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Original Message
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| RE: port area of tunnel port heads |
| By Mel Clark - 11/03/2001 7:05:50 PM; IP 152.163.207.199 |
| According to Ford engineers the High Riser is comparable to the Medium Riser with only 1 horsepower difference. However the Medium Risers have better low and mid range torque characteristics. In a big inch engine and a medium weight car the Tunnel Ports will make you feel like you have rocket assisted propulsion, there is nothing like 'em. According to paperwork filed with the SAE the Tunnel Ports flow somewhere around 15 to 20 % more than either the H.R. or M.R. heads using Ford cams. Just a little bit less than the SOHC. |
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