Four Stroker

On the YS Japan website there is a DZ 70 listed several times. No manual listed. Is this a direct injection 70 that is coming ? Is this for some pattern event in Japan that we do not have ?

Hooligan67

I contacted YS and they confirmed this is a new engine about to be released in the market. http://www.probuild-uk.co.uk/ are taking preorders on this engine. I have preordered one for myself. Probuild expect the engine to arrive by march/april 2013.

Eduardobesky

My Feedback: (1)

Here you can see in stock but is less cheaper than the other store...
http://www.rcworld.com.au/motors/glo...le-engine.html
Regards! Eduardo

MrShoes

My Feedback: (15)

Has anyone bought or run this engine yet? Any field reports on it?

josephcraig

I just received the DZ 70,have yet tofire the engine.The guys at central hobbies are saying the fz 70 might be discontinued..

MrShoes

My Feedback: (15)

Does your owner's manual say to use 5% -25% oil? I spoke with YS (distributor) today and they were not aware/didn't believe this engine should be on run low oil content fuel. But the manual I have says 5% - 25% oil.

josephcraig

i have been using coolpower 15% in a ys53 that i bought used..seems to do fine with no problems.thats all i run is 15% in all my planes..

josephcraig

to correct myself on last quote.thats 15% nitro,17% oil.....

MrShoes

My Feedback: (15)

On the DZ70, the manual says 5% - 25% oil and 10% - 30% nitro. There is a CDI version of the DZ70 currently being sold overseas. I wonder if the engine is built to use low oil content fuel. Here is the manual from the YS website,

http://www.yspower.co.jp/en/data/pdf/dz70.pdf

josephcraig

i think the only advantage of the ignition would be for predetonation.don't know if there is a power gain.what you think?have you tried glow with ignition before?

josephcraig

if you feel uncomfortable about running low oil,by all means run the higher percentage.synthetic oil is pretty much proven with less oil..you can always add a little oil also..

josephcraig

Have you tried the dz70 in the air..if so how did you like it?

josephcraig

Oh I finally tried out my ys dz70 on 30% heli fuel.It's a rocket.One note,manual says 2 rounds on high side on initial start up.Way too rich.1 1/4 is good.Strongest engine I have ever run this size.You will not be disappointed.Throttle response instant power.

kenh3497

All the thoughts below pertain to using glow fuel.

Spark ignition should give a power increase and decrease in fuel usage. Ignition timing should be set to about 35 degrees BTDC. Spark ignition will always occur at that point (35 BTDC) unlike glow that varies quite a bit. Because of this precise control of the ignition a slight leaning of the fuel mixture is OK without fear of pre-detonation. IMO, if you have the extra dollars to spend and can stand the weight gain of the CDI box then spark ignition is a no brainer.

Ken

EDIT: An increase in compression ratio is also possible to further increase power output.

josephcraig

Yea,
I have been really interested in the evo gas engines.since they have come out with pump carbs,I fixin to try the 15cc out once I get it together.I had non pump carb last year and it was a pretty good engine.I'm anxious to see how pump carb works out.I think it should be more stable running engine and be lot more consistent.I traded my v1 15cc last year to a flyer.Missed it since.It's gonna be on 60" plane,hopefully not too heavy.

MrShoes

My Feedback: (15)

What prop and kind of rpm's are you getting? Thanks

josephcraig

It's on escapade mx 40....13 x 8....11000 plus on ground...i find the xoar plastic blades to be really good..i never have really liked apc blades..

MrShoes

My Feedback: (15)

Is this with 20/20 fuel? Also, notice any problems with engine cooling or exess heat? Thanks for the response.

josephcraig

I have easier access to 30 percent heli fuel.20/20 would be fine i'm sure.Heating issues hasn't really been problem,probably cause the plane I have it on.Gets plenty of air.I did have one problem I think it was mainly my fault having it under propped,cylinder bolts come loose.Other than that,pretty good engine.If i had to do again,I would recommend buying fz70,this one is not too great on fuel with injection.If you not worried about fuel consumption,go for it.I'm sure it would be really sweet with 14" blade,I just don't have clearance for it.