were would you say this turbo spools?
07-08-07, 10:09 AM
#1
were would you say this turbo spools?
I have always wondered "when" everyone say's there turbo begin's to spool are they saying full boost or what? Here is a log from last night, 4th gear pull. Please let me know. Just running on wastgate.
Rpm Kph Boost
3273 93 -293
3289 93 -125
3299 93 -85
3309 93 -7
3333 93 3
3331 94 6
3358 94 8
3370 94 12
3381 94 14
3407 95 16
3432 95 17
3448 95 19
3457 96 22
3475 96 24
3489 97 26
3509 97 28
3526 97 30
3549 98 32
3569 99 35
3588 99 36
3610 99 38
3633 100 41
3669 101 43
3681 101 46
3698 102 48
3718 102 50
3753 103 53
3782 104 56
3814 104 59
3850 105 62
3883 106 66
3904 107 68
3937 108 71
3974 109 75
4010 109 78
4040 110 79
4071 111 80
4105 112 82
4139 113 85
4178 114 88
4218 115 92
4258 116 95
4300 117 97
4330 118 98
4363 119 98
4409 120 99
4445 121 99
4491 122 99
4542 123 99
4578 124 99
4612 125 99
4652 127 100
4693 128 100
4734 129 101
4770 130 102
4832 131 102
4870 132 103
4898 133 103
4934 134 104
4970 136 104
5016 136 105
5043 138 106
5088 139 105
5112 140 107
5161 141 106
5186 142 108
5233 143 108
5266 144 109
5307 145 109
5338 146 110
5384 147 111
5426 148 111
5478 149 112
5514 151 113
5535 152 113
5597 153 113
5630 154 114
5660 155 114
5703 156 114
5769 157 114
5804 159 115
5841 160 115
5873 161 116
5914 162 117
5952 163 117
6000 165 118
6053 166 118
6087 167 118
6132 168 118
6177 170 118
6218 171 119
6260 171 119
6302 172 120
6345 173 120
6393 174 120
Rpm Kph Boost
3273 93 -293
3289 93 -125
3299 93 -85
3309 93 -7
3333 93 3
3331 94 6
3358 94 8
3370 94 12
3381 94 14
3407 95 16
3432 95 17
3448 95 19
3457 96 22
3475 96 24
3489 97 26
3509 97 28
3526 97 30
3549 98 32
3569 99 35
3588 99 36
3610 99 38
3633 100 41
3669 101 43
3681 101 46
3698 102 48
3718 102 50
3753 103 53
3782 104 56
3814 104 59
3850 105 62
3883 106 66
3904 107 68
3937 108 71
3974 109 75
4010 109 78
4040 110 79
4071 111 80
4105 112 82
4139 113 85
4178 114 88
4218 115 92
4258 116 95
4300 117 97
4330 118 98
4363 119 98
4409 120 99
4445 121 99
4491 122 99
4542 123 99
4578 124 99
4612 125 99
4652 127 100
4693 128 100
4734 129 101
4770 130 102
4832 131 102
4870 132 103
4898 133 103
4934 134 104
4970 136 104
5016 136 105
5043 138 106
5088 139 105
5112 140 107
5161 141 106
5186 142 108
5233 143 108
5266 144 109
5307 145 109
5338 146 110
5384 147 111
5426 148 111
5478 149 112
5514 151 113
5535 152 113
5597 153 113
5630 154 114
5660 155 114
5703 156 114
5769 157 114
5804 159 115
5841 160 115
5873 161 116
5914 162 117
5952 163 117
6000 165 118
6053 166 118
6087 167 118
6132 168 118
6177 170 118
6218 171 119
6260 171 119
6302 172 120
6345 173 120
6393 174 120
07-08-07, 10:54 AM
#2
LOL - boost is starting when you hit positive pressure at 3333 RPM.... however that is obviously way under the efficiency range...
If you have a full scale from the time you floored it in 3rd or 4th gear at 2500rpm to the time it hits your desired boot level that would be better.
I mean if you are sitting at 3300 rpms and floor it, chances are the turbo is going to spool right up, but that is not an accurate way to tell when/where the turbo spools.. .you need to do a full pull from lower RPM.
Try this if you want to graph it....
Get into 4th gear around 2500 RPM.....FLOOR IT, take it up to around 7k RPM and then show us that data.
If you have a full scale from the time you floored it in 3rd or 4th gear at 2500rpm to the time it hits your desired boot level that would be better.
I mean if you are sitting at 3300 rpms and floor it, chances are the turbo is going to spool right up, but that is not an accurate way to tell when/where the turbo spools.. .you need to do a full pull from lower RPM.
Try this if you want to graph it....
Get into 4th gear around 2500 RPM.....FLOOR IT, take it up to around 7k RPM and then show us that data.
07-08-07, 01:00 PM
#3
LOL! I know what boost is! What I am asking is to figure if turbo A is a slow spooling or fast spooling unit. If I had some of my old logs from my 40r it would help. This is on a 4094 with .95 exhhaust. Here is a 3rd gear pull from lower rpms.
RPM KPH BOOST
2439 32 -20
2483 33 -10
2541 33 -3
2601 34 0
2657 35 0
2729 35 1
2791 37 2
2854 37 1
2903 38 2
2979 39 2
3067 40 3
3138 41 4
3225 42 5
3299 43 6
3378 44 7
3478 45 8
3541 46 10
3646 47 12
3712 48 14
3809 49 17
3902 50 20
4004 51 24
4111 53 29
4218 54 33
4332 56 39
4440 57 44
4562 59 51
4678 60 58
4841 62 68
4990 64 80
5133 66 90
5326 68 100
5470 70 105
5690 72 107
5813 74 109
6067 77 110
6193 79 113
6410 82 113
6533 84 116
6830 86 118
6963 88 119
7149 90 119
7345 92 118
RPM KPH BOOST
2439 32 -20
2483 33 -10
2541 33 -3
2601 34 0
2657 35 0
2729 35 1
2791 37 2
2854 37 1
2903 38 2
2979 39 2
3067 40 3
3138 41 4
3225 42 5
3299 43 6
3378 44 7
3478 45 8
3541 46 10
3646 47 12
3712 48 14
3809 49 17
3902 50 20
4004 51 24
4111 53 29
4218 54 33
4332 56 39
4440 57 44
4562 59 51
4678 60 58
4841 62 68
4990 64 80
5133 66 90
5326 68 100
5470 70 105
5690 72 107
5813 74 109
6067 77 110
6193 79 113
6410 82 113
6533 84 116
6830 86 118
6963 88 119
7149 90 119
7345 92 118
07-08-07, 09:08 PM
#6
PM me and we can compare notes. It's best to leave the nitwits out of it when they have nothing to add to contribute.
From your numbers for the 4th gear pull it looks like you hit 4330 for the target (wastegate spring) boost. What worries me is that you kept boost over the spring pressure. Steady climb. You might have an issue with that. The turbo is over powering the WG. It could be a combination of WG issue or the path to the WG that the piping takes. Whose manifold is it?
Do this scenario and I'll provide a direct comparison:
3rd gear pull from 2500rpm until say, 6000rpm.
Freeway entrance ramps works nice for this.
From your numbers for the 4th gear pull it looks like you hit 4330 for the target (wastegate spring) boost. What worries me is that you kept boost over the spring pressure. Steady climb. You might have an issue with that. The turbo is over powering the WG. It could be a combination of WG issue or the path to the WG that the piping takes. Whose manifold is it?
Do this scenario and I'll provide a direct comparison:
3rd gear pull from 2500rpm until say, 6000rpm.
Freeway entrance ramps works nice for this.
Last edited by Asleep; 07-08-07 at 09:32 PM.
07-08-07, 09:48 PM
#7
Recent dyno session shows I hit target boost of 23 psi at 4800 rpm in 4th gear.
Road tuning shows I hit 1 bar at 4300rpm in 3rd gear....starting from 2500rpm runnning WOT. I hit 19psi that run by 4600rpm.
Road tuning shows I hit 1 bar at 4300rpm in 3rd gear....starting from 2500rpm runnning WOT. I hit 19psi that run by 4600rpm.
Trending Topics
07-08-07, 10:42 PM
#8
PM me and we can compare notes. It's best to leave the nitwits out of it when they have nothing to add to contribute.
From your numbers for the 4th gear pull it looks like you hit 4330 for the target (wastegate spring) boost. What worries me is that you kept boost over the spring pressure. Steady climb. You might have an issue with that. The turbo is over powering the WG. It could be a combination of WG issue or the path to the WG that the piping takes. Whose manifold is it?
Do this scenario and I'll provide a direct comparison:
3rd gear pull from 2500rpm until say, 6000rpm.
Freeway entrance ramps works nice for this.
From your numbers for the 4th gear pull it looks like you hit 4330 for the target (wastegate spring) boost. What worries me is that you kept boost over the spring pressure. Steady climb. You might have an issue with that. The turbo is over powering the WG. It could be a combination of WG issue or the path to the WG that the piping takes. Whose manifold is it?
Do this scenario and I'll provide a direct comparison:
3rd gear pull from 2500rpm until say, 6000rpm.
Freeway entrance ramps works nice for this.
The mani is A-spec long runner. I have been talking with Sean as the spring should have been a .9 bar but I keep seeing 1.2 on every run. Sometimes a hair high or low. (1.18-1.22). Now the wastegate is routed back in... I will PM you a few more logs from tonight.
07-08-07, 10:48 PM
#9
Okay. I posted a chart of mine in another thread.
Something is wrong. When running with boost controller off (WG only) you should not be creeping unless you have an issue with the WG or the setup. Even if the output of the WG is routed in or out, it should not creep that much. If the spring is actually .9 and you are getting around 1.2, then that supports the assumption of an issue.
Sean's a good guy. He'll take care of you.
07-08-07, 11:07 PM
#10
Original Gangster/Rotary!
iTrader: (213)
I can tell ya that on a 4th gear redline pull I saw boost creep up to about 19 psi (12 psi spring) with my 500R/long runner mani/4in dp/tial 44mm gate. Only time I've seen creep with this setup. I also see 1 bar around 3700 rpms, give or take a bit based on ambient temps (2nd/3rd gear).
07-08-07, 11:33 PM
#12
Nah, have a good night. I will go over the gate again but I have run a few test per Sean and have gotten 1.2 bars every time. My other thought is the 3bar sensor. Maybe I have it set up wrong on the PFC? I have noticed my boost guage is lower than the reading on datalogic but between watching a/r's, rpm, speed, road, boost its hard. But tonight on the last pull I watched the guage in 2nd gear and it looked to be 15-16psi yet my log showed 17.5psi. Either way its higher than the .9 bar spring.
Rich, that 500r does spool very fast and I am sure the 4inch exhaust helps too.
Rich, that 500r does spool very fast and I am sure the 4inch exhaust helps too.
07-10-07, 10:17 AM
#16
BDC Motorsports
LOL! I know what boost is! What I am asking is to figure if turbo A is a slow spooling or fast spooling unit. If I had some of my old logs from my 40r it would help. This is on a 4094 with .95 exhhaust. Here is a 3rd gear pull from lower rpms.
RPM KPH BOOST
2439 32 -20
2483 33 -10
2541 33 -3
2601 34 0
2657 35 0
2729 35 1
2791 37 2
2854 37 1
2903 38 2
2979 39 2
3067 40 3
3138 41 4
3225 42 5
3299 43 6
3378 44 7
3478 45 8
3541 46 10
3646 47 12
3712 48 14
3809 49 17
3902 50 20
4004 51 24
4111 53 29
4218 54 33
4332 56 39
4440 57 44
4562 59 51
4678 60 58
4841 62 68
4990 64 80
5133 66 90
5326 68 100
5470 70 105
5690 72 107
5813 74 109
6067 77 110
6193 79 113
6410 82 113
6533 84 116
6830 86 118
6963 88 119
7149 90 119
7345 92 118
RPM KPH BOOST
2439 32 -20
2483 33 -10
2541 33 -3
2601 34 0
2657 35 0
2729 35 1
2791 37 2
2854 37 1
2903 38 2
2979 39 2
3067 40 3
3138 41 4
3225 42 5
3299 43 6
3378 44 7
3478 45 8
3541 46 10
3646 47 12
3712 48 14
3809 49 17
3902 50 20
4004 51 24
4111 53 29
4218 54 33
4332 56 39
4440 57 44
4562 59 51
4678 60 58
4841 62 68
4990 64 80
5133 66 90
5326 68 100
5470 70 105
5690 72 107
5813 74 109
6067 77 110
6193 79 113
6410 82 113
6533 84 116
6830 86 118
6963 88 119
7149 90 119
7345 92 118
B
07-10-07, 12:36 PM
#21
Down for the count...
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http://www.tialsport.com/prod_wg.htm
Yes, in the Tial 44mm WG, the large blue spring is the 0.900 bar spring, which is equal to 13.053 psi.
Yes, in the Tial 44mm WG, the large blue spring is the 0.900 bar spring, which is equal to 13.053 psi.
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