bigger lift?
Thread Starter
Junior Member
Joined: Oct 2007
Posts: 96
Likes: 0
From: Astoria, N.Y.
Car: 1986 Z28 Camaro, 2002 Audi A4 (DD)
Engine: 350 .30 over w/bang for buck combo
Transmission: 700r4
Axle/Gears: stock for now
bigger lift?
Hey just a random question that popped into my head but..
These are my cam specs:
Cam/Lifter Kit Advertised Intake Duration: 282
Advertised Exhaust Duration: 282
Advertised Duration: 282 int./282 exh.
Intake Duration at 050 inch Lift: 224
Intake Valve Lift with Factory Rocker Arm Ratio: 0.465 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.465 in.
Exhaust Duration at 050 inch Lift: 224
Lobe Separation (degrees): 114
Duration at 050 inch Lift: 224 int./224 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.465 int./0.465 exh. lift
My question is i just put 1.6 rockers on it.. how much does that increase the valve lift?
These are my cam specs:
Cam/Lifter Kit Advertised Intake Duration: 282
Advertised Exhaust Duration: 282
Advertised Duration: 282 int./282 exh.
Intake Duration at 050 inch Lift: 224
Intake Valve Lift with Factory Rocker Arm Ratio: 0.465 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.465 in.
Exhaust Duration at 050 inch Lift: 224
Lobe Separation (degrees): 114
Duration at 050 inch Lift: 224 int./224 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.465 int./0.465 exh. lift
My question is i just put 1.6 rockers on it.. how much does that increase the valve lift?
Senior Member
iTrader: (1)
Joined: Feb 2007
Posts: 730
Likes: 0
From: Minneapolis, MN
Car: currently a 91 G92.
Engine: 305TPI
Transmission: Borg Warner WC 5 speed
Axle/Gears: 3.42
Re: bigger lift?
You can divide your gross valve lift by 1.5, the factory rocker arm ratio, which will give you your lobe lift. Multiply the lobe lift by 1.6 and you will get you your gross lift with the 1.6 rocker arm ratio.
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