Now you stay running

Yesterday I went out to the track to try to recreate my flame issues with the fuel gun.

Conditions were similar, but not exact. Air temp Sunday at Nationals was around 90, with a little humidity. Air temp yesterday was around 85, but not quite as humid.

The test was an hour run with stops every 8:30 with the same fuel gun as the nationals. My car was straight off the track, same everything. Engine temp at nationals was 230, and for the test it was 235.

Like I was unfortunately expecting, the engine didn’t even try to flame out one time. It didn’t even make any sound at all like it did during the Nats semi and final. It took the gun with no issues for the entire test. My home track is quite a bit smaller than the Nats track, so I’m not sure if that has anything to do with it.

My head is up a little higher now after the race. I did all I could do, I left nothing back and that’s all I can do. Now I’m just gonna try to club race more and do fuel gun stops more often when I’m at the track. Back to work and come back smarter and stronger at the next race. Sorry I wasn’t able to find the magic answer for all you guys having similar issues. Thanks for checking in and God Bless.

10 responses to “Now you stay running

  1. I think it has something to do with the speed of the fuel gun. Sometimes if you just grab the trigger as hard as you can, you’ll get that pinging idle once the fuel is in the tank and shortly after it’ll lean bog die. But if you pull the trigger semi-slowly usually you can sloppily get away with it. I think the speed of most fuel guns can be adjusted with the size and length of the vents. From my experience the Losi gun causes the most flameout issues. I’d try the old Proline fuel gun if you get the chance, as that doesn’t seem to be as fast as the Losi one.

  2. I am betting the size of the track had a lot to do with it. My guess is when you were pitting the tank was at a lower level, maybe about empty. Did you see how much fuel you had left at 8:30 during the test. Also when the tank was that low you had to run 46 seconds at that low fuel condition. That would lean out the engine due to lower fuel pressure, then whoosh, a full load of fuel in 1/2 second comes in.

  3. hi jared, had similar problems and it was the style of how the pit man works. tank absolutely full and the snapping the the tank cap hard will cause this. 2 mm less fuel and closing the tank not that hard will cure this. it´s just the pit man. give it a try. cheers

  4. If you hold the fuel gun tightly to the tank it will greatly increase the pressure leading to flame outs by basically pushing fuel into the carb flooding the engine. Some fuel guns have a relief to avoid this, some do not. You want to “drop” fuel into the tank not “push”. Just my $.02.

  5. Hey Jared,
    Loved the recent write-ups of your experiences at the gas nationals and had a project in mind and wanted to see if you’d be interested in working together with 2wdMod.com to hopefully connect the racers and fans together. Drop me and email at 2wdmod@gmail.com and we can discuss it further. Cheers buddy, Thomas.

  6. there is a discussion about this on RCtech.net under the engine section entitled “Jared Tebo’s Engine”.

    • Haha. Yeah I saw that. It is pretty funny to read through those posts. People sure love to have opinions. I like how people think I was pushing my runtime, which was not the case at all.

  7. before your Main, have you change the silicon hose from the muffler?after 2 or 3 race the hose start to expand due to heat from the muffler.sometimes this can cause flame out

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