GM 8.1 Vortec: Everything You Want to Know - Dust Runners …
https://dustrunnersauto.com/vortec-8100/
WebAug 18, 2017 · In terms of basic specs, the 8.1 Vortec is very similar to the big-block engines before it. It uses an all-iron construction for cheaper manufacturing and superior strength, a single cam-in-block with pushrods and two valves per cylinder, a 4.250in bore and 4.370in stroke, a 9.1:1 compression ratio, and it only features one variant throughout ...
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