Engine flamming out

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08-01-2011, 10:39 PM

#16

Frank L

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Quote:

Originally Posted by Jaz240

you'll be all serpent in 3 of them anyway

and a little light in the wallet on your way home

The nitro challenge always takes it's toll ok the wallet but this year it will be a little less thanks to you. Btw I prefer a single bill, real-estate is pretty high in this new fancy wallet. The wife gave it to me

08-04-2011, 07:23 PM

#17

Jaz240

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I'll take that also

08-05-2011, 01:40 PM

#18

j_blaze14

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Quote:

Originally Posted by SDelaney

Okay, so I was at a race this weekend in Florida and in each qualifer and then the mains my engine would flame out about 8 minutes into it. It seemed to be a heat issue, but I am not an engine expert.

The engine starts fine, idles like a champ and runs when I practice. However I am guessing because I usually practice at night that the tune/plug was not correct for the 95 degree day.

I am running a Nova 21 p4 with a 97T plug in it. For future reference what is the right plug to run on a HOT day and what adjustments do you typically make to your engine for these days, meaning fatten or richen the top or bottom?

Thanks guys

could be a short clunk in the tank, not reaching all the way to the back of the tank. could be lean tune, as tank empties tune leans a bit so try 1 or 2 hours richer on top. also because the clunk is not fully submerged in the fuel at the end of the tank it will pull in a little air at wot, leaning tune a bit also. 97t plugs are pretty good in all weather, similar to a p5, the 77t is more like a p4. if you are not confident with the plug i would try a 77t.

08-05-2011, 01:53 PM

#19

Cyberacer

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Quote:

Originally Posted by SDelaney

I just fought this exact problem with the same motor this past weekend. First off get a Nova 6. Then you will only need to change range if the temp drops below 50°F or goes above 100°F. I have found inconsistant tuning in the plus 4 with an ODO plug.

Second, check your motor for a bad rear bearing.

Lastly, check the fit of piston in your sleeve. My motor exhibited the same symptoms in the same type of conditions. I found that my piston/sleeve fit was too loose, and needed to be resized.