http://www.oldsonline.com Oldsmobile Tech and Olds Forums Fri, 20 Jun 2008 07:17:42 +0000 http://backend.userland.com/rss092 en The Oldsmobile IRL Aurora V8 was a electronically fuel injected engine that revved up to 10,500 RPM's and produced well over 600 horsepower.  Designed for the Indy Racing League (IRL).  Specs: 4.0L (244ci) V8 102mm Cylinder Bore Spacing DOHC 4 Valve/Cylinder 10,500 Max RPM 600+ Horsepower Methanol Fuel http://www.oldsonline.com/2008/06/oldsmobile-indy-car-engine/ The factory HP ratings of the 60's have as much credibility as $h!+. Keep in mind that the 70 W-30, which had a more radical cam and better flowing heads and intake than the W-34, was only rated at 370 HP. Mighty suspicious until you realize that GM Corporate mandated ... http://www.oldsonline.com/2008/06/oldsmobile-horsepower-numbers/ Experimental 455 Engines Aluminum 2 Valve 455 The aluminum Can-Am motor you are refering to is actually an aluminum version of the pushrod 455 block and heads! The motor was used in the McKee Can-Am cars of the 60s (one of which was sponsored by the Smothers Brothers, who also sponsored a ... http://www.oldsonline.com/2008/06/experimental-olds-455-engines/