Quote:
Originally Posted by XfireZ51
The secondary throttle plates are in the cylinder head at the IH/Cylinder head interface. As Lee stated, when I port matched to the IH, I only did the primary ports. I did do the head match w the heads on the motor. My garage looked a bit like a a surgical theatre w plastic wrap over the motor and only an opening over the cylinder I was working on. Used pillow foam to block the runners and would vacuum everything before removing that. As a final, I used 6" QTips dipped in Vaseline to clean up any burrs by the valves.
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Yep! Same here ^^^, except I did remove the secondary plates at that time as I went to 37mm on the plenum and runners. So, a little port match on the secondary runner was needed, and a quite a bit more on the primary side, of course.
Engine covered w/ plastic shower curtain. Only the port being worked on exposed (see ball gauge used to check clearance into the head(s).
Oiled, blue shop towels (x2) stuffed into the bottom of the ports to catch debris.
