January 16, 2022

Comp Cams Thumpr vs. Xtreme Cam Sound Comparison

Today I’m comparing the sound difference between two Comp Camshafts after a recent rebuild of the engine. The Specs can be found below.
The car is a 1990 Third gen Camaro with a Small Block Chevy 350 with Vortec heads.
The exhaust is shorty headers to 2.5″ dual exhaust to Flowmaster 40 Series mufflers.
Also running a Holley Sniper EFI as well as Holley Sniper Hyperspark ignition system.
This is a fresh rebuild and I am in the process of breaking in the engine and getting back on the road.

New Camshaft:
https://amzn.to/2ELwR9S

Comp Cams Xtreme Energy Cam
Part # 12-234-2
Lift: .447 Intake / .454 Exhaust
Duration @ 050: 212 Intake / 218 Exhaust
Lobe Separation Angle: 110

Old Camshaft:
https://amzn.to/2QDxmpc

Comp Cams Thumpr Hydraulic Flat Tappet
Part # 12-601-4
Lift: .489 Intake / .476 Exhaust
Duration @ 050: 235 intake / 249 Exhaust
Lobe Separation Angle: 107

Leave a Reply

Your email address will not be published. Required fields are marked *