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Old 05-10-2007, 02:01 AM
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305 cam

Just a little question for you guys, been thinkin' , "can you put a 350 cam on a 305?, and, "can you put a 305 cam on a 350 chevy?, and "why not?"

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Old 05-10-2007, 05:00 AM
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If you're talking factory cams then in many cases they use the same cam, some versions of each had a slightly different cam but they can still be interchanged. There are applications where a cam from one might not work as well in the other such as carb vs. EFI but it will fit and the engine will run.

In the case of performance cams the same cam will operate in a higher RPM range in a 305 than it would in a 350 because of the difference in engine displacement and vice versa. 305's also seem to like a little tighter Lobe Seperation Angle than the 350.

Hope that helps.
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Old 05-10-2007, 11:46 PM
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Hippie that helps a lot. So, if they can be interchanged, a stock 305 would performe better on a 350 stock cam? or its not necessary. and what about a 400 stock cam on a 305, maybe Im crazy.
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Old 05-11-2007, 01:23 AM
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Your thinking that a bigger engine has a bigger cam, this isn`t really so in most cases from the 72 "smog" era and up, most small blocks rolling off the factory lines had the same cams, Just because the engine was bigger didn`t mean the cam was, When it`s the factory, anything and everything that could be done to save money was, so why would you make multiple cams if you could make one that would serve all? In some cases where the cam was different it was usually in lobe seperation, not in lift or duration figures. When Fuel injection came along the cams were changed, the "performance" engines of the 80`s some had bigger cams, but these cams worked with the throttle body injection and tuned port injection used at the time, they would also work in a carbed engine. Take point in the 4.3 V6 that came stock in my 92 chevy pickup, it had a roller cam from the factory, the thing was so pathetic it may as well have had round lobes, but the 4.3 high output that came in some S-10`s were bigger than the isky cam I replaced the stocker with. Most times now when you go to the parts store and ask for a stock replacement cam for a say a 79 350 chevy engine, it`ll be the same cam it pulls up for a 79 chevy 305. They did use some different cams in the early to mid 70`s, anything to try and make it smog legal.
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Old 05-11-2007, 09:46 PM
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I have a 305 SBC in a 93 Caprice. I put in flat top pistons, and a 350 LT1 cam. I notice a big difference in low end
torque right away. I didn't do much more inside the engine except port and polished the heads and manifolds installed a TB spacers.

I really like the way it runs now.
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