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Old 09-05-2009, 03:28 PM
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Brent Flynn Brent Flynn is offline
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Join Date: Jul 2009
Location: Middletown, IN
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Quote:
Originally Posted by silver68 View Post
Remember it is not just the engine you will be trying to put into the elevens, it's the whole car. If elevens are your goal you must look at the whole picture. Before even considering a cam the car must be weighed. Lots of people on the internet seem give opinions on cams without considering weight, suspension mods, gearing (rear & trans), clutch or torque convertor, and tire size & compound. A well planned car can make a hero out of a pump gas street driver without having to have gobs of horsepower. That is the reason some 455s with a xe274 run elevens and others run high thirteens. Another very important consideration is the altitude above sea level of the dragstrip you will be racing at. Big difference between sea level tracks and those at 2000 ft. With a four speed car espescially you will find more e.t. gains with rear suspension upgrades than a cam change. For early birds, calvert racing split mono springs, caltracs, and dual adjustable shocks are the only way to go. That being said, get a custom ground hyd. roller, you will be much happier.
I agree...thats why guys should give as much info as possible. If he has everything else right( gear. coverter, suspension, exhaust, carb-intake, etc) the cam ideas will work without spending the cash for the hyd-roller. This stuff has to be in the ballpark no matter what cam he uses. Although, cam selection depends on all this info. Dont know how much gear he is running, tires, anything. My 68 bird runs 11.63/113 with a 25yr old Engle .503lift shelf cam. It would run even better if i'd go to a taller gear. I run a 4.10 with 30'' tire and go thru at 5600. Stock heads, intake and carb. It isnt that hard to go 11's in a 67-8 bird even with 3.36 gears. I ran 11.88/113.5 back in 1994 wiith 3.36 gears, 29.5 tire, 3600conv, driving power steering, fuel pump, alternator with almost the same engine. Had .540 CC solid in the car then. It Prob woulda ran better with the little Engle tho. Drove it everywhere with that combo at 10mpg.

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1968 Firebird 10.817/122.33 3600lbs trw 455, iron d-port heads/SD intake/q-jet, 9" tires 1.440 60ft
1962 Catalina 4100lbs trw 455, iron d-ports,perf RPM, 800holley, 9'' tires,([email protected])1.578 60' Oct 2010!!

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