The rocker arm ratio just increases the cam lift by that amount. If your cam is .300" lift and you have a rocker ratio of 1.6, then your valve lift = .300 x 1.6 = .480". So just plug in 1.7 for the 1.6 and you get your lift with 1.7, which is .510". So in your case you know you have .512" at the valve with a 1.6 ratio rocker.
LS3/L92 Series 6.0L/6.2L 1997-Present, 1.8 Ratio - 8mm- Stud, Offset Intake, Clear Nitron surface treatment. (Guide Plates Required) The LS Series OEM Replacement Roller Tip Rocker Arm System was designed to be the first -drop-in- aftermarket system for the GM LS Series cylinder heads.
Rocker Arms, Ultra Pro Magnum, Full Roller, 1.8 Ratio, Chromoly Steel, Black Oxide, Chevy, 6.2L LS, Set of 16. Part Number: CCA-1678-16
The end effect is this: a 1.6 ratio “ACCELERATED LIFT” rocker arm actually starts opening the valve at a ratio of 1.7. As the valve opens, the rocker ratio decreases to the 1.6 advertised ratio (this occurs at about .250” - .300” valve lift) and then maintains the 1.6 ratio through the rest of the lift cycle until it starts back on the ...
Sep 18, 2017 · On top of that, here are two mods for the LS3 engine that will take some skill, but will add more than 100 hp to your crate LS3. First up is changing the cam timing. The crate LS3 engine has a mild timing of 0.551/0.524-inch lift, 204/211-degree duration, 117-degree lobe-separation angle(LSA).
Manufacturer of fasteners found in engines and drivelines, ranging from OEM replacement parts to specialty hardware for racing applications.
Rocker Arm, Shaft-Mount, Aluminum 1.8 Ratio, GM LS3/L92, Kit - COMP Cams
The Jesel SS rockers are pretty decent for the money, we've used quite a few sets of these on bracket motors with good success. I would advise putting on new springs while you're at it. Chances are good that if the guy had spray on the motor he was ragging on the car. Step up to a 1.8 ratio as well.
Comp Cams 1678-16 COMP Cams Ultra Pro Magnum Roller Rocker Arms, 1.8 Ratio, Pedestal Mount, LS3, Set of 16 Your Price: $367.95 GM LS Ultra-Pro Mag Roller Rocker Arms 1.8