ive been told that you can take a 305 and have it bored out to a 327 or a 350. is that true and if it is how reliable and strong is it and how much would it cost? and would the stock inside take a crank,cam,rods,pistons, and etc from a 327 or 350 any help would be great thanks. im planing on doing this with my 82 elco if its possible cuz ive got a good deal on a 305 for 175 with a engine stand and rebuild parts
yeah not gonna happen , the block wont be streetable if bored out that much
as cheap as 350's are just find 1
i thought that it was possible because all the small blocks were all built with the same cast but bored out different sizes but i guess im wrong
nah 305s are a waste. good paperweights
Yeah.. start with a 350.
If you have a jones to bore out, you can go to a 383 and not lose any street prowess.
305 = waste of time.
My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
Short Hand wrote:305 = waste of time.
Exactly! 350s are everywhere...
I however am working on a 292. Fun stuff!
How many steps to heaven, Doc?
...Ah, metaphysics.
292--good bulletproof motor! My dad had one for over 200,000 miles with the original clutch.
You can pick up running, intact 350s for $250. You'd easily spend that on a teardown, rebuild and machining a 305 block.
1989 Z24 Convertible - Dust Covered
2006 tC - Dust Covered, but driven more
It's not a rumor, Car Craft or Chevy High Performance or Super Chevy did a 305" to 327" engine build a few years ago, it actually put out decent power too.
all the 350s i can find for under 500 around here have been railed on and need to be rebuilt and all the 327s or 383s all are over 700 and sometimes i can find one cheaper but has to be rebuilt
The 305's are fine engines. No worse than a 350. However, because GM V8 blocks are so plentiful it's really not that useful to modify them unless you already have a really good block and the parts to do it with and are just "Werkin with watcha got."
You can stoke out the 305 to about 329-331 cubic inches (I think) using a 400 crank and a mild boring out. I don't think you can bore it out to a 350. Either way though, those 26 cubic inches really aren't gonna mean much over good intake/exhaust, headwork and a cam.
I agree with everyone else though. Unless you're on a really tight budget it'd be best to put the 305 in storage and modify a 350.
I have a 305 in my '84 truck and to does alright. by no means is it fast or fun but it gets the job done. Some things i did to make it more "fun" was to mess around with the gearing. my 305 is pretty much stock other than vortec heads, intake manifold and exhaust system. by far some of the best things i have done have been gearing related. A 700r4 will provide a really low first gear while giving you very good freeway rpm. Also swapping out the rear end gearing will do wonders. i went from a 3.08 to 3.48 and also helped my mileage.
The only reason i still have the 305 is because the truck has 60,000 miles on it. plus matching #'s are always a plus
Nice looking truck! I wand one just like it...same color, only I want a GMC.
Go Go OG Traction!!
I have a 83 Custom Deluxe. With a 350 in it. In Florida if you know where to look you can get a running 350 for $100 or less sometimes.
FU Tuning
a 305 block cannot be bored to a 350, the cylinder walls would be way too thin, the most you can safety bored and stroke a 305 is like 335 ci
305s are a waste of time to mod, they make great DD no fun engines though. real reliable.
-Borsty
Dude, I got a complete, but un-assembled 350 for $50.
Look around, don't waste time getting serious power out of that 305. It won't happen. I have experience, although I bought my car with all that it has on it already.. it's still not what a 350 would be with the same mods.
1983 Camaro Z28
Proof that 305's aren't just good for boat anchors.
Quote:
2007 Engine Masters Challenge
Team #24 - David Kauffung, DYNO #1
Steve Haid, Evan Haid & John Crawford
Pull # Torque / Horsepower
1 336.7 / 290.4
2 337 / 291.2
3 334.9 / 289.7
Avg. 336.2 / 290.4
Final Score - 2047.8 @ 306 CI
BACKGROUND
The Kauffaung's brought a 305 Chevy which has a small bore, long stroke combo that has proven itself worthty in previous EM competitions. An unusal feature of this engine, was the use of a Rochester Quadajet carburetor. Even more notworthy was the remarkably smooth idle as the engine ran at 730 rpms on the dyno. A wide lobe separation angle of 112 deg., contributed here. It seemed as though a quicker secondary opening rate and a more aggressive camshaft may have put this engine in the pack.
Not bad numbers for a motor that came from GM making 180hp.
For @!#$s and giggles heres a link to a bunch of dyno run videos of the various engines that were in the competition
2007 Engine Masters Challenge dyno pulls
