OVTune 3.5L Tacoma Supercharger and Twin Turbo Systems

When drag racing you’d gear to the rpm you’re looking for down the drag strip, specifically.

when daily driving I always gear to put the engine in its power band as much as possible.

 

This is what I expect for a daily, and is the crux of the issue with our trucks. The power doesn't exist until 3500rpm but the trans wants to be below 2k.

 

you’ve got to be pretty close to 2400 rpm in your truck that has 4.88s....definitely above 2k at 75

 

6th gear on the MT you're at 2500rpm at 75mph on stock gearing and tires.

 

Uh oh.

 

I believe you've taken a statement out of context. The discussion was about cruising and I interpreted it as you'll prefer lower RPMs for cruising and MPGs.

 

Sounds like there will a good mix of AT and MT with stock 3.90's/4.30 and 4.88's or 5.29's who make the plunge with the OVT TT kit. Should be interesting to hear feed back regarding driving experiences. Since this is my daily driver, I have deferred changing gears in anticipation for this TT kit to see how it drives. Otherwise 4.88's would be a no brainer for my Taco without boost.

My OV tune is stored on my work Dell laptop (unfortunately my personal is an Apple laptop). Looking to buy a separate PC to store the OV tune and new TT kit tune on. Anybody recommend a good, reasonably priced laptop specifically used for this purpose? Thanks.

 

I just setup bootcamp on my MacBook. Been using it for 2+ years

 

I’m currently running 33’s on stock gears with an AT. My plan is to run the TT kit for a couple months and see how the fuel mileage/power is as well as other people’s experience with the TT kit and 4.88’s. If others report better performance/ and or mileage then 4.88’s will happen this spring.

 

Solve it with bigger turbos. I’m kidding. Waiting for this kit to be released.

 

I'm aware of the context.

Cruising at 75mph puts me at 2500rpm at the moment.... I don't understand why 5th and 6th are geared so close...

 

This!

 

Cause im stock format the engine can barely hold sixth at high speed as it is. If it was geared any higher you wouldn't be able to use it at all.

 

Driven enough turbos, enough trucks, enough Tacomas.. ... absolutely 4.30 in the MT will be fine with turbos. But I maintain now driving my 4.88 MT NA for 1.5 months, twin turbos would be awesome. Broken record am I!

 

I'm convinced Toyota got the 5/6 gears mixed up between the AT and MT.

 

@OVTune have you done the compression testing yet? I'm curious

 

Just to say its a 6 speed
with 35s and 4.30s it becomes a 4 speed lmfao

 

compression tester, new plugs and such are on my desk.

Haven't updated this in a bit, a lot of the time spent has been dialing in this fuel pump controller.
a lot of signal processing/filtering was necessary as we were getting between 20 to 40 second "duty" time in the span of 5 seconds. So that's been fixed.
So...our fuel pump controller code takes multiple measurements the ECU has sent, filters and averages them, does a sanity check on values, then calculates the duty cycle for the pump



FYI
stock fuel pressure release valve is 95 psi
The sucky part is the stock fuel pump controller does not get to see fuel pressure as a value.
instead the ECU sees fuel pressure calculates duty freq.
Then the stock fuel pump pressure calculates the necessary energizing charge bullshit. bullshit.
So pressure is an emulation based on quick changes in ecu frequency.

pain. in. the. ass.


here is what our fuel pump control look up duty would represent.
these values are stock PW * VAL

 

Out of curiosity, would there any reason to monkey with the fuel pump controller/pressure on the non-turbo tune or just an issue for the more serious requirements of boost?

 

I would think it's more of a thing for boost. More boost means more air which means it'll need more fuel. Even if you mess with the controller on non-boosted it wont be near the same scale as you would with boosted applications. Kinda like how they make tunes for the 5.0. Gives you like 30hp but nothing near what a turbo 5.0 could produce.