To put it simply, no. This is a misconception a the majority of peoplehave, and also because the so many bogus newspaper ads out there, you watch the statement, "big block strength in a small block package", and the truth is, you definitely won't gain THAT much an ext power out of 33 extra cubic inches.

You are watching: Chevy 350 bored 30 over horsepower

Actually, we have to compare apples to apples here. A 383 is a .030" over-bore, and also when to compare this come a "350" cubic inch engine, us shouldcompare it through a .030" end bore 350 as well, to keep a level play field due to the fact that if you were going come rebuild her existing 350, it will probably end up being bored .030" over, and also a .030" bored 350 is actually 355 cubic inches. For this reason a 383 is actually just 28 cubic inches bigger than a common / comparablerebuilt 350 which is in fact 355 cubic inches. Therefore are28 cubic inches going come suddenly provide you "big block power"? Hardly.

Let's usage the standard, 1 HP every cubic inch dominion of thumbjust for the ease of mathematics here. So a .030" over 350 is actually a 355 cubic incher, and at 1HP every cubic customs for a mild build, we would gain 355 HP. Thesame goes because that a common 383 utilizing the same dominion of thumb, so we are comparing 383 HP to 355 HP, i beg your pardon is 28 HP difference. Absolutely not sufficient of a gainto offer you "big block power". And also when you're talking large blocks, you space talking "torque" rather than HP, and it's "torque" that you feeling in the chair of her pants once driving around.

So, if a common 454 big block, (also at .030" over) provides 461 cubic inches, and also at 1 HP per cubic inch, we space talking about 461 HP i beg your pardon is a hell of a lot much more than the 28 extra HP a 383 would frequently make in the very same comparison. Yet keep in mind, we are just using the old 1 HP every cubic inch preeminence of thumb here. Of course it would be an ext like 1.2 HP (or so) per cubic inch in truth for most "performance" rebuilds, and on an ext radical enginesupwards of 1.3 -1.4 HP every cubic inch in yes, really nasty street / strip engines.

So why choose a 383 in the very first place? due to the fact that the extra cubes are all by stroke, no by bore. Although a 383 might be do the exact same 1 HP every cubic inch rule as the 355, the will naturally make much more torque every cubic customs simply because of the physics of enhanced cubic customs via stroke quite thanbore size.

Stroke way "leverage" and leverage gets vehicles moving, specifically at lower RPM's. So even though you can not acquire true "big block power" out of a 383, friend will definitely feel the added strokein the seat of your pants contrasted to an identically prepped 355 because the 383 will make much more torque.

See more: Distance Between Springfield Va And Washington Dc, Distance From Springfield, Va To Washington, Dc

Now, if you really want big block strength in a small block package, a 427,434 or even a monster 454 small block stroker will do the trick, but as with any serious stroker of this caliber, girlfriend are likewise talking around a hefty price tag to develop one contrasted to just doing a gentle rebuild on a typical large block, or because that opting to rotate your present 350 into a 383 stroker.