Hi All,


I need assistance.


Basically my understanding of E85 flex tune is that there are supposed to be 10 maps on your ECU. (Correct me if i am wrong) i have heard this from other tuners as well and also the place where i got my car tuned at informed me as well/



Basically i got my car tuned for E85 Flex, when i spoken with the tuner he mentioned there will be 10 maps however when i took my car to my previous tuner he plugged his laptop into the ECU and said that he can only see two maps and not 10.


I have asked the tuner who did the flex tune and asked him why is there only 2 maps and not 10.


This is his reply


the way a full flex tune works is We do a 98 Map and a E85 Map and we have other tables and scalers to adjust for the interpolation between all maps I.e - Injector / timing and boost maps. So we make adjustments for E10, E20, E30..... it works by 10% increments. This is the only way to do Flex fuel tuning and it’s done the same way on Motec Ecu’s, Link, Haltech, Emtron Etc.




Can someone please confirm if what he says is true or not.



I thought it would be 10 maps and not the scaler, also with the scaler are they actually running the car on the dyno because they said to me they will run the car on the dyno at each 10% increment


There was another thing with the TephraV3 tune that he said was corrupted when he tried to plug his laptop in. however i wont mention is in this post


if anyone can confirm the above that will be greatly appreciated, i think i got scammed but i just need to confirm


Thank you

 

Hi, following is writtern assuming that you are using TephraXMOD V3.

TephraXMOD V3 has 10 tables(one stock map and 9 alternate maps) for tuning non flex fuel mode.
When using flex fuel mode, you can use just 2 maps ( stock map and alternate#1 map ).

When flex fuel mode, stock map is tuned for E0 or E10 and alternate#1 map is tuned for E85.
Depending on the output voltage of your flex fuel sensor, ECU determines the values of fuel, timing, and boost tables by interpolating between these two maps.

Don't worry. His answer is mostly correct. To precise, you can see 10 tables but only two tables are used when using flex fuel mode. And when flex fuel mode, ECU interpolates fuel, timing, and boost tables. Not injector table.

 

Thank you for the reply.

Thats a relief