Hmmm ... Up until very recently, I had an RV-8 with a parallel valve IO-360 that had 10:1 pistons installed by LyCon when the engine was brand new. That engine has 1940 Tach hours on it now and is still going strong. Never had a cylinder off or any other major work done to it.
Although TBO doesn't mean much for Experimental airplanes, can you provide a reference for your statement that "... it also shortens the TBO from 2000hrs to 1000hrs."?
Van's numbers on their site are slightly skewed because they publish the numbers for the IO-360 on the -14 as instead of the -14A. Having the nose gear eliminated helps improve performance a bit, almost making up for the 10hp difference, making the IO-360 looks faster. It's not, it's the missing nosegear. Apples to Apples on the equivalent air frame, you climb faster and will be able to go faster with the IO-390. However I don't think that really the reason to choose the IO-390.
My RV-14A runs fantastic on the IO-390. My CHTs run between 300 - 315 (IO-390 has excellent cooling). Mid 300's on extended VY climbs. I loiter around at 55% - 150kts TAS burning 7.5 gph. The price of the IO-390 and Angle Valve IO-360 are about the same. The angle valve will run hotter (possibly less longevity) and not climb as well for very little savings in money. You can't go wrong with the IO-390 on the -14/A
Is anyone considering mounting a I0360 on your RV 14?
I was told that a 360 could be increased to 200-210 HP I do not know the truth.
I know about 200 hp 360's but what would a 10HP decrease do to the performance. Is it worth considering?
Any thoughts
Scott,
I know you don't usually deal in "what-if's", but can you indulge me this one time?
How much longer would the engine mount for the -14 need to be to put the CG where it would work for the parallel valve (I)O-360 and what would you expect the performance hit to be?
...
The difference that would be more directly noticeable would be take-off and climb performance.
I was told that a 360 could be increased to 200-210 HP I do not know the truth. I know about 200 hp 360's but what would a 10HP decrease do to the performance.
The price of the IO-390 and Angle Valve IO-360 are about the same. The angle valve will run hotter (possibly less longevity) and not climb as well for very little savings in money.