Noticeable idle

[aspen77rt]

Yes, much better, that's a chebby cam as they say.

Edelbrock 7102 Chevy SB
Advertised Duration (Int/Exh): 308/318
Duration @ .050 (Int/Exh): 234/244
Gross Valve Lift (Int/Exh): .488/.510
LSA/ICL: 112/107
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6500


Edelbrcok 7177 Mopar SB (The one you posted)
Advertised Duration (Int/Exh): 308/318
Duration @ .050 (Int/Exh): 234/244
Gross Valve Lift (Int/Exh): .488/.510
LSA/ICL: 112/107
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6500

See any difference in the edelbrock cams?


Lunati Voodoo Chevy SB
Advertised Duration (Int/Exh): 284/292
Duration @ .050 (Int/Exh): 241/249
Gross Valve Lift (Int/Exh): .525/.546
LSA/ICL: 110/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6600

Lunati Voodoo Mopar SB
Advertised Duration (Int/Exh): 284/292
Duration @ .050 (Int/Exh): 242/252
Gross Valve Lift (Int/Exh): .533/.552
LSA/ICL: 110/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6600

See the difference in the mopar and chevy lunati cams? There is a reason for that.

 

[Aspen79]

Yes, much better, that's a chebby cam as they say.

Edelbrock 7102 Chevy SB
Advertised Duration (Int/Exh): 308/318
Duration @ .050 (Int/Exh): 234/244
Gross Valve Lift (Int/Exh): .488/.510
LSA/ICL: 112/107
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6500


Edelbrcok 7177 Mopar SB (The one you posted)
Advertised Duration (Int/Exh): 308/318
Duration @ .050 (Int/Exh): 234/244
Gross Valve Lift (Int/Exh): .488/.510
LSA/ICL: 112/107
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6500

See any difference in the edelbrock cams?


Lunati Voodoo Chevy SB
Advertised Duration (Int/Exh): 284/292
Duration @ .050 (Int/Exh): 241/249
Gross Valve Lift (Int/Exh): .525/.546
LSA/ICL: 110/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6600

Lunati Voodoo Mopar SB
Advertised Duration (Int/Exh): 284/292
Duration @ .050 (Int/Exh): 242/252
Gross Valve Lift (Int/Exh): .533/.552
LSA/ICL: 110/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6600

See the difference in the mopar and chevy lunati cams? There is a reason for that.

Ok I feel stupid... So I see the number differance but what does it mean exactly

 

[compubert]

That article was great, explained a lot that THOUGHT I knew but I wanted to ask if this cam to lifter size applies to the slant six as well?

 

[aspen77rt]

'79 I'm no expert but to my small mind, Ramp rate, velocity more power.

Read the article. I'm not an expert by any means, but I read a lot.

You are cheating yourself with that edelbrock cam. A mopar off the shelf (OTS) grind would be better, but your still leaving stuff on the table. A custom cam ground to your full combo would take the best advantage. Also dont forget a custom torque converter as an option. Again better than something OTS. Look up http://dynamicconverters.com/.

or example, if your lifter's diameter is comparable to that of a 55-gallon drum, it's not hard to imagine a monster camshaft lobe which could lift it a foot or more off the ground. On the other hand, if the lifter is the diameter of a pencil eraser, a similarly matched cam under it would be able to move it only a fraction of an inch without it binding on the lifter edges. These are extremes, but it doesn't take a huge difference in lifter diameter to make a significant difference in the velocity designed into a cam lobe. Mopar engines had relatively large 0.904-inch-diameter lifters from the factory, while Chevy small-blocks came with puny 0.842-inch lifters. So who cares about the size of a Chevy lifter? We hate to say it, but cam grinders do. Typical aftermarket cam lobes are designed to work with a Chevy-sized minimum tappet diameter of 0.842 inch, since a lobe designed for the smallest lifter will work in any engine with a lifter that size or larger. These lobe designs are transferred to masters on cam grinding machines, and the lobe is duplicated onto cam blanks, be it a Ford, a Chevy, a Mopar or an International. Sure, these "Chevy" lobes work well and make horsepower, but the potential advantage of the larger Mopar lifter is left untapped.

cumpubert: I have no exp with the leaning tower of power. Might want to try slantsix.org.