As crazy as this sounds mate, what about this:
RB30 NA Block, Crank, rods and Pistons (Basically a running short block motor) - $50
New standard Size Hastings Rings - $120
New Standard Sized King Bearings all round - $140
Acid Bath, Hone, Deck Block - $300
Crank Collar and Fitting - $200
Head Gaskt ARP - with Fire Rings - $45
Cometic 3 layer Steel Exhaust Gasket (ebay) - $40
Tappet Cover Gaskets - $15
Front and Rear main seal $100
Cam Shaft Seals - $40
Loctite of Various sorts - $100
RB25 Head - $500
RB25 head recon - $600 (Deck, recut valves, Valve tip heights, weld VCT hole) ((I had 1 hour of porting done on the exhaust side, for $100. Made a huge difference)
Helicoils for Exhaust Side Studs $100
Autobarn Greddy Copy Chrome Intake Manifold - $350 (MUCH better than the ebay ones..!! Comes with all fittings and bolts)
Bolts of Various sorts - $50
RB20 ECU remap - $500
Total: $3250
I'd allocate $4,000 just in case.
How do I know? I did it the weeks between xmas 2010 and new year 2011. My car is running 100%. Had a few hicupps, but that was because I didn't get the head or block decked. Lucky for me, I only needed to get the head decked.
TIPS:
- You put it all together. Don't over pay some other flamin mongrel to do it. Surely you have a mate that is a mechanic. A real mate, not just some dude up the road you know of. Took me about 2 weeks to do a full assembly. Trust me, its not hard. Just make sure you find and engine that hasn't been trashed. Mine came from an old guy that crashed it. The VL had only done 140,000s and was like new. Still had hone marks. The hone I had done to it made it come up like new. Was about half a thou ovaled at the most.
- Use the standard NA pistons, and get CRC gasket stripper and spray the f**k out of them. The carbon will run off like water. Don't get this shit on your hands.
- GET THE HEAD RECONNED! You won't regret it. If you have a spare $100, get the exhaust ported. WIll do magic.
- Get a Standard RB25 exhaust manifold and port it! Don't go paying $5,000 to extrusion hone it. Get a die grinder, an old gasket, and port it. Clean the inside out. Lumps, thick areas, etc.
- Get GTR cams, or NA RB25 CAMs, and don't run VCT. Then you can do a cheap remap of your RB20 ECU, or get a Nistune Daughter board.
- Run the RB25 turbo and limit your revs to about 6,000. Trust me, you'll be smoking the tyres from 1200rpm all the way to 5,000rpm with that turbo.
- Save up for the next 6 months and get a GTX3076 turbo and enjoy 320rwkws with f**koads of torque.
There is your RB30 slapper that will take 300rwkw easier than a hooker being given 2 kgs of crack to give you a blow job.