webra 91P5 users, please~

[George You]

Hi all:
I saw a good deal on Webra91 P5 (standard). Since I was condidering
os91-Cspec or YS91ST, I's like to compare 91-P5 with them.
I have a few questions regarding this awesome motor, and I
need your precious answers please.
1. How does this motor vibrate compared to OS/YS?
2. Is it dimensional compatible with OS61? May I use
a OS compatible muffler on it?
3. How does it run with 30% nitro fuel? I'd like to
unify my fuel so I'll have to run 30%.
4. Hoe do you like this motor?? :-)

thank you and thank you so much!

best regards

George You

[Stu.]

"George You" <jcyou@dynacolor.com.tw> wrote in message
news:9311f0bd.0304280001.570de0a0@posting.google.c om...
> Hi all:
> I saw a good deal on Webra91 P5 (standard). Since I was condidering
> os91-Cspec or YS91ST, I's like to compare 91-P5 with them.
> I have a few questions regarding this awesome motor, and I
> need your precious answers please.
> 1. How does this motor vibrate compared to OS/YS?

Very good power...hard as nails and will run forever. I have run all of them
and the YS is fantastic on a muffler and the os is ballistic on a muscle
pipe 2.

> 2. Is it dimensional compatible with OS61? May I use
> a OS compatible muffler on it?

The dimensions are the same, but Webras are designed with pipes in mind, so
a muffler is a no no.

> 3. How does it run with 30% nitro fuel? I'd like to
> unify my fuel so I'll have to run 30%.

It doesn't ;-) needs 0-15% maximum nitro.

> 4. Hoe do you like this motor?? :-)

It's a good engine, just takes a while to get run in and tuned correctly.
Not as easy as the OS or YS.

Stu.

[Guy Nicholas]

> It doesn't ;-) needs 0-15% maximum nitro.

I am running mine on 15% with out a shim. I understood you could go to
higher nitro if you add the shim that comes with the motor....not sure
though since I have not done it.

I have mine on a Fury Extreme and I can compare it to my Fury expert with a
Webra .75 and my buddies X-Cell SE with a YS-80.

I started off with a YS 61. Nice smooth engine. It would run 12 minutes on
my 20oz tank. I swapped that out for the .75 with an MP2 and I got
considerably more power yet burned the same amount of fuel. My buddy
swapped his Ys .61 for a YS .80 and his running time dropped to 8-9 minutes
and I don't think his is as powerfull as my .75.

The .91 is still not really broken in, only about 20 flights on it, but so
far it has way more power than my .75 and I get 10 minutes to a tank. I
tried running the MP2 on it but couldn't keep the thing on. I swapped it
for a Zimmerman 1508 header 2820SH pipe. So far, I like it.

Later, Guy