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HomeAircraftHelicopterGasser Model RC HelicoptersOther › question about zenoah engine
04-11-2010 08:10 PM  8 years agoPost 1
edisoname

rrNovice

toronto

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engine is a Zenoah 27cc ESP modified,
it says to run at 32:1 (says in the manuel)

but people are saying 64:1 here?

just after breakin, been runing at 30:1, H needle is at 1 1/8
is it time to change ? will i notice a difference?

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04-11-2010 09:35 PM  8 years agoPost 2
dre4473

rrApprentice

Clarksburg WVa

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engine change!
It depends on the oil you want to run as to how to set it up on your carb.I run KLOTS in my g23 and its in a 1005 MA gasser and running at 40:1..no over heating and no smoke either..Power out the wazoo!

Donald R. Edwards JR Fly it like you stole it!!!

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04-11-2010 10:55 PM  8 years agoPost 3
edisoname

rrNovice

toronto

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Im using Castrol 2 stroke oil now

what do you mean by "how to set it up on your carb", lower oil content means richer on needles ? but needle setting should be colse for diff oil content right?

i did some search here, some people are running 64:1 with synthetic oil, but sam needle setting. confused now..

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04-12-2010 09:10 AM  8 years agoPost 4
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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Oil ratio
To keep a safety margin just run it at 35.1 with a good quality oil,needles where it runs best without being too lean.A regular plug nose check will help you determine this.I use a good quality chainsaw oil in my four gassers without problems.

Team- unbiased opinion.K.I.S.S principle upheld here

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04-12-2010 04:10 PM  8 years agoPost 5
Justin Stuart (RIP)

rrMaster

Plano, Texas

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People successfully run their $700 DA-50 airplane engines with 100:1 oil, but why risk it? 32:1 seems like a good compromise to me.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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04-12-2010 04:12 PM  8 years agoPost 6
edisoname

rrNovice

toronto

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i understand, but people are saying more oil content = more heat

so just wondering where is the balance

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04-12-2010 05:07 PM  8 years agoPost 7
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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The best person to ask is someone who has a lot of trouble free flying on Zenoahs
If you are a real confident person with gas motors,can read trouble signs early want the max from your motor it is probably safe to experiment,i see Chris Bergen recommends high oil content to his customers,probably as a safety margin for the average flyer.I expect a lot of the guys running very low oil content are very confident of their abilities or otherwise the suck it and see variety

Team- unbiased opinion.K.I.S.S principle upheld here

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04-13-2010 02:49 AM  8 years agoPost 8
jschenck

rrProfessor

La Vista, NE.

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I think the margin for tuning on an airplane engine is greater because of the better cooling there. With a heli the margin between good power and running hot is very slim. Personally I've been running ~3.4oz per gallon and getting good results. As I start to get more comfortable with my tune I may lower that to 3oz/gallon but no lower. Part of my issue is trying to get an exact measurement. the difference for 3.2oz (40:1) and 3.5oz with my measuring cup is hard to discern. If I really start flying more (which I hope to do) I'll start mixing 2 gallons at a time where I think I can get a more accurate and consistent mixture just due to volume - 6.8oz, down to 6.4 the 6.2 and if I'm feeling brave (and by then have lots more flights) try 6.0oz.

just bought a 2 gallon gas can to start down this road.

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04-13-2010 07:44 AM  8 years agoPost 9
pgkevet

rrKey Veteran

Wales

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I suppose I've got it easy .. easy access to 60ml syringes and measure what I want. They last a fair bit before getting sticky and throw away..

pgk

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04-13-2010 08:01 AM  8 years agoPost 10
Outback Jack

rrNovice

South Australia

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60ml syringes and measure what I want.
Yep! I use the same thing.
Bought them from my Vet last time I took my dog in.

The Vet wasn't phased a bit when I asked, just asked me if I raced GoKarts, they actually sell quite a few for folks that use them for mixing their fuel.

Nice folks at that clinic, the dog doesn't mind going there either.

Cheers,

Chris

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