There isn't any practical reason for a high boost setup to lose power with an FMIC unless 1) the tubing is too small, 2) the IC is too small, 3) the IC core is severely restrictive, 4) there is a boost leak, or 5) you're getting insufficient airflow over the core. The only other reason would be if the tune goes south when the cooler, denser air is introduced into the setup.
You can't defy the laws of Physics and Physics shows that cooler air is more dense, denser air allows more oxygen to get into the engine, and more oxygen = more power.
There is a reason that the only high output turbo race cars that don't run an intercooler are those that run alcohol.
Last Edit: Feb 20, 2012 23:30:23 GMT -5 by Stinger
Post by turbo23240sx on Feb 20, 2012 23:13:24 GMT -5
It's strange as it's a large power stroke intercooler and it loses 5lbs of boost. I wish i had ran it with it by passed with the meth injection as i feel it would have picked up.
It has 2.5" inlet and outlet but it is restictive. I have spoke to a very sharp guy that builds real high powered cars and he was not surprised by it and actually told me before he thought that would happen?
People don't do enough testing i guess they just assume things work and they more than often aren't correct.
Has anyone else done this testing or is it assumption the intercooler is proper for their application?
A Powerstroke intercooler has horribly restrictive end tanks so I'm not surprised. Note how the end tanks are very close to the end of the core which causes the air to flow horizontally past the openings in the core rather than directing the air into the core. A 5psi drop indicates it was severely restrictive.
Again, you can't defy the laws of Physics. If there aren't any issues with the setup (outlined above), you'll make more power with an intercooler, period. It's not an "assumption", it's Scientifically proven.
Last Edit: Feb 20, 2012 23:31:29 GMT -5 by Stinger
There are certainly some people running around with restrictive or minimally effective intercoolers. The stock 2.3T intercoolers are an example. They flow well but their location makes them heat soak from the exhaust manifold which kills their effectiveness. They typically still work better than no intercooler at all though. My old Volvo intercooler setup was horribly inefficient as it doesn't cool very well but it allowed me to run an additional 6-7psi over no IC at all.
There was a guy on Turboford years ago that made over 500rwhp through a very small Starion intercooler. He couldn't figure out why he couldn't make more and finally measured pressure drop and it was something insane like 12psi across the core. He was using an intercooler designed for ~200hp on a setup that should make 3x that amount.
You're results are also severely polluted by your use of Meth Injection. It allowed you to get away with running a ton of boost without detonation. Had you been on straight pump gas, you'd find you couldn't run more than 15psi or so without an IC and most likely more with the IC at that point.
Last Edit: Feb 20, 2012 23:45:31 GMT -5 by Stinger