specific gear longer keeping it it in the RPM range that allows this Motor and Tranny to work together in a way better driving experience, you dont get all the crazy shifting! No i am not comparing it to a tune of any kind ! The SSPro does not increase Torque or HP but sure as hell creates better driving truck! I totally want the tune to be a great product and hope to add it to my truck as soon as i can! I was stating actual results i get in my real world while driving with the SSPro! So far it's the only mod out there that actually makes this truck fun to to drive , much like the 2nd Gen Tacomas. I truly hope this OVtune becomes the best mod moving forward!

 

Honestly this is what I want and great supercharger system with supporting mods and a good tune

 

Sorry to burst everyone's dream of a supercharger or turbo but it ain't gonna work with this engine given the compression ratio. You would need to build it from the ground up and hope the drive train would handle the extra hp and torque. The best case scenario is this tune. Modest power gains and drive-ability.

 

Certainly not holding my breath for that. Nor would I really want it, I mean in this app a turbo would basically have to be mounted under the cab because of the design of the headers being almost entirely in the engine block, there's no room left to mount a turbo in there really. Even if you could, you'd still be having to size the turbo based on how much space you have and make compromises on tubing and other areas based on space.
That, or you could mount it underneath. But then you have no offroading capability because of the risk of the turbo getting snagged on virtually anything and ripped out or damaged. Turbos are sensitive where supercharger are not.
Turbos also create worse throttle lag which is probably the worst single aspect of this truck to begin with, that being the non-linearity and extremely laggy throttle operation. Not only all that, but as you already mentioned a Miller cycle engine (the proper name for a supercharged Atkinson cycle engine) is already a thing that exists. Turboing an atkinson would be several exercises in frustration and LARGE expenditures of money to get lackluster results at best.

 

I don't entirely agree with your opinion, but the only way we will find out for sure is if someone tries it. Audi and various other manufacturers turbocharge high compression engines successfully because of the ability of direct injection to help combat detonation because spraying the fuel directly into the cylinder drops temps. The Miller cycle although commonly referenced was as you said an Atkins cycle engine with a supercharger, any forced induction will create the same effect. The engine doesn't know how it's being fed boost. It would be a tight squeeze for a turbo in there but I think there is enough room to do it properly. Also a modern turbocharger with the latest technology as well as a properly sized turbo will have little to no lag if sized for that Application. For now though your opinion is as valid as mine until we see someone attempt it.

 

It was touched on earlier about cleaning the MAF sensor...
What happens with bad input from crank position, cam positions, a/f sensor, etc...in either the writing and/or use of a tune?
What about bad input from transmission sensors or bad mechanical execution, such as stuck solenoids or leaky valve body?
Do fail safes stay intact?

 

Exactly the same thing as always. If the CPS starts to fail, at first youll misfire, then it will die at stoplights, and then you probably wont be able to start it and need a new one. Its just sensors though, much rather replace a sensor than do an engine rebuild if it comes down to it. Pretty much any sensor going bad is going to lead to the engine shutting down in short order, these engines almost certainly have some sort of limp mode for when the engine starts to overheat or something like that

Also, for clarification, there is no single AFR sensor. You have the MAF sensor, which also does air quality and barometric pressure of intake tract for the ecu, then you also have both O2 sensors, engine overheat sensors, and EGT sensors which ALL combine in the ecu to form the AFR calculation. These redundancies are built in so that the engine still gets decent numbers from somewhere to protect itself even if something fails!

 

Thanks for the response.
I'm more interested in what OVTune has to say, though.

Excerpt from the QV Tune write up on the 2GR-FSE.
Closed loop is pretty basic. Target 14.7 like every other car, and also target a richer AFR when you go full throttle prior to open loop. The target AFR is 12.6x, which in reality is quite ideal for a stock tune. That's as far as Ideal goes.
When things go into Open Loop, things change. First, there is a requested Load (like any calibration) to change to Open Loop, but also a necessary desired RPM (again, like most stock major manufacture calibrations).
But then things get confusing. Toyota has this map (below, a representation of the actual stock map with data values changed to be easier to understand). Lets say these values are "injector opening time." When things go into open loop, there is a preset map that just throws fuel into the engine, 02 feedback completely stops, Not the normal, expected stop as in the 02 sensors still read but the ECU disregards feedback, but the stop as if the 02 sensors just died out completely. Total loss of all fuel sampling whatsoever. So what AFR do you get at full throttle in open loop? Who knows. (It can be determined with an aftermarket gauge of course, but seriously this is 2016 where a majority of vehicles run full time closed loop systems with full time fuel sampling.. Come on Toyota).
But wait, theres more. There is another map that comes into play when the ECU is at full load. An additional enrichment map for full Load. (the map shown is a "partial load" map). However, one small problem. Full load enrichment map is blank. Woops!

 

A tune that gets another ~25ft-lbs across the midrange ain't enough? What kind of numbers do you find acceptable?

 

Having now personally known 6 AutoX friends who have supercharged that engine, I have to firmly recommend not doing it. Most of them had the shit start hitting the fan as little as 5k miles later. Might be fine for a track only car, but the money sink is real if you DD it.

 

@OVTune turbocharged a factory 13:1 compression DI Mazda motor at 10PSI without detonation issues. DI helps a lot, and good piston design also helps a lot. Not saying the pistons in our motor are comparable, but it has been proven feasible elsewhere.

 

The three years I had mine and followed a lot on the forums people were putting plenty of miles on them and also daily driving them just fine.

 

Was it the TRD supercharger? That thing was dead reliable.

 

There never was a TRD supercharger for the frs at least not a feasible one. You had to buy like two of them and they cost like 25k apiece. Only ones I know of are the innovative/sprintex, edelbrock, vortech, kraftwerks, HKS, and Jackson racing. Those only ones off the top of my head by I haven't followed anything frs related the last 2 years

 

Was about to say this. The FA20 motor is a 12.5:1 stock CR. Plenty of people run 7-10psi on 91/93 probably just as much do E85 (for a bit more forgiving timing/tune on said CR).

 

Just want to know if thats the max you can get from the tune? 25ft lbs is fine and maybe thats all you hoped it would get! I know the truck owner did not want a maxed out tune. So yes i was simply asking or stating i hoped for higher #'s. Nothing wrong with more information! The 25ftlbs on an all stock truck is probably good , but i have alot of mods making my truck heavier and larger tire's so yes was that the lowest tune ,is there a mid level tune? A max Level tune? Maybe you can get 35-45 ft lbs more at a different level level tune not asking isn't very smart! I a may want to do a gear change in the near future , but if this tune adds what i need then i can hold off on the more expensive gear change!

 

You're talking about a NA 3.5L V6 engine. Not a forced induction motor or a big displacement V8. +25ft/lbs tq on a NA V6 at this size is already quite impressive. I think you're overestimating what a tune can do [on this size motor].