BIG BLOCK FORD
Would you like to react to this message? Create an account in a few clicks or log in to continue.

Need cam recomondation/opinions

Go down

Need cam recomondation/opinions Empty Need cam recomondation/opinions

Post  chris532 on February 5th 2020, 6:04 pm

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

Posts : 11
Join date : 2015-10-22

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  Lem Evans on February 5th 2020, 8:42 pm

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?

Lem Evans

Posts : 7350
Join date : 2008-12-03
Location : Livermore , Ky

http://bfevansraceparts.com

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  Lem Evans on February 5th 2020, 8:42 pm

Stall speed?

Lem Evans

Posts : 7350
Join date : 2008-12-03
Location : Livermore , Ky

http://bfevansraceparts.com

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  norm on February 5th 2020, 8:57 pm

I believe that is the current cam in the engine.
norm
norm

Posts : 205
Join date : 2009-08-06
Location : michigan

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  chris532 on February 5th 2020, 10:45 pm

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

Posts : 11
Join date : 2015-10-22

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  Lem Evans on February 6th 2020, 1:55 am

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?

Lem Evans

Posts : 7350
Join date : 2008-12-03
Location : Livermore , Ky

http://bfevansraceparts.com

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  chris532 on February 6th 2020, 2:21 am

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

chris532

Posts : 11
Join date : 2015-10-22

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  Lem Evans on February 6th 2020, 11:25 am

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

Posts : 7350
Join date : 2008-12-03
Location : Livermore , Ky

http://bfevansraceparts.com

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  chris532 on February 7th 2020, 1:48 pm

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.

chris532

Posts : 11
Join date : 2015-10-22

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  Lem Evans on February 7th 2020, 5:43 pm

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

Lem Evans

Posts : 7350
Join date : 2008-12-03
Location : Livermore , Ky

http://bfevansraceparts.com

Back to top Go down

Need cam recomondation/opinions Empty Re: Need cam recomondation/opinions

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum