Stock Rb25det - 420rwhp

[bren]

Just a quick bit of a ramble about our 1996 R33 GTST.

This is where we were ast year with our Skyline:

http://www.skylinesaustralia.com/forums/in...=129241&hl=

An external wastegate fitting sheared resulting in 2.5bar on track. This caused det which damaged a plug leading to bits of plug going through the turbo damaging the turbine wheel.

We took the car off the road for winter, had the turbo rebuilt and put the car back on track this year to see how the engine had faired. A leak down test and compression were inconclusive.

We stated testing the car hard in drift and track use and it was apparent that it had suffered damage as it was using oil and fouling plugs although it still pulled like a train. Presumably the det had damaged a ring land. We did two track days and a drift day before taking the car to Snetteron race track for some more setting up. The car was just getting dialied in and coming on pace (a Porsche GT3 driver commented on how quick the car was after trying to keep up) when it spun a bearing due to oil surge. We checked the oil to find it bearly registering on the dip stick, despite us checking it after each session, it was just consuming too much for us to keep it running.

We already have another engine being built with ported head, Wosner pistons, Tomi rods etc but needed the original lump to keep going for just a little longer. The engine let go on a Wednesday, the first drift round of the year was 4 days later on Sunday. I found a replacement stock engine on Thursday, had it delivered to our tuners on Friday who had it up, running and mapped on Saturday. How cool is that The car is now running around 420bhp@wheels, exact power depending on how much boost we can get away with. It was mapped at 1.5bar and 435rwhp but at that level the spark can blow out so its usually running a little less.

We took the car to a drag strip today where it ran a 12.60 and a terminal of 128mph. I dont do drag so need to work on my launching but the car should have no probs with 11s if we set it up for drag and I learn how to set off.

The cars being built to compete in various UK drift competitins with the engine as above plus various other parts including a PPG straight cut dog box. Its going in to our cage guys tommorrow and the engine will be dropped in in 2 weeks. We are hoping for 450rwhp.

You might be interested to hear that the car is now significantly slower to come on boost than with the old lump, the only difference being that the new engine is completely stock and the old one had a 1.8mm Trust head gasket and Tomei Poncams.

Edited March 11, 2007 by bren

[Roy]

Havent seen too many ppl using the TD06-25G. Great results, It seems the 25G and std RB25 engines get along famously

[bren]

Havent seen too many ppl using the TD06-25G. Great results, It seems the 25G and std RB25 engines get along famously

The turbo works amazingly well with the RB25, very smooth and linear power delivery