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Old 04-21-2004, 08:58 AM
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Join Date: Feb 2000
Location: London, Canada, ONT
Cobra Make, Engine: SPF 1630 '70 429 SCJ / 501
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I am using the same Crane hydraulic roller cam as Tom along with the Crane Gold roller rockers. I also used the Crane steel distributor gear with the steel cam. I wanted to use the 6.8" rods and that would have worked with the Ebrock 95cc heads. Instead I chose the Kaase SCJ 72cc heads and this forced me back to the 6.7" rods to get the desired compression ratio. I didn't go with a bigger stroke because I liked the better rod/stroke ratio on the 4.14" crank. It also gives better clearance between the oil ring and the pin because the piston is a bit taller. I chose the KB hypereutectic pistons because they are better for street use. You can run tighter clearances to improve sealing and reduce piston and ring wear. Many OEM HP engines use hypereutectic pistons today. If you intend to build a race type engine with high compression, lots of revs, wild cam, blower, turbo or NOS then you should use a forged piston. I am always surprised that cobra owners install a front sump oil pan. These are designed to clear the front suspension on production cars. On my SPF, the front suspension does not interfere so you can run a flat type Marine pan. It holds more oil, has better road clearance and runs a centre pickup. I also added the 3 qt Accusump.
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