is this a boost leak or do i need a new tune?
is this a boost leak or do i need a new tune?
first some info.
ok i moved from watertown ny (elevation aporx 500ft) to rapid city SD (elevation aporx 3300) my car was shipped since getting here the car seem to be actting wierd some days other days its fine.
i never really got on the car since getting here. once i got the car i installed my ams intercooler and ams licp and my buscur Uicp.
since installation of these i hit 23psi (depending on the heat i may hit 24-25psi then i have adjust my MBC) but it drops dramastically towards redline. getting down in 16psi range. before installiong of these and before the car was moved out here i would hold 23-22 all the way to redline. and some days i cant hit full boost in 1st gear.
would this be caused becasue of a boost leak? or is the elevation that drastically changed where i need to get retuned? im running 94 octane.
ok i moved from watertown ny (elevation aporx 500ft) to rapid city SD (elevation aporx 3300) my car was shipped since getting here the car seem to be actting wierd some days other days its fine.
i never really got on the car since getting here. once i got the car i installed my ams intercooler and ams licp and my buscur Uicp.
since installation of these i hit 23psi (depending on the heat i may hit 24-25psi then i have adjust my MBC) but it drops dramastically towards redline. getting down in 16psi range. before installiong of these and before the car was moved out here i would hold 23-22 all the way to redline. and some days i cant hit full boost in 1st gear.
would this be caused becasue of a boost leak? or is the elevation that drastically changed where i need to get retuned? im running 94 octane.
Altitude reduces the efficiency of the turbo, thus causing more severe boost taper. You also NEVER held 22-23psi to redline. YOu may have held it to 5000rpm, but it certainly tapered 2-3 psi by redline. You never can hit full boost in 1st gear, because there isn't enough load.
Yes, you also need a retune for altitude.
Yes, you also need a retune for altitude.
Altitude reduces the efficiency of the turbo, thus causing more severe boost taper. You also NEVER held 22-23psi to redline. YOu may have held it to 5000rpm, but it certainly tapered 2-3 psi by redline. You never can hit full boost in 1st gear, because there isn't enough load.
Yes, you also need a retune for altitude.
Yes, you also need a retune for altitude.
since im north of you any good tuners in this area? so should i cross out the boost leak problem?
Actually, yes, you are relatively close. Join up at RMEVO.com, and we can help you out. Our local tuner is in Cheyenne, which is even closer to you than most of us, so that should work out nicely. Is it really only 3300' up there? It's over 6000' down here...
yip i have to agree with War!!
Altitude is a killer and makes our turbos work harder.
people always say they make X amount of boost at 7k rpm!
but until it is logged i am no believer.
i am at 5300ft and i taper to 1.15 bar at 7k rpm with and EVC 6 mapped correctly.
I am gonna try an Actuator soon to see if i can hold more boost towards redline.
Altitude is a killer and makes our turbos work harder.
people always say they make X amount of boost at 7k rpm!
but until it is logged i am no believer.
i am at 5300ft and i taper to 1.15 bar at 7k rpm with and EVC 6 mapped correctly.
I am gonna try an Actuator soon to see if i can hold more boost towards redline.
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yip i have to agree with War!!
Altitude is a killer and makes our turbos work harder.
people always say they make X amount of boost at 7k rpm!
but until it is logged i am no believer.
i am at 5300ft and i taper to 1.15 bar at 7k rpm with and EVC 6 mapped correctly.
I am gonna try an Actuator soon to see if i can hold more boost towards redline.
Altitude is a killer and makes our turbos work harder.
people always say they make X amount of boost at 7k rpm!
but until it is logged i am no believer.
i am at 5300ft and i taper to 1.15 bar at 7k rpm with and EVC 6 mapped correctly.
I am gonna try an Actuator soon to see if i can hold more boost towards redline.
this is the first time the car has seen anything higher then 800ft in elevation. so going from 500ft or so to 3300 i was wondering how much of a difference that had on the car and i didnt know if a boost leak could cause what im having since i changed parts before i really even drove the car around here.
Evolved Member
Joined: Sep 2003
Posts: 1,078
Likes: 61
From: Ulster County, NY
yip i have to agree with War!!
Altitude is a killer and makes our turbos work harder.
people always say they make X amount of boost at 7k rpm!
but until it is logged i am no believer.
i am at 5300ft and i taper to 1.15 bar at 7k rpm with and EVC 6 mapped correctly.
I am gonna try an Actuator soon to see if i can hold more boost towards redline.
Altitude is a killer and makes our turbos work harder.
people always say they make X amount of boost at 7k rpm!
but until it is logged i am no believer.
i am at 5300ft and i taper to 1.15 bar at 7k rpm with and EVC 6 mapped correctly.
I am gonna try an Actuator soon to see if i can hold more boost towards redline.
Sorry to go OT a bit, but here's a log of one of my runs last week. Logged with my UTEC. Ran 4th out to redline.
I don't have a problem holding good boost up top. There's still some taper.
I still have 2 boost leaks to fix - TB seals and a small leak on the LICP.
Code:
EXT Load Knock Mod Mod Mod
RPM MAP MAF TPS Site Count Ign#1 Inj#1 Ign Fuel Boost MAF
psia Hz % deg duty deg % (OL) Hz
899 -6.4 32 0 00 00 +11.4 1.6 ECU. +0.0 ECU. 32
891 -6.6 32 0 00 00 +17.8 1.7 ECU. +0.0 ECU. 33
868 -6.9 32 0 00 00 +16.7 1.5 ECU. +0.0 ECU. 32
853 -6.9 32 0 00 00 +12.5 1.7 ECU. +0.0 ECU. 32
958 -6.4 125 18 00 00 +15.2 7.5 ECU. +0.0 ECU. 145
1740 -4.7 168 93 10 00 +20.3 5.4 ECU. +0.0 75.00 166
2858 -3.1 303 100 10 00 +21.8 10.8 ECU. +0.0 75.00 430
4100 -1.4 502 100 10 00 +24.1 20.0 ECU. +0.0 75.00 555
5411 +0.0 786 100 10 00 +22.8 25.8 ECU. +0.0 75.00 919
6027 +0.9 924 100 10 00 +21.3 28.8 ECU. +0.0 LCM. 939
5952 +2.1 912 100 20 00 +22.0 27.2 ECU. +0.0 LCM. 1004
6060 +3.3 932 100 20 00 +22.2 28.7 ECU. +0.0 LCM. 1004
5941 +4.5 899 79 20 00 +22.4 28.2 ECU. +0.0 75.00 841
6027 +4.2 507 30 00 00 +30.0 19.1 ECU. +0.0 LCM. 474
6116 +3.0 897 51 10 00 +27.5 29.2 ECU. +0.0 LCM. 871
5973 +2.3 542 32 00 00 +30.3 18.6 ECU. +0.0 LCM. 412
5827 -0.5 169 12 00 00 +38.4 17.6 ECU. +0.0 ECU. 204
5464 -3.6 92 12 00 00 +38.2 7.3 ECU. +0.0 ECU. 60
5020 -6.4 90 11 00 00 +38.1 71.7 ECU. +0.0 ECU. 190
5257 -9.2 473 29 00 00 +32.1 18.3 ECU. +0.0 ECU. 572
6038 -8.5 616 33 00 00 +31.3 27.9 ECU. +0.0 LCM. 446
5640 -7.6 143 16 00 00 +38.4 7.2 ECU. +0.0 ECU. 170
5837 -6.4 713 39 10 00 +29.1 25.5 ECU. +0.0 ECU. 733
5878 -5.2 241 20 00 00 +36.3 9.8 ECU. +0.0 ECU. 213
5473 -6.6 252 21 00 00 +37.1 10.1 ECU. +0.0 ECU. 251
5402 -7.1 142 16 00 00 +38.4 8.9 ECU. +0.0 ECU. 176
5537 -7.3 635 37 10 00 +30.3 23.8 ECU. +0.0 ECU. 694
5889 -7.3 250 20 00 00 +35.2 11.0 ECU. +0.0 ECU. 219
5611 -7.6 228 20 00 00 +38.3 58.5 ECU. +0.0 ECU. 333
6071 -6.4 645 39 10 00 +29.1 18.6 ECU. +0.0 LCM. 528
5668 -5.9 173 18 00 00 +38.3 10.8 ECU. +0.0 ECU. 205
5668 -7.1 412 26 00 00 +33.3 ---.- ECU. +0.0 ECU. 542
5952 -5.7 351 25 00 00 +31.4 10.6 ECU. +0.0 ECU. 212
5455 -6.9 131 15 00 00 +38.3 8.3 ECU. +0.0 ECU. 144
5583 -7.3 597 34 00 00 +30.0 24.3 ECU. +0.0 ECU. 609
5931 -6.2 167 15 00 00 +37.3 8.6 ECU. +0.0 ECU. 82
5564 -7.8 260 22 00 00 +38.3 9.7 ECU. +0.0 ECU. 367
5491 -7.8 502 27 00 00 +33.3 31.1 ECU. +0.0 ECU. 651
Start run
1st
EXT Load Knock Mod Mod Mod
RPM MAP MAF TPS Site Count Ign#1 Inj#1 Ign Fuel Boost MAF
psia Hz % deg duty deg % (OL) Hz
5659 -6.2 891 58 10 00 +25.4 24.0 ECU. +0.0 75.00 957
5518 -3.8 1225 100 10 00 +14.5 40.2 ECU. +0.0 75.00 1396
4975 +1.6 1533 100 30 00 +9.0 49.6 ECU. +0.0 75.00 1428
4268 +8.7 1336 100 50 00 +8.1 48.9 ECU. +0.0 75.00 1488
4426 +14.8 1340 100 70 00 +8.0 48.5 ECU. +0.0 75.00 1533
4694 +20.0 1543 100 80 00 +8.1 53.7 ECU. +0.0 75.00 1453
4866 +23.6 1582 100 80 00 +8.9 23.5 ECU. +0.0 75.00 1533
5167 +25.0 1597 100 80 00 +8.1 55.2 ECU. +0.0 75.00 1798
5952 +25.5 1923 100 80 00 +11.0 63.8 ECU. +0.0 75.00 1838
6613 +25.2 1984 100 80 00 +13.7 64.5 ECU. +0.0 75.00 2049
7199 +24.8 2083 100 80 00 +15.8 66.4 ECU. +0.0 LCM. 1968
2nd
EXT Load Knock Mod Mod Mod
RPM MAP MAF TPS Site Count Ign#1 Inj#1 Ign Fuel Boost MAF
psia Hz % deg duty deg % (OL) Hz
6172 +23.1 1050 100 70 00 +23.3 31.5 ECU. +0.0 LCM. 1126
5192 +19.8 1070 100 50 00 +17.2 33.9 ECU. +0.0 75.00 1219
5574 +17.2 1694 100 40 00 +10.1 54.4 ECU. +0.0 75.00 1824
5698 +16.7 1886 100 60 00 +9.1 68.4 ECU. +0.0 75.00 2032
5878 +18.1 1872 100 80 00 +10.2 66.6 ECU. +0.0 75.00 1736
6138 +21.5 1953 100 80 00 +11.2 65.5 ECU. +0.0 75.00 1908
6459 +24.3 2000 100 80 00 +12.3 68.3 ECU. +0.0 75.00 2016
6816 +24.8 2032 100 80 00 +13.9 69.4 ECU. +0.0 75.00 1984
7092 +24.3 2057 100 80 00 +15.5 65.9 ECU. +0.0 75.00 1953
6587 +24.0 1291 100 80 00 +15.8 54.1 ECU. +0.0 LCM. 1046
3rd
EXT Load Knock Mod Mod Mod
RPM MAP MAF TPS Site Count Ign#1 Inj#1 Ign Fuel Boost MAF
psia Hz % deg duty deg % (OL) Hz
6071 +21.7 1123 100 60 00 +22.1 35.0 ECU. +0.0 LCM. 1308
5668 +19.1 1672 100 50 00 +11.1 56.2 ECU. +0.0 75.00 1811
5640 +18.6 1908 100 60 00 +9.3 65.8 ECU. +0.0 75.00 1811
5717 +19.1 1824 100 80 00 +10.2 63.6 ECU. +0.0 75.00 1865
5868 +21.5 1886 100 80 00 +10.3 63.5 ECU. +0.0 75.00 1736
6060 +24.5 1937 100 80 00 +11.3 69.2 ECU. +0.0 75.00 1923
6242 +25.5 1960 100 80 00 +11.2 67.1 ECU. +0.0 75.00 1984
6385 +25.2 1992 100 80 00 +12.5 69.9 ECU. +0.0 75.00 2016
6548 +25.0 2000 100 80 00 +12.5 68.4 ECU. +0.0 75.00 2000
6706 +24.8 2008 100 80 00 +13.6 71.6 ECU. +0.0 75.00 2136
6844 +24.5 2024 100 80 00 +14.7 68.8 ECU. +0.0 75.00 2100
7002 +24.5 2066 100 80 00 +15.8 68.5 ECU. +0.0 75.00 2118
7168 +24.3 2066 100 80 00 +16.0 71.9 ECU. +0.0 75.00 2083
7309 +24.0 2074 100 80 00 +16.5 71.3 ECU. +0.0 75.00 2118
7440 +23.8 2083 100 80 00 +16.7 68.0 ECU. +0.0 75.00 2100
6706 +23.1 1207 100 70 00 +23.6 43.7 ECU. +0.0 LCM. 1068
4th
EXT Load Knock Mod Mod Mod
RPM MAP MAF TPS Site Count Ign#1 Inj#1 Ign Fuel Boost MAF
psia Hz % deg duty deg % (OL) Hz
5359 +20.5 1004 100 60 00 +19.9 31.9 ECU. +0.0 75.00 1262
5437 +18.4 1730 100 50 00 +8.7 60.0 ECU. +0.0 75.00 1838
5659 +18.4 1901 100 60 00 +9.1 65.7 ECU. +0.0 75.00 1712
5659 +19.3 1798 100 80 00 +10.1 62.3 ECU. +0.0 75.00 1851
5787 +22.6 1872 100 80 00 +10.3 63.9 ECU. +0.0 75.00 1798
5878 +25.2 1838 100 80 00 +10.2 66.2 ECU. +0.0 75.00 1937
5952 +25.7 1865 100 80 00 +11.5 64.1 ECU. +0.0 75.00 1811
6027 +25.7 1865 100 80 00 +11.1 67.2 ECU. +0.0 75.00 1798
6138 +25.2 1930 100 80 00 +11.4 69.0 ECU. +0.0 75.00 2100
6207 +25.2 1953 100 80 00 +11.2 68.4 ECU. +0.0 75.00 1937
6277 +25.2 1945 100 80 00 +11.7 70.3 ECU. +0.0 75.00 1984
6373 +25.2 1968 100 80 00 +12.1 68.3 ECU. +0.0 75.00 1968
6447 +25.2 1960 100 80 00 +12.1 67.8 ECU. +0.0 75.00 1851
6497 +25.2 2000 100 80 00 +12.1 69.7 ECU. +0.0 75.00 2066
6613 +25.2 2024 100 80 00 +13.1 69.8 ECU. +0.0 75.00 1937
6680 +25.0 2000 100 80 00 +13.7 72.9 ECU. +0.0 75.00 1953
6734 +24.8 2008 100 80 00 +13.6 70.3 ECU. +0.0 75.00 2100
6816 +24.8 2040 100 80 00 +14.7 71.6 ECU. +0.0 75.00 1953
6887 +24.5 2040 100 80 00 +14.7 68.5 ECU. +0.0 75.00 2000
6958 +24.5 2057 100 80 00 +16.2 69.6 ECU. +0.0 75.00 1953
7032 +24.3 2057 100 80 00 +16.6 66.8 ECU. +0.0 75.00 2032
7092 +24.3 2049 100 80 00 +16.5 70.0 ECU. +0.0 75.00 2232
7153 +24.0 2066 100 80 00 +16.6 71.7 ECU. +0.0 75.00 2066
7215 +23.8 2083 100 80 00 +16.5 68.6 ECU. +0.0 75.00 2066
7278 +23.8 2083 100 80 00 +17.5 69.0 ECU. +0.0 75.00 2049
7342 +23.8 2083 100 80 00 +17.4 71.0 ECU. +0.0 75.00 2192
7440 +23.8 2118 100 80 00 +17.7 69.9 ECU. +0.0 75.00 2083
7457 +23.6 2092 100 80 00 +17.6 72.0 ECU. +0.0 75.00 2016
7507 +23.6 2109 100 80 00 +17.7 67.9 ECU. +0.0 75.00 2136
7575 +23.6 2092 100 80 00 +17.7 68.9 ECU. +0.0 75.00 2100
7680 +23.6 2118 100 80 00 +17.8 70.3 ECU. +0.0 75.00 2232
7698 +23.6 2092 100 80 00 +17.7 73.1 ECU. +0.0 75.00 2066
7716 +23.6 2136 100 80 00 +17.6 69.4 ECU. +0.0 75.00 2173
7806 +23.3 1547 100 80 00 +17.8 10.4 ECU. +0.0 75.00 1533
Run over
7716 +19.1 197 2 00 00 +38.8 9.9 ECU. +0.0 ECU. 54
7593 +10.8 92 0 00 00 +38.9 10.6 ECU. +0.0 ECU. 132
7490 +1.9 104 0 00 00 +38.7 9.9 ECU. +0.0 ECU. 119
7407 -7.1 75 0 00 00 +28.8 6.0 ECU. +0.0 ECU. 79
7309 -11.8 60 0 00 00 +28.8 6.0 ECU. +0.0 ECU. 52
7168 -13.0 62 0 00 00 +28.9 6.0 ECU. +0.0 ECU. 124
7092 -13.0 55 0 00 00 +28.8 6.0 ECU. +0.0 ECU. 62
6973 -13.0 74 0 00 00 +28.8 6.0 ECU. +0.0 ECU. 79
6872 -13.0 78 0 00 00 +28.8 6.0 ECU. +0.0 ECU. 67
6802 -13.0 78 0 00 00 +28.7 6.0 ECU. +0.0 ECU. 88
6680 -13.0 75 0 00 00 +28.6 6.0 ECU. +0.0 ECU. 84
6561 -13.0 75 0 00 00 +28.9 6.0 ECU. +0.0 ECU. 76
6459 -13.0 74 0 00 00 +28.7 6.0 ECU. +0.0 ECU. 77
6385 -13.0 75 0 00 00 +28.5 6.0 ECU. +0.0 ECU. 76
6230 -13.0 73 0 00 00 +28.5 6.0 ECU. +0.0 ECU. 76
6127 -12.8 75 0 00 00 +28.6 6.0 ECU. +0.0 ECU. 72
5973 -12.8 74 0 00 00 +28.5 6.0 ECU. +0.0 ECU. 69
5847 -12.8 73 0 00 00 +28.5 6.0 ECU. +0.0 ECU. 73
5727 -12.8 73 0 00 00 +28.4 6.0 ECU. +0.0 ECU. 75
5592 -12.8 74 0 00 00 +28.5 6.0 ECU. +0.0 ECU. 76
5446 -12.5 73 0 00 00 +28.4 6.0 ECU. +0.0 ECU. 70
5307 -12.5 72 0 00 00 +28.3 6.0 ECU. +0.0 ECU. 72
5159 -12.5 72 0 00 00 +28.3 6.0 ECU. +0.0 ECU. 69
5042 -12.3 70 0 00 00 +28.3 6.0 ECU. +0.0 ECU. 73
4894 -12.3 72 0 00 00 +27.2 6.0 ECU. +0.0 ECU. 71
4775 -12.3 70 0 00 00 +26.1 6.0 ECU. +0.0 ECU. 77
Evolved Member
Joined: Sep 2003
Posts: 1,078
Likes: 61
From: Ulster County, NY
this is the first time the car has seen anything higher then 800ft in elevation. so going from 500ft or so to 3300 i was wondering how much of a difference that had on the car and i didnt know if a boost leak could cause what im having since i changed parts before i really even drove the car around here.
Mikesevo, that log isn't valid, because you start all your runs around 5000rpm and don't even peak until 5k. Is that even a stock turbo? Show a log starting at 3000rpm, because the stock turbo peaks closer to 3500rpm. Obviously, a turbo that peaks at 6k isn't going to taper much by 7k, but that's completely irrelevant in this thread.
Evolved Member
Joined: Sep 2003
Posts: 1,078
Likes: 61
From: Ulster County, NY
Mikesevo, that log isn't valid, because you start all your runs around 5000rpm and don't even peak until 5k. Is that even a stock turbo? Show a log starting at 3000rpm, because the stock turbo peaks closer to 3500rpm. Obviously, a turbo that peaks at 6k isn't going to taper much by 7k, but that's completely irrelevant in this thread.
people always say they make X amount of boost at 7k rpm!
but until it is logged i am no believer.
but until it is logged i am no believer.
Whoop_ass was referring to the stock turbo, and you knew that. The whole conversation leading up to his comments was in reference to the stock turbo's behavior.
Only one person failed here, and it was not me.
Only one person failed here, and it was not me.
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