Firestorm Tuning Problem - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-15-2011, 08:11 PM   #1
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Nitro Firestorm Tuning Problem

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I'm having an issue tuning my firestorm. I broke it in by running it at factory settings for 6 tanks. I never hit full throttle until the last tank, starting at idle for the first, then gradually increasing the throttle throughout the six tanks.

Today I figured it would be good to start tuning, but its weird because when I lean out the HSN by 1/8 turn, it runs much better at low RPMs, but if I give it full throttle, it revs up and then bogs down and dies.

I tried turning it another 1/8 and now it can do wheelies when I give it full throttle but it seems to bog down sooner.

Reading the manual, it says not to turn it past 1/4 turn, but there is still a lot of fuel coming out of the exhaust because its all over the tip of the pipe and the side of the body.

Is this normal behavior for an engine running too rich? It seemed to run better at factory settings at high RPMs, so it seems weird to me but I don't know anything about this lol.
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Old 07-17-2011, 11:23 AM   #2
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Smile Re: Firestorm Tuning Problem

I have mine tuned like this. My LSN is flush and The High SN is one turn in from flush. Be careful not to run too lean . Mine was set real well "I thought" smoke trail and all but it still sent a rod through the case. My replacement 3.0 is on the bench, while the FS now runs with a .12 engine. It runs just as fast but no wheelies
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Old 07-17-2011, 01:21 PM   #3
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Re: Firestorm Tuning Problem

Try adjusting the high speed needle until you get the best possible idle. Then very slowly, just 1/16th to 1/8 of a turn, turn in the low speed needle and if it is running rich you should hear the RPM start to pick up. Continue turning in slowly until you reach peak RPM. that is, until any further turning of the LSN does NOT result in any further RPM increase. Then turn back just slightly!

Go back and just slightly tweek the High speed needle until it idles smoothly and then turn back 1/8 turn to assure it is not going to be running too lean.

Give this a try and see if it helps. I find that it is the low speed needle that needs tweaking for good throttle transition. I am not too familiar with car engines but I do have 2 stroke airplane engines and would think 2 stroke car engines can be adjusted basically the same. Hope this helps.
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Old 07-17-2011, 08:40 PM   #4
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Re: Firestorm Tuning Problem

Thanks for the tips guys. I'm going to try and get out sometime this week after work and try it out. I'll let you know how it goes
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