Both of which have unfortunately not written books on engine tuning (allthough in the past 30 years there is a wealth of info in CL's "engine clinic" column in RCM, and Dubb has some good stuff on his website).

I recommend reading the control line speed and free flight columns in Model Aviation, and also anything on the net in regards to CL racing and speed. These are the guys that really know how to tune engines...

If guys like George Aldrich wrote down what they knew about engines befor ethey passed away, it would be priceless information for the rest of us "hack" tuners. But most do not and there are very few books around containing that info. Most (I do have a few) are old and hard to get, written in the heydays of modelling in the 50's and 60's.

Sometimes its fun just to buy a few of the same engines and " experiment" on them to see what works and what doesnt.

Andrew Coholic