[Angel And The Wolf]

To get a true Atkinson conversion, you will need to raise the compression ratio to 13:1 for the power stroke.

You can do this by shaving the heads, or the deck, or both, to reduce the TDC volume, but be advised that your new 10:1 Intake/Compression volume will be slightly less than your unmodified 10:1 Intake/Compression volume.

You really need VTEC so you can reprogram the controler, because the higher your RPM, the earlier your intake valves should close due to the less efficient cylander filling at higher RPM.

You will need to reprogram your Fuel Injectors too.

It can be done, but you won't get real Atkinson benefits simply by cam regrindng.

That will only give you lower compression and lower power.

You need the 13:1 Expansion/Exhaust, and the 10:1 Intake/Compression ratios

It may be cheaper to simply change out your final drive, so the engine can turn slower at a given speed.