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not sure whether there is a valid difference between a "De" and "DE"
but based on Nissan's engine codes... an SR20DE is an "SR" family engine which is 2.0L which is where the "20" comes from. the "D" stands for dual over head cams, and the capital "E" stands for multiport fuel injection.
the SR20Di stands for SR family 2.0 Dual overhead cam with throttle body injection which is a lower case "i"
still.. i cant find the meaning a lower case "e" for the fuel delivery field... maybe since the capital "E" is a multi port... the lower case "e" is a single port fuel injection? ...this is just a speculation.. dont know if such a thing could or does exist....
anyhow.. if there actually is a difference.. the "e" DOES mean a fuel delivery difference as nissan engines follow this designation..
[engine family][size][valve train][fuel delivery][turbo]
the turbo and fuel delivery are not always present.. if there is no turbo field then there is no turbo.. duh! and if the fuel delivery field is not present it means the engine has a carborator
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