Clutchless supercharger pulley
Clutchless supercharger pulley
Just an idea i had. I think it would eliminate the lag of the s/c kicking in and make throttle response insane. Might hurt gas mileage a bit. Sure simplifies things though. Just an idea, and i wanted to be the first to suggest it so 5 years from now when someone searches it was my idea
What if you changed the size as well, increasing boost but requiring no need for crank pulley swap. Im just brainstorming here...
What if you changed the size as well, increasing boost but requiring no need for crank pulley swap. Im just brainstorming here...
Re: Clutchless supercharger pulley
actually I suggested the idea before you, so and I'm sure it was thought up before I made mention to it.
a lot of the mods you see everyone doing here almost 99% of them came from MBZ forums like MBworld website
a lot of the mods you see everyone doing here almost 99% of them came from MBZ forums like MBworld website
Last edited by Maxwell; 01-18-2008 at 03:22 PM.
Re: Clutchless supercharger pulley
Originally Posted by Maxwell
actually I suggested the idea before you, so and I'm sure it was thought up before I made mention to it.
a lot of the mods you see everyone doing here almost 99% of them came from MBZ forums like MBworld website
a lot of the mods you see everyone doing here almost 99% of them came from MBZ forums like MBworld website
so have any of the MB guys tried it yet? hell have any of the MB guys gone 11's in their slk32s yet? the cars been out long enough...
Re: Clutchless supercharger pulley
Originally Posted by Shawnkey
I was thinking, of just shorting it so it's alway all the way on.
I just realized what you meant...are you sure itd be always engaged vs. always disengaged?
Last edited by 240M3SRT; 01-19-2008 at 10:05 AM.
Re: Clutchless supercharger pulley
If i could get my hands on a busted s/c one i wouldnt mind starting this project off, but i daily drive my car. Now someone like HDDP with a torn down motor...he loves playing with **** like this anyway
Fixed pulley, different size(smaller = more psi on s/c i think). Questions is...what will the ecu think. If no issues and gas mileage doesnt just get retarted low, its a nice option to other crank pulleys in the $1200-$1400 range.
Fixed pulley, different size(smaller = more psi on s/c i think). Questions is...what will the ecu think. If no issues and gas mileage doesnt just get retarted low, its a nice option to other crank pulleys in the $1200-$1400 range.
Re: Clutchless supercharger pulley
I agree, a solid pulley is a great idea. Why in the world would you want a BOV after the throttle body? Turbo cars use them to combat pressure spikes when the throttle blades are shut suddenly, which slows the compressor wheel in the turbo.
If I'm not mistaken(which I've been known to do ), a bypass valve on a positive displacement supercharger is completely differant than a BOV on a turbo or centrifical SC. BOVs vent to atmosphere, bypass valves simply bypass the intake path aroumd the supercharger. If the SC is bypassed during cruising speeds and Idle then it is not compressing air, so parisitic loss is minimized at low loads. This gives better mpg, eccentially what the SC clutch does.
If you look at all of the hot rod cars and boats over the years who have had roots type superchargers, non of them have had bypass valves.
If I'm not mistaken(which I've been known to do ), a bypass valve on a positive displacement supercharger is completely differant than a BOV on a turbo or centrifical SC. BOVs vent to atmosphere, bypass valves simply bypass the intake path aroumd the supercharger. If the SC is bypassed during cruising speeds and Idle then it is not compressing air, so parisitic loss is minimized at low loads. This gives better mpg, eccentially what the SC clutch does.
If you look at all of the hot rod cars and boats over the years who have had roots type superchargers, non of them have had bypass valves.
Re: Clutchless supercharger pulley
Originally Posted by JeremyAnderson
I agree, a solid pulley is a great idea. Why in the world would you want a BOV after the throttle body? Turbo cars use them to combat pressure spikes when the throttle blades are shut suddenly, which slows the compressor wheel in the turbo.
If I'm not mistaken(which I've been known to do ), a bypass valve on a positive displacement supercharger is completely differant than a BOV on a turbo or centrifical SC. BOVs vent to atmosphere, bypass valves simply bypass the intake path aroumd the supercharger. If the SC is bypassed during cruising speeds and Idle then it is not compressing air, so parisitic loss is minimized at low loads. This gives better mpg, eccentially what the SC clutch does.
If you look at all of the hot rod cars and boats over the years who have had roots type superchargers, non of them have had bypass valves.
If I'm not mistaken(which I've been known to do ), a bypass valve on a positive displacement supercharger is completely differant than a BOV on a turbo or centrifical SC. BOVs vent to atmosphere, bypass valves simply bypass the intake path aroumd the supercharger. If the SC is bypassed during cruising speeds and Idle then it is not compressing air, so parisitic loss is minimized at low loads. This gives better mpg, eccentially what the SC clutch does.
If you look at all of the hot rod cars and boats over the years who have had roots type superchargers, non of them have had bypass valves.
Re: Clutchless supercharger pulley
thought about this a week ago and I am not the first either, but found some bad news
I don't know how the OEM ECU would react (throw a CEL, etc.) if you bypassed the system and installed a manual switch, but it's really easy to do.... Might be worth experimenting on....
Just found some info on this and it will not work being engaged all the time
more info from that same thread
http://www.mbworld.org/forums/showthread.php?t=155448
my initial thread
https://www.crossfireforum.org/forum...ad.php?t=20931
Now that I have researched the subject I have decided to use the clutch to my advantage. If let motorsports can get their Twin turbo setup to work, I would love to do a twin charged setup on my car with a single rear mounted turbo.
Originally Posted by HDDP
I don't know how the OEM ECU would react (throw a CEL, etc.) if you bypassed the system and installed a manual switch, but it's really easy to do.... Might be worth experimenting on....
http://www.mbworld.org/forums/showthread.php?t=155448
my initial thread
https://www.crossfireforum.org/forum...ad.php?t=20931
Now that I have researched the subject I have decided to use the clutch to my advantage. If let motorsports can get their Twin turbo setup to work, I would love to do a twin charged setup on my car with a single rear mounted turbo.
Last edited by SRTpowa; 01-19-2008 at 08:56 PM.
Re: Clutchless supercharger pulley
Originally Posted by Shawnkey
I was thinking, of just shorting it so it's alway all the way on. Have'nt researched the idea much, just a thought though.
Leave the thing alone unless you are building a purpose built engine... Look at chilling your charge air and you'll gain serious HP...
Re: Clutchless supercharger pulley
Originally Posted by HDDP
Not a good idea... Engine won't idle well... on/off switch is OK, but remember that with the SC off your intake air is flowing thru the SC "MAZE" of non-turning screws...
Leave the thing alone unless you are building a purpose built engine... Look at chilling your charge air and you'll gain serious HP...
Leave the thing alone unless you are building a purpose built engine... Look at chilling your charge air and you'll gain serious HP...
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