You can use an air or smog pump standard equipment on many autos from the 70s and 80s, and just reverse the hookups so that instead of blowing it is sucking air. They were belt driven in plentiful supply, easy to rig, light weight, and low on hp draw.
Colin & Bev Rainey KR2(td) N96TA Sanford, FL crain...@cfl.rr.com http://kr-builder.org/Colin/index.html
