ORIGINAL: DagTheElder
Hi Gordon,
Ther are a lot of things one can do generally speaking. Increasing compression ratio by reducing trapped volume and re-shape cylinder top may give you a beast to tame. This activity is for people with special knowledge. Timing will also play a major role in this, low timing gives a torky engine, high timimig gives you a reving engine. But we are now at a certain distance from a friendly everybody's engine.
By increasing compression you may also get an engine that need redesign externally because of excessive heat. Total heat= compression heat + combustion heat.
I think MTK et al are doing the right ting by reporting a set-up that are for everybody that want a gasser.
Best regards
Yes exactly!!
Anyone who wishes to play with gasoline is best served to use the recipe we have developed.
Playing with machining of the head for more compression and so forth, may not for the everyday modeller. As far as I am concerned you would be on your own and please, if you break the engine doing special mods, don't cry to Todd about it. I can appreciate changing sensor positioning a little if you know whch direction to change it, but that might be all an average fellow may want to try
Reading back on some of the findings I have made and reported herein, a couple things might be considered a little over the top and not for the average modeller. I am going to stop posting such types on this thread. My apologies to the group in advance
Having flown the engine a bunch of times now in pretty warm to almost hot and humid weather I can say with certainty that the engine is extremely strong in all weather conditions. I'd say the output is ever so slightly lower under the 90F temperatures this past weekend, but not enough of difference to see a difference in the flying. It is at least on par with glow engines of similar displacement in the amount of power drop in hot weather. It is also extremely user friendly in hot weather just as it is in colder.
I am more convinced than ever this was an extremely worthwhile experiment and time very well spent. I am pleased that I made the transition from glow