Quadzilla Bucking

[Buggy78]

Hello newbie here, I’m having issues with a new Quadzilla Adrenaline v2 iquad it’s got a pretty bad (what I would call) buck at what seems to be around 18% throttle position. When accelerating it’ll hit 17-18% throttle and start jerking no matter what the speed is and seems to be worse on a grade, when easing out of the throttle I get the same results 18-17% throttle a hard starts jerking,I have tried everything I can think of to tune it out and no matter what I change it’s still there. Swapped apps sensor off of a friends truck with no luck same thing. I have put about 350 miles into just trying to tune this out. I’m about at my Witt’s end and considering just putting my edge comp back in but would really like to make this Quadzilla work out because of the extra features it has. Any help would be greatly appreciated.  

[Mopar1973Man]

Bucking is typically too much timing advancement. You might want to post your timing settings.

[Buggy78]

Power Levels:

 7

Timing

Fuel Load Timing: 2*

Low PSI Timing Reduct: 4*

Timing Reduct Scaling: 100%

Light Throttle Timing Adv: 3*

Light Throttle Timing Load Limit: 30%

 

Timing vs rpm

1500: 15

2000: 18

2500: 21

3000: 24

Timing Max: 27
 

Wiretap

Pump Stretch: 1600

TPS Pump max: 100%

TPS Pump Min 10%

Minimum Pump Tap Fueling Percentage: 0%

Pump Low Boost Scale PSI: 0psi

 

Boost Scaling: 30psi

 

RPM Limit: 3200

 

Power Reduction: 75%

 

0 PSI %:100

1 PSI %:101

2 PSI %:102

3 PSI %:103

4 PSI %:104

5 PSI %:105

6 PSI %:107

7 PSI %:109

8 PSI %:111

9 PSI %:113

10 PSI %:115

11 PSI %:117

12 PSI %:119

13 PSI %:121

14 PSI %:123

15 PSI %:126

16 PSI %:129

18 PSI %:132

20 PSI %:135

22 PSI %:140

24 PSI %:145

26 PSI %:150

28 PSI %:150

30 PSI %:150

 This is what I’m running as of now, I’ve also tried numerous changes and also tune downloads 

[Me78569]

datalog the bucking situtation,  that should clear up a lot of questions.

[Buggy78]

Sorry for the long span in between responses, I have one datalog saved but I’m not sure how to get it downloaded on here?

 

[903Dodge]

9 hours ago, Mopar1973Man said:

Bucking is typically too much timing advancement. You might want to post your timing settings.

Agreed. Had a similar problem started taking timing out and problem disappeared. 

 

1500: 13

2000: 15

2500: 18

 

I think is what I run.

 

I use the Light throttle to advance my timing where you have it set.  

[Me78569]

drag the datalog into the box below

[Buggy78]

I have a datalog attached if it is not what is needed ill get some more logged today and attach them tonight, Please forgive my ignorance with all of this just trying to learn as I go lol.

iQuad-2019-01-25-09.01.551890420092.csv

[Me78569]

where is the datalog is it bucking?  Line #'s would be great

 

Edit: the data log doesn't match the tune you posted.  the cut off for lgiht throttle timing is %20 in the datalog and %30 in what you posted.  

 

I also note you are using backdowns, which is fine, but I would disabled those for this testing.  

 

Are you using wiretap when it bucks?  does it do it on level 2? 3? 4+?  

[Buggy78]

Should be happening between the lines of 15-59 and 83-108

[Me78569]

what level is it bucking on?

[Buggy78]

It happens on 3+ levels, What do you mean by disable backdowns

I'm going into town I'll see if I can get more accurate information

Edited January 26, 2019 by Buggy78

[Me78569]

So no bucking on lvl2?  

 

Boost defuel and egt defuel.  Turn them off for testing.

 

If it does buck onlvl2 then try lvl 3 and repeat.

 

If it pannes on lvl3 it should happen on lvl 2 if it is timing related.  If it only happens on lvl3 + we should look at the fueling curve.

[Buggy78]

Power Levels:

 9

Timing

Fuel Load Timing: 2*

Low PSI Timing Reduct: 4*

Timing Reduct Scaling: 100%

Light Throttle Timing Adv: 3*

Light Throttle Timing Load Limit: 20%

 

Timing vs rpm

1500: 14

2000: 17

2500: 20

3000: 22

Timing Max: 25
 

Wiretap

Pump Stretch: 2000

TPS Pump max: 100%

TPS Pump Min 5%

Minimum Pump Tap Fueling Percentage: 20%

Pump Low Boost Scale PSI: 0psi

 

Boost Scaling: 30psi

 

RPM Limit: 3200

 

Power Reduction: 100%

 

0 PSI %:115

1 PSI %:116

2 PSI %:117

3 PSI %:118

4 PSI %:119

5 PSI %:120

6 PSI %:121

7 PSI %:122

8 PSI %:123

9 PSI %:124

10 PSI %:125

11 PSI %:126

12 PSI %:127

13 PSI %:128

14 PSI %:130

15 PSI %:132

16 PSI %:134

18 PSI %:139

20 PSI %:142

22 PSI %:145

24 PSI %:150

26 PSI %:150

28 PSI %:150

30 PSI %:150

 

It seems to just buck on levels 4 up more noticeable than levels 2-3, Here is a short datalog I have from this afternoon, With these settings I had some real hard jerks but I cant make anything out on the datalog should be in lines 123-294 range. I have one more short log I'll add as well. After going into town and back I hooked the edge comp back up and drove around for about 30 minutes on the same roads and conditions and had no issues with the edge on any level. I really hope that its just me not knowing what I'm doing and not the quadzilla.  

1log.csv

Power Levels:

 7

Timing

Fuel Load Timing: 2*

Low PSI Timing Reduct: 3*

Timing Reduct Scaling: 100%

Light Throttle Timing Adv: 2*

Light Throttle Timing Load Limit: 30%

 

Timing vs rpm

1500: 14

2000: 16

2500: 18

3000: 21

Timing Max: 26
 

Wiretap

Pump Stretch: 1800

TPS Pump max: 100%

TPS Pump Min 5%

Minimum Pump Tap Fueling Percentage: 10%

Pump Low Boost Scale PSI: 0psi

 

Boost Scaling: 30psi

 

RPM Limit: 3200

 

Power Reduction: 100%

 

0 PSI %:100

1 PSI %:101

2 PSI %:102

3 PSI %:103

4 PSI %:104

5 PSI %:105

6 PSI %:107

7 PSI %:109

8 PSI %:111

9 PSI %:113

10 PSI %:115

11 PSI %:117

12 PSI %:119

13 PSI %:121

14 PSI %:123

15 PSI %:126

16 PSI %:129

18 PSI %:132

20 PSI %:135

22 PSI %:140

24 PSI %:145

26 PSI %:150

28 PSI %:150

30 PSI %:150.

 

On this log and settings the bucking should be in lines 244-449 the best I can remember where it was happening.

2log.csv

Edited January 27, 2019 by Buggy78

[Me78569]

Any white smoke out the tailpipe?   

 

How bad is the bucking?   I am wondering if you aren't running enough timing down load when not in cruise state timing.  

 

Try this
 

Quote

Timing

Fuel Load Timing: 2*

Low PSI Timing Reduct: 3*

Timing Reduct Scaling: 100%

Light Throttle Timing Adv: 1.5*

Light Throttle Timing Load Limit: 30%

 

Timing vs rpm

1500: 16

2000: 18

2500: 25

3000: 28

Timing Max: 30

 

If that doesn't work give this a try this out.  It is a "hidden" mode of doing timing on the quad.  It will add to stock rather than running it's own.  

 

Quote

Timing

Fuel Load Timing: 0*

Low PSI Timing Reduct: 0*

Timing Reduct Scaling: 0%

Light Throttle Timing Adv: 0*

Light Throttle Timing Load Limit: 0%

 

Timing vs rpm

1500: 2

2000: 3

2500: 4

3000: 5

Timing Max: 6

 

Have you looked at the tune on the phone to verify that all the variables loaded?   You shouldn't see any 0's or 150's in the lower psi area of the fueling tune setup.

Edited January 27, 2019 by Me78569

[Buggy78]

No white smoke but a light grey smoke, On the low boost level fueling its 100 all the way across when building a new tune if that’s what you are asking about when looking at the phone. I’ll try those timing parameters out in a bit when I go back out, as far as the bucking it’s very noticeable to the point it’s unpleasant to drive. I really appreciate your replies in trying to help me figure this out.

Edited January 27, 2019 by Buggy78

[Mopar1973Man]

Smoke color and being light grey is possible that the timing is a bit retarded on the low end. 

 

You could try my current tune a bit aggressive...

 

1500 - 16.0

2000 - 19.7

2500 - 23.4

3000 - 27.1

Max - 27.1

 

Max timing offset - 1.5

Low PSI Timing Reduct - 4

Timing Reduct Scale - 50%

Light Throttle Timing Adv - 3

Light Throttle Load Limit - 30%

[Buggy78]

Timing

Fuel Load Timing: 2*

Low PSI Timing Reduct: 3*

Timing Reduct Scaling: 100%

Light Throttle Timing Adv: 1.5*

Light Throttle Timing Load Limit: 30%

 

Timing vs rpm

1500: 16

2000: 18

2500: 25

3000: 28

Timing Max: 30.                                                              So far this has been the smoothest it’s ran yet, light bucking on the same roads and clean conditions. I think this is headed in the rite direction any suggestions on witch way to move the timing from here.

[Mopar1973Man]

Timing is not even. 

 

Like mine above is +3.7 evenly spaced. 

 

16 + 3.7 = 19.7 + 3.7 = 23.4 + 3.7 = 27.1

 

RPM is linear and timing should follow the same linear scale. 

 

16 + 2 = 18 + 7 = 25 + 3 = 28 

 

Your timing is not linear. It all over the place. 

 

Here is a tool I made that helps...

performance tune.xlsx

 

Just change the blue blocks in my spreadsheet.

Edited January 27, 2019 by Mopar1973Man