Thread: Cam Duration?
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Old 11-29-2003, 10:43 AM
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decooney decooney is offline
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Join Date: Nov 1999
Location: Folsom, CA
Cobra Make & Engine: ERA 623, 427 S/C Cobra. Ford FE 428 Cobra Jet, Ford Nascar TL 4speed - with a touch of raw; "less is more" theme
Posts: 3,882
Default Some other thoughts...

I believe this is a pretty open question that begs for more details before anyone could effectively help to answer the question posted. The same sized cam in two different cars could produce completely different results and satisfaction...

- What size and type of engine will the cam be used in (SB, BB)?
- How heavy is the car? Total weight with fuel and driver, etc?
- Are your cylinder heads ported? e.g. blueprinting...
- What final compression will be used? Guesses don't count here...
- What final gear ratio that will be used in the differential?
- 4/5Speed manual transmission, or automatic with stall converter?
- If manual, wide ratio or close ratio transmission? 1st gear ratio? just curious...
- What diameter, size of rear tires will be used. e.g. how tall?
- How exactly will the car be driven (open country roads or in-town/traffic, race track)?
- What carb will be used and will it be jetted and set up properly?
e.g. jets, power valvles, discharge nozzles, pump cams, blueprinting...
- What sort of air filter can/will be used? Small/Large, can you get air into the motor, or will you be restricted to small air filter use? e.g. very small stellings vs. a large open, unrestricted type 14".


e.g. I'm no expert, but have done quite a bit of testing with a constant set of parameters on the same type engine platform in my Cobras. For example, I installed three different solid lifter cams in the same type engine and configuration Cobra and found interesting and varying results with each. At this point, to me it seems really hard to make a general statement about what to use without understanding more of the underlying details and use requirments first. Good Luck.
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Last edited by decooney; 11-29-2003 at 08:31 PM..
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