Originally Posted by
Paolo M
After extensive tests, in different conditions, all with Picco Header and the same header, in order to avoid any doubt, here is the explanation of the pipes:
2033: The most bottom and mid, less top
2120: this pipe substitute the 2069. Is the most popular pipe (specially in Europe. Has a good balance of low mid and great top.
2116: this is a new pipe. It has a little more bottom and mid end than the 2120 with great top end. This is my favorite pipe for 1/8 On Road
2046: This pipe has the most torque of all. This is the best pipe for .21 GT motor.
One really important suggestion when you have a new pipe (any brand) is to clean it really well inside. Most of the times the polish compound that is used to make it look nice goes inside the pipe. If you don't clean it, this compound will go into the fuel tank, mix with the fuel and go thru your piston and sleeve wearing it out!!!!
Spray break cleaner or any solvent inside the pipe and then blow it with a compressor... If you don't have a compressor repeat the process of spraying several times.. Better be safe than sorry!!
thanks for the info on pipes, and especially the prep suggestion! I never would have thought to bother cleaning out a new pipe's interior!
if that new pipe shine reduces crud buildup then it's ok, but I still prefer the old flame coated pipes, they seemed much stronger. (dent free)