Do roller rocker arms add horsepower?
Roller rockers make power two ways. First, a rollerized rocker fulcrum reduces energy losses from mechanical friction in the drivetrain, freeing up horsepower. At the same 6,000-rpm peak, we made 401.1 hp and 412.9 lb-ft of torque, a gain of 11.2 hp and 5.9 lb-ft of torque.
Can you reuse old rocker arms?
– if reusing cam/lifters/pushrods/rockers put them back in the same location facing same direction as before and they will be good to reuse as is. If you are doing it, might as well drop it in with 0 miles on it.
What are roller rocker arms used for?
The rocker arm is the part responsible for transmitting the movement of the camshaft towards the intake and exhaust valves of the engine, a process that occurs through the direct contact of these parts with the tappets and according to the movement of the shaft.
Does 1.6 rockers increase horsepower?
Those results found the 1.6 rockers making more than 20 hp over the stock 1.5 rockers. But, that engine was equipped with a smaller cam than this one, and it seemed to really need the additional lift and duration afforded by the higher ratio.
How much HP does 1.7 Rockers add?
Registered. 1.7s on a bolt on stock or smallcam 5.0 is worth 3-5 HP!!
What is the difference between roller rockers and hydraulic?
High lift cams add more movement and friction to the rocker arms, so roller rockers are pretty much a must. They usually have faster ramps (lobes) than hydraulic cams, but not as fast as roller cams. They also need stouter springs than a hydraulic cam, but not nearly as stiff as a roller cam.
Are there roller tips on the Chevy rocker arms?
Note that Crane has a plain bearing in one of their Chevy rockers- expensive, yes, but durable and worth some power according to them. The day is fast approaching when the roller tip will disappear on roller rocker arms; note the newer engines like the 5.7 Hemi, and LS-1 and LS-6 Chevys. The roller tips are a problematic area.
What should the ratio of rocker arms be?
They are the basic type of rockers which are inexpensive to produce, do the job, and last a long time in a stock engine, but expect the ratios to vary considerably. We have seen a rocker designed to be 1.5:1 as low as 1.37:1 and rarely better than 1.43:1.
Which is better needle bearing or aluminum rocker arms?
Our experience with our design has proven that a properly designed solid aluminum rocker arms, with a properly designed oil system receiving full engine oil pressure is the best choice. We have found that our aluminum rockers with full pressure oil system work extremely well and live much longer than the needle bearing rockers.
Are there any advantages to using roller rockers?
Up-grading to good roller rockers will improve the performance by virtue of the improved (correct) ratio. There is no adjustability in these stamped rockers which is also a drawback when trying to use a cam with much lift. They do have advantages. They are cheap and plentiful, and they are quiet.