Does the C32 have a bypass valve on the supercharger?
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Does the C32 have a bypass valve on the supercharger?
If it does, i just figured out something very significant for our cars....i was reading some info in a thread on the E55 forum and i think i figured out why our cars are so sluggish below 3000rpms...
anyone know?
anyone know?
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I was counting on you to know the answer to that question. When I searched recent threads about the same question I found the answer here: https://mbworld.org/forums/showthrea...ghlight=bypass
Thing is, you answered the question in that thread. Are you doubting yourself now?
Thing is, you answered the question in that thread. Are you doubting yourself now?
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There is no bypass valve on C32.
Your C32 should not be sluggish under 3000 rpm. If it is, than you might have something wrong. Get a hold of OBDII scanner and look at data stream and error codes.
Your C32 should not be sluggish under 3000 rpm. If it is, than you might have something wrong. Get a hold of OBDII scanner and look at data stream and error codes.
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C32
Originally Posted by m444
It must have a bypass. Where does the air from the blower go, when the throttle plate slams shut, after the engine was just at full boost (over 5k RPM)?
It goes through the bypass. Normally the bypass diaphram is driven from the manifold vacuum.
These C32 have positive displacement blowers, which always have a bypass. I suppose one could use a blowoff valve, if there is no MAF sensor.
It goes through the bypass. Normally the bypass diaphram is driven from the manifold vacuum.
These C32 have positive displacement blowers, which always have a bypass. I suppose one could use a blowoff valve, if there is no MAF sensor.
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Originally Posted by ScottW911
I was counting on you to know the answer to that question. When I searched recent threads about the same question I found the answer here: https://mbworld.org/forums/showthrea...ghlight=bypass
Thing is, you answered the question in that thread. Are you doubting yourself now?
Thing is, you answered the question in that thread. Are you doubting yourself now?
why would the E55 have it and ours does not? is it not the same setup with just a smaller supercharger?
the E55 has a clutch for the supercharger and a bypass valve, fyi...
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Doesn't the S/C kick in at 2900 rpm or is it 44% load or a combination of both? If it is just a straight 2900 rpm, than isn't that why it would feel like it's bleeding below 3000 rpm? Having driven turbo charged cars since the early designs of 1978, I am used to the old turbo lag, but I've never figured out why there would be a supercharger lag. Any technicians out there able to explain?
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Originally Posted by Vadim @ MBLN
There is no bypass valve on C32.
Your C32 should not be sluggish under 3000 rpm. If it is, than you might have something wrong. Get a hold of OBDII scanner and look at data stream and error codes.
Your C32 should not be sluggish under 3000 rpm. If it is, than you might have something wrong. Get a hold of OBDII scanner and look at data stream and error codes.
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Originally Posted by Bif powell
I have been asking myself this same question ever since I saw the first mention of the 2900+ s/c kick-in. Can we change this threshold 
it would be nice if we could get a tuner to figure out a way to lock-in the supercharger sooner...
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From: OC
C32
Originally Posted by 1FASTC32
it would be nice if we could get a tuner to figure out a way to lock-in the supercharger sooner...
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All positive displacement blowers producing over 5lbs of boost must have a means of dumping boost. C32s make 300 ft-lb at 2300rpms; torque peak is 332ft.lbs at 4400rpms with 14.5psi of change pressure / boost. without a bypass valve, 14psi of boost can damage head gaskets, rings seals or other pats of your engine.
Even with a magnetic compressor clutch, at light throttle, deceleration, transmission shifting, damaging boost surge can happing causing damage to your engine. There must be some means of controlling over boosting.
Boost surge is when changed air is being forced into a closed throttle, until the pressure is higher than the amount of boost being created by the supercharger.
I can’t find any mention of a by pass valve in EPC and WIS programs, AMGs are consider euros in the USA and as such not be supported by theses USA programs.
According to MB a compressor squeaks is caused by “friction vibration on compressor coupling” meaning when the compressor clutch is engaging. Remedy “it is not allowed to replace the compressor when theses complains occur, this motor specific noise is state or the at, at best, replacement of these parts leads to a temporary solution of the problem and customer dissatisfaction will increase”
I wonder how many supercharger unrelated noises are being diagnosed as “compressor squeaks”, by MB techs, only time will tell.
Even with a magnetic compressor clutch, at light throttle, deceleration, transmission shifting, damaging boost surge can happing causing damage to your engine. There must be some means of controlling over boosting.
Boost surge is when changed air is being forced into a closed throttle, until the pressure is higher than the amount of boost being created by the supercharger.
I can’t find any mention of a by pass valve in EPC and WIS programs, AMGs are consider euros in the USA and as such not be supported by theses USA programs.
According to MB a compressor squeaks is caused by “friction vibration on compressor coupling” meaning when the compressor clutch is engaging. Remedy “it is not allowed to replace the compressor when theses complains occur, this motor specific noise is state or the at, at best, replacement of these parts leads to a temporary solution of the problem and customer dissatisfaction will increase”
I wonder how many supercharger unrelated noises are being diagnosed as “compressor squeaks”, by MB techs, only time will tell.
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All positive displacement blowers producing over 5lbs of boost must have a means of dumping boost. C32s make 300 ft-lb at 2300rpms; torque peak is 332ft.lbs at 4400rpms with 14.5psi of change pressure / boost. without a bypass valve, 14psi of boost can damage head gaskets, rings seals or other pats of your engine.
Even with a magnetic compressor clutch, at light throttle, deceleration, transmission shifting, damaging boost surge can happing causing damage to your engine. There must be some means of controlling over boosting.
Boost surge is when changed air is being forced into a closed throttle, until the pressure is higher than the amount of boost being created by the supercharger.
I can’t find any mention of a by pass valve in EPC and WIS programs, AMGs are consider euros in the USA and as such not be supported by theses USA programs
C32AMG/02, save yourself some time and just please use search function. There are numerous pages on C32 tech and R&D on this forum going back to 2003.
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Originally Posted by Bif powell
I have been asking myself this same question ever since I saw the first mention of the 2900+ s/c kick-in. Can we change this threshold
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[QUOTE]we are still unsure about the whole 2900 rpm/44% load question [QUOTE]
It is correct. However, in most driving conditions you are rarely below 44% load.
Can it be changed? My guess yes. The problem is who is going to spend R&D time to locate the maps in the software and test them.
It is correct. However, in most driving conditions you are rarely below 44% load.
Can it be changed? My guess yes. The problem is who is going to spend R&D time to locate the maps in the software and test them.
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Originally Posted by Vadim @ MBLN
The problem is who is going to spend R&D time to locate the maps in the software and test them.
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Originally Posted by Bif powell
I have been asking myself this same question ever since I saw the first mention of the 2900+ s/c kick-in. Can we change this threshold
Vadim, do you need to hack the software or can you just create a "short circuit" on the solenoid that switches the clutch?
Downside, of course, would be that the engine could not protect itself if, for example, your intercooler pump died and intake air was too hot.
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Better yet, have an override switch to turn the sucker on nonstop when you need it.
Vadim, do you need to hack the software or can you just create a "short circuit" on the solenoid that switches the clutch?
Downside, of course, would be that the engine could not protect itself if, for example, your intercooler pump died and intake air was too hot.
Vadim, do you need to hack the software or can you just create a "short circuit" on the solenoid that switches the clutch?
Downside, of course, would be that the engine could not protect itself if, for example, your intercooler pump died and intake air was too hot.
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Originally Posted by Vadim @ MBLN
If kompressor clutch is rigged to be on all the time transmission will not shift. This was the very first thing I tried when I got my C32 back in 2002.
air, amg, bypass, c230, c32, compressor, e55, engage, engagement, kompressor, mb, slugish, squeak, supercharger, valve
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