1: Nissan Garrett T28 and GT25 series
Throughout the ’90s Nissan released several powerhouses that shook the automotive tree, and caused many upsets thanks to turbocharged technology that remains very impressive to this day.
There are three different types you should keep an eye on. The Garrett T28 ‘frame size’ turbo was one of the largest to come from Nissan. The Garrett TB2804 turbo as fitted to the Pulsar GTI-R was released with the largest exhaust housing of them all. We have seen plenty of applications for this unit with boost as high as 18–20psi. It’s a fantastic upgrade for east-west–configured engines such as the Avenir GT4-Z or U13 Bluebird, or as a bolt-on plus-T option for SR20DE/VE Primeras and the like. Expect to see 200–220kW out of this turbo, depending on your tune and supporting modifications.
The Nissan Silvia S15 Spec R was released with the best OEM turbo available — the GT2560R. It features ball bearings and a large turbine wheel and compressor wheel, similar to that of the GTI-R turbo. This is a fantastic bolton upgrade for your CA18DET or SR20DET Silvia, and will punch out a very responsive 220kW with an upgraded exhaust system, intake, intercooler, fuel pump, and Z32 AFM. This turbo is a great upgrade for many applications, though if you wish to retrofit it to another engine, a four-bolt T2 flange is needed, along with a five-bolt flange to marry it up to your new downpipe. Both of these turbos are water and oil cooled.