Does Your Turbo Surge??
Sep 13, 2006, 04:38 PM
#1
Does Your Turbo Surge??
Hi All,
I would like to hear feedback from members regarding your experience with compressor surge using turbos in varrious setups on the evo. Please take a minute to share the following:
Turbo
Cams
BOV
Displacement
Does it surge
I am trying to make some decisions about what path to head down with a future build. Any input you can provide will be greatly appreciated. Thanks!!
EVOlutionary
I would like to hear feedback from members regarding your experience with compressor surge using turbos in varrious setups on the evo. Please take a minute to share the following:
Turbo
Cams
BOV
Displacement
Does it surge
I am trying to make some decisions about what path to head down with a future build. Any input you can provide will be greatly appreciated. Thanks!!
EVOlutionary
Last edited by EVOlutionary; Sep 13, 2006 at 06:40 PM.
Sep 13, 2006, 04:40 PM
#3
Turbo - stock
Cams - stock
BOV - stock
Displacement - stock
Does it surge - no
Turbo - stock
Cams - HKS 280s
BOV - Greddy Type S
Displacement - stock
Does it surge - no
Turbo - stock
Cams - HKS 280s
BOV - Tial
Displacement - stock
Does it surge - YES
Cams - stock
BOV - stock
Displacement - stock
Does it surge - no
Turbo - stock
Cams - HKS 280s
BOV - Greddy Type S
Displacement - stock
Does it surge - no
Turbo - stock
Cams - HKS 280s
BOV - Tial
Displacement - stock
Does it surge - YES
Sep 13, 2006, 06:21 PM
#7
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Turbo - White Rabbit
Cams - HKS 272s
BOV - Tial
Displacement - Stock
Surge - No
Part of the reason for this may be my method of boost control. I'm using the MaftPro to control boost and my wastegate duty cycle remains at 0% until my TPS voltage reaches a set value (I don't recall where I have it set, but it's around 4 volts).
-Paul
Cams - HKS 272s
BOV - Tial
Displacement - Stock
Surge - No
Part of the reason for this may be my method of boost control. I'm using the MaftPro to control boost and my wastegate duty cycle remains at 0% until my TPS voltage reaches a set value (I don't recall where I have it set, but it's around 4 volts).
-Paul
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Sep 13, 2006, 06:40 PM
#8
Originally Posted by nothere
evol......
you are saying the TIAL bov can cause surge
you are saying the TIAL bov can cause surge
Only posting my experience. I am hoping to get a fairly large database of general setups to try to see trends. Thanks everyone for responding so far!
Originally Posted by PVD04
Turbo - White Rabbit
Cams - HKS 272s
BOV - Tial
Displacement - Stock
Surge - No
Part of the reason for this may be my method of boost control. I'm using the MaftPro to control boost and my wastegate duty cycle remains at 0% until my TPS voltage reaches a set value (I don't recall where I have it set, but it's around 4 volts).
-Paul
Cams - HKS 272s
BOV - Tial
Displacement - Stock
Surge - No
Part of the reason for this may be my method of boost control. I'm using the MaftPro to control boost and my wastegate duty cycle remains at 0% until my TPS voltage reaches a set value (I don't recall where I have it set, but it's around 4 volts).
-Paul
Last edited by EVOlutionary; Sep 13, 2006 at 06:42 PM.
Sep 13, 2006, 06:43 PM
#9
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turbo - TME
cams - 272's
bov - APS dual vent
displacement - stock
I only experience surge in the upper gears during part throttle release, say going from 80% throttle down to 30-40% throttle, and the weather has to be below about 45 F. If it's warmer than that, no surging. No surging at WOT, and no surging when just cruising in any gear.
cams - 272's
bov - APS dual vent
displacement - stock
I only experience surge in the upper gears during part throttle release, say going from 80% throttle down to 30-40% throttle, and the weather has to be below about 45 F. If it's warmer than that, no surging. No surging at WOT, and no surging when just cruising in any gear.
Sep 13, 2006, 07:01 PM
#11
2 types I am familiar with:
LOW RPM SURGE: You go WOT in 5th gear at 2500 or 3000 rpms and your turbo makes a "choo choo choo" sounds as there is a rapid pressure differential happening. Usually occompanied by the BOV opening and closing rapidly. Basically the turbo is trying to blow more air into the engine than it can use.
PART THROTTLE SURGE: You go to pass a semi on the freeway and you give it say, 1/2 throttle. Your boost comes up a bit, say 5-15psi, but doesn't max out because you aren't wide open. The BOV flutters/stutters, and if violent enough the car can buck back and forth. You need to let off the gas or go full throttle to get rid of it. In my situation it happens when I try to hold part throttle through a turn on a race track.
(this is all just *to the best of my knowledge*. this is the way I understand surge from what I've read on here and other sites)
LOW RPM SURGE: You go WOT in 5th gear at 2500 or 3000 rpms and your turbo makes a "choo choo choo" sounds as there is a rapid pressure differential happening. Usually occompanied by the BOV opening and closing rapidly. Basically the turbo is trying to blow more air into the engine than it can use.
PART THROTTLE SURGE: You go to pass a semi on the freeway and you give it say, 1/2 throttle. Your boost comes up a bit, say 5-15psi, but doesn't max out because you aren't wide open. The BOV flutters/stutters, and if violent enough the car can buck back and forth. You need to let off the gas or go full throttle to get rid of it. In my situation it happens when I try to hold part throttle through a turn on a race track.
(this is all just *to the best of my knowledge*. this is the way I understand surge from what I've read on here and other sites)
Sep 13, 2006, 07:09 PM
#13
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Originally Posted by EVOlutionary
2 types I am familiar with:
LOW RPM SURGE: You go WOT in 5th gear at 2500 or 3000 rpms and your turbo makes a "choo choo choo" sounds as there is a rapid pressure differential happening. Usually occompanied by the BOV opening and closing rapidly. Basically the turbo is trying to blow more air into the engine than it can use.
PART THROTTLE SURGE: You go to pass a semi on the freeway and you give it say, 1/2 throttle. Your boost comes up a bit, say 5-15psi, but doesn't max out because you aren't wide open. The BOV flutters/stutters, and if violent enough the car can buck back and forth. You need to let off the gas or go full throttle to get rid of it. In my situation it happens when I try to hold part throttle through a turn on a race track.
(this is all just *to the best of my knowledge*. this is the way I understand surge from what I've read on here and other sites)
LOW RPM SURGE: You go WOT in 5th gear at 2500 or 3000 rpms and your turbo makes a "choo choo choo" sounds as there is a rapid pressure differential happening. Usually occompanied by the BOV opening and closing rapidly. Basically the turbo is trying to blow more air into the engine than it can use.
PART THROTTLE SURGE: You go to pass a semi on the freeway and you give it say, 1/2 throttle. Your boost comes up a bit, say 5-15psi, but doesn't max out because you aren't wide open. The BOV flutters/stutters, and if violent enough the car can buck back and forth. You need to let off the gas or go full throttle to get rid of it. In my situation it happens when I try to hold part throttle through a turn on a race track.
(this is all just *to the best of my knowledge*. this is the way I understand surge from what I've read on here and other sites)
Sep 13, 2006, 07:17 PM
#14
Originally Posted by GinuwineEvo8
That low RPM surge you speak of is not surge - thats just a BOV not opening up . . .
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