12-06-2014, 09:53 AM
If you can find one for cheap, GTC1446VZ is an outstanding turbo... They made 170hp from the factory from a 46mm compressor, amazing for smaller engines that will require higher boost levels, the compressor geometry is designed for it, especially if it's got the stock head, won't get the surge issues of older units.
Another good one would be the GTB2056VL(K) off a late Volvo D5, again, made for higher boost levels, won't surge as bad with the later compressor geometry.
As said the 1749v is a good option, however you may find it won't make as much power as you may expect. I'd guess your GT15 was a 1549 from the factory, so probably had a similar sized compressor, you will see gains as it's a good spooling turbo and the compressor geometry will be slightly better... Hence I say the GTC turbos, they were specifically designed for high power outputs from smaller displacement engines...
Another good one would be the GTB2056VL(K) off a late Volvo D5, again, made for higher boost levels, won't surge as bad with the later compressor geometry.
As said the 1749v is a good option, however you may find it won't make as much power as you may expect. I'd guess your GT15 was a 1549 from the factory, so probably had a similar sized compressor, you will see gains as it's a good spooling turbo and the compressor geometry will be slightly better... Hence I say the GTC turbos, they were specifically designed for high power outputs from smaller displacement engines...
