LS1 camaro question diy project?
Hello, I was wondering if the stock rockers, In my case LS1 Camaro can be modified to hold open the Valves, kinda like 1:85, with washers or taller hardened pushrods or however. Looking to get a bit more cam so to speak, If not i’ll just buy Crane Gold series. My Issue Is that 50% people say more rocker, pretending its a wanna be cam they didnt feel other then its very quiet, thus helping knock retard, 50% said they felt it. Thanks
Forgot to mention LSA Cam Is- 218/214 .578/.578 112 - "sleeper cam
The life of a rocker is pure hell. The heat, pressure, and vibrations makes one wonder how they last 100,000 miles. If they are 1.5 ratio stock, GM makes 1.6 ratios. It’s about the biggest change you can make without replacing springs. If not, stick to proven systems.
Realize taller rockers open valves earlier and close later, which could gain upper end HP, but loses low end torque.
no.. don’t do that
it also depends on your cams ramp rate.. too fast and you’d do a bit of damage with a 1.8:1 and higher rocker..
References :
The life of a rocker is pure hell. The heat, pressure, and vibrations makes one wonder how they last 100,000 miles. If they are 1.5 ratio stock, GM makes 1.6 ratios. It’s about the biggest change you can make without replacing springs. If not, stick to proven systems.
Realize taller rockers open valves earlier and close later, which could gain upper end HP, but loses low end torque.
References :
NO!. You can’t change a stock rocker into a higher ratio rocker. Longer pushrods just moves the whole rocker arm more towards the exhaust ports, messing up your valvetrain geo.
No way to shim them or anything.
Rocker ratio change is the lenght between fulcrum to tip.
Rocker ratio change is only good for 2 things. Take a stock engine and give it a tad more lift or to use as a tuning tool to "custom" design your cam’s lift and .050" duration.
If you need a bigger cam, no other changes can replace pulling the cam out and installing the right cam in your engine.
Also the higher ratio rocker changes the cam’s ramp speed.. Faster ramps are good, but too fast is bad.
Rocker ratio aint gonna act like a major cam change. 0.1:1 change in ratio will give you about .030" more lift, and add about 2* duartion at .050" but keeps adv. duration the same.
References :