Need cam recomondation/opinions

Need to see if this is the right camshaft for my application. I have a 1979 f150 that I do 300 ft sand drags.

Truck specs:
weight 5000lbs with driver
3.55 gear, but run in 4 low so 6.96 final drive
C6 built to Frank M sticky
34 inch tall tires

Cam specs:
Duration at .050 280in 288ex, gross lift .740 in .726 ex, lobe separation 112

Engine Specs:
572 cubic inches
SR71 heads
Mafia intake
10.5 to 1 compression, 93 octane fuel
1050 dominator

Was talking to a local engine builder, who does engines for some other sand drag guys and he thinks I need a cam with a lower separation angle to help get a heavy truck moving. He's mostly a Chevy guy, so would like the opinion of the Ford guru's.

chris532 wrote:Need to see if this is the right camshaft for my application. I have a 1979 f150 that I do 300 ft sand drags.

Truck specs:
weight 5000lbs with driver
3.55 gear, but run in 4 low so 6.96 final drive
C6 built to Frank M sticky
34 inch tall tires

Cam specs:
Duration at .050 280in 288ex, gross lift .740 in .726 ex, lobe separation 112

Engine Specs:
572 cubic inches
SR71 heads
Mafia intake
10.5 to 1 compression, 93 octane fuel
1050 dominator

Was talking to a local engine builder, who does engines for some other sand drag guys and he thinks I need a cam with a lower separation angle to help get a heavy truck moving. He's mostly a Chevy guy, so would like the opinion of the Ford guru's.

Cam specs are from your engine guy?

Stall speed?

I believe that is the current cam in the engine.

Lem,

Those are the specs from a cam Roger at Kasse sold me. Converter stall will be changed to match what engine needs.

Norm,

This is a new cam, old one had lifter rollers wear a grove in a couple of lobes

chris532 wrote:Lem,

Those are the specs from a cam Roger at Kasse sold me. Converter stall will be changed to match what engine needs.

Norm,

This is a new cam, old one had lifter rollers wear a grove in a couple of lobes

Lifter type?

Old ones were crower bushed lifters. Have read some have had that problem with them, but I believe it was my fault and not the lifters. Followed some advice I learned I should not have. Was told by dyno operator that they leave the set screw out of the polyloks for the rockers, when using a stud girdle. Ran it that way 2 seasons before saw what was happening without them in. Screwed the set screws in and lashed opened up .008 from were I had set. Live and learn

If you are looking for more low and mid range power? If so, using same or similar lobe, a narrower lsa would achieve that.
I.M.O. I'd think the SR71 heads would like more lift than your cam has.

Lem Evans wrote:If you are looking for more low and mid range power? If so, using same or similar lobe,  a narrower lsa would achieve that.
I.M.O. I'd think the SR71 heads would like more lift than your cam has.  

Left message with one of your guys for you to call me.

I didn't get it. Call me two seven zero - 929/5295