TOO HOTT!
10-05-2011, 06:06 PM
#1
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TOO HOTT!
So I broke in my new Revo 3.3 yesterday (pretty well I believe) and tuned it today on pavement (pretty well I beleive)... went to do some bashing tonight at a local park, on grass mostly, and overheated the HECK out of the engine: about 360 degrees!!! The engine was smoking a little...OPPS!
I cant get the thing to cool down when running. I dont have holes cut in the body's windshield yet and I even richened it so rich that is was sluggish while going a complete stop. Plenty of blue smoke and nitro from the tail pipe.
Any suggestions to cool this sucker down?
10-05-2011, 06:49 PM
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RE: TOO HOTT!
Running on grass really makes a huge temp increase. Can't remember my exact numbers, but got somewhere around 280degF on grass, and with the same tune, got about 220degF on pavement.
Suggest you richen your HSN about 1/4 turn or so and see what happens. It's OK to run hotter because you're on grass (oops, that doesn't sound good), but I try to keep the temp below 300degF as the engine can experience detonation if allowed to go to high. I had one engine that would detonate around 320degF.
Suggest you richen your HSN about 1/4 turn or so and see what happens. It's OK to run hotter because you're on grass (oops, that doesn't sound good), but I try to keep the temp below 300degF as the engine can experience detonation if allowed to go to high. I had one engine that would detonate around 320degF.
10-05-2011, 08:22 PM
#3
RE: TOO HOTT!
Cut some holes in the body!!
That poor little engine had hardly any air cooling it off. Let it breathe!
You should limit the hard grass runs until the engine breaks in more. It usually takes a gallon or more to fully break in. Most of your average throttling is 3/4 or less, which the low speed mixure controls. Richen your low end a tad and cut some holes in the body.
The main needle only controls fuel mixture at 3/4 to wot. Also, at 350 degrees, the engine case expands enough for the outer race of the bearings to come loose, so hopefully it wasn't truly that hot or you may have other problems down the road.
That poor little engine had hardly any air cooling it off. Let it breathe!
You should limit the hard grass runs until the engine breaks in more. It usually takes a gallon or more to fully break in. Most of your average throttling is 3/4 or less, which the low speed mixure controls. Richen your low end a tad and cut some holes in the body.
The main needle only controls fuel mixture at 3/4 to wot. Also, at 350 degrees, the engine case expands enough for the outer race of the bearings to come loose, so hopefully it wasn't truly that hot or you may have other problems down the road.
