Anyone have rockers on their L36??? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-21-2004, 12:03 PM   #1
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Default Anyone have rockers on their L36???

Just want to know if anyone has put them in on the bonnie. I know the GP'* are relatively easy to do, but we do not have rocking dog bones. Anyone install them? How is the performance?
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Old 02-21-2004, 02:01 PM   #2
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Same exact engine, so you'll see the same gains. It'* easier to do on Bonnies because of the bigger engine bay. Rogue saw over 20 HP gain at the wheels on his SSEI.
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Old 02-21-2004, 09:58 PM   #3
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They are pretty simple to install on the Bonneville, the engine bay has more room, however the engine sits closer to the firewall than the w-body cars do. The L36 is going to have about half the gain of an L67 because it doesn't have any boost, but 10hp is still plenty of power gain. We put 1.9:1 rockers on my moms SSEi in about 2.5 hours. Unexperienced, I would leave about 4-5 hours of time to do it in.

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Old 02-21-2004, 10:37 PM   #4
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They are a nice 1st serious mod for anyone. It'll get you aquainted with the top half of your engine, at very least! You'll feel the difference right away. I recommend going to a higher rate of valve spring at the same time. Some people have seen what'* called valve float. The higher rate solves it before it happens. I went a step further and had larger valves installed a couple of weeks later.
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Old 02-22-2004, 12:08 AM   #5
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Do the larger valves have any gains? Also I believe that ZZP quotes the rockers as giving 13-17 HP at the wheels for the L36 engine. The 3rd gen rockers for the L67 bring in 20 to 25 HP.
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Old 02-22-2004, 12:18 AM   #6
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Quote:
Originally Posted by complinitor
They are a nice 1st serious mod for anyone. It'll get you aquainted with the top half of your engine, at very least! You'll feel the difference right away. I recommend going to a higher rate of valve spring at the same time. Some people have seen what'* called valve float. The higher rate solves it before it happens. I went a step further and had larger valves installed a couple of weeks later.
How much bigger are your valves over the stock ones?
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Old 02-22-2004, 04:34 AM   #7
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That power figure for L36 sounds right. I think N/A will benefit alot, because it needs longer time to get more air in, cause it'* not compressed.
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Old 02-22-2004, 11:59 AM   #8
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After you add the rockers, I think it would be a good idea to put on a nice exhaust.
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Old 02-22-2004, 01:40 PM   #9
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what about a L27?
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Old 02-24-2004, 10:58 PM   #10
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Quote:
Originally Posted by joe
what about a L27?
Let us know when you find some 1.9 rockers for it. It would benifit just as much as the L36, but finding the parts is the problem.

Shawn
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