Maurits,
Advancing the timing is a mistake. You have increased base HP to
above 100%. Advancing the timing is only a benefit at lower power because
best power delivery is slower. A computer controlled electronic
ignition might even retard the timing (on a curve) at the power you are
attempting to make.
More importantly, you are correct that you are probably running too
lean. However, the RSA-10 is not a carburetor, thus "jet size" is not an
appropriate concept. You must have the servo's flow adjusted at a facility
capable of doing so.
Grayhawk
In a message dated 9/7/2008 5:09:29 P.M. Central Daylight Time,
mvr7@hotmail.com writes:
Hi all,
I have a RSA-10 fuel servo on my IO540 that is in a Legacy and.recently I
have done 3 modifications :
1) Added an inlet scoop which provides 2"
more MP at 200knots
2) Turned up the RPM from 2700 to 2850 RPM
3)
Advanced ignition timing by 2 degrees
I now find I can not get EGT down
below 1370 F. I think I am running too
lean. I think it makes sense to
increase the main jet size. Is this
correct? If so, from what dia to what
dia must it increase? If not, what is
the solution?
Maurits