Anyone doing this, are you welding the tube to the inner surface of the rotor housing, and if so, what alloy?

 

Call up Chip Ursu. He's kinda expensive, but his stuff is artwork!!

https://www.facebook.com/Chips-Motor...055/?pnref=lhc

 

the Japanese tuner method seems to work really well. you mill the hole for the port, and then you mill a slightly larger hole for the sleeve. there is enough meat that the sleeve can then have a flat end, and sit flat on the lip that you just machined in. there is a thread on the sleeve and outer housing wall. then it all gets sealed up with the material of your preference.

welding on the housing is not ideal, you don't want to warp it

 

We use Chips or Guru for our housings. On the pricey side but saves time.

 

Key is that the sleeve really should be a close tolerance fit if not a press fit. The P-port that I built was a loose fit, and the housings crushed a few thou at the intake port because nothing was supporting it and I took the ports to within 12-13mm of the sides. No strength.