vF Tuning for Manual Transmission 3rd Gens

On the Primary Throttle map - has anyone tried to enter values more negative than -10.75 (or whatever the max stock value is) under the full lift column just for shits n giggles?

 

Ah. I get you.


Yes. Goofing up in this area of the maps is inconsequential and good for learning.

 

You're up!

-15 to know for sure.

 

Goes in tomorrow

EDIT: After a full day of fishing

 

Interesting

I was thinking of trying max negative values all the way down that column.

 

I was going to, however i reduced values in the 1st gear table as well.

 

Loving the testing everyone is doing here! I haven't had the time in the last 2 weeks to get back to this.

Just wondering if anybody else notices that at highway speeds that down shifting from lets say 6th to 5th will not yield any real acceleration ? Even dropping to 4th is just a dead fish for the most part. Seems to be speed related anything at higher crushing speeds seem to be more throttle limited.

Edit-
I'm thinking it has to do with this table but I'm not sure what the raw speed equates to in MPH....

 

Mine does fine in those gears. 6th and 5th are both overdrive so your not gonna see much difference.

I modified that air load table a bit and can put it in an excel file for you if you would like

 

@jstemp

 

as far as raw speed. I think the governor for the speed is 115. if you divide 14336 by 115 you get 124.66.

so if you divide all the raw values by 124.66 that may be the speeds the table references.

so something like this possibly



VF shows the top speed is 107 in MPH so i redid it with that as well

 

Ahhh, yes this would make perfect scene. Thanks!

 

Just remember that I'm assuming the top number is top speed.

I could be wrong

 

If I get a chance today I might make a big change to the acceleration air load table just to see how the 55 to 80mph acceleration is affected.

I don't expect lightning fast accel but from my unscientific eye I see the about the same MPH rise flooring it in 6th, down shifting to 5th and flooring it or even dropping to 4th. Which would make sense because at that speed it would be right in the hole of that table.

 

If i remember correctly Matt said increasing the values in this table will allow more throttle opening.

However your air intake is dictated by rpm.

At a given rpm and load and gear ratio, opening the throttle more may not actually provide more air, however it would eliminate any restriction if any does exist

 

Correct, but I just feel compelled to mess with it to see what breaks

 

Just in case, you guys know that we can change the speed limiter?

On my side of things, I definitely feel differences between all gears. But that is the nice part of vF. We get to personalize where needed because each Taco seems different.

 

I see where we can change the limiter, I've never been above 80 so i don't feel the need.

I think that was put in so people with 5.29s can actually go 80

 

I have been a bit above that, but don't really intend to test. I'm just not a fan of limits.

 

Just an update. Put about 400 miles of weekend driving on the below changes and my updated throttle map. I drove a mix of highway and windy mountain roads with a quick detour down a fire road to try 4hi. So far it has smoothed out even more. It is Extremely driveable and has more powerful/smooth acceleration through a variety of pedal inputs and rpm ranges. I tried 2wd, 4 hi, and reverse with no issues. Have yet to try 4lo to see if removing the torque limits leads any negative side effects. I will echo what others have already said in that the testing and sharing of data in this forum is awesome! Cheers!

 

Top = pedal

Bottom= actual

look at the end, i have 0 pedal but the throttle is doing whatever it wants

also, you can see the random blip even though i wasnt touching the pedal, it created another spike all on its own. this was in 1st gear, no throttle, down hill no brakes

you can also see how that blip caused the throttle to close more at first before opening, this is that dead pedal at tip in this map created

Here we go.

I ran my tested tune with values below the normal level, in both the 1st gear map and the primary throttle table.

This did not do anything for the throttle plate upon deceleration. but it sure did for acceleration. (the tables do have acceleration in their names dont they)

I created a horrible dead pedal at tip in with a jump into acceleration, present from a stop and upon each gear shift (initial pedal would not respond) I basically decreased throttle response.

while scrolling through shifts and off throttle while in gear i noticed two things.

Immediately after a shift the pedal shows 0, the command and actual throttle will show around 20 while in first, 19 in second, 18 in third and everything above that shows around 17.

it almost appears that rev hang and throttle returning to 14 (0) is speed dependent or gear dependent or a combination of such things.

on a side note, sometimes while at 0 pedal i get a random blip to around .3 even though im not touching the pedal (vibration, dips in road?)

during engine braking the throttle seems to be more open at higher speed than at lower speed.