When you talk turbos, and boost, everyone knows that more is better right? I mean the fact that a turbo is rated at a specific power level doesn’t matter if you can get it to give more boost right? Well…no. While boost is an indicator used for tuning and such there is only so much air that a turbocharger can move. That amount of airflow changes with different turbo sizes, impeller wheels, etc, but if you take a given turbocharger and then start turning up the boost, it will make more and more power. To a point. But what is that point? Watch this video from Richard Holdener and you’ll see what we are talking about.
Here is the video description:
HOW MUCH BOOST OR POWER WILL AN EBAY GT45 TURBO MAKE? CAN YOU KEEP CRANKING UP THE BOOST ON A CHEAP TURBO? WHAT HAPPENS WHEN THE TURBO WON’T MAKE ANY MORE POWER? WHY WON’T MY TURBO MAKE ANY MORE BOOST? THESE QUESTIONS AND MANY OTHERS ARE ANSWERED WITH BACK TO BACK DYNO TESTING ON A MODIFIED 5.3L LS TEST MOTOR EQUIPPED WITH A LOW-BUCK, DNA GT45 TURBO. CHECK OUT THE TEST RESULTS ON THE TURBO 5.3L AT A VARIETY OF BOOST AND HP LEVELS. FULL DYNO, HP, TORQUE AND BOOST DATA SUPPLIED.