article by Don Nix.
A good read. Some interesting info. One more man's opinion.
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article by Don Nix.
Nothing to think about, one thing I've found(25+ yrs of working on cars and drag racing) is that ANYTHING that increases horsepower increases heat. If you are running cooler you are NOT using the same standards for tuning. More likely the engine is set up to be run on the 30% meaning it wasn't TUNED for the 20%, possibly the compression ratio or wrong glow plug. I would bet more on the glow because it not only ignites the fuel mixture but controls engine timing. Timing can have drastic effects on operating temps.
Here's you another article by Don Nix.
I will have to agree with you Rolex...as you said I had to LEAN my engine to keep my heat UP when I went from 20% to 30%. I like 30% good stuff....I have had jet fuel (Jp-8) on my dangling participle and that was not cool at all.
That was the most erratic article I have ever tried to read in my life.
Have you ever noticed how cold your hand gets if you spill nitro on it? That's due to rapid evaporation. Inside the engine, where it's mixing with air it has the same effect. The higher the nitro content, the faster the evaporation, so it tends to cool the engine more.
skydrol is much, much worse! Trust me I've had both!
Bro, I don't even want to know what you did to earn that honor....
Kidding aside, I would have to second Jetmechs' wisdom here. I don't have as many years under my belt as he does, but I have seen several engines blow up (broken connecting rods). Of course, the person that owned those engines would just grab any ol' fuel off the shelf, with the explanation that "fuel is fuel is fuel". I think I sold him 5 engines while working in the local hobby shop......
but everything I've read has stated that 30% will run cooler with more power, because the sleeve will expand more, hence less friction.
The reason it runs cooler is described above. Nothing to do with friction and why in the world would 30% cause the sleeve to expand more? And how would the sleeve expanding more not lead to a loss of power from reduced compression?
Run what you like, and make your own conclusions.
I thought my above post was clear enough. I'm not going to bite into any flamewars; so this will be my last post on this thread.
I stand by what I posted above.