Compression on pump gas
TECH Fanatic
Joined: Sep 2010
Posts: 1,037
Likes: 2
Tried of people talking about Dynamic Compression Ratio.
Straight from AIs website.
Common marketing misdirection and fruitless (for the end user) talking points:
New vs. old "Lobe Technology"
Dynamic Compression Ratio ("DCR")
Subjective qualities (e.g. loping, valve train noise)
Assertion that X valve event must occur at precisely X degree ideally
Assertion that one aspect of a lobe form is "the secret" or most important characteristic.
Straight from AIs website.
Common marketing misdirection and fruitless (for the end user) talking points:
New vs. old "Lobe Technology"
Dynamic Compression Ratio ("DCR")
Subjective qualities (e.g. loping, valve train noise)
Assertion that X valve event must occur at precisely X degree ideally
Assertion that one aspect of a lobe form is "the secret" or most important characteristic.
DCR was created by internet experts who all run 8s on cam only stock bottom end cars with full weight. I think the content of Uncyclopedia has more merit than this dynamic compression ratio nonsense.
DCR is a concept that the average gearhead can somewhat grasp. IF you plug the right parameters into the calculator (and that's a big IF), it has some merit at cranking and idle/low rpm, but is useless as intake velocities climb and the other 80% of the factors take over.
For a pump gas LT1 with a streetable cam, I'd limit CR to 12:1. And then only if it's properly built with tight quench so you won't need more than about 30 deg timing advance for max power.
For a pump gas LT1 with a streetable cam, I'd limit CR to 12:1. And then only if it's properly built with tight quench so you won't need more than about 30 deg timing advance for max power.
