Cam selection help needed

I have a 67 camaro powered by a 427 with 11:1 compression and large oval port heads. At the present time it has a flat tappet cam but with the concerns of today’s oil I would like to replace it with a solid or hyd roller. The car is a weekend car with 3:73 rear end gears, four speed Trans and power brakes. The car is also equipped with a set of Doug's 2" headers coupled to a 21/2’ flow master exhaust, a 750 speed demon carb on an Edelbrock RPM manifold. Any suggestions would be of great help.

Thanks
Ed

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Originally Posted by Ed M

I have a 67 camaro powered by a 427 with 11:1 compression and large oval port heads. At the present time it has a flat tappet cam but with the concerns of today’s oil I would like to replace it with a solid or hyd roller. The car is a weekend car with 3:73 rear end gears, four speed Trans and power brakes. The car is also equipped with a set of Doug's 2" headers coupled to a 21/2’ flow master exhaust, a 750 speed demon carb on an Edelbrock RPM manifold. Any suggestions would be of great help.

Thanks
Ed

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Pat McCarthy is the resident BBC expert here, but until he shows up, I'll take a shot at it just for grins.:D I have to assume that if you're runnin' pump gas, your present cam is probably closin' the intake valve at around 49 degrees ABDC and usin' a 0.050" duration of about 246 degrees.

To use a solid roller and maintain approximately the same characteristics, I might use a cam such as the Crane 138601. It closes the intake at 48 with 246/254 degrees @0.050", ground on 110 LSA.
http://www.summitracing.com/parts/CRN-138601/

heres the cam that works good hyd roller 621/621 @050 238/246 lc108 or you could go to 621/621 @050.246/254 lc108 but you need more gear and stall .solid roller you i would want to stay with246/254 629/629 cl108 if you have more stall then go up on dur 254/260 .629/629 cl108

Hey Thanks Pat & Tech.
The car is a 4 speed manual trans, would the 254/260 .269/629 cl108 work ok with the 373 gear? Isky cam with red zone lifters? I would like to run the stock valve covers with roller rockers, I have done this before using Crane gold rockers, I had to remove the drippers from the valve covers and use a thicker gasket. Is there a brand of roller rockers that fit better or are they all about the same?

Thanks again for the Help.

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Originally Posted by Ed M

Hey Thanks Pat & Tech.
The car is a 4 speed manual trans, would the 254/260 .269/629 cl108 work ok with the 373 gear? Isky cam with red zone lifters? I would like to run the stock valve covers with roller rockers, I have done this before using Crane gold rockers, I had to remove the drippers from the valve covers and use a thicker gasket. Is there a brand of roller rockers that fit better or are they all about the same?

Thanks again for the Help.

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Wouldn't an 850 be a better choice of carbs?

Nice Car Ed....

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Originally Posted by Ed M

Hey Thanks Pat & Tech.
The car is a 4 speed manual trans, would the 254/260 .269/629 cl108 work ok with the 373 gear? Isky cam with red zone lifters? I would like to run the stock valve covers with roller rockers, I have done this before using Crane gold rockers, I had to remove the drippers from the valve covers and use a thicker gasket. Is there a brand of roller rockers that fit better or are they all about the same?

Thanks again for the Help.

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i just did two 496 engines and used crane golds with stock covers and 5/16 thick gaskets they fit but the only ones that may fit better would be the crower steel rollers or comps. i did a 396 with a stick and the same cam but on a 112 cl and i do have one fresh regrind crane with them numbers and a new 4/7 swap cam with both on steel cores. i would run the hyd roller on the street before the solid roller less your drag racing it or going very hi on rpms past 6500. i do go solid on some builds were a guy will not spend the money on hyd rollers lifters or bigger cams .but if your using red lines you just throwed the price of lifters out the window :3dSMILE: fine lifters but you can buy a hyd roller kit for the red line price and never hear as much lifter lash sound and not having to set them if you do not like this.that why i like to build the hyd rollers for street and mild use and have been moving away from solids lifters. save the solid roller stuff for the balls out stuff :)

Pat, would you consider mine as Balls Out? rd

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Originally Posted by rdobbs

Pat, would you consider mine as Balls Out? rd

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........yep............ :D would you concur?

Absolutely Pat