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Original Message
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| I don't have specifics, but... |
| By Dave Shoe - 08/24/2002 12:26:23 PM; IP 67.4.132.204 |
...according to the SAE papers written about the MR development, Ford engineers found that flat-head valves flow the best on MR heads and tuliped valves flow best on the Cammer.
Since lightweight "flat headed" valves are not particularly strong, Ford opted to use a slightly tuliped valve in the MR. This compromised flow slightly, but allowed the lightweight valve to last a long time.
Just what I read.
Shoe. |
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