rocker arm question
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rocker arm question
84 CORVETTE L83. I am going to Jegs tonight to get my new torque converter, I was thinking while I was there I might pick up new rocker arms. I see a lot of people going to 1.6's. I think 1.6's might be too much for me as my cam is so big, specs of my cam are intake valve lift .500 exhaust .486, lobe lift .334. If my research is correct me going to 1.6 rocker arms would make this .540 exhaust and .526 intake. That seems really high and might cause problems maybe ?!??!? IDK. So should I go for 1.6's if it wont hurt anything or stay at my 1.5's.
Last edited by phucking-low; Jul 16, 2015 at 12:21 PM.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Depends on your valve springs, installed height. What are the specs on those?
If your lobe lift is .334, then .334 x 1.6 = .534" intake lift. which mostly jibes w/your stated total lift of .5"
If you can get the .534" out of the springs you have, and not float the valves, it would be a low budget way to gain a little power and tq. MOst who put 1.6 Rockers on CFI's speak favorably of the change. Typically that's on a stock cam though.
If your lobe lift is .334, then .334 x 1.6 = .534" intake lift. which mostly jibes w/your stated total lift of .5"
If you can get the .534" out of the springs you have, and not float the valves, it would be a low budget way to gain a little power and tq. MOst who put 1.6 Rockers on CFI's speak favorably of the change. Typically that's on a stock cam though.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Coil bind:
When the spring is compressed to the point where the coils contact each other. It becomes solid and the results are obvious. There is a minimum spec for clearance between coils, this sources says .060" and that is probably to allow for a margin of safety for things like expansion.
You can install the two rockers, as I mentioned above, and measure between the coils w/a feeler gauge.
When the spring is compressed to the point where the coils contact each other. It becomes solid and the results are obvious. There is a minimum spec for clearance between coils, this sources says .060" and that is probably to allow for a margin of safety for things like expansion.
You can install the two rockers, as I mentioned above, and measure between the coils w/a feeler gauge.
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