YS DZ160s... OS-160 EFI

Thu Jan 22 05:15:04 AKST 2004

I hesitated to answer this question for several reasons. Power can be measured in several ways. The delivery of the power is greatly influenced by the prop selection and the fuel used. The power at full throttle is not really what we need. What we get in the mid range is more important to flying a smooth, constant speed pattern.

Taking on top end power first. I know you guys like lots of data, so my information comes form the following. All of my OS 1.60's used the long ES 1.40 pipe and Karl Mueller headers. The FX's (four of them) were run with perry pumps and then cline regulators. Two 1.60 FI's were also run in the same planes (Focus-1 and Temptation). Fuel was Powermaster 15/16.

Even though the carb and fuel injector are different systems the top end was the same. On the ground and in the air. Some days I swapped in an FI just to see if there was a difference in the same climatic conditions. Running a 17 x 13 APC the engines were the same.

Mid-range performance is different due to the ability of the FI to allow you adjust the mid-range. The 1.60 FX performs best if the top end is set slightly rich. It handles the verticals best if set this way. The FI can be set right on the money. This gives a fraction more vertical. With the FX set rich the mid range is a little soft. The FI lets you get it just right.

So the power can be the same but in practice there is a difference. 

Regards,

Eric.

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Tony Quist
Sent: Wednesday, January 21, 2004 11:48 PM
To: discussion at nsrca.org
Subject: RE: YS DZ160s... OS-160 EFI

Does the OS 1.60 FI produce more power then the standard 1.60 fx?

Tony

----- Original Message -----
From: "Jason" <jasonshulman at cox.net>
To: <discussion at nsrca.org>
Sent: Tuesday, January 20, 2004 9:55 PM
Subject: RE: YS DZ160s... OS-160 EFI

>
> Chips DZ 160 was close, but not as powerful as my OS-160 EFI. I don't
have
> #s cause we never ran the same props, and I don't usually tach my
motors,
> but it didn't seem to have the same pull. For fun at the TT I asked
Dave
> Lockhart to pitch UP a 15.75x13 3-blade and ended up with a 14.75
pitch.
It
> flew my 10 3/4 pound Shadow....and I was amazed. Although it was way
too
> fast, it still went through the sequence fine. I flew it again a
couple of
> weekends ago to learn the new patterns and it's just unbelievable the
power
> this thing has. It's more powerful than the 1.70 I had in it's twin,
and
> different power from the electric. If I get my pipe fixed and it
doesn't
> rain this weekend, I'll tach it this weekend.
>
> Jason, the lonely sponsored 2-stroke (& electric) pilot
>
>
> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]On Behalf Of Jerry Budd
> Sent: Tuesday, January 20, 2004 8:48 PM
> To: discussion at nsrca.org
> Subject: Re: New YS DZ160s
>
>
> Hi Troy!
>
> >We already know the 140DZ can keep up with any of the 2 strokes...
>
> Any?  Not exactly.  And certainly not mine (for that matter, neither
> of the two YS160's flown at last years Nats came anywhere close
> either).  Prop for prop I was turning 300-500 rpm more than ANY four
> stroke I came across.  How do I know?  I asked their owners.
>
> The simple reality is that most non-sponsored pilots are running 2
> strokes, and most (but not all) sponsored pilots are running four
> strokes.  I'll leave it to the audience to speculate as to why that
> is...
>
> Jerry
> --
> ___________
> Jerry Budd
> mailto:jbudd at qnet.com
> =====================================
> # To be removed from this list, send a message to
> # discussion-request at nsrca.org
> # and put leave discussion on the first line of the body.
> #
>
>
> =====================================
> # To be removed from this list, send a message to
> # discussion-request at nsrca.org
> # and put leave discussion on the first line of the body.
> #
>
>
>

=====================================
# To be removed from this list, send a message to
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#

=====================================
# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#

==================# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#