Re: Super Tigre Carb Tuning

Hi Ted,
My experience with the 5 ST engines that I have owned/own has been varied.
I have never experienced that moving the spray bar has made a difference
in 
the performance of the Super Tigre engines. I have also tried placing a 
brass ferral in the carb throat to decrease the intake diameter with no 
positive effect.
Today I have two G-51 that are three years old and they both misbehave on
a 
regular basis. One is on a Seamaster and I have the low needle at 8 plus 
turns out to keep the low end and mid transition from going lean. The
other 
G-51 is on a trainer and is always full of surprises. I don't know if
these 
engines are sensitive to barometric pressure or the alignment of the 
planets. Some days they run very acceptable and other days they are 
threatening to stall during transitions.
I have a G-45 and a 40 (Italian made) that run like clocks with no issues 
what so ever.
I did own ( and now returned to Tower Hobbies with full refund) a 61 size 
engine that ate three planes.

I see others peoples responses indicate that they need a lot of break-in.
If 
more that three gallons of fuel does not qualify for break-in, then I need

to sell these G51's to some unsuspecting person on Ebay and go buy some 
magnum XLS-46's.
I have not replaced my temperamental ST G-51's because I am frugal and I 
like a dead stick challenge at least twice a week. If I were to purchase
new 
engines I would not purchase a ST again. I own OS, GMS, Magnum, Jett and 
Weston engines and do not have the trouble that I have with the two
G-51's.

On a side thought, maybe the issue with the G-51's are a quality issue
with 
machined surface tolerances and are on the margin of acceptable
dimensions.
Does anybody know what happens when the crank intake area under the carb 
opening and the inside wall of the crank case get leaky?

Thanks for reading
RCS

"Ted" <tkennedy63@[EMAIL PROTECTED]
> wrote in message 
news:b975c373-fd62-4388-8d65-3ad1457d1364@[EMAIL PROTECTED]
>I am having a bit of a problem getting my ST 51 to run smoothly. I
> have had STs before so I know you have a delicate balance between the
> low end and high end before you get it just right. I recall reading
> somewhere that the position of the spray bar is very critical as well.
> Has anyone also heard of this? And what position would be ideal? Most
> engines like it pointed straight down but I seem to think the STs
> prefer a little upward thrust of the spray so if you are looking from
> the needle valve side it would be pointed around 4 o'clock. Any
> thoughts or experience on this? Many thanks.
>
> Ted