Question about car vibrations

[bentaw]

Right tonight i decided to do some more logging to see that the settings i left it on are still running fine which were boost 5 timing 6 and this was the first log after i really gunned it,

Group A: '115
RPM Load Absolute Pres. Absolute Pres.
TIME
STAMP /min % mbar mbar
247.31 2280 15.8 1010 1030
248.53 2200 22.6 1010 1020
249.74 2160 46.6 1010 1020
250.83 2160 48.1 1010 1100
251.94 2200 62.4 1010 1070
253.06 2280 93.2 1440 1200
254.06 2400 112.8 1430 1500
254.97 2520 110.5 1580 1500
255.87 2760 191.7 2070 2130
256.98 3200 182 2110 2540
258.19 3600 174.4 2150 2430
259.19 3920 175.9 2160 2360
260.3 4240 191.7 2130 2270
261.41 4560 175.9 2080 2160
262.31 4760 170.7 2030 2090
263.22 4960 172.2 1980 2010
264.22 5160 166.9 1940 1980
265.33 5400 164.7 1910 2010
266.44 5600 160.2 1870 2030
267.64 5800 158.6 1830 2020
268.66 5960 155.6 1810 2030
269.66 6120 154.9 1790 1980
270.77 6280 150.4 1760 2000
271.78 6440 146.6 1740 2000
272.88 6160 13.5 1010 1520
273.98 5040 13.5 1010 1620
275.18 4080 12.8 1010 1090
276.29 3920 12.8 1010 1060
277.4 3720 12.8 1010 1050
278.5 3560 12.8 1010 1050
279.5 3440 12.8 1010 1050
280.5 3360 13.5 1010 1040
281.42 3280 13.5 1010 1040
282.42 3200 13.5 1010 1040

 

[bentaw]

This is the timing pull back at those RPMS

'020
Idle Stabilization Idle Stabilization Idle Stabilization Idle Stabilization

CF CF CF CF
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0

 

[bentaw]

Really good however when you look at the timing pull back lower down the rev range roughly around 1500 to 2300 rpm there is a fair bit now is the fact that i have a forge dog bone bush making my car vibrate that bit more causing the timing pull back as that is what the knock sensors pick up isnt it vibrations,

'020 Group C: '011
Idle Stabilization Idle Stabilization Idle Stabilization Idle Stabilization RPM
TIME
CF CF CF CF STAMP /min
0 0 0 0 0.3 1480
0 0 0 0 1.39 1680
0 0 0 0 2.5 2520
0 0 0 0 3.61 1960
0 0 0 0 4.72 1880
0 0 0 0 5.82 1640
0 0 0 0 7.03 1120
0 0 0 0 8.13 800
0 0 0 0 9.14 720
0 0 0 0 10.24 720
0 0 0 0 11.35 760
0 0 0 0 12.46 1280
0 0 0 0 13.47 1200
0 0 0 0 14.57 1360
0 0 0 0 15.58 1680
0 0 0 0 16.68 1240
0 0 0 0 17.8 880
0 0 0 0 18.89 720
0 0 0 0 20.01 720
0 0 0 0 21.01 760
0 0 0 0 21.92 1200
0 0 0 0 22.82 1120
0 0 0 0 23.83 1040
0 0 0 0 24.93 960
0 0 0 0 26.13 960
0 0 0 0 27.24 840
0 0 0 3.8 28.36 1120
0 0 0 3.8 29.46 2000
0 0 0 0 30.46 1840
0 0 0 1.5 31.37 1680
0 0 0 1.5 32.28 2240
0 0 0 0.8 33.17 2480

 

[bentaw]

With the dog bone bush pulling away is where you really feel the vibrations so could that be causing that

 

[Ruddmeister]

With the dog bone bush pulling away is where you really feel the vibrations so could that be causing that

You sure I got zero vibration except a tiny bit at idle, this would have been cured by upping the idle a few hundred rpm me thinks.

Was the dog bone torqued correctly, very important it's not too tight.

 

[bentaw]

i had it done at JKM so i guess they would have done it correctly but it seems funny that the knocks only happen between 1500 and 2300 rpm in either the 2nd or 4th CF columns

 

[CupraSteve]

dont forget when your at standstill or very low speed there is little airflow going through the intercooler, or the induction system for that matter

 

[bentaw]

yeah so heat soak is another reason why those readings are higher there, but if say i was to leave my car on timing 8 would it do any long term damage, obviously everyday driving there is no point it being on 8 as quite a lot of we are sat in traffic but say night time and special occasions putting the car on 8 or 9 would be ok even if i am seeing that pull back low down the rev range