Originally Posted by tcs81281
ok I got some stuff coming from gizmomotors, speed master throttle kit, 4-40rods and end links... im sure I could figure it out once everything is in front of me... can someone help on the question of how much header pipe should be sticking in the tuned exhaust pipe. im going to have to cut the exit hole bigger, seen some pics of rios on this site done, but not sure how much pipe to cut off of header. its a 7/8 pipe 90degree from gizmo. I was looking into replacing the stock steering servo on the rio iits only like 53oz of torque,read on here its good to replace with more torque,, what hitec or futaba servo would be best?
You want only about 1/4" in past the inner oring with a starting pipe length of about 13 1/2 " just to be safe measuring from the exhaust port out and around the 90° then straight back to the center of the pipe or the 2" band.
Actually with a Gizmo 90° it takes up about 1" around the bend so you can really measure straight back from center of port straight back to the center of pipe using a 12 1/2" measurement instead as a lot easier and more accurate going straight back. It might need shortening as much as a inch later but you must start long.
The header must be cut nice and straight with a nice rounded beveled edge on the outside of the cut so when you slip it through the orings they won't get cut. You need to grease or liquid soap the orings a bit before pushing the header through.
Did you buy the whole new system with flange and the pipe stop/holder collar?
Servo choice for that might be ok with a Hitec 5645 or Savox 1256 or a Futaba 9156. You could also look at the Hitec or Savox waterproof models. Don't get less than 200 oz in torque.