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  #16 (permalink)  
Old 06-12-2005, 07:18 PM
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The lean mean donut machine
 
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If you already have the 305 engine or at least it's short block, it's probably the cheapest and easiest way to 300 HP. Any more than that or if you want more low end torque it will be better to get a 350. If you can get a 350 without shelling out more than a few hundred bucks it's probably a good idea to get it, otherwise stick with the 305. Here's a setup that should get you close to the 300 HP mark:

Holley/Demon 600 cfm carb
Edelbrock RPM Air Gap manifold
Comp Cams XE262 cam (218/224 @ .050, .462/.469 lift)
14014416 casting 305 heads - these are the best of the 305 heads
1-5/8" headers with at least 2-1/2" single or 2-1/4" dual exhaust
Aftermarket HEI Ignition (Mallory, Accel, etc.)

http://www.hioutput.com/tech/343hp/343hp.html

Check out this link for a 343 HP 305.

They used a higher compression ratio, slightly ported heads, and a little lumpier cam than the combo I suggested.

The reason most attempts at building a good 305 end up being an exercise in futility is because many don't have the 14014416 casting heads. These heads have a tall short side radius, a smoother exhaust runner, and a larger 165cc intake port. If you don't have the 14014416 heads I wouldn't try building a 305.

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  #17 (permalink)  
Old 06-14-2005, 10:20 AM
How fast is fast enough?
 
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The last combo mentioned is actually pretty damn good. But if you're tearing down the short block and starting from scratch you'll not only make more power with a 350, but it'll be just slightly cheaper. Do yourself a favor and spend a Saturday in a yard pulling a 350- a complete engine is like 200 bucks. (I got one for $50 once, but that's cause I carried out the top end on my back with a limp- they just wanted me out of there). A well tuned 305 will get slightly better gas milage but if you're serious about going fast and are going to use hipo parts, the MPG's begin to equalize.
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