Incorrect. An ICE is just a giant air pump. To make more power, you have to pump more air through the system. Fuel is just the catalyst.
A good turbo setup requires less airflow to make the same power because you’re not taking so much power off the about to drive the blower. This is why 12 psi from a turbo can put 850 to the wheels but only makes 750 when supercharged.
Correct Mike, but the higher power level comes from much less parasitic drag losses, not less CFM. You cannot makes more power with less air/oxygen moving through the engine. The average supercharger at lets say 12psi, will usually take around 80-130hp or crank power to compress the intake charge. Some more, some less.
I didn’t say the higher power comes from less cfm. I said it flows less cfm for the same power level. Less parasitic loss means you will make more power at the same airflow. You admit that 100 or so hp can now go to the flywheel that otherwise would have been absorbed by the supercharged. That equates to more power at the same airflow. Conversely, you can make the same power with less airflow.
Not true. If the engine is more efficient, as turbocharged engines are, it will make the same power with less airflow, more power with the same airflow, or anything in between.
I've have some experiences here, but the changes in power may not be 100 % exhaust related so keep that in mind. I had Kooks no cats and MBRP 3" exhaust with 3" straight through oval mufflers. I had 2 choke points the Borla mid resonator with the 2 1/4' in and 2 1/2" out design resonator and then the Kooks had the 3" to 2 1/4" choke down. Dyno at 730 wheels with that way below what I should be at with my setup and PBD cal. I went too work changing everything that could be an issue and exhaust was one so made a complete 3" all chokes out now and straight through resonators in place off the Borla. The other changes was reduced meth injection from 12GPH to 7gph and this time picked up power 784 with same fuel. Not sure which one made the biggest deference between exhaust and meth reduction but picked up 54 wheel.
Thank you for your reply. I would think that most of those gains came from the exhaust changes. 12GPH should easily be consumed efficiently by a motor this size, depending on your water/meth ratio. I had a 7GPH nozzle on a Mazdaspeed3 with a 50/50 mixture, and that car was putting 400 to the wheels. So the factory midpipe connection is 2 1/4"? I thought it was 2.5".
Green cats can fail and mine were showing signs after 2 years of failing, the center on one was folding in from heat at 745 wheel.
Nope I tried?
Green Cats are not that good. GESI "Global Emission Systems Inc." is the MFG.