Lund Flex Tune First Impressions on 93

[stangman638]

How many miles have people gone on the flex fuel tune? 30k 40k 50k? Would like some feedback

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[DarkestHour]

Can that be monitored through the PIDs? There seem to be a variety of throttle signals.

Yes, pedal and etc_actual. They aren't a 1:1 mapping though as ETC stops at 85. If it bothers you, Lund will switch it back to the stock linear throttle mapping if you ask.

 

[beefcake]

like was said, flex and straight are very similar, the flex just allows timing to ramp in a bit sooner. the nice thing about flex is it does maximize whats in the tank. so, if you have a batch of 93 that contains a higher ethanol content, the car will adjust for it, same if you get a batch of e85 that is more like e50 on the flip side.

as far as loading time. i've never seen an ngauge take 30 minutes to load. thats more like sct time. the nguage file copies to the gauge in about 30 seocnds, and flash time is about 6 minutes. initial if it's downloading a stock tune may double that, but we have never flashed a car and had no where near that amount of time.

def more user friendly than the sct!

 

[Bluemustang]

Yes, pedal and etc_actual. They aren't a 1:1 mapping though as ETC stops at 85. If it bothers you, Lund will switch it back to the stock linear throttle mapping if you ask.

When I asked Lund about it they said they do not change the electronic throttle mapping. That's just what they told me. But, the stock tune is far from linear actually. It's really about the pedal position vs. torque demand anyway.

 

[DarkestHour]

When I asked Lund about it they said they do not change the electronic throttle mapping. That's just what they told me. But, the stock tune is far from linear actually. It's really about the pedal position vs. torque demand anyway.

Mine was changed, but I'm a manual. Stock is 100% linear for Normal drive mode.

 

[BmacIL]

Mine was changed, but I'm a manual. Stock is 100% linear for Normal drive mode.

Yeah, but it's not linear. I know this to be 100% true. It's pretty far from it. It may feel linear but it isn't. This info is straight from the supervisor in charge of 5.0L engine calibration. It's actually almost the same as the aggressive/sport Lincoln driver demand. Linear would be nice but it would get too many people who value tire roasting from tip-in over smooth control thinking it's not very powerful.

 

[michail71]

Yes, pedal and etc_actual. They aren't a 1:1 mapping though as ETC stops at 85. If it bothers you, Lund will switch it back to the stock linear throttle mapping if you ask.

In another thread on here someone mentioned Lund doesn't change the factory throttle mapping. I did find 4 throttle parameters that I have on the 6 signal display. One pair seems about equal and the other 3-4% higher. I'm not sure which those are but I'll check later today.

** edit **

Oops, already discussed here as well,

 

[michail71]

like was said, flex and straight are very similar, the flex just allows timing to ramp in a bit sooner. the nice thing about flex is it does maximize whats in the tank. so, if you have a batch of 93 that contains a higher ethanol content, the car will adjust for it, same if you get a batch of e85 that is more like e50 on the flip side.

as far as loading time. i've never seen an ngauge take 30 minutes to load. thats more like sct time. the nguage file copies to the gauge in about 30 seocnds, and flash time is about 6 minutes. initial if it's downloading a stock tune may double that, but we have never flashed a car and had no where near that amount of time.

def more user friendly than the sct!

Stock file backup was what took a really long time. Perhaps the SD card has slow write times. I did it while on break at work so I was watching the clock and getting worried.

 

[DarkestHour]

In another thread on here someone mentioned Lund doesn't change the factory throttle mapping. I did find 4 throttle parameters that I have on the 6 signal display. One pair seems about equal and the other 3-4% higher. I'm not sure which those are but I'll check later today.

** edit **

Oops, already discussed here as well,

Then explain why I found it in my calibration from them and also they changed it back to the linear stock one when I requested My car kept going WOT at way too early a pedal position.

 

[DarkestHour]

Yeah, but it's not linear. I know this to be 100% true. It's pretty far from it. It may feel linear but it isn't. This info is straight from the supervisor in charge of 5.0L engine calibration. It's actually almost the same as the aggressive/sport Lincoln driver demand. Linear would be nice but it would get too many people who value tire roasting from tip-in over smooth control thinking it's not very powerful.

It is linear. I'm looking at the calibration right now. By modifying the "normal" outside of it's default linear such as how the sport/track works, the driver demand table will move up in to a higher torque demand at a lower physical pedal position.

 

[michail71]

Then explain why I found it in my calibration from them and also they changed it back to the linear stock one when I requested

LOL,that I can't, we seem to have some conflicting info. Perhaps they switched after your request?

I'm going to verify the pids you suggested to see what that may indicate.

 

[BmacIL]

It is linear. I'm looking at the calibration right now. By modifying the "normal" outside of it's default linear such as how the sport/track works, the driver demand table will move up in to a higher torque demand at a lower physical pedal position.

It is linear. I'm looking at the calibration right now. By modifying the "normal" outside of it's default linear such as how the sport/track works, the driver demand table will move up in to a higher torque demand at a lower physical pedal position.

That is slightly different from the actual driver demand tables. In effect, it'll do a similar thing but the demand tables will go off that pedal output % and command a set torque value for that. That's a signal modifier not an adjustment of the demand tables.

 

[DarkestHour]

That is slightly different from the actual driver demand tables. In effect, it'll do a similar thing but the demand tables will go off that pedal output % and command a set torque value for that. That's a signal modifier not an adjustment of the demand tables.

Yes, but it directly translates to the driver demand table. Having a non-linear pedal translation leads to sudden surges of power.

 

[BmacIL]

Yes, but it directly translates to the driver demand table. Having a non-linear pedal translation leads to sudden surges of power.

Agreed! Thus why those signal modifier devices that create a non linear pedal is so confusing to me.

 

[DarkestHour]

Agreed! Thus why those signal modifier devices that create a non linear pedal is so confusing to me.

Yeah, that is equally lost on me.

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