Originally Posted by 4racer
hi chris,
what for a manifold did you take for the ha 2613, the kit one, ore another???
witch total head clearence ist the best for 16% nitro.
dieter
I used manifold come with the Kit. ( did they have different size, I would like to try a longer one if available)
I suggest going 0.3mm head shim first, then 0.25 I think is the lowest you can use. Sorry I have not measure the total head clearance on this engine yet.
What Plug were you using Dieter?
I tested back to back yesterday with JP 2620 and HA 2613 pipe. The HA have more Topend but JP 2620 have better torque.
My setting yesterday (but I feel I can still get bit more out of the Axial)
25% Tornado, Air Temp 36C, Humidity 80%
0.4mm head shim with JP 2620, standard Manifold
0.35mm head shim with HA 2613