Originally Posted by
E-Dog
Hi, sorry to keep bothering you
you say shorten it down to 2.425 is that total size of the needle or what ?
I don't quite understand( I used to race electric only).
Also I assume that is milimeters ?
I will also be looking for a LSN from RB/nova thanks for the advice !
Rex has somehow added an extra inch to his LSN measurements
.
The original needle has a total length of 1.6 inches. Grind this down to a total length of 1.42 inches and round off the end just like Rex described. If you prefer mm then make the total length of the needle 36 mm.
This will allow you to tune the motor like any other, using the HSN, then fine tuning the LSN.
The GO motors are fitted with the long LSN's to provide a nice smooth power band. The LSN stays in the spray bar right up to full throttle, which is why they require a richer HSN than normal to let enough fuel through. If you tune them as described on page 131 / 132 of this thread you will have no problems - they run awesome. It's just a slightly different tuning concept thats all. The short needle works fine also. It comes out of the spray bar somewhere between 3/4 and full throttle, so you can run a leaner HSN like other motors. Whatever needle type you decide, your motor will perform nicely
