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Old 09-10-2011, 11:22 AM   #114
TheMAN
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Join Date: Feb 2010
Location: USA
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Actually, that is not what I got from Mazda:
http://www.protegefaq.net/mods_engine.html#FP_manual
http://www.protegefaq.net/engine.html#FP-DE
http://www.protegefaq.net/engine.html#FS-DE

Information are accurate. They were taken from US, Japan, and Europe service manuals and parts catalogues. As you can see, the FS-ZE cams have more duration and lift than the FP-DE cams. The only thing that makes the FP-DE cams "better" is the exhaust cam which has advanced timing to give more overlap compared to the FS-DE/FS-ZE cams (except when the Mazdaspeed one is used). When using the FP-DE exhaust cam in an Euro/Aussie FS-DE or JDM FS-ZE (while still retaining the FSH9 intake cam), the overlap is a decent 4 degrees increase. The FP-DE pistons are the same as your Aussie/Europe FS-DE pistons, but the resulting compression are not the same. Obviously crankshaft is different but so are the rods. The FP-DE rods are much stronger but neither the FP-DE crankshaft nor the rods can be used in the FS block because the deck height is taller and the pistons will never reach the top!

Last edited by TheMAN; 13-10-2011 at 03:41 PM.
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