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FS: Barely Used! Evo 8 FP4R Cams & Spoolinup COP 'Used' System (NJ)
May 3, 2010, 12:57 PM
#17
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Not if you are revving up to 8k. If you want to do more then FP recommends Beehive springs.
Quoted from their site:
EVO8 FP4R P/N 119FP4R
Designed around factory valvetrain and piston clearance limitations. Increase in mid and upper RPM power. Can be used with factory valve springs and retainers to 8K rev limit, but FP beehive spring kit recommended. Can be used with factory pistons. Somewhat lumpy idle. Recommend increasing idle RPM to ~1000RPM.
Quoted from their site:
EVO8 FP4R P/N 119FP4R
Designed around factory valvetrain and piston clearance limitations. Increase in mid and upper RPM power. Can be used with factory valve springs and retainers to 8K rev limit, but FP beehive spring kit recommended. Can be used with factory pistons. Somewhat lumpy idle. Recommend increasing idle RPM to ~1000RPM.
