well if ya gonna go down to your jap imported and get a half cut and drop the motor straight in , chance's are the sr20 will last alot longer , im yet to see one ca18det in a grade at the drifts where silvia's are everywhere ,
you can rebuild but when the afm , tps , ect ect goes belly up you can only replace with a second hand parts

but soon this will be over and well'l be all runnin elec motors in our dattos

every one has a preference

no hard feeling :)