Editing Pontiac V8 engine (section)

===317===
For 1956 the V8 was bored out to {{cvt|3.9375|in|mm}}, increasing displacement to {{cvt|316.6|cuin|L|1}}. A factory 285HP version was built specifically for NASCAR competition, and soon offered as an optional engine in the following forms:

(with [[manual transmission]])
* Two-barrel carburetor, 7.9:1 compression, {{cvt|192|hp|0}} at 4400&nbsp;rpm, {{cvt|297|lbft|0}} at 2800&nbsp;rpm
* Four-barrel carburetor, 8.9:1 compression, {{cvt|216|hp|0}} at 4800&nbsp;rpm, {{cvt|315|lbft|0}} at 2800&nbsp;rpm
* Dual Four-Barrel carburetor, 10.0:1 compression, 285 hp at 5100&nbsp;rpm, 330 lbft at 3600&nbsp;rpm.<ref>{{Cite web| title=New strato-streak engine released | url=https://www.pontiacsafari.com/ServiceCraftsmanNews/56-02-February.pdf | archive-url=https://web.archive.org/web/20231202020450/https://www.pontiacsafari.com/ServiceCraftsmanNews/56-02-February.pdf | archive-date=2023-12-02}}</ref>

(with [[Hydramatic]] automatic )
* Two-barrel carburetor, 8.9:1 compression, {{cvt|205|hp|0}} at 4600&nbsp;rpm, {{cvt|294|lbft|0}} at 2600&nbsp;rpm
* Four-barrel carburetor, 8.9:1 compression, {{cvt|227|hp|0}} at 4800&nbsp;rpm, {{cvt|312|lbft|0}} at 3000&nbsp;rpm
* Two four-barrel carburetors, 10.0:1 compression, {{cvt|285|hp|0}} at 5100&nbsp;rpm, {{cvt|330|lbft|0}} at 3600&nbsp;rpm.