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Old November 30th, 2009, 12:01 AM   #1
84ChevyMuscle
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Default roller tip rockers

I have a 350 that supposedly has 1.94 heads worked to 2.02 and it has a cam. ive been told that i have stainless valves and i know for a fact i have crane energizer pushrods. The heads still have the standard steel rocker arms and i want to switch to roller tip rockers. I figure that since im doing a valve cover swap i might as well do the rocker arms. My question is i guess if i have the stock rocker arms which should be 1.5:1 can i jump up to a 1.6:1 without changing anything, and would i have to run guides for my pushrods??? I dont understand the science behind them and im guess i just need some insight
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Old November 30th, 2009, 04:25 AM   #2
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Originally Posted by 84ChevyMuscle View Post
I have a 350 that supposedly has 1.94 heads worked to 2.02 and it has a cam. ive been told that i have stainless valves and i know for a fact i have crane energizer pushrods. The heads still have the standard steel rocker arms and i want to switch to roller tip rockers. I figure that since im doing a valve cover swap i might as well do the rocker arms. My question is i guess if i have the stock rocker arms which should be 1.5:1 can i jump up to a 1.6:1 without changing anything, and would i have to run guides for my pushrods??? I dont understand the science behind them and im guess i just need some insight
You can run them without guides or anything special. The science behind them is they will give you a little more lift...it's not rocket science
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Old November 30th, 2009, 07:33 AM   #3
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First off why do you wanna switch to roller rockers? This is what i've always went by this quote It depends on what your going to use the car for. If its for the strip, rollers help squeeze that last ounce of hp out of the motor. For the street well....they do have a cool factor when you pop the valve cover but how often do you do that? The money to HP gain is not worth it. I was thinking the same thing when i rebuilt my 350 and made it a 355. I called my cousin who was a teacher @ Sam's Racing and now builds and dyno's engine's for Greg Anderson and Jason Line. He said the same thing, rollers rockers are for higher rpm engines and don't do very much for everyday drivers.

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Old November 30th, 2009, 11:09 AM   #4
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Originally Posted by 84ChevyMuscle View Post
I have a 350 that supposedly has 1.94 heads worked to 2.02 and it has a cam. ive been told that i have stainless valves and i know for a fact i have crane energizer pushrods. The heads still have the standard steel rocker arms and i want to switch to roller tip rockers. I figure that since im doing a valve cover swap i might as well do the rocker arms. My question is i guess if i have the stock rocker arms which should be 1.5:1 can i jump up to a 1.6:1 without changing anything, and would i have to run guides for my pushrods??? I dont understand the science behind them and im guess i just need some insight
you cant go with 1.6 s with those bad azz valve covers you just bought. hope this helps.... unless you grind off the oil drippers then i believe they will work but not positive.
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Old November 30th, 2009, 06:07 PM   #5
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you have to know if the heads and the valve springs have enough clearance to run more lift. on a .550 lift cam with 1.5 rockers putting 1.6's on will net you .586 of valve lift. may not seem like alot but if you have minimal clearance between the coils on the valve spring to begin with, you could max out the spring and break it. or if you don't have enough clearance between the bottom of the spring retainer and the valve seal you could bend or break a pushrod. full roller rockers are worth the money to reduce friction and free up HP, but many people change ratios without doing there homework and end up with engine damage.
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