The turbo motor responds well to a few small tweaks to further boost its output. From the factory it was very restricted with a small exhaust and a converter very close to the turbo outlet.

The compression ratio can come up from 7 to 1 to 8 to 1 if you keep the boost under 12 psi. This gives about 3% more power at the same boost but you will need to run 91 octane (193 hp, 241 tq). Going to 12 psi adds a bit more around, 212 hp, 260ft lbs tq.

Larger intercooler pipes, some head portingà. ect all help. The motor tends to build low to mid range torque more easily than hp at rpm. Most of this is that the smallish factory turbo tends to run out of cfm at past 5000 rpm and a very long stroke. 230-240 hp is very reasonable... But what you really get is lots of torque at 2700-3000 rpm.

And yea... 270 hp is very doable.

For a hot rod not perfectà But it looks like Mitsubishi made a great truck motor for the Starion that just happens to fit our trucks.

Off road in low range you wont see too much boost or need it. The motor does not see enough loading for it. In the sand if you are loading down and need some hp it does really help.

The rare times I was short on power lots of tq was seconds away once the turbo spooled (10,000 ft altitude, 100?f temp in a big hole). I had to hold the E brake against to get the LSD to lockup so the motor saw lots of loading.... No way a stock 4 would have done that.

On the highway itÆs a huge difference. You donÆt need to down shift and get the rpms up to make power, boost comes in around 2600 rpm and its easy to get 12 psi at 2800 rpm. Peak tq is around 2600 rpm.

Kevin