ENO

My Feedback: (2)

I was just wondering if there is any draw backs to using 20/30 Cool Power vs. Cool Power 30% Heli. on a YS 160/170 DZ?
Would think the 20/30 would cut down on the smoke trail but I wouldn't want to switch if the YS motors run better with the extra oil from the 30% Heli. I haven't really seen any YS 160s DZ run on 20/30 Cool power.....

Doc

vbortone

My Feedback: (2)

From YS 170 DZ instructions:

Nitro 15-30%
Oil 20-24%
Synthetic oil only. Castor no more than 2%.

I will assume that the Cool Power 30% meets those specifications. I am not sure about the 20/30 Cool Power. I will say that is OK since you have 20% oil. Is this correct? I am sure that Troy can help you in this regard.

Vicente "Vince" Bortone

riot3d

I've been running the Cool Power 30% heli for the past two years on my 160/170 with great success. Only disadvantage, heavy smoke trail.

I talked to QQ at the WC briefly and again at length this past weekend at the AMA show about their low smoke version - 30% nitro and 20% oil, he advised me that he has been running that particular blend for quite some time with good results. You do need to re-adjust the needle valve - richen it from 1/4 to 1/2 turn. I will try it after finishing my last few cases of 30% heli.

Adrian

apereira

I have tried both fuels on my DZ160, the are both good, just need to richen the pump wth the PowerMaster about 1/16 turn, the transition is very smooth on both,normally people switch fuel with no adjustment to the pump and cause tansition problems.

Again my engines runs perfect with both fuels.

Good luck

jaycey

My understanding of the use of Coolpower Heli 30% is that it contains a low viscosity oil that is more suitable for DZ engines because of their high compression.

Fuels with higher viscosity oil cause faster wear on the engine.
Jason

mwick

The Cool Power 30% that QQ and others are using is called 30%LS. It is a heli fuel that contains 20% low viscosity oil. It does require richening the pump and leaning the HS as compared to the 23% oil content. I believe the low vis oil is important in the DZ engines.

Robbidos

My Feedback: (20)

Actually, according to Morgan's site, the LS (Low Smoke) is a high viscosity oil. I purchase a case by mistake. Troy switched with me and will be testing it in one of his planes to see how it performs in the YS's.

ENO

My Feedback: (2)

That is what I'm concerned about. If you look at Morgan Fuels website it states that the 30%LS is "Ultra High Viscosity" while 30% Heli is "Low vicosity". I'm sure they both run well initially, but what I'm concerned about is the wear and tear to the motor with the LS vs. the regular 30% Heli. I have used the 30% Heli with good success but was wondering if it would be worth switching to the LS to cut down on the smoke trail. It wouldn't be worth it if it creates motor problems down the line. I have used other brand fuels claiming to be for YS DZs but have seen alot of engine tear problems. The viscosity issue is my concern with the YS 160/170 DZ.....just wondering before I purchase fuel this season.

Thanks for your inputs so far,

Doc

billtulsa

Doc,
I ran the 30% LS fuel in my 170's all last year with no problems. If you were to run a high viscosity oil fuel and compare it to a low viscosity oil fuel of the same percentage, the higher viscosity oil fuel will smoke less. I did not have any issues with the 30LS at all.
Both QQ and I worked with reduced oil content fuels after the nats last summer and we both agree that 20% is where you need to be on the oil. I have the parts to prove it, use 20% oil.

Bill Cunningham,

byoung466

My Feedback: (16)

I have ran many gallons of the Powermaster DZ Blend, CP Heli 30%, and last summer the CP LS30%. Engine ran well on all, several hundred flights on the engines before I had to do any work on them. And then I didnt see any wear related to lack of lube. Im not real sure how much time to put on the YS's before doing a ring or bearings, so I run until they lose power or malfunction which for me has been awhile.

The LS definately doesnt smoke as much as the heli blends.

Troy Newman

I'll agree that the LS seems to run fine. I don't have tons of time with this fuel, but I have run it a little. It requires different mixture settings....The smoke is a little less. I have not run lots through it to determine if its doing as good of job as the LV oil, but it seems to be working fine. The real test is in PHX in the summer at over 100degs. I think when its really hot and humid out the LV might be the better choice.

Right now the cooler winter temps the LS seems to be running very well. I know Bill used it and Quique as well after the NATS. I think its probably good to go. I'm not going to dump my LV oil just yet but I'm running the LS and we'll see what it ends up with.

The smoke is reduced but its not a huge reduction, I would say its about 50-60% of the smoke it was before. The real test is on one of those clear blue sky days with cooler temps and really dry air. Then you be able to tell.



Troy Newman

swlarcham

My Feedback: (1)

Troy
WIth my limited knowledge of organic chemist ,physics and almost complete lack of knowledge of IC engines I have to preface this question with a "I have no idea" BUT
I thought the low viscosity oil was so it could reach all parts of the DZ engines, via blow by or something.
If that's the case I would think the cooler temperatures would be the real test as the oil would be thicker and the warmer the ambient temp the beter the oil would flow. If that were true the 100degs in Phoenix should give the best flow therefore cooling.
Just a thought
Eddie

byoung466

My Feedback: (16)

Where did the low viscosity recomendation come from anyway;(my recollection is this was the consensus of the top users)? As Vince mentions above the operators manual says nothing about oil viscosity, recomends ys 20/20 of good quality and less than 2% castor.

I dont know how you could quantify two similar oils wear characteristics unless you are willing to run two engines side by side and tear down at intervals. To many variables otherwise.

snap_roll

Am using a standard 20% heli fuel by cool power. whatcha guys think of this choice?
Just hope i can keep my DZ160 and 140 running as long as possible.