I am like braindead right now and can't believe I don't know the answer to this question. I think I have finally decided to rebuild the whole motor myself and port it in the process, so here's my question: Concerning the primary intake ports (in the intermediate housing) how much do you port them if any at all? I was thinking that you port all 4 intake ports the same, but now after reviewing some internal motor pics I am thinking otherwise. I am tearing the motor down tonight, but from what I could see through the exhaust ports I found a HARILINE crack in an apex seal on the rear rotor. It is just enough to not wipe all the oil off of the wall of the rotor housing, but leaves a tiny line behind (how I know its cracked). To put it in perspective, I can't even feel it with my fingernail with everything compressed together in there. The motor is pretty low miles and I cracked the seal because I was rushing to finish the car for the annual racing event and forgot to tighten the CAS nut! You would know I blew the motor at a moderate 10 psi and full rich just to find out that the timing was FULL advanced! I guess that's just typical of me to miss such a stupid detail getting distracted. This is strange becuase I have never seen a blown motor car run SO well before. The car will start right up on the first crank and EVEN IDLE at 750!! The compression test was like 90-50-50. BTW the car has a to4 60-1 HIFI with a P trim turbine and .96 (which I am gonna switch with a smaller one its TOO LAGGY!). Please let me know what you guys think I should do.
Patrick Harris

 

If you're asking questions on port shape, I'd suggest getting porting templates from Racing Beat/Mazdatrix.



-Ted

 

They seem to only send you the port for the secondaries, are the primaries to be ported the same? that doesn't seem right for some reason.
Patrick

 

You can port them the same, but most people just port the upper areas from the port templates.


-Ted