hahn 20g vs 25g

[99 gs iowa]

Just curious on people's opinion of the 20g vs the 25g, as far as spool time and top end both. Please lets keep it people who have ran both.

 

[glowryder]

its a baby step up. IMO not worth the upgrade if your looking for substantially more power, and or efficiency.

 

[pj91gsx]

The 25g compressor wheel is 60.5mm x 78mm and the turbine that you should use is the tdo6h4 58.8mm x 67.2mm. The gt35r compressor is 61.4mm x 82mm, if that gives you an idea how big that turbo is.

The 20g is 52.6mm x 68mm on the compressor wheel and can be paired with a tdo5h 49mm x 55mm, tdo6 55mm x 65mm, or tdo6h 58.8mm x 67.2mm turbine. The 20g would spool much faster, the 25g would be a lag monster.

The 25g would work well for a stroker motor, and adding a larger throttle body helps pick up spool with a larger turbo like that.