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My first engine build
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Posted: 07/12/09 09:55 AM
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Ok fellas here it is my first engine build... I want to do it right the first time so anything you can help me with is highly appreciated. I recently picked up a 1971 chevelle for a project it had a 305 in it. I picked up a 350 for a couple hundred and as it turns out it's only a 2 bolt block but for its intended purpose it should do just fine. I want to build a respectable street engine and I want it to be respected so I decided to build a 383. so if you have built a 383 please tell me the dos and donts
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Posted: 07/14/09 08:13 AM
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ever pick up a printed copy of the magazine?????
you can put 383 into the search window above and to the right... and you will find a bunch of articles on them...
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Posted: 07/18/09 12:04 PM
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For any engine that doesn't have an unlimited budget--spend your cash first on machining, second on the short block. You can always save up money while breaking in your new engine, and then buy a great set of heads later down the road.
2-bolt blocks are fine 'til at least 500hp, just use studs. Splayed bolt 4 bl caps beat the factory 4 bolts (Really designed to hold up to detonation in trucks) anyway.
The big step is, go with an aftermarket crank. Originally, a 383 required turning down the main journals of an original 400 cid crank. You can pay more for an American made crank--if you can find one--or send your money to China and pay less.
Skip the 5.5 inch rods, they most likely side load the cylinder walls. But 'rod length's effect on power is debatable, so you can stay with 5.7" rods, unless you can find a 6" for the same price and not have the wrist pin go into the oil ring lands on the piston.
check the price on GM's 385 cid truck crate engine. It uses a 3.8" crank, and can make power easily. Compare that to the price of building your own.
Factory heads will not feed a 383 well, unless you want your redline to be 4000rpm for towing. Go aftermarket, and one of the car magazines--car craft, maybe?--offered a chart on its website listing airflow for most aftermarket heads. but, frankly, i'd say check edelbrock, get one of their heads-cam-intake packages. they figured it all out for you--why reinvent the wheel?
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