help with my 200zr

[chris_fox99]

how are you all im new to this web site i have a 1989 200zr with rb20det and this is the only site that can help me ok now where to start my car has a red top what are they like and can i put a sliver head on a red top motor if its better and if i put a skyline computer in it take it and where can i get one and how much and can you tell me what the turbo is and what interchangeable with it and do u all do drives in brisbane as i would love to go with you all one day

[HR31_RB20DET]

I dare say your 200ZR runs the RB20DET NICS (it'll say nics on the plenum) ???

An great upgrade for the standard turbo is a turbo off an RB25. The standard turbo suffers from boost drop off at high rpm. It's a straight bolt-on, but you need the water line off the RB25 or a silvertop RB20 as the banjo fittings are bigger than the redtop RB20's (silvertop RB20's waterlines are same size as RB25)

As for bolting the silvertop head on the redtop bottom end, I personally would just buy a silvertop front cut, sell the parts you don't need including your redtop motor complete. That way it'll work out alot cheaper.

If you want more info, try R31 Skyline Club

[SteveL]

how are you all im new to this web site i have a 1989 200zr with rb20det and this is the only site that can help me ok now where to start my car has a red top what are they like and can i put a sliver head on a red top motor if its better and if i put a skyline computer in it take it and where can i get one and how much and can you tell me what the turbo is and what interchangeable with it and do u all do drives in brisbane as i would love to go with you all one day

200zr uses NICS type RB20DET in Z31 chassis. NICS engine is the earliest type of RB20DET and had around about 140kW in stock form. There's always arguments about the type of turbo on RB20DET's, but it is certainly a T3 flange with a 'small' compressor. The only Skyline ECU that would drop in is from another NICS engine and would make no difference at all.

As has been suggested you'd be better off just bolting in a later engine rather than changing heads. Since the NICS engine uses a 'unique' inlet manifold setup, you'd also have to swap everything with the head + ECU etc, and by the time you've done all that you might as well change the whole motor.

Your existing engine also uses a different sump setup to Skylines. In your case the sump 'bowl' is at the back of the engine, but Skylines have it at the front. To put a Skyline engine in your car you'd need to change over your sump and pick-up. I think it should be a straight swap, but can't say for sure.

Main limitation to performance improvement on your engine is the top mount intercooler. GTiR's suffer the same problems. You'd be best to change to an FMIC and maybe look around at what Z31 turbo (VG30ET) owners fit to their cars as it would also probably be able to work with your car. Try here:

http://z31.com/

good luck.