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Re: Supercharger for BMW
[Re: Sanchez]
#418861
9th Jul 2010 7:32pm
9th Jul 2010 7:32pm
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Joined: Dec 2003
Posts: 5,683 Bebington, Wirral
DavidB
Wiki Guide
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Wiki Guide
Joined: Dec 2003
Posts: 5,683
Bebington, Wirral
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Do you mean 12v electric superchargers?
I'd also go down the M3 engine route. I wanted to do this to a 2002, but was beyond my skills and just lost interest.
"C20 LET bang"
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Re: Supercharger for BMW
[Re: chris_gilly]
#418868
9th Jul 2010 8:17pm
9th Jul 2010 8:17pm
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Joined: Sep 2009
Posts: 417 birkenhead
Neil_c
OP
Smartchild
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OP
Smartchild
Joined: Sep 2009
Posts: 417
birkenhead
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saw this one: ebay If only 15 would make the car go faster!
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Re: Supercharger for BMW
[Re: Neil_c]
#418912
10th Jul 2010 1:29am
10th Jul 2010 1:29am
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Joined: Jul 2008
Posts: 14,116 Birkenhead
diggingdeeper

Wiki Master
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Wiki Master
Joined: Jul 2008
Posts: 14,116
Birkenhead
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I also like one advert that claims it extends engine life  The electric ones will improve power at lower revs but haven't got the power at higher revs. I am surprised nobody has brought out a hybrid system, electric and pulley driven, as each counteracts the other's shortcomings but turbos seem to be the order of the day. I wonder if anyone has come up with an active exhaust extraction/decompression system? Turbos must increase the pressure at the exhaust, this is an inefficiency which must be similar to the power required for a supercharger. I laughed at another gimmick where one was powered from the vacuum line - this would mean you were extracting air from the vacuum line and then pumping air in before it, overall this has got to lose power not gain, alright if you just want a "shiny" under the bonnet but no good for Santa Pod.
We don't do charity in Germany, We pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn
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Re: Supercharger for BMW
[Re: sean]
#418946
10th Jul 2010 10:09am
10th Jul 2010 10:09am
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Joined: Sep 2009
Posts: 417 birkenhead
Neil_c
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Smartchild
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Smartchild
Joined: Sep 2009
Posts: 417
birkenhead
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I have thought about it but they'll all do about the same top end and whislt the sub and evo are between 1-2 secs quicker on 0-60; I get 35mpg, they'll struggle to do about 20 - 25mpg. Plus insurance, tax and servicing are more.
For a car I drive about once a week, it's not really worth it.
Last edited by Neil_c; 10th Jul 2010 10:10am.
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Re: Supercharger for BMW
[Re: Neil_c]
#418948
10th Jul 2010 10:17am
10th Jul 2010 10:17am
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Joined: Nov 2003
Posts: 12,002 Wirralshire
StuyMac
Wiki Master
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Wiki Master
Joined: Nov 2003
Posts: 12,002
Wirralshire
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Electric superchargers are junk on the whole. They can do something for very small engined cars where the air demand is quite low, but on a big cc car they cannot keep up with the air demand, and cause a restriction in the intake. What BMW do you have? If your knocking on the door of 155, then you are already at M3 speeds  Id think about spending money on suspension / brakes and keep the car normally aspirated as it will be far more reliable.
What If There Were No Hypothetical Questions?
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