VF Tuner ECU/TCU Tuning for the GX550

[VF Tuner]

From past experience wouldn't changing the flash on the ECU require a less restrictive exhaust and intake? If you're dumping more fuel it requires more air intake which will increase exhaust back pressure.
That said I am old school from the mid 60's to mid 80's when we used blowers, high rise manifolds with dual carbs. To get the performance we wanted we had to free up the intake and exhaust.
Just wondering.

We are not dumping more fuel, as a matter of fact we are reducing the fuel. In stock form the ECU dumps insane amounts of fuel in boost.

 

[vraa]

I think I did my tune successfully, aside from butt dyno any way to confirm?

I will need to add some E85, I don't think I can get 93 here in OKC

 

[vraa]

I think I did my tune successfully, aside from butt dyno any way to confirm?

I will need to add some E85, I don't think I can get 93 here in OKC

I had some issues with some lights about a misfire, I emailed VF Tuner, they taught me how to do the reset, will try that later today

I can feel there is a lot more power from a stop

 

[munkeeboi]

Finally got a free day to back up the stock ecu and what do you know, my can bus cable wires are busted. Has anyone got their replacement set yet?

 

[VF Tuner]

Finally got a free day to back up the stock ecu and what do you know, my can bus cable wires are busted. Has anyone got their replacement set yet?

Email us we can get you a new one out tomorrow morning. We have plenty of the components in stock now.
and are making them more robust.


But I still want to warn everyone CAN is just 2 wires, excessive twisting can still break the wiring. (I am not blaming nor saying anyone is doing this, just a future FYI)

 

[thangcu35]

I tried to flash the 93 oct map this morning, however mid way it got an error stating that vin cannot be read and the flashing failed. Now the ecu cannot be prepared and cannot read VIN. The car can no longer be started or driven either since I suppose there is no tune on the ecu. I have successfully flashed the 91octane map just an hour before this occurred, so everything was working fine up until this point. Can you advise?

 

[VF Tuner]

I tried to flash the 93 oct map this morning, however mid way it got an error stating that vin cannot be read and the flashing failed. Now the ecu cannot be prepared and cannot read VIN. The car can no longer be started or driven either since I suppose there is no tune on the ecu. I have successfully flashed the 91octane map just an hour before this occurred, so everything was working fine up until this point. Can you advise?

Email us please, you will need to do a ECU recovery, it's pretty easy.



Also for everyone else, please email our support if you need troubleshooting assistance or have issues.

And for nearly every issue / troubleshooting, there is a resource guide on our forum

https://cdn.shopify.com/s/files/1/0885/5830/files/ECU_Recovery_Manual_PDF.pdf?v=1702466651

 

[thangcu35]

Email us please, you will need to do a ECU recovery, it's pretty easy.



Also for everyone else, please email our support if you need troubleshooting assistance or have issues.

And for nearly every issue / troubleshooting, there is a resource guide on our forum

https://cdn.shopify.com/s/files/1/0885/5830/files/ECU_Recovery_Manual_PDF.pdf?v=1702466651

Thanks for your prompt assistance. It’s back up running well.

 

[VF Tuner]

Hey guys here next week we are releasing updated 91 and 93 tunes, as we have wrapped up some additional Dyno tuning and testing.
These dramatically increase torque under 4000 rpm.

 

[thangcu35]

Hey guys here next week we are releasing updated 91 and 93 tunes, as we have wrapped up some additional Dyno tuning and testing.
These dramatically increase torque under 4000 rpm.

Were the dyno tuning done under the Tundra platform? Interested to see the dyno gains on the gx550 with it being 4WD.

 

[munkeeboi]

My guess is that is was done with the GX since I think I read that they have an in house GX for testing now, but that is just me being hopeful. Can’t wait to hear back from VF tuner.

More torque under 4k sounds sweet to me

 

[munkeeboi]

Just for confirmation, should we be choosing the Toyota gen 2 template in the drop down choices?

 

[Mainelexus]

Ok keep the reviews coming. Got my wife out of this into her car so I can start driving it now so it is time to man it up a bit. Sorry if that offends anyone.

 

[Mainelexus]

Ah heck with it, just ordered one. Now I need to figure out the best front winch bumper and patiently wait for the long range america fuel tank to be available.

 

[VF Tuner]

New tune versions are distributing tomorrow. with a bunch of info about the update.
Thank you everyone

 

[Mainelexus]

Could you give your recommendation

 

[VF Tuner]

Could you give your recommendation

I am sorry I do not have any front bumper recommendations.

 

[VF Tuner]

Just for confirmation, should we be choosing the Toyota gen 2 template in the drop down choices?

Toyota Gen4 2.4/3.5 turbo template

 

[Mainelexus]

lol I was referring to which specific tunes you would recommend. Which give you more hp, is there a reason to go with 87 octane tunes other than the gas savings, that kind of stuff!

 

[VF Tuner]

lol I was referring to which specific tunes you would recommend. Which give you more hp, is there a reason to go with 87 octane tunes other than the gas savings, that kind of stuff!

87 octane = similar to, or a bit more power than stock, saves a bit of money at the pump. MPG differences have not been tested, I wouldn't expect noticeable MPG differences.
91 octane = significantly more power than stock, similar to stock like MPG (if you drive it normally), slightly more MPG at low load / cruising / out of boost
93 octane = ridiculously more power than stock (on our latest test we see 75 WHEEL horsepower gain at 5500 RPM, and just a fat curve everywhere from about 2400 rpm). Noticeably better MPG than stock (out of boost) due to the ability to run more ignition.

87 tune is going to give you a little power bump + saving a bit of $.