so after a short but thrilling time with the rotary sand rail the engine had to come back apart due to a leaking coolant seal. post assembly teardown revealed a nick on the rotor housing that caused a low spot in the mating surface. soo.... long story short i need a new set of housings. the engine is a bastard of sorts. currently it has 1970's 13b housings , a set of s4 turbo irons and 1970's 3mil rotors .
the engine is streetported, both intake and exhaust. runs between 7- 15 psi.
is one housing better to use than another?
thanks!!

 

How are you working that with rotors and housings both having coolant seal grooves? Dual seals? If you are running S4 irons I would run a set of turbo housings from S4 or later, anything but 13b-re.

 

I think you have something wrong their. should take pics because if you used s4 irons with 1970 13b housings you would need to double up on water seals.

anyways.
get some s5 turbo housings with the s4 turbo irons and thats it.