Comp cams thumpr

[SouthBoston]

Is anyone using the comp cams thumpr cam?

 

[94K1500KBAR]

Thats a lot of lift. .513/.498 for the Thumpr, .522/.509 for the ***** Thumpr and .533/.519 for the Big ***** Thumpr.
You could run the Thumpr with stock converter but its best with a 2000+ converter and gears, has a choppy/thumping idle

 

[SouthBoston]

Ive got a 5 speed so I thought I would go with the thumpr. Would I see an increase in power?

 

[94K1500KBAR]

Yes, noticable but not drastic, you would also have to change valve springs too bc of the high lift.

 

[firefighter_2319]

im running the big ***** thumpa cam, had to have 9:5.1 cr gears 2800 stall, and changed springs.

 

[94K1500KBAR]

im running the big ***** thumpa cam, had to have 9:5.1 cr gears 2800 stall, and changed springs.

Per Comp Cams you only needed a 2500+ stall, 9:1 Copr, intake, gears, and headers.

 

[firefighter_2319]

Per Comp Cams you only needed a 2500+ stall, 9:1 Copr, intake, gears, and headers.

tried that cr before and ran like hell, plus burnt a hole in #6 piston

 

[SouthBoston]

What mileage changes do you see with the new cam? Any one running another cam they would recommend over it?

 

[94K1500KBAR]

sorry misread. I was thinking of the ***** Thumpr. Not the Big ***** Thumpr.

 

[firefighter_2319]

no biggie, never ran that one. think my other one was a comp cam cr1255 but not sure on the number tho. but good idle choppy