what makes one different from another?

[DC Turismo]

hey guys, i was just sitting here bored out of my mind and i started to wonder what makes a 2.2 HO carbed engine different than a regular 2.2 engine? I know that the regular engines are like 96 hp and the HO's are 110 hp... but what gives the HO's a bigger gain? Thanks in advance!

[89acclaim]

If I remember right the block is shaved resulting in a +.018” deck clearance.
The carb was re-jetted with a 151 primary and a 429 secondary. I also believe that the cam was retarded by the use of a special Cam sprocket. The numbers I gave are directly out of Mopar performance parts 2.2/2.5 FWD 4th edition.
I hope that can help you.

Daniel Merrill

[Vigo]

thats it right there.. shaved deck for bumped compression, different jetting and retarded cam.

[DC Turismo]

ok thats cool then, even though it went in one ear and out the other, but at least i got an answer to do some specific research on it now! thanks guys!

[Hemi-K]

You guys forgot the recalibrated spark control computer, with knock sensor.