A small update...after a lot of headaches and 2 engines...the car is finally back on the road again alive and really kicking with a Rb25det under the hood. A world of difference compared to the rb20det i might add...can really notice the diff in torque and its very responsive now. The next on the to do list is to sort out minor issues with the idle and getting the temperature gauge wrking ok. Pretty sure the tps needs to be adjusted for the idle issue as it idles like a charm with the tps unplugged.
Anyways...the car is going on the dyno tmrw afternoon for a safety check really...so fingers crossed for me.
Current Mods are:
S2 RB25det engine
RB20det gearbox with a rb30 H/D clutch
3" custom dump/front pipe with a 3" Tanabe catback exhaust
K&N Pod Filter
Walbro 500hp fuel pump
Full Gtr body kit
ROH 17" wheels with 215 Federals all around (no good now as cant get traction with the 25

)
After the Dyno run...will decide whats going to happen next. If its running safe then i will get my FMIC on and get an ECU to tune the car.