Uprev

[DFW2011M56S]

So I finally have Uprev on the M56. All I have done so far is work on the fuel compensation table, tweak the enrichment table and worked on the torque map a bit. I basically took what I learned from the Titans I had and applied it to our mapping. Seems to be working well, the trans upshifts alot firmer than it did and seems to be more responsive overall after reducing the load scaler for 100% load so that the ECU sees a higher load percentage at lesser throttle. Timing table is stock and the timing is currently set to 0° in the ECU. I did keep the IAT resistor though. I also smoothed out the throttle map a bit in an attempt to cure the power fall off from the throttle plates closing at higher rpm. The transmission still refuses to upshift out of first gear prior to hitting the throttle limiter and I may push the limiter higher than the factory 6,500 rpm once I get the tune the way I like it. Runs pretty well and gives the traction control a nice workout. Traction control off resulted in a nice 2 gear burnout to about 60 mph. I need to get some wider rubber under the rear of it but that is a story for a different day.

http://www.youtube.com/watch?v=R6rtDYvngOs

[Ilya]

Nice!

[armybrat]

So I finally have Uprev on the M56. All I have done so far is work on the fuel compensation table, tweak the enrichment table and worked on the torque map a bit. I basically took what I learned from the Titans I had and applied it to our mapping. Seems to be working well, the trans upshifts alot firmer than it did and seems to be more responsive overall after reducing the load scaler for 100% load so that the ECU sees a higher load percentage at lesser throttle. Timing table is stock and the timing is currently set to 0° in the ECU. I did keep the IAT resistor though. I also smoothed out the throttle map a bit in an attempt to cure the power fall off from the throttle plates closing at higher rpm. The transmission still refuses to upshift out of first gear prior to hitting the throttle limiter and I may push the limiter higher than the factory 6,500 rpm once I get the tune the way I like it. Runs pretty well and gives the traction control a nice workout. Traction control off resulted in a nice 2 gear burnout to about 60 mph. I need to get some wider rubber under the rear of it but that is a story for a different day.

http://www.youtube.com/watch?v=R6rtDYvngOs

Cool I am planning on getting the Uprev myself soon. From your previous posts I was under the impression that you were not a big fan of Uprev. Have they made some improvements that swayed you back from when you had it the
first time?

[DFW2011M56S]

I am still not a big fan of Uprev but it is the only way we currently have to do any real tuning on this car. I am a bit of a tinkerer by nature and cannot seem to leave something that runs well as is alone. I always want more out of it. The car was running rich and the tweaks leaned it out. I noticed a long time ago you have to be careful with the timing advance or you will get knock activity and drop to the low octane spark map. I have an area that I had to pull 3 or 4 timing points out of when the car upshifts at WOT. It tended to get alot of knock activity on the 2-3 and 3-4 WOT upshifts where the engine settles back after the shift. Kept putting me into the low octane map. I think the advance curve could come in a little quicker at lower rpms but it would only really benefit 1st gear and adding more torque will only hurt my traction problem there. On my 2wd Titan I actually pulled some timing in the WOT 2,000-3,500 rpm range and got better times due to less wheelspin. You can have all the torque and hp in the world but it does no good if you cannot plant it.

[DFW2011M56S]

I finally got around to adding some different tires on the back but honestly it still spins them practically at will. 275/40R20s that are both wider and taller than the 245/40R20s I had before. Speedo is now roughly 10% slow. Shows about 72 mph when I am running 80 mph on GPS. Honestly my fuel mileage on the display is still hovering at 16.8 mpg around town despite the 10% error in distance traveled. Means I am getting better mileage overall which is almost unbelievable. Guess the old VK56 likes turning even less RPM than factory at cruising speeds. At 80 mph I am now turning about 1,800 rpm with the speedo showing 72 mph compared to 2,000 @ 80 mph before. I wish a tuning software for Nissan allowed for tire diameter changes and gear ratio corrections.

This is a new 0-90 in the coldest weather I have seen since I have had this car. DA is -1626 ft or 104.5% density. Would be setting some records if I could run down a track tonight. 5 gallons of C16 in the tank really woke it up last time I went to the track by killing the knock retard it saw on the stock timing map. I could probably put a little more timing to it on C16 and get even better times to be honest.

https://www.youtube.com/watch?v=f39KTgAZt4E

[armybrat]

I finally got around to adding some different tires on the back but honestly it still spins them practically at will. 275/40R20s that are both wider and taller than the 245/40R20s I had before. Speedo is now roughly 10% slow. Shows about 72 mph when I am running 80 mph on GPS. Honestly my fuel mileage on the display is still hovering at 16.8 mpg around town despite the 10% error in distance traveled. Means I am getting better mileage overall which is almost unbelievable. Guess the old VK56 likes turning even less RPM than factory at cruising speeds. At 80 mph I am now turning about 1,800 rpm with the speedo showing 72 mph compared to 2,000 @ 80 mph before. I wish a tuning software for Nissan allowed for tire diameter changes and gear ratio corrections.

This is a new 0-90 in the coldest weather I have seen since I have had this car. DA is -1626 ft or 104.5% density. Would be setting some records if I could run down a track tonight. 5 gallons of C16 in the tank really woke it up last time I went to the track by killing the knock retard it saw on the stock timing map. I could probably put a little more timing to it on C16 and get even better times to be honest.

https://www.youtube.com/watch?v=f39KTgAZt4E

Cool thanks for the video. I wonder if any real tuning can be done with the Consult III Plus, or is it more for diagnostic purposes? I know it would be a lot more money, but I've seen a few used ones online...might be worth it vs Uprev or Bullydog, etc.

[Debonair]

Cool thanks for the video. I wonder if any real tuning can be done with the Consult III Plus, or is it more for diagnostic purposes? I know it would be a lot more money, but I've seen a few used ones online...might be worth it vs Uprev or Bullydog, etc.

No tuning, only adjustments. Closest would prob be adjusting the timing but that's it. Everything else is resets and tests.

[DFW2011M56S]

So I got brave and bumped the rev limiter to 7,000 rpm and put the 2011 FX50 throttle mapping into my tune. All I can say is it has instant response from a stop, fights for traction all the way through 1st and 2nd and is much quicker now. Normal drive mode is like Sport mode before and Sport mode is INSANE.

[1GR8M56S]

nice

[Ilya]

So I got brave and bumped the rev limiter to 7,000 rpm and put the 2011 FX50 throttle mapping into my tune. All I can say is it has instant response from a stop, fights for traction all the way through 1st and 2nd and is much quicker now. Normal drive mode is like Sport mode before and Sport mode is INSANE.

More details as to what this might do long term (anything?).

[ArmedAviator]

Repeatedly taking an engine advice factory red line will cause excess wear. Over time you can kill the engine. Could still take a very long time still. The biggest danger going above red line is stressing the rotating mass beyond its limits and stretching the connecting rods to the point of fatigue. Then you'll have holes in your block and brown stains in your pants.


The other changes probably won't do much harm except add a little more sheer stress to driveline components when suddenly bringing on the torque. A common failure of any vehicle with increased output is undoubtedly failure so be sure to check them for play before you start romping on them. Transmission clutches will wear a bit faster but still probably last and lifetime.

Besides the rev limiter increase, everything DFW has done is probably all pretty mild and safe honestly.

[DFW2011M56S]

Repeatedly taking an engine advice factory red line will cause excess wear. Over time you can kill the engine. Could still take a very long time still. The biggest danger going above red line is stressing the rotating mass beyond its limits and stretching the connecting rods to the point of fatigue. Then you'll have holes in your block and brown stains in your pants.


The other changes probably won't do much harm except add a little more sheer stress to driveline components when suddenly bringing on the torque. A common failure of any vehicle with increased output is undoubtedly failure so be sure to check them for play before you start romping on them. Transmission clutches will wear a bit faster but still probably last and lifetime.

Besides the rev limiter increase, everything DFW has done is probably all pretty mild and safe honestly.

Revlimit is raised 150 rpm from the factory fuel shut-off. Nissan tunes pretty conservatively. There are guys with cammed Titans that have raised the limiter from 6,150 to 7,200 and flog them daily. If you have ever looked at our bottem end you would understand they are very similar to a LS Chevy and will take the the power and stress pretty well. The factory crank and rods are used in many race builds, turning 8,000+ rpm.

[1GR8M56S]

I would have to agree with DFW also at http://www.jimwolftechnology.com they put those vk56 to the test they pound on those engines or couse everything is probably tested and blueprinted but never the less its not like we're adding major HP just a tweek here and there

[Ilya]

I was more interested in the safety of the FX throttle mapping. So that's good? Can it be done without the redline bump?

[DFW2011M56S]

I was more interested in the safety of the FX throttle mapping. So that's good? Can it be done without the redline bump?

Yes it can be. I onlt gave the limit bumped in my performance map. Since I am messing with what works best I have several maps I have worked with. The stock fuel compensation map was running fairly lean at certain RPMs and loads.

[Ilya]

I'm wondering if I ask my tuner to use the A/F map he set up for me with the throttle map of the 2011 FX50 what the car will drive like...

[DFW2011M56S]

I'm wondering if I ask my tuner to use the A/F map he set up for me with the throttle map of the 2011 FX50 what the car will drive like...

Mine is much sportier now but as always with these cars results can vary.

[vr4z06gt]

I'm wondering if I ask my tuner to use the A/F map he set up for me with the throttle map of the 2011 FX50 what the car will drive like...

Mine is much sportier now but as always with these cars results can vary.

Any pre and post Tune numbers you can share? Dyno, 0-60, 1/4miles, MPG, etc?

[DFW2011M56S]

Mine is much sportier now but as always with these cars results can vary.

Any pre and post Tune numbers you can share? Dyno, 0-60, 1/4miles, MPG, etc?

No dyno or 0-60s yet. It has been so cold that traction is nearly non-existant on the street. Tracks are also all closed until next year. Tune is still a little rich and I need to mess with the fuel compensation map at WOT. Targeting 12.46 afr but I am running about 11-11.5 afr from 3,500-7,000 at the moment.

I am planning on pulling the intake this weekend and walnut blasting the intake valves and ports. Will check the air fuel ratio after that is done and post what I find on the intake ports and valves.

I am having so much fun with the power and response my fuel mileage has dropped about 1/2 mpg but I am also contending with heavier than normal traffic as well as standing on the accelerator every chance I get. I am still getting 16 mpg city though. Mileage should also slightly improve when I lean it out a little more at WOT.