Originally posted by Big Jim:
"Double overhead cams (hollow camshafts), chain drive, roller finger followers with hydraulic lash adjustment, hehive valve springs, four valves per cylinder, EXTRUDE HONE Powerflow TM process applied to secondary intake ports."
So at least this part of the second iteration of the 98 Contour SVT technical information is clear that it is only the secondary ports that get the extrude hone process.
Secondary Ports
IN THE HEADS! Not the UIM. Just like I posted earlier.
See how the entire paragraph is talking about cylinder head components...
Even in your previous post you quote the SVT brochure saying the UIM:
"Airflow-tuned upper intake, cast aluminum plenum chamber,
extrude honed internal surfaces."Nowhere does it state "Only the Secondary Ports"
The UIM in it's entirety has the EH process done to it. Please feel free to call EH about it. I certainly have. If I can't convice you, I am sure they can...
