norton & superchargers today + 1 turbo

Just wondering what differences there are between a regular engine with pistons drawing fuel/air in verses superchargers or turbos and ram air ...

Click to expand...

frankdamp said:

The 750/850 motors were derived from the 650SS and weren't very rugged if hammered hard. I would think forced induction would be too much for the mechanical strength of the bottom end. Lots of get up and go, but reduced life if you use it!

Click to expand...

Tintin said:

Hegel said:

Just wondering if any of you have had any experience with their superchargers?

Click to expand...

Yes, but not with Nortons. If I'd be tempted to fit one on a Norton it would be an Ogura TX04 or TX07. I'd definetly use a Roots derivative like this "Wankel" as they deliver a linear output over rpm. The alternatives like the small centrifugal Rotrex s/c feature a progressive output and IMHO that makes no sense for Norton engine charactersitics. However I'd think that adding a s/c would also mean upping the whole drivetrain to make it cope with the torque increase.

Click to expand...

The Aisin AMR500 http://superchargersunlimited.com/index.html which is probably the number 1 choice.

The centrifugal blower off a Seadoo RXP215 jetski http://www.personalwatercraft.com/manuf ... w-883.html

The Eaton M45 http://www.capa.com.au/eaton_m45data.htm

All these are easily found on places like ebay second hand, and they can all be pulled apart easily to fit new bearings etc.

The AMR500 is probably the pick as its small, and is a rootes style blower so calculating drive sizes for the right boost is easy. Trouble is they're getting a bit old and will need new bearings, and these are oddball sizes so the housings will need to be modified to suit standard sizes.

The Centrifugal is probably the easiest to fit drive wise, and modification parts are easily available. But a centrifugal pump increases boost exponentially so a blow off valve and a large plenum is needed, plus they increase the intake charge heat. So the plumbing gets interesting.

The Eaton, initially looked the goods, but they have a coated rotor so you can't really run these in a draw through installation like i was planning. The fuel coming through will eat away the coatings and possible the bearing lube. So if i wanted to use this blower i'd have to use a blow through carb setup, or use fuel injection.

At this point i'm still trying to figure out which way to go,
Use an SU carb and a draw though system (easiest), which means i have a blower full of fuel air vapour and could get amusing if it backfired:lol3 and can leak fuel through the bearings washing away the grease.
Or a blow through dry system, which means a very modified carby or fuel injection.

Click to expand...