Car was tuned today!
I bought a blown R34 OP6 turbo off eBay specifically for Stao to do a highflow on. I chose the larger turbine mainly for the extra ~30kw it produces over the 21U housing. It is 500rpm laggier than the standard R33 highflow, according to Stao.
Firstly, installation was pretty straightforward. Both coolant lines had to be tweaked slightly to suit the new CHRA, but the oil feed and return were both direct bolt-ons. Obviously intake and dump pipes are exactly the same as standard.
Basic Specs:
1996 R33 S2
Unopened engine, 104,000km. New timing belt, water pump.
HyperGear OP6 highflow.
Nismo 555's
Z32 AFM
R33 GT-R fuel pump with +12v direct re-wire.
Scotty's intake pipe, A3 POD filter (for now).
JJR Return flow FMIC
JJR Dump to Venom Cat to Apexi N1
BP98
Glamour:
And the dyno result:
Current tune is red, overlaid on the previous tune, which was stock turbo, injectors and AFM @ 11psi.
Verdict: Car feels a lot less punchy under 3000rpm, which I expected. Turbo comes on song at around 3,800, with full boost of 19psi at 4000rpm. It hits hard and fast, where as before with the stock turbo it would feel quite weak in the upper region of the tach. Very happy with the power, and it is still very driveable around town, just less aggressive down low. Fuel economy TBA Might go e85 later down the track.
Big thanks to Stao and Trent for their awesome work