Originally Posted by MRY (Post 4349198)

Will this allow me to extract a base map, keep a copy, and modify it to my liking and then flash the Ecuador with my own tune?

Or do I have to use your map choice?

Thanks

Originally Posted by cret (Post 4349225)

Stu, is it possible to upload newer version of the tune files (if/when available) to the unit? Thanks.

Originally Posted by Stuart@VelocityAP (Post 4349429)

Just to make sure I understand the question - do you mean that if we come out with some software revisions down the road, you can still upload them with this device?

Originally Posted by Stuart@VelocityAP

It will not allow you to produce your own tune. You can however still specify customizations to the maps that you would like pre-loaded onto the V-Tech Tool, within reason.

Originally Posted by MRY (Post 4349806)

I'm trying to avoid using a Pectel MQ12 or Motec 880 and rewiring stuff and figuring out how to keep the OBD2..

After I figure out the max mass of the mafs, then I hoped using your unit I can adjust the fuel and ignition tables and be happy with whatever additional air I choose to insert into the engine with some little turbines (to the max limit of the maf and lambda target to keep the detonation gods at bay..) :D

I hoped your unit would allow changing the fuel and ignition tables to my chosen values.... :(

Originally Posted by MRY (Post 4349806)

I'm trying to avoid using a Pectel MQ12 or Motec 880 and rewiring stuff and figuring out how to keep the OBD2..

After I figure out the max mass of the mafs, then I hoped using your unit I can adjust the fuel and ignition tables and be happy with whatever additional air I choose to insert into the engine with some little turbines (to the max limit of the maf and lambda target to keep the detonation gods at bay..) :D

I hoped your unit would allow changing the fuel and ignition tables to my chosen values.... :(

Originally Posted by rmrmd1956

Tables list each MAF's max at 32 lb/min but the limiting factor is injector size followed by MAF size followed by Fuel pump. Injectors are about 35lb/hr at the system pressure of 55psi and fuel pump will go to about 6-6.5 lb/min at system voltage of 13.5-14V.
You can figure out the HP limits with a little math

Originally Posted by Stuart@VelocityAP

Within reason, we can change this stuff to suit your needs, but it has to be done by us, not by the customers.

Originally Posted by MRY (Post 4350099)

Thanks for the notes on the maf limit.

Are the tables for the maf from the workshop manual or something else like a Bosch data chart? Does the data source have the voltage and associated air mass for the maf from 0-5v?

I'm not worried about injectors and fuel pump as they are easily compensated if I need additional fuel above 100kpa.. For example, the Bosch part number can get me the injector rating at 3bar, which I prefer as a baseline vs 55lb or almost 4bar. A Hobbs switch can activate a secondary pump if needed, or a voltage controller can overdrive the main fuel pump.

However, I wanted to keep it as stock looking/function as possible, so if the maf has headroom, I can scale the injectors according to the fuel need and only add a secondary pump or overdrive the primary pump with a voltage controller if needed. (The ecu may also have a fuel pressure sensor that would throw a code if the pressure is tweaked too much, so another reason to keep pressure in stock range but increase volume if more fuel is needed.)

Depending on the maf algorithms, I can modify the fueling tables as a function of the maf voltage if more fuel is needed based on my desired lambda targets. With past mods in other cars, I have always found the maf to be the biggest issue in keeping the oem ecu, not the injectors, as they are very easily replaced as is the fuel pump. The signal of the maf and corresponding fuel table value actually are what I am after to modify, as this function is what drives the injectors and duty cycle. This can be a log function or linear function, and in the Aston ecu, I don't know how that is written.. That's why I was hoping that I can use a tool like the velocity tool to rewrite the fuel maps and ignition maps in line with a maf chart.

I am also curious if anyone has been able to extract the ecu data logs and see what is stored. Then again, it might be easier for me to hook up my Motec data logger via the obd port and attach a wide band lambda sensor to the car and drive around for a few hours and get some data....

Ok, enough rambling on my part..:rolleyes:

Stuart, sorry for hijacking your thread,

Best Regards

Originally Posted by rmrmd1956

yup, been there, done that. Easy solution on the MAF is to put them in 3inch tubes and tune the MAF table. Ford racing injectors and boost-a-pump will get you to 650-700 Crank HP. Knowing how to do it is the trick. I had to figure it out for myself and its a lot of work. My recommendation is use a tuner for custom tune - Stuart is the MAN.
See https://www.6speedonline.com/forums/...h-control.html

Originally Posted by MRY (Post 4350164)

I am glad you're in agreement on re-inventing the wheel..

I wonder if Stuart's tool can jig/scale the maf table to work with new injectors... This is exactly what I am after.. :D

700chp is livable.. I can probably go to 800+ using turbines, without increasing peak cyl pressure more than 10% so everything is within stock parts tolerances. My buddy's CL65 Amg renntech has 700 chp and barely breaks a sweat. ;)