EJ20 engine build (want critique)
Here's the plan. Please critique:
EJ20 stroked to 2.2. CP pistons or comparable, Crower rods, ARP headstuds
Stock heads, cleaned up, valves checked for seal, stock cams, Crower springs and retainers.
AVO 320 turbo (comparable to an 18G). Stock injectors modified to 815cc. Perrin fuel rail. Walbro 255. Perrin pulley.
The car already has a Perrin uppipe, and a 3" turbo back exhaust system.
Don't want a bigger block because this is in a WRX with an automatic trans. The 2.2 will rev faster than the 2.5, and the AVO 320 will have very little, if any, turbo lag. The trans will be modified to handle the increased horsepower (torque converter, etc.).
We're looking for 325 whp. This car will be a daily driver driven to and from a ski area. There is at least 12 miles one way of snow/ice/gravel. Too much whp/torque will probably not be a good thing.
Right now the big worry is whether or not the stock cams coupled with the AVO 320 will provide enough oxygen.