suiram

Don, Ive been using the same Iridium spark plug as you quote in my own RB31de. I use my car for week end Cruising and Night Drag Speed Wars in Auckland. Ive had no problems at all. Im pretty sure that these are RB25de plugs. Have never tried Platinums or coppers in my skyline in 6 years of ownership.

Thanks, Inlet is a trust plenum and extractors are HPC high temperature coated coby. The car pulls like a tractor, 1000rpm to 7500rpm. Dyno sheet has 2 straight lines, torque horizontal and power upwards till cutout. Its nice to drive and fuel economy is good too.

I have an RB30DE in my R33 S1 now for 18 months. Theres a picture on this thread (page 1) by Skyla dated 30/01/05 of my conversion. I Have a RB25 S1 head, with RB20DET inlet cam. This is so adjustable cam wheel can be fitted when I have time. The throttle body is a self made 80mm leading to a trust filter behind the bumper above the splash panel. RB20DET injectors fitted (top mount) are feed by an adjustable fuel pressure regulator set to 37 psi. Exhaust is via coby extractors to 3" exhaust with 2 mufflers. So far only problem was using a bolt for the second idle pulley. This broke as I was pulling into my car park at work causing cam belt to slip over cam wheels. There was no damage by piston / valve contact. It now has a stud fitted similar to the original one. My complete conversion so far is about $3000 with manifold being the greatest expense. I have 137 rwkw at the moment and the car is my daily driver. For all you N/A fans, You don't need a turbo to have fun. My personal number plate is SLOG (slight lack of grip). HAVE FUN