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Old 03-08-2004, 06:39 AM
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gunna buy me a sb chev.

Guys-

I have decied to take it upon myself to build a sb chev for my current street car. Rather than go straight for the 350 option, I've been thinking about a much smaller chev between 283 and 327 ci. i currently run a very mild 253, which isn't much fun due to the lazy rear axle i have, but I do enjoy its revving capabilities and quick response. I'm running it behind a 5spd manual and I drive fairly hard- i use every bit of power i have.
Its quite difficult to get a good comparison of small displacement chevs. Its seems that so many have been built for such different purposes that some are said to be hopeless while others are gold.
So the engines are;
the 283, getting rarer but supposedly one of the toughest and a really revvy engine which makes great power for its displacement.
the 307, a longer stroke of the same bore, yet somehow a complete opposite, a dog of an engine yet still seen and talked about in performance street cars.
the 305, a sleeved down 350...i know absolutely nothing about this engine
the 327, a small journal crank in a 4inch bore engine with a loyal band of followers.

What I want from the engine is performance in the form of decent power, high spinning and quick spinning capabilities for quick driving, reliability and decent fuel economy, and also that rarity appeal, having an engine you won't see many times in a year.

So what are the truths and what are the myths about smaller sb chevs, and what do people recommend?...

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Old 03-08-2004, 07:38 AM
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Why don't you build a 302? The famous Z-28 motor was basically a 327 with a 283 crank. Great high rpm motor too.

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Old 03-08-2004, 06:01 PM
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302's are impossible to come by where i live, so it would nean using a 283 crank and 327 engine. in all honesty i would rather save the hassle of mixing parts and just take the 327... A lot of people have told me that the 283's 3 7/8 bore does wonders for its reliability and strength, though...
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Old 03-08-2004, 07:04 PM
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283s are great little motors, but a 327 has more torque and will rev the same....i would go with the 327, especially with the stick trans.
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Old 03-08-2004, 07:36 PM
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How about building up a 250 inline 6? there is speed parts for it,
and you can setup a turbo on it and give everybody a good spanking at the track.
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Old 03-08-2004, 07:45 PM
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The other question is how much $$$$ do you plan on spending?
Are the performance parts easy to get where your living?
A 327 @ 350 HP is kinda sweet.
In Aus. what is rare, the engine or the parts or both?
What high of octane gas is available?
These questions help others give better answers.
A cross ram from this place is one of the best and not seen much over here. I plan on getting one in the far future.
http://www.inglese.com/

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Old 03-08-2004, 07:56 PM
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Out of those engines, the only thing worth building is the 327.

283s are worthless. With the money you need to spend on valvetrain, bottom end, and other parts to make one of these "high revving" engines that people are always talking about, you could have built something a lot faster.

I mean, come on people, do you need your engine to spin above 8,000 on the street? My Ford 5.0 spins to 7,500 with it's aftermarket valvetrain and stock bottom end. It is not going to make much more power buy spinning any faster. At least, nothing worth all of the extra trouble.

I used to have a 307 in my Camaro. The bore is so small that performance heads won't benefit as much. I didn't think twice about setting it out on garbage day.

A 305 has the same bore size problem. The roller cam is almost enough to sway me, but not quite.

The 327 will rev as much as you will need in real life situations. Kits are still cheap for them and they are pretty reliable.

I myself wouldn't build anything other than a roller 350 or a 400.
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Old 03-09-2004, 03:38 PM
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327 parts and engines are pretty easy to come by in aus, unlike 283s which are rare, but i guess thats some of the appeal. i do need a tough engine though, its gonna get plenty of miles on it, which is why i was reccomended the 283, im also gonna run about 3.5 rear gears. the best fuel we get is 98 octane, but for a 327 i might consider an LPG build to keep the projectt cheap to run (like i said its gonna do a lot of miles), a 283 i'd probably keep on 98.
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Old 03-09-2004, 04:20 PM
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Did you consider 350 heads on a 327.
Of course the cam will have to change also.
That'll give the smaller block plenty of snort.
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