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Zoomie Headers With Inserts
   

Engine Type: Chevy
Cu. In.: 462
Bore:+.040
Stroke: 4.000

Bodix Valves: 2.250 Dia. Intake 1.880 Exhaust
Isky Cam: (custom grind) Hydraulic Roller 
Valve Lift: Intake .325 Exhaust .340
Valve Lash: Intake .552 Exhaust .578

Street Blower with (2) 675 cfm Demon Carburetors

2 ½” Long “Funny Car” Style Zoomie Headers

3 Disk 2½” CC Inserts With Restrictor Cap on Front and Solid Cap on End

Results:

Without Mufflers 5' 15' 25'
No Muffler: Front      
1000 RPM 90db 85db 80db
1500 RPM 101db 95db 93db
3000 RPM 100db 97db 97db
       
No Muffler: Side 5' 15' 25'
1000 RPM 98 db 91db 88db
1500 RPM 102db 94db 92db
3000 RPM 109db 103db 98db
       
No Muffler: Rear 5' 15' 25'
1000 RPM 90db 86db 81db
1500 RPM 98db 96db 94db
3000 RPM 101db 95db 93db
       
With CC Insert Mufflers:      
With Mufflers: Front 5' 15' 25'
1000 RPM 84db (-6) 80db (-5) 77db (-3)
1500 RPM 92db (-9) 87db (-8) 83db (-10)
3000 RPM 99db (-1) 94db (-3) 91db (-6)
       
With Mufflers: Side 5' 15' 25'
1000 RPM 92db (-6) 82db (-9) 80db (-8)
1500 RPM 94db (-8) 86db (-8) 85db (-7)
3000 RPM 103db (-6) 96db (-7) 93db (-5)
       
With Mufflers: Rear 5' 15' 25'
1000 RPM 80db (-10) 76db (-10) 74db (-7)
1500 RPM 87db (-11) 88db (-8) 81db (-13)
3000 RPM 96db (-5) 94db (-1) 90db (-3)
       
 

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