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Old 05-11-2010, 08:00 PM   #16
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CJ knows more about tuning engines than he is letting on.

oh i see, i dont know if you guys seen, this but there is a website that sells these things that tell you, where you tune your high end at. and how many turns you turned the needle, im serouisly thinking about getting one too.
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Old 05-11-2010, 08:02 PM   #17
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oh i see, i dont know if you guys seen, this but there is a website that sells these things that tell you, where you tune your high end at. and how many turns you turned the needle, im serouisly thinking about getting one too.
Link?
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Old 05-11-2010, 08:04 PM   #18
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oh i see, i dont know if you guys seen, this but there is a website that sells these things that tell you, where you tune your high end at. and how many turns you turned the needle, im serouisly thinking about getting one too.
I don't buy it. No device can race tune an engine for you. That is an art you have to master. It will take time, but once you get enough experience with it, it is pretty simple(for the most part. There are the occasional WTF moments.).
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Old 05-11-2010, 08:06 PM   #19
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Link?


www.R/C Hardware.com
its on beatyourtruck.com its on the reviews on their site.


sorry its www.rchardware.com

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Old 05-11-2010, 08:08 PM   #20
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There are many ways to tune a nitro engine but I figure this is the most simple way to do it. This technique is for a fully broken in engine that is ready for a full performance tune. This tuning procedure will set your needles to where they need to be for optimum performance, the engine will tell you all you need to know.

For this method to work the engine has to be at running temperature (or as close to it as possible) as well as having the standard 1mm gap for the carburetor opening.
High Speed Needle

Pull a full throttle pass a couple of times and listen to what the engine does when you let off the throttle. If the it drops right to idle, the HSN is either good or on the rich side. At this point you can lean the HSN in 1/12 turn increments until the idle seems to hang a little after a full throttle pass. If it starts to idle high after a pass it is just on the lean side of a perfect tune. Back the HSN out 1/12 turn at a time after a wot pass until the engine drops right to idle after a pass. Now your HSN is set.

An explanation to what is happening is simple - if your HSN is too lean, after a full throttle pass when you let off the throttle the engine is still lean causing the idle to hang and idle high until the LSN has a chance to take over and meter the right amount of fuel to bring the idle down to normal running speed (given the LSN is set correctly).

If the opposite happens, after a full throttle pass when you let off the throttle it drops to a good idle right away and then starts to idle back up too high, this is a sign that the LSN is too lean. If it comes off full throttle with a good tune and will drop RPM nicely then the HSN is metering the fuel properly but once it hits idle the LSN being too lean will quickly take over causing the RPM to go back up.
Low Speed Needle

Most of this setting was explained above but there are a few little tricks you can use to make sure the LSN is adjusted perfectly. We all know that you don't tune for temperatures, but a temperature gun is very handy for this part. After some full throttle passes with the engine good and warm, bring it in and let it sit for about 10 seconds. At this point take your temperature gauge and hold it as steady as possible on the head, what you want to see is the temp dropping a degree every 4-5 seconds. You want the temp to drop very slightly at idle because when your off throttle the engine should be cooling, if not, the temps will keep pushing higher during on and off throttle running and will cause temperature issues.

This is how I do it and I have tuned a lot of engines for people, whether bashing or racing. I have seen across the board from beginners to veterans that when they hear the high idle after a pull, the first thing they go for is the LSN when in fact it is the HSN causing the issue.

I use this method for all my engines and it works. I am pulling OS Speed's everywhere on the track with my $225 Jammin 21.
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Old 05-11-2010, 08:09 PM   #21
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I don't buy it. No device can race tune an engine for you. That is an art you have to master. It will take time, but once you get enough experience with it, it is pretty simple(for the most part. There are the occasional WTF moments.).


i get what your saying but this thing, reminds you where you have your high end tuned at its good for, guys learning like me still. but i do tune for performance and smoke not temp. usally if theres smoke coming out of pipe than you should be ok.
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Old 05-11-2010, 08:21 PM   #22
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I am just waiting for the little ecu and fuel injection kit to bolt on and solve all my tuning problems forever.
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Old 05-11-2010, 08:24 PM   #23
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I am just waiting for the little ecu and fuel injection kit to bolt on and solve all my tuning problems forever.
I wouldn't hold your breath on that one.
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Old 05-11-2010, 08:31 PM   #24
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I am just waiting for the little ecu and fuel injection kit to bolt on and solve all my tuning problems forever.


be carefull what you wish for on that , more cost $$$ and i think it would be more of a pain cause theres more things to go wrong.
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Old 05-11-2010, 08:51 PM   #25
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Starting to turn blue here. Is it here yet???
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Old 05-11-2010, 09:01 PM   #26
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Starting to turn blue here. Is it here yet???
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Old 05-11-2010, 09:04 PM   #27
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I am just waiting for the little ecu and fuel injection kit to bolt on and solve all my tuning problems forever.
a 2,000$ unit for your 300$ engine classic


sooner or later though , i am sure it will happen
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Old 05-11-2010, 09:09 PM   #28
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a 2,000$ unit for your 300$ engine classic


sooner or later though , i am sure it will happen
Ahhhhhhh I can breathe again. Whewwww I aS turning purple. Thanks Monty. So where do I get one or better yet two?? Jk
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Old 05-11-2010, 09:11 PM   #29
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a 2,000$ unit for your 300$ engine classic


sooner or later though , i am sure it will happen
I would bet for $2000 Monty will come and tune your engine for you..?
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Old 05-11-2010, 09:11 PM   #30
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I am just waiting for the little ecu and fuel injection kit to bolt on and solve all my tuning problems forever.
Rc DFI would be dialed.......


Ill hold my breath tooo
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