If one runs the mixture properly to keep the peak ICP out of the choke area, having choke in the barrel is a good thing. If one operates the mixture in such a manner so as to place the thetaPP too close to TDC, then not having choke could be a way to overcome the error slightly. Having no choke is one way of covering up poor technique. It is a sub-optimal way to do things IMO.

Walter


On Jun 26, 2006, at 12:24 AM, Tom Gourley wrote:

I recently ran across the website for Chuck Ney Enterpreses (http://www.chuckneyent.com/) and read where he advocates straight bore cylinders instead of tapered, or choked, cylinders.  I'm assuming the engine manufacturers have good reasons for designing taper into their cylinders (variable temperature expansion characteristics over the length of the cylinder?) Mr. Ney, on the other hand, claims a vast amount of experience indicating better performance and longevity by boring the cylinders straight.  I know we have some very knowledgeable engine people on the LML so I'd like to get their take on straight vs choke.
 
Tom Gourley
Legacy builder