Roof 101 Cyclone OHV Model A Ford Engine Conversion - Clip #2

This is the 2010 4 Port OHV conversion for the Model A and B Ford. It's modeled after the 1929 R&R Cyclone originally created by Robert Roof of Anderson, Indiana, USA. Charlie Yapp, owner of Scalded Dog Speed Parts contacted Jim Roof, Robert's grandson, and Jim became the new "Chief Designer" and Charlie the producer. The end result is nothing short of a wildly successful mechanical achievement . The power and inefficiency are huge and surprising. The parts are mostly off the shelf at your local dealer. If you get a chance to see one take a close look at the technology, it's different and edgy but still look and sound like a period racing engine. On Our website. . .www.secretsofspeed.com. . .you will be able to find the Dyno chart links and much more. . .like contact info. Yapp also manufactures the famous Riley Two Port OHV and the Lion Speed Head.

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ROOF 101 CYCLONE ENGINE 1
This video is a walk around of the Roof 101 Cyclone OHV conversion for Model A and B Fords. This is cylinder head #1. It is mounted onto a hopped up 1933 Model B engine and a 1929 Model A chassis. A bit more detailing is needed and then the exciting start up. Originally created in 1929 by Robert Roof and called R&R Cyclone overhead valve. This conversion (one of 65 units made in 2010) was co-created by Charlie Yapp and Jim Roof. The "101" name is based off Jim's grandfather's (Robert Roof) advertising stating the "1929 Model A Ford Roadster went 101 MPH." I suspect this design will do much more than that, as its volumetric efficiency is higher than most NASCAR engines. Learn more at www.secretsofspeed.com . . . about Scalded Dog Speed Parts and the Secrets Of Speed Society.





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