CHOOSING THE RIGHT OIL FOR FLAT TAPPET CAM BREAK-IN All oils are not created equal. by Mike Mavrigian photos by author Avoiding flat tappet cam failure can be as simple as using the correct oil during break-in. Chances are you’ve run into this problem first-hand, or know a builder who has shared his horror stories. [...]
Our Dart Big Chief II cylinder heads came equipped with Dart 1.625T 330 lb. @2.100″/0.910″ max Comp 948 triple valve springs, but since our Crane custom billet cam specifically calls for their 928 lb. springs, we performed a spring swap. Our Victory titanium intake valves measured 2.470″, while the exhaust valves measured 1.800″. Our Crane [...]
Dart 11-Degree Big Chief Cylinder Head Specs P/N………………………18500000 Material…………………355T6 aluminum alloy Comb. Chambers……….56cc (70cc also available) Intake valve dia…………2.470″ Intake port dim. …………1.815″ x 2.725″ w/3/4″ radius Intake port volume………FP CNC – 497cc Intake port location……..Raised 1.500″ spread ports Exhaust valve dia………1.800″ Exhaust port volume……185cc Exhaust port dim………..2.020″w x 1.780″h Exhaust port location……angled & raised [...]
DART RACE SERIES BLOCK Dart’s new monster big block offers a choice between 10.600″ or 11.100″ deck heights, a cam tunnel that’s moved up 0.600″ for better connecting rod clearance with stroker cranks and a choice between 4.840″ or 4.900″ bore spacing. The new tall-deck block offers engine builders great versatility with variable lifter locations [...]
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