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Old 09-13-2009, 06:11 PM   #1
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Default Smoke Coming out after corner

If there doesnt seem to be enough smoke coming out thru a corner which is a big thing to have, should i adjust the low or high speed. Im guessing the low speed. And should i richen it or lean it out to create more smoke. Im pretty sure i should richen it but then does that mean i have to adjust the high speed once i do that?
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Old 09-13-2009, 06:15 PM   #2
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when in doubt lean her out.

all kidding aside if the motor is making good power and still has some smoke and temps fine leave it alone.
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Old 09-13-2009, 06:20 PM   #3
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With a name like that, I would listen to him

Smoke depends a lot on the fuel. Fuels with lots of castor will smoke more than a low oil content, mostly synthetic blend.
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Old 09-13-2009, 06:37 PM   #4
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Well after running a couple laps it was at 240. So if there is no smoke out of corners i shoud lean the low speed?
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Old 09-13-2009, 06:39 PM   #5
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leaning any of the needles will reduce smoke.
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Old 09-13-2009, 06:40 PM   #6
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Quote:
Originally Posted by unsp0ken View Post
leaning any of the needles will reduce smoke.
it was a joke richen the hsn 1 hour to 2 hours.
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Old 09-13-2009, 06:41 PM   #7
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Rich = More Smoke, Cooler Temps
Lean = Less Smoke, Higher Temps

I would richen the HSN by 1-2 hours and see how it reacts to start. Every engine/tune is a bit different. The HSN controls overall fuel delivery to the engine though. The LSN only controls fuel delivery at idle to maybe 1/2 throttle or so.

Either way....you need to richen something if you wanna see more smoke ;-)
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Old 09-13-2009, 06:48 PM   #8
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Ok thanks
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Old 09-13-2009, 06:49 PM   #9
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I just figured since you were coming out of the corner at LOW SPEEDS you would be adjusting the low speed needle. I know the the richer it is the more smoke
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Old 09-13-2009, 06:53 PM   #10
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Don't tune by smoke. After a 5min run, what are your temps like? By the way what engine are we talking about, some engine run better at higher temps. What brand fuel and is it 20 or 30%?
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Old 09-13-2009, 06:57 PM   #11
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Low speed needle is really a bad name for it. It should really be called an Idle Mixture adjustment. Speed doesn't really matter. The moment you open the throttle, the needle pulls out of the seat for the LSN and now the fuel is only restricted by the HSN.
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Old 09-13-2009, 06:59 PM   #12
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Quote:
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Low speed needle is really a bad name for it. It should really be called an Idle Mixture adjustment. Speed doesn't really matter. The moment you open the throttle, the needle pulls out of the seat for the LSN and now the fuel is only restricted by the HSN.
very true and 240 is a perfect temp for any motor
i think he has a v spec btw!
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Old 09-13-2009, 07:09 PM   #13
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Yes i Have a v spec. Came off at 240 and i believe it was longer than 5 minutes. And im running byrons 20% fuel. So does it seem good like it is?
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Old 09-13-2009, 07:11 PM   #14
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Thats fine.
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Old 09-13-2009, 07:21 PM   #15
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Yeah the LSN only has an effect on the mixture until the needle on your carb slide comes all the way out of the slot it's seated in. Once it's out...HSN is doing ALL the work for mixture. Some carbs the needle is fully out by 1/4 throttle...others...1/2 throttle. Just pull your air filter off, turn on your rig....and operate your throttle and make a mental note of when the needle pulls completely out of it's sheeth. When it's out....any throttle position LESS than that is the LSN kicking in....anything MORE is the HSN.

More guys mis-tune their low speed though.....
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