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RE: Nitro Guide and FAQs - 5/31/2007 4:45:07 AM   
IOWAREVO



Posts: 350
Joined: 3/28/2007
From: Council Bluffs, IA, USA
Status: offline 		Well, It seems to act flooded, so while starting I pinch the fuel line for a sec then release. Then I found that I could do the same thing by holding the fuel tank cap open a crack while I turned the engine over. Lean all over.....never would had thought...plenty of smoke both fast and low runs. couple of drips out of tailpipe...normal I figure. temp 240 -260

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RE: Nitro Guide and FAQs - 5/31/2007 5:57:01 AM   
hpi apollo



Posts: 2639
Joined: 5/13/2006
From: Georgetown, KY, USA
Status: offline 		sounds like its lean to mea but you mention dripping from the stinger....you could have a slight air leak


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RE: Nitro Guide and FAQs - 5/31/2007 2:54:08 PM   
iexion


 

Posts: 752
Joined: 8/1/2006
From: Sioux Falls, SD, USA
Status: offline 		Yeah if the exhaust is leaking any bit of air, its gonna make tuning a **** to do. When i had my tmaxx i spent 3 tanks trying to figure out why its not tuning and when i finnallyy looked at the exhaust "cuppler" (silicone cover around the exhauast) it was cracked.

...... it was either the Tmaxx or the TZ engine i had i had this problem with

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RE: Nitro Guide and FAQs - 6/2/2007 5:09:26 AM   
send4jimmy


 

Posts: 4
Joined: 6/2/2007
From: La Verne, CA, USA
Status: offline 		I was told I need to take my car in after I break it in so they can do an advanced tune up. I'm pretty smart when it comes to working on things so I was wondering what exactly they are going to do? Is it as simpleas adjusting the needles or do they do something else? Is this easy enough for me to do on my own at home? My motor is an OFNA force .28(pull start)

Thanks

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RE: Nitro Guide and FAQs - 6/2/2007 5:27:08 AM   
iexion


 

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From: Sioux Falls, SD, USA
Status: offline 		well if they are going to " fine tune " its then its couldnt hurt (as long as its free) but really all you have to do now is just lean things out, and t hen find where you needs to richen it a little. so the first thing you need to do is lean the HSN to the point where you can snap off the line. Then tune (richen or lean) the LSN in which you may need to adjust the HSN a bit.

THEN once you can go full throttle you need to adjust the idle.

What i do when i think it's tune correctly stop the engine by cutting off the fuel to see what the engine does. If it stops really quick then the LSN is too lean. And if it REVS up alot then dies, the LSN is too rich. When you cut off the fuel, the engine should rev for about 3-4 seconds then die. And it shouldnt rev up alot but just a little then die.

And If its to hard to start up then the HSN may be set too rich.... but im sure we all already know this

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RE: Nitro Guide and FAQs - 6/2/2007 6:11:17 AM   
hpi apollo



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From: Georgetown, KY, USA
Status: offline 		send4jimmy, during break in you should be tuning the engine, when you take it into them for tuning ask them to show you how so you can understand, i did the best i could writing an article for it but practicing with someone can be easier


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RE: Nitro Guide and FAQs - 6/2/2007 7:29:56 AM   
send4jimmy


 

Posts: 4
Joined: 6/2/2007
From: La Verne, CA, USA
Status: offline 		I understand the tuning process of the LSN, HSN, and Idle. I told them that and they said "Oh no, the first tune is a really advanced tune and must be done in the shop, then you can tune yourself after that." So I asked if it was any different than the process explained in the manual or on the forums and he said yeah. I thought maybe he was going to do some really special tune?? If he is just going to turn my needles till that baby hits the sweet spot then I'd rather do it myself and gain the knowledge. You never learn if ya dont try right? But if there is a more advanced knowledge needed for the first tune than I have no problem taking it in so I get the most of my new car. Hope I made sense, Ha ha. What do you all think?

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RE: Nitro Guide and FAQs - 6/2/2007 7:42:30 AM   
send4jimmy


 

Posts: 4
Joined: 6/2/2007
From: La Verne, CA, USA
Status: offline 		Oh yeah, I forgot to ask about a button on my factory remote on my OFNA Ultra LX Comp. It says TH-REV and my options are N & R. It also has the same switch for SERVO. Can anyone tell me what the N and the R represent? And which one should I use?

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RE: Nitro Guide and FAQs - 6/2/2007 7:43:45 AM   
hpi apollo



Posts: 2639
Joined: 5/13/2006
From: Georgetown, KY, USA
Status: offline 		a tune is a tune, the first one isnt special, but it is important to tune your engine correctly at break in, basically just keep it to where its taking off smoothly and not drowning in itself, all they are going to do is tune it and then give it back, might as well do it yourself as practice


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RE: Nitro Guide and FAQs - 6/2/2007 8:51:57 AM   
iexion


 

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Joined: 8/1/2006
From: Sioux Falls, SD, USA
Status: offline 		well im sure they will also try to sell you something while your there so they can say " OH you cant tune without this"

One of the MAIN things i should of posted a trend on is how hobby shops are. Not saying any hobby stores are bad in any ways or sence but......

*** You have to be careful at hobby stores because they might be trying to help you but they still are sells people and they WILL try to sell you thing you my not need or thing that u can live without ***

also, look up info before you purchase anything over $40... maybe over $30

At my LHS i've found that no one there really knows how to tune a engine correctly. even the guy who only works in the rc section doesnt know how to tune correctly.

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RE: Nitro Guide and FAQs - 6/2/2007 3:32:27 PM   
Mountn


 

Posts: 6
Joined: 5/15/2007
From: Angel Fire, NM, USA
Status: offline 		Howdy all. Incredible amount of good info here...thank you. I have question about running nitros at high altitude. I live at 8500 feet and I bash....no tracks or clubs near me...I'm lookin to buy a nitro but have heard they can have a lot of trouble running at this altitude.....It seems to me I can breath and drive my car the things oughta run....but since anything I know about nitros I learned here pretty much, I figure you're the ones to ask. Thanks again.

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RE: Nitro Guide and FAQs - 6/2/2007 8:44:38 PM   
hpi apollo



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Joined: 5/13/2006
From: Georgetown, KY, USA
Status: offline 		well there is a little graphic on the first page of how to adjust to altitudes and pressure differences, higher altitudes mean you should run a little leaner, also, i beleive the general rule of thumb is that for every 1,000ft above sea level engines lose 3-4% maximum power so you're running on about 2/3 the power, higher nitro fuel would probably help a bit


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RE: Nitro Guide and FAQs - 6/3/2007 12:23:11 AM   
Mountn


 

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Joined: 5/15/2007
From: Angel Fire, NM, USA
Status: offline
quote:

ORIGINAL: hpi apollo

well there is a little graphic on the first page of how to adjust to altitudes and pressure differences, higher altitudes mean you should run a little leaner, also, i beleive the general rule of thumb is that for every 1,000ft above sea level engines lose 3-4% maximum power so you're running on about 2/3 the power, higher nitro fuel would probably help a bit


Many thanx. running it lean at this altitude and higher....just curious what kind of life span it might have....and how futile it may be to try to run in snow...fuel with sythetic oil? i have sheet metal shop.....have a few ideas for water protection for the electronics...seems like a challenge anyway......i've learned a lot reading this....thanx again!

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RE: Nitro Guide and FAQs - 6/3/2007 12:36:08 AM   
send4jimmy


 

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Joined: 6/2/2007
From: La Verne, CA, USA
Status: offline 		So I'm still trying to do my tune now that my break in is done. I am told that on my .28 motor I should not have the main needle and more than 2-1/2 turns from fully turned in. They reccommend 3 turns out and no leaner than 2-1/2 from closed. But I'm at 2-1/4 turns from fully closed and it still spits fuel out the pipe and boggs out and dies uppon take off. Any suggestions? I have my low end needle at stock setting and have tried turning it 1/2 turn both ways but no improvement.

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