Improve you gas mileage by 20% plus
Thread Starter
Banned
Joined: Mar 2006
Posts: 2,855
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From: Southern California
S600TT, R350
Improve you gas mileage by 20% plus
I know, it sounds like a spam commercial.
Just wanted to share some info.
Being in the business of making more power and thus using more fuel, this is exactly opposite of what I do, but with 91 gas getting up into $5 a gallon territory, I had 20 calls/emails/PMs asking me for how to save on gas.
I can tell you how to gain 20% plus in MPG, BUT at expense of 250HP.
If you are ready for sacrifice and do not mind driving a Corolla....................
It is really very simple - unplug your kompressor.
I know it sounds like her heresy, but you will get about 3-4 mpg at the expense of boost.
Ideally, one could make a switch to turn the kompressor off during cruise and turn on when it is needed.
You will get a a very slow car and a 'Check Engine Light", so beware.
Just wanted to share some info.
Being in the business of making more power and thus using more fuel, this is exactly opposite of what I do, but with 91 gas getting up into $5 a gallon territory, I had 20 calls/emails/PMs asking me for how to save on gas.
I can tell you how to gain 20% plus in MPG, BUT at expense of 250HP.
If you are ready for sacrifice and do not mind driving a Corolla....................
It is really very simple - unplug your kompressor.
I know it sounds like her heresy, but you will get about 3-4 mpg at the expense of boost.
Ideally, one could make a switch to turn the kompressor off during cruise and turn on when it is needed.
You will get a a very slow car and a 'Check Engine Light", so beware.
Senior Member
Joined: Sep 2006
Posts: 329
Likes: 1
e55
Or you could get a lightweight stock diameter crank pulley and get the same 3mpg+ without sacrificing any boost at all . Sounds much better than losing 50% HP haha.
Royal Purple will help a bit too but not nearly as much as CP.
Royal Purple will help a bit too but not nearly as much as CP.
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Thread Starter
Banned
Joined: Mar 2006
Posts: 2,855
Likes: 2
From: Southern California
S600TT, R350
Or you could get a lightweight stock diameter crank pulley and get the same 3mpg+ without sacrificing any boost at all . Sounds much better than losing 50% HP haha.
Kompressor take anywhere from 25 to 70HP to spin, plus fuel enrichment from the boost are responsible for MPG gain.
Royal Purple is no better than Mobil 1.
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From: orlando/hk/mainland china
2003 e55
so if i unplug it and drive.. check engine light comes out.. would the computer of the car go nuts and break down on me? or wouldnt it still dump the same amount of fuel even if the supercharger is unplugged?
Thread Starter
Banned
Joined: Mar 2006
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From: Southern California
S600TT, R350
I wish these damn cars had a boost gauge. Doesn't the kompressor only kick in under certain loads and not under "regular" driving?
Thread Starter
Banned
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From: Southern California
S600TT, R350
so if i unplug it and drive.. check engine light comes out.. would the computer of the car go nuts and break down on me? or wouldnt it still dump the same amount of fuel even if the supercharger is unplugged?
Fuel is added through map values that corresopnd to boost level, if there is no boost - there is no extra fuel.
Thread Starter
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From: Southern California
S600TT, R350
The only concern about a switch - what happens if it the kompressor gets turned on at 80 mph?
At that speed a 40HP load from kompressor either will throw the belt off or fry the clutch.
Will DME not allow this to happen?
Until I try it I will not know.
CEL will happen due to missing boost vs. throttle pedal postion vs. load.
I will keep digging.
At that speed a 40HP load from kompressor either will throw the belt off or fry the clutch.
Will DME not allow this to happen?
Until I try it I will not know.
CEL will happen due to missing boost vs. throttle pedal postion vs. load.
I will keep digging.
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Joined: Aug 2005
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From: Southern Cali (Ontario)
I have done this to my C32 to trouble shoot a bad IC pump...
from a stop.. it not that bad.. but making a pass is takes for ever.
On my E, I have thought about this... but not tried it.
BTW: on my C32 no CEL's.
from a stop.. it not that bad.. but making a pass is takes for ever.
On my E, I have thought about this... but not tried it.
BTW: on my C32 no CEL's.
MBWorld Fanatic!
Joined: May 2004
Posts: 1,654
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From: orange county, ca
2006 E55
The only concern about a switch - what happens if it the kompressor gets turned on at 80 mph?
At that speed a 40HP load from kompressor either will throw the belt off or fry the clutch.
Will DME not allow this to happen?
Until I try it I will not know.
CEL will happen due to missing boost vs. throttle pedal postion vs. load.
I will keep digging.
At that speed a 40HP load from kompressor either will throw the belt off or fry the clutch.
Will DME not allow this to happen?
Until I try it I will not know.
CEL will happen due to missing boost vs. throttle pedal postion vs. load.
I will keep digging.
dont you have jangy's car you can try it on??
Never thought about the switch being used at driving speed. How about a switch that can only be switched when the car is off?
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From: SoCal
C63S coupe, X5M
Would love to have this switch for valet and the day I have to let a girl drive it.
How do you manually turn off the supercharger?
And shut off jangys SC
How do you manually turn off the supercharger?
And shut off jangys SC
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From: San Diego
2015 S212
MBWorld Fanatic!
Joined: May 2004
Posts: 1,654
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From: orange county, ca
2006 E55
