iam fitting the bike engine to my locost but to get the drive to the supercharger off the bike engine is gonna cost. so i was thinking of running a belt off the propshaft and putting the charger in the passenger foot well. what do you think. should i go for it. will it break the drive spockets or the bearing in the engine.
adam

does the supercharger not need drive related to engine speed rather than road speed as your feed would be taken after the gearbox?? Know little about superchargers and fuel mapping myself but would imagine you would need 6 fuel maps - one for each gear or am i totally wrong in thinking how superchargers work??

the prop shaft speed relates to wheel speed, not engine speed, so i say wrong move

Yup. As already spotted, it ain't going to work

Propshaft rotates relative to road speed not engine speed.....

bugger this is going to get exspensive. how do they get the drive from the engine then with out all the oil flying everywhere. but if i use the propshaft i could gear it up or down and use a bypass valve when the boost gets to much hmmmmm.
adam

save some hassle and buy a kit off TTS

http://cgi.ebay.co.uk/KAWASAKI-ZX14-SUPERCHARGER-KIT_W0QQitemZ330194555851QQihZ014QQcategoryZ10490QQrdZ1QQssPageNameZWD1VQQ_trksidZp1638.m118.l1247QQc mdZViewItem

quote:

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Originally posted by hardassfunk
save some hassle and buy a kit off TTS

http://cgi.ebay.co.uk/KAWASAKI-ZX14-SUPERCHARGER-KIT_W0QQitemZ330194555851QQihZ014QQcategoryZ10490QQrdZ1QQssPageNameZWD1VQQ_trksidZp1638.m118.l1247QQc mdZViewItem

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extension shaft through either the clutch or generator housing, with an oil seal and housing mounted onto the housing, shouldn't be impossible and certainly cheap enough

The ST1100 has a pulley on the end of the crank which runs the belt to the cam pulleys. That pulley is beyond an oil seal so it's pretty easy to add a second pulley to run a blower. Presumably chain drived cams will be inside the "oil compartment" and this wouldn't be an option....

or ditch the waterpump and use it as a donor for your parts...

don't know the BHP a waterpump can deliver tough...

Tks

Forget any idea about driving it from the propshaft, it's just isn't practical. If you gear it up enough to produce the boost you want in lower gears, you'll end up overspeeding it in higher gears. The propshaft UJ's will very likely not take kindly to the sideways thrust required to keep a supercharger belt tensioned.

here's a mad idea... don't know how or if it could ever work, or if the power it would take to run it would be worth while, but what about having one driven by an electric motor? you could put it anywhere then.
though it would take a lot of clever electronics to work out a system where the electric motor runs at the same speed as the engine...

Driving a super charger with a motor isn't really practicle. Small super charger probably needs about 15hp @ max speed and boost, that's a big motor and a big alternator to run it = very heavy. Incidently I think speed control might be the easy bit, I would look into using an ac motor straight from the alternator (un rectified) as the frequency and hence the motor speed would vary with engine speed.

Completly pointless speculation though

What engine are you fitting your blower too?

Davie

[Edited on 2/3/08 by daviep]