Originally Posted by
yollie
anyone know where to start tuning 24065 carb 4btt with 6.5 venturi for 34 celcius ambient.
using 9901/41030>
where the LSN and HSN to start tuning it. i just bought a new carb since my old carb is damaged the HSN is broke
. and i try tuning it and i mess with the needle i don't know where to start now any help will be appreciated
My btt is 2 3/4 out from bottomed on the low speed. The top I'd say is the same as my other carb. That's with a 6 restrictor and 41021 header 2096 pipe. If you run another pipe or bigger restrictor you'll have to turn it out more I'd guess. Maybe start around 3.5 out on the low and where it was on the top with the other carb.
It could also be different from engine to engine, like what Monty experienced so be careful!