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Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,107 Posts1,056,221 Members48,436 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | The accepted rationale for swept volume (rather than total volume) is that at the end of the exhaust stroke the chamber is not completely purged of combustion byproducts.
Yes, that does give an interesting advantage to a low compression ratio engine with some method of purging the chamber - such as tuned exhaust and/or a supercharger. | | |
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