UNICHIP Install and Evaluation

When I hit the dyno Ill post it. If you are talking stock gains, its probably around 20HP I would imagine

 

The problem with an alterate map for lambda signal based on MAP is if you switch to it at positive boost, for some area of the map you will be sometimes in close loop and sometimes in open loop in the transition area and you need 2 different settings for the same cell in the map.

If youre doing search for it, can you check if your lambda map (based on boost) can be "on" in close loop (Signal = 0) and then switch off in open loop (signal=1) and have your standard fuel map on in open loop. This way you could obtain best of both world and not having to take care of transition area.

 

There is a way to switch maps based upon signals or voltages. I am almost sure I could set up an option to switch to a richer map upon boost but as you mentioned the stock ecu will try to get back to 14.7. the end result would be richer but also trigger CEL due to LTFT being too rich or negative for too long.
then there are Clamps for fuel too that may help with that but best solution would be to manipulate O2 signal to fool stock ECU into thinking its at 14.7 when its really at 12-13?

 

I still have to mess with those...
Some of the options you have to run extra wires...
I need some time for another tuning session...

 

The clamps lock the max voltage but if your total settings exceed 4.9 the system will be maxed out so you will need bigger injectors or higher fuel pressure ect so you don't run lean...

I'm running 4.2 so I'm well under...

 

I have 800cc injectors and a bigger pump. Just trying to figure it all out...

 

Plenty of injector there.

 

Ok so I had to tow my trailer filled with my moms stuff maybe 6000lbs total with a 16 x 7 enclosed trailer...........
Had to tow from WI to MI about 6 hours............

So running the maf cal for fuel and the unichip for timing...........
I'll have to say it tows great............
With the bigger exhaust and 32" tires still kills some low end so it wouldn't stay in 5th but towed the whole way 4th with no problem up hills at 80....
The intake spacer does help give back some torque........

The taller tires throw the gearing off for towing but only down sifted when I use cruise control......
It used to down shift to 3rd a lot and some times 2nd not any more........
I think I averaged about 8.5 mpg both full and empty so the weight in the trailer made almost no difference in mpg......

Get a trans cooler.....
I added a trans cooler and by passed the radiator and it was still hot maybe 180-190......
Running the dunes it never goes over 170 any more, stock well over 200+ degrees and I burnt the fluid once.......

Summary, extra timing and fuel help the truck tow...............


After towing, to the dunes..............

 

Next step, to remove maf cal.........

I finally removed the maf cal.....
The problem was the unichip and maf cal were fighting over the usb port on my computer, so it took for ever to get the unichip to work and now I'm having trouble re flashing the maf cal so it's out for now........
With the maf cal on I could only slightly change the power with fuel but the mpg stayed the same no matter what I did.... 15-16.....
The maf cal had course adjustment and a pain to re flash but made great power........

So for our Colorado trip I'm just running the unichip to see if I can make some better fuel maps.......
I have a 2 map switch and you can change the map and re flash in few minutes with the unichip.......

The goal is to have a map to get back to 17-18 mpg and a power / towing map...

The very first thing un till I get the maps sorted out is instantly it has less power....
But I may be way too low on the fuel numbers, I have to convert from maf cal numbers to unichip......

So a work in progress..........

 

Last pieces for Colorado.....

 

Colorado up date:

There is no way to improve the mpg using the unichip as of yet.....
I tried a lot of maps and the best result for mpg was a balanced map with just a little extra fuel...
if I take out too much fuel it gets worse mileage and adding more give you power but even worse mpg.....
I made a mountain/overlanding map and off road I was getting a lot better mpg than with my power map....

At the dunes you need max power but the rest of the time you just need it to run good and not eat gas....
My power map gets about 10 mpg off road and my overlanding map about 14 mpg...

Also my MAF sensor died and I had to replace it, it was acting crazy but I fixed it....
My map wasn't off that much.....

I think my tires are wearing out because the maps have almost no effect on mpg on the road....

I just put on new 285 70 17 ST Maxx tires so well see what happens now...
new but bigger tires.... They ride much better, those AT3 are stiff...

 

Do you have an aftermarket FPR? Higher fuel pressure atomizes fuel better, which equates to a more efficient burn. Therefore you'd have to pull fuel, since the higher pressure will add more. You could theoretically get better mileage because of the more efficient combustion, and needing less fuel to create that.

 

No, I may have to look into it, or just deal with the mpg...

 

Had one, monkey'd with every setting and swore it did nothing.

 

So took the truck to the MI Silver Lake sand dunes with the 33s for the first time....

Hit the the dunes with the mpg map and 33s and no grunt at all...
switched to the power map and instant power...
A few maps later and it was running really good..
The unichip is fast and easy to tune....
The 33" st maxx dog the engine a lot more than the AT3 32"...

Power is real good...
And the ST Maxx are great on the dunes...

Economy still sucks, but added the 33s and I get about the same MPG and almost the same acceleration.....
Can't find a way to get good mpg yet but better than the power map and now I have 33s grrrrrrrr....

Still working on it.......

 

OK, It's truck time again, my summer car is the FRS so I have been tuning that all summer but my back can't take any more rough roads with stiff suspension so I'm getting the truck out and have already loaded up a handful of maps...

I had a bad MAF sensor in Colorado and had to buy a generic one and now I have a Toyota part back in...
It drove fine but the cold idle was crazy high....
I also had a corroded wire going to my MAF sensor....

So we are all fixed and I had to adjust my map now that everything is fixed...
The Unichip corrects for mods very good to get the computer back to normal fuel trim and adds timing...

Now I'll see if with everything fixed if there is a way to have mpg map that gets better mpg on the road..
Off road my overland map gets 12-14 mpg and my power map around 9 running trails and stuff...
On the dunes you have to run the power map for the power...
So off road I know you can make an overland map to conserve fuel and not make the throttle too touchy..

Now I will see if I can get better mpg on the street... But the rolling resistance on my truck compared to my FRS is crazy so we'll see...

 

I'd like to buy the software for programming my Unichip Q for working properly with E85.

I'm thinking would the Turbo Module or MAP Sensor be a good add to the kit, because I have TRD Supercharger.
But would it work with Q, or should it be Q+? No need for any other input than MAP sensor signal.

 

Seams like you will need the Q+ for the extra input, I would call them, there are also programmable inputs you can add...

What f/a ratio does the reflash set for part throttle? That will be your weakness with the unichip, the closed loop settings..
It will correct back to the factory setting but you can only cheat in a little extra fuel...

I don't know if they have a E85 kit, on the FRS for the ecu tek there is a sensor and special map to convert the % of E85...
You may just have to have a E85 map and switch back and forth..

 

Yes, I have sent email to them, but didn't got answer yet.

I have not reflash, it's not possible here in Europe. That's why I have Unichip. A/F keep close to 14.7 in closed loop, go down to 12 in open loop and rises a little while acceleration. I don't know would the TRD reflashed ECU understand acceleration and give richer A/F in closed loop too? Do you? It's not so nice to see 14.7 while you have quite amount of boost in the manifold. You said it's a weakness with the Unichip, closed loop settings, but with the software, would I get it adjusted so well that it keeps in there (12.5-13.5, depending of the boost) too?

Edit: Got the answer:

 

I picked up a Unichip this summer used on Kijiji in the hopes of using it to build and tune a customer turbo setup for my 06 prerunner style build. Lucky for me I only paid $160 cad.

I have a decent amount of tuning experience with motorcycles/atvs using different fuel controllers and wideband sensors.

From what I can see the Unichip will essentially only allow tuning maps to work in open loop mode(website says will work in closed loop) and everyone is unable to create maps that will function at low throttle closed loop mode.

I don't want to spend the money on their software if the Unichip will not function in closed loop with custom maps, as it would be pointless and risky to build a high boost turbo setup if the stupid ecu keeps trying to hit 14.7.

Has anyone just tried to unplug the AFR fuel sensors? Would this not just force the ecu to stay in open loop mode and allow you to use your Unichip maps the entire time pulling info from MAF. The stock 02 sensors would only be narrow band anyways and most like only have a range of 14.7/1 +- 1AFR ish within the 0-4.9v range. This would make tuning with stock sensors useless for boosted tunes with richer setups below 14:1 and useless for lean highway cruising setups above 15.5AFR.

It would make sense to use a 2nd device like a wideband AFR sensor to watch the readings on the fly. They can usually read down to 8:1 and up to 20:1. Building a tune and data logging would be a pain but it would work I think.

If the stupid Unichip had an input for a wideband 02 sensor it would be an amazing tool for tuning and on the fly map switching, but unless I can get it to take over the mapping of the fuel trims the entire time its almost a useless tool.

For anyone that has tuned a motorcycle using a Power Commander with auto tune you will know how easy it really should be!

Other then Unichip is there anything else out there that can intercept or allow custom maps tuning for the 05+ Tacos?