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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: 13,912 Birkenhead
diggingdeeper

Wiki Master
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Wiki Master
Joined: Jul 2008
Posts: 13,912
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.
The further you are down the pay scale, the more 'essential' you are when the s--- hits the fan... Sue Farbysmith 2020
Insults are engendered from vulgar minds, like toadstools from a dunghill - Charles Caleb Colton
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
OP
Smartchild
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OP
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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Re: Supercharger for BMW
[Re: Neil_c]
#420526
19th Jul 2010 8:30pm
19th Jul 2010 8:30pm
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Joined: Jul 2010
Posts: 23 Bromborough
SteMars
Newbeee
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Newbeee
Joined: Jul 2010
Posts: 23
Bromborough
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I'd stay away from Turbo/Super chargers as they dont offer much value for the M50/M52 engines.. The M52B25 only has 187bhp as standard, so if yours has been RR'd at 218bhp then your doing very very well. Even if you swapped the motor for a M52B28 (the engine from the 328), fit the inlet manifold from your current motor and a pair of Shrick cams then I reckon you wont be getting more than 230-235bhp.... (circa £1500 all in) You could always get a S50B30 (the early E36 M3 non-vanos) engine which will be good for 286bhp if its healthy and has the tappets done correctly.... (circa £2000 w/out fitting) OR. Go down the S50B32 (Evo 231bhp) route, but beware of vanos issues and the reportedly fragile 6 speed box (circa £3k) Any M engine will be more expensive to run and service, but the noise and the performance are to die for! 
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Fishing
by diggingdeeper. 29th Jan 2021 5:16pm
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Sunrise Tue 6:55am
Sunset Tue 5:52pm
Local Time Tue 1:50pm
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