Gas engine tuning for newbies....

[Slam]

Hi rcmergler

I used to race in a British formula called TKM a 100cc direct drive class and now race in Easykart 125cc direct drive with 28bhp. They are great fun, getting near 100 mph on some circuits.

Cheers for that Ed i will try it this weekend. Last night i made some guides in the cowl so it's possible to adjust the carb with the cowl on. i'll remove them when it's set up and cover the 2 small holes with a bit of vinyl.

Cheers

Duncan

[rcmergler]

	Quote: Originally Posted by mikeh
	I will give this trick a try. I have nothing to loose. Thanks for the tip. mikeh

Let me know how it wooks out for you... i have done the carb trick on both of my 50 and 150 and so far it wooks great.

[mogley]

Hello, I'm running a g62 with a toni clark muffler, stock ignition. I finally got it to run. The high end ist at 3/4 and low end is at 1 1/4 turns out. When adding thorttle, there is alot of hesitation. I get no burbble anywhere like I get on my DA 50 w/slimline. The g62 is very quiet with this setup. While choking, fuel comes out of the carb (probaly out of a gasket). This motor is brand new (although in box for 5 years.)

Is it normal for the high end to be only open 3/4 of a turn.

thanks for any help

[Al Lewis]

If you've run the line into the fuse and are still having a problem then terminate the line in a pill bottle or film canister. Just drill a hole in the lid so the line fits in loosely. Make sure it is not air tight. Works like a champ and guarantee's no turbulence.

[mfuess]

	Quote: Originally Posted by mogley
	Hello, I'm running a g62 with a toni clark muffler, stock ignition. I finally got it to run. The high end ist at 3/4 and low end is at 1 1/4 turns out. When adding thorttle, there is alot of hesitation. I get no burbble anywhere like I get on my DA 50 w/slimline. The g62 is very quiet with this setup. While choking, fuel comes out of the carb (probaly out of a gasket). This motor is brand new (although in box for 5 years.) Is it normal for the high end to be only open 3/4 of a turn. thanks for any help

Not really OK. You need to balance both low & high needles. I'd open up the HIGH and close the LOW a bit...

[mogley]

did some more tuning on the g62, high end is still at 3/4 and a tad more open. Here I get max rpm of 6300 turning a zinger 22x10. Where can I buy a needle setting gauge? Low end is now set a littler leaner and I'm also getting a good transition. It just loads up a bit when idling for a bit and I have to add throttle slowly. After it is spooled up once, acceleration is perfect again. It will also hold the peak rpm. I was hoping for higher rpms. Will a Mezlik 24x10 be too much (this is the next prop I want to try)?

[RTK]

With a non restrictive muffler you should be at 7000 with that prop, I don't think it is your needles but your exhaust.

[BAS]

Yes every G - 62 i have owned has the high end around 3/4 turn out .

[mogley]

thanks for the help,

the 22 x 10 is a regular zinger, not the pro. The muffler should not be very restrictive that I'm running. They can be found at toni clark practical scale gmbh.Since the engine is new, I hope the RPM's will increase when I have run a few tanks threw the engine.

Will the Mejzlik 24 x10 be too much though. I am running the engine at sea level in florida, were it is currenlty extremely humid and hot.

[babsvdmerwe]

Hi my Name is Andre and somewhere in flying giant there is a picture posted of a timing degree chart and is unable to find again.
Babsvdmerwe

[JoeAirPort]

http://www.ch-ignitions.com/timing.html

The above is a link on the following web page:
http://www.ch-ignitions.com/CHinst.html

I used this to adjust my timing and it worked awesome. Just clip some music wire to the engine and use it as a pointer. Just make sure you don't bump it after you set it.

[babsvdmerwe]

Thanks Joe airport for the information
babsvdmerwe

[reyn3545]

I've read this thread from spinner to tailwheel (women's marathon is that boring!)...

I have a pretty new 3W170... about 2 gallons through it. It has a great high end, no burbling through the throttle range, but it shakes like crazy at idle. I've been hesitant to start cranking on the low idle, but it sounds like that's what I need to do. I'll give it a try tomorrow.

[babsvdmerwe]

Hi ,Andre again would like to know if altitude plays a role in the setting up of a gas engine concerning your low end needle.

[rcflyer]

	Quote: Originally Posted by reyn3545
	I have a pretty new 3W170... about 2 gallons through it. It has a great high end, no burbling through the throttle range, but it shakes like crazy at idle.

I'm seeing high vibration in my DA100 at idle too, after 5 gallons. Can this be remedies by adjusting the low end? Does the type of prop contribute to higher vib at idle too? Thanks