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Mod | | | Forums66 Topics128,162 Posts1,056,941 Members48,458 | | 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: Mar 2010 Posts: 1,660 Curmudgeon | | Curmudgeon Joined: Mar 2010 Posts: 1,660 | It was practical. GM used paint to keep the engine from rusting. Then someone came up with the idea to use colors to make it easier to distinguish engines for installation on the assembly line. The shade of the color was not as important as lipstick, for example, you just needed enough color difference to help with the identification. http://www.1954advance-design.com/Web%20images/PPIP/PPIP-1912-1966-EngineColors.html.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
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