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Supercharged Race Side Valve

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Post Fri Apr 02, 2010 2:29 pm

Posts: 587
Location: Crewe, Great Britain

Hi all,

This is the time in my life when I'm thinking of a new race bike project before arthritis gets the better of me...

Been trawling the web a bit but can't find much info or experiences by others on supercharging a side valve vee twin...

Anybody out here that might have some useful links or some personal experience on the matter?

Thanks in advance,

Patrick

Post Fri Apr 02, 2010 3:27 pm
jib

Posts: 575
Location: devon,england
hi patrick there is some stuff on you tube like this

http://www.youtube.com/watch?v=CSVG9Wtnamc

not sure how to contact via youtube but there must be a way,
regards jib
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years

Post Fri Apr 02, 2010 4:49 pm
panic

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Last edited by panic on Sun Nov 28, 2010 5:44 pm, edited 1 time in total.

Post Sat Apr 03, 2010 3:41 am

Posts: 587
Location: Crewe, Great Britain

Hi,

Thanks for the links,

Panic, I did saw your page on superchargers choice recently, but not that one, so more food for thoughts...

I'm looking for side valve info in particular, since their CR and ignition advance are already a lot lower than OHV set ups, hence could we infer that we could cram a lot more mixture in them before hitting the usual supercharged OHV problems?

Patrick

Post Tue Apr 13, 2010 2:22 pm

Posts: 176
Location: Carmarthen, Wales, UK
Patrick, I know this is for V8 car engines but maybe worth a look?

http://www.roadrunnerengineering.com/
72 Ironhead, goes better than it stops!

42(?)WLC

79FLH

2005 XL1200R.... well ya gotta have a rat-bike!

Post Wed Apr 28, 2010 5:14 pm
jib

Posts: 575
Location: devon,england
patric howabout a turbo instead! but anyway check this out if for nothing else just the way it revs,
regards jib

http://www.youtube.com/watch?v=_vw_LsEhzco
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years

Post Thu Apr 29, 2010 8:04 am
panic

..
Last edited by panic on Sun Nov 28, 2010 5:44 pm, edited 1 time in total.

Post Thu Apr 29, 2010 9:19 am
jib

Posts: 575
Location: devon,england
hi panic,
was wondering if patric could contact them througth the company,as hes here in england its not like hes in direct competion, and as you say apart from the actual device for boosting the atmospheric pessure all the other tuning tricks should be the same, super v turbo.
there is a vid of a 73 iron head on youtube showing how the drive for a small super charger unit [looks like a metro turbo unit modified,but isnt ] is run off the primary,to a jack shaft between the cylinders and then a belt up to the unit mounted under a frisco'd tank.

http://www.youtube.com/watch?v=3nERnQ7QtKk

this is another vid showing the type of supercharger

http://www.youtube.com/watch?v=Vh1o9275 ... re=related

there is a bit of blurb under the flatty vid that says...
Uploader Comments (americancyclefab)
americancyclefab An immense amount of work has been done internally - everything you could imagine to be able to sustain this kind of torque and horsepower. Among other things a special set of turbo cams designed and built by American Cycle Fabrication. This motor pulls 70 horsepower naturally aspirated!

regards jib
Dude, check out that jibhead, he's crazy. Hasn't been sober for 40 years

Post Fri Apr 30, 2010 5:49 am

Posts: 587
Location: Crewe, Great Britain

Hi Panic, Jib,

I don't fancy using a turbo, I have one on my car, I hate the way it behaves... Engine's got plenty of umphhh but it always feels like it's pulling 20 tonnes behind, weird...

Gonna go for a lobe type supercharger I think, found some in Australia of all places...

Still haven't got the engine either!!! Planning to use a KH engine...

Patrick


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