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Old 12-13-2002, 06:18 PM
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Post cheap mods to a chevy 305

what could i do to my stock 305 to get major horsepower without spending over a $1000

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Old 12-13-2002, 08:06 PM
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I am going off the key words in your question. Those being, "305" and "Major horsepower".

NITROUS........Dan
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Old 12-13-2002, 08:24 PM
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for a 1000 bucks, you can just buy a 350, rebore it, flat-top pistons, new cam, new intake, and a high RPM stall converter
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Old 12-13-2002, 09:30 PM
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new carb makes a big difference although I would reccomend 350 or 400
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Old 12-13-2002, 09:54 PM
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"Major Horsepower" and "305" are not words that go together to well. Flogging a dead mule comes to mind. if you got a $1000, invest it in a 350. you still won`t be making "major" power, but you`ll be making a lot more than you would with a 305. Depending on the year of your 305, you could find a 350 and use the crank from the 305, they have the same 3.480 inch stroke. if your engine is a 86 or newer, you`ll need a 86 or newer 350 due to the 1 piece rear main seal these engines use. you can also use your rods and have 350 pistons pressed on. decide what you want to do and let us know, we can guide you on what parts to pick and how to keep within your budget. Lastly, as for "Cheap mods" that make "major horsepower" keep this in mind, "Horsepower costs money, how fast do you wanna go?"

[ December 13, 2002: Message edited by: DoubleVision ]</p>
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Old 12-14-2002, 04:37 AM
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I rekon you could make well over 300 hp with 1 carbide cutter lots of time, 1 new camshaft and a set of equal length headers. A 350 will make you about 5 more hp at 500 less rpm but about 10% more torque which is a bit but unless your driving an army tank or a american pickup truck it's not going to matter that much. You should read this page about the 305 this guy built and do something like that, read the porting the 305 page, goes good enough and cheap (14.049 seconds at 100.82 MPH
) this is the kind of engine I'm building for my Holden HQ low low budget but big on breathing

<a href="http://www.ws6transam.org/fcar.html" target="_blank">http://www.ws6transam.org/fcar.html</a>
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Old 12-14-2002, 07:52 AM
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double vision is that all you have to do . so do you have to balance the engine or just put the 350 pistons on . someone told me that you have to have the assembly balanced because a 350 is balanced differently is that true <img src="confused.gif" border="0">
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Old 12-14-2002, 08:01 AM
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yes, all pieces from a 305 will work in a 350, all you would have to do is change the pistons, the balence of a 305 and a 350 are no different, they are both internally balenced engines. all small block harmonic balencers and flywheels/flexplates are interchangeable except the 400 small block, which was externally balanced. however, the wide hollow 305 balencer I don`t recommend using. they have a bad habit of the outer ring "walking"
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Old 12-14-2002, 08:24 AM
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thanks ill start tering apart the 305 to day and start on my buget build up
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