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Old 04-30-2008, 06:57 PM
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1.5 to 1.6 problems rpm change

I have a 482/494 with 1.5. roller rockers. I am looking to get more power, If I change to 1.6 will the rpms change? Can I use the same rods? What problems might I have? Is it worth it?
It is a 355 with trickflow heads.

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Old 04-30-2008, 07:30 PM
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what cam are you using? The duration should stay the same as long as your valve springs can force the valves closed. The 1.6 will open the valve more allowing more air flow. So it's like running a higher lift cam without all the issues you run into with high lift cams...
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Old 04-30-2008, 08:21 PM
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want more power? go with a single pattern cam. Chevy heads in stock form flow far better on the exhaust side than the intake side. Ford heads are just the opposite. Higher ratio rockers are good for about 1 degree more duration and .030 higher lift, as a example going from 1.5 to 1.6.
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