Here it is guys...the first dyno report for the Sunny. Approx 183rwhp @6,000rpm on about 15psi.

It was a case of bitter sweet really. I had hoped to get about 200hp at the rear wheels in it's curent state, we fell a little short of that. The good news though, is that the engine held together and did everything right. No nasty noises, spluttering or coughing. All the temps stayed right where they should be and everything sounded great. We have one or two small oil leaks which I will address over the next little while, but certainly nothing serious.

This first tune has given us the information we needed to plan the development of the engine. Essentially the plan is to develop it now in three steps.

1. Replace current camshafts with Standard factory turbo camshafts.

2. Replace turbo charger with something more suitable for our application.

3. Add a water injection system.

Our biggest challenge is the 36mm restrictor which is bolted to the front of the turbo, as soon as the revs hit just over 6,000rpm it hits a wall, and the worm turns back down. Combine this with full boost coming on about 3,800rpm, and the cams really startiong to work at about 5,000rpm the whole thing is all happening too late. When you look at the graph, the car is making great power then all of a sudden hits a ceiling. This is the same thing that a number of other competitors have noticed with the restrictor 6,000 - 6,500rpm is about all that you can use.

The goal is to effectively wind on more boost lower in the rev range...we want full boost by 2,500rpm....so by putting back in the standard cams and selecting a turbo with the right specs, we should be able to achieve this. The turbo needs to have a smaller exhaust housing, but a larger compressor housing....this way it can produce more boost much earlier.

The water injection system will allow us to advance the timing by around 5 or 6 degrees, this alone willgive us a good increase in power.

The bottom line is that I am happy with the result, essentially because nothing went wrong (or bang!). I just have an engine with parts which would work fantastically well if I didn't have a restrictor in place. As this is how I bought the engine, and this is the first time I have run it, I now have a base line to start working from......let the development begin. Before I start ripping anything apart though, I am going to take it to the track and have some fun...including the Datsun Nationals. I have been waiting to drive the car now for over 2 years....so I think I will wait a few months before I pull it all apart and start the chase for more horsepower.

Feel free to make any comments or suggestions.

Mark.