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Old 05-10-2007, 07:20 PM
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SBC - stock alum intake vs aftermarket

somewhere, at some time, in one of my sleepless nites of internet searching, i found some place that made a mention that the stock aluminum intake would perform better than an aluminum aftermarket intake on an older 305. is there any truth to this ?

in the next few weeks, im gonna be tearing into my 305 to change the cam and add a serpentine belt setup, any and all input would be appreciated !

Thanks
Dale

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Old 05-10-2007, 08:28 PM
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Its called port velocity. Smaller runners keep mixture moving and fuel in suspension. 305 doesn't need big intake runners. Thus,, better performance.
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Old 05-17-2007, 12:04 PM
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I saw an Edelbrock graph that showed a 350 making more torque with a Performer (compared to a stock iron intake) above 3000-3500rpm, but less power below that. I imagine the rpm crossover might be even higher with a 305.
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