Maximum safe BHP for stock 1.5 with turbo

[cali yaris]

9lbs on with a T28 (what Im using) is not the same as 9lbs with a GT2554R (what Garm is using)........

I think you meant was I WAS using -- currently using a GT28 disco potato.

[Blown_xa]

Originally Posted by cali yaris

I think you meant was I WAS using -- currently using a GT28 disco potato.

haha, i was waiting for that. where did the name disco potato come from? i almost wanna buy it just to say i gotta disco potato under my hood cause it sounds cool.

[cdydjded]

Originally Posted by Blown_xa

haha, i was waiting for that. where did the name disco potato come from? i almost wanna buy it just to say i gotta disco potato under my hood cause it sounds cool.

This turbo has a very interesting story behind it, here's the full article and story from Sport Compact Car:

Elsewhere in this issue you will read about how to choose the right turbo for your car. The explanation uses compressor maps, math, and the need to at least pretend you understand some complex engineering concepts.

Here's another method.

Step 1: Drive a car with a really good turbo match.
Step 2: Build a similar car.

A year and a half ago, we drove a very unlikely Sentra. Dubbed the Disco Potato for its unique combination of psychedelic color-shifting paint and unfortunate Jerry Hirshberg styling, the car was the culmination of the clandestine efforts of a few very driven engineers.

The story starts with Dan Passe who, at the time, was a Nissan PR genius with a penchant for bending rules. He conveniently "lost" the paperwork for a 1.8-liter Sentra which Nissan Design International had modified for the L.A. Auto Show. The car quietly landed in the hands of Nissan engineers Steve Mitchell and Mike Kojima.

Meanwhile, a few miles away at Garrett, turbo engineer Jay Kavanagh wanted to boost his Miata. Having full access to the newest Garrett technology, he concocted a physically small turbo with a ball-bearing center section and internal aerodynamics 20 years more modern than the T3/T4 standard the aftermarket is used to.

A few cubicles from Kavanagh, Rob Cadle, a good friend of Mitchell and Kojima, realized Kavanagh's Miata turbo would be perfect for the SR20DET the Nissan boys were planning for the Sentra. He brewed up a turbo, stuffed it under his shirt, and went out the back door.

Jim Wolf Technology built a very mild SR20 for the Sentra, making it functionally equivalent to a stock Japanese-spec SR20DET. The turbo was installed, and amazing things started happening. The car's power was impressive, 280 hp at the wheels, but not earth-shattering. The driving experience however, was. Throttle response was excellent, turbo lag virtually non-existent, and the tire-shredding power was easily modulated. The turbo spooled up early, making so much torque, that the best quarter-mile time (13.7 at 104.5 mph) was achieved launching in second gear.

Mitchell brought the Disco Potato to the Ultimate Street Car Challenge in 2001, and placed an impressive fourth overall. The rest of the time, the car was stashed away in Nissan USA's service garage and used strategically as an attitude adjustment tool. Whenever Nissan or Garret executives needed an injection of gasoline in their veins, they were offered the keys. They would inevitably come back grinning from ear to ear and breathing heavily, eager to bring horsepower to the masses.

There's no telling how many decisions were nudged in the right direction by the Disco Potato, but it did prompt two that are critical to this story. We drove the car for a week, including a 1,000-mile road trip and track day at Thunderhill Raceway. After outrunning every car at the track, and blasting down the freeway at 140 mph, we knew we must have that engine. Ours, however, had to be in a rear-drive chassis. Thus was born Project Silvia.

Several Garret executives also experienced the Potato. They were so impressed, they decided to produce the turbo, double the engineering staff in the aftermarket department, and start applying this modern Garrett technology to a whole range of aftermarket turbos. Technically, this is a GT28R with a 62 trim compressor (.60 A/R) and a 76 trim turbine (.86 A/R), but you don't need to know that. Ask anyone at Garrett for a Disco Potato turbo, and this is what you'll get.

[cdydjded]

Originally Posted by cali yaris

I think you meant was I WAS using -- currently using a GT28 disco potato.

Opps! I was doubting myself when I was putting GT255R......