Flow dif. SOHC vs DOHC 2.3

['97-2.3L-ranger]

does all the 01 and up 2.3's have dohc? besides a sealed timming chain for oil lubracating what else is dif. i thought mabe it would have cam(s) postion sensor.

[nagelandy55]

As far as i know the two engines are completely different.

[rangergt]

nagelandy55 you are right, there is no similarity between these engines accept for the displacement of 2.3 liters. Even that's not identical just the 2.3 designation is. As far as head flow is concerned here are some quick comparisons. The 2.3 lima data is from boports (I know he's not without controversy but it's the data I can find). Stock head intake port 150-170 cfm depending on the head. Essliinger aluminum D port head intake port 206.9, boport stage 4 258.2 @.650" Exhaust port 177.7, boport 217.5@.700". And according to boports results the esslinger arca head intake port flows 290 cfm @.700".

The data I have for the duratec is from a uk companies website. Stock 2.0 duratec head 255 cfm @.500" Through interpolated data frpp cnc 2.3 head 295 cfm @.500". Cosworth cnc 2.3 head 300 cfm @.500" . All measurements were taken at or converted to 28" h2o test pressure. For an interesting comparison the Esslinger arca head flows(according to boport) 252.3 cfm @.500"

So from the rough data here it shows the duratec cylinder head is superior to the lima head even the esslinger arca head. This is no surprise considering the duratec head is a 4 valve head(and 30 years difference in technology) and considered one of the best flowing 4 valve heads.

This is by no means a cast in stone comparison. All the data comes from different sources and who knows how accurite there flow benches or testing methods were. The best way to compare is to flow test all the heads on the same flow bench.