Quote:
Originally Posted by NitrousG35
No, he said 210 hp in his post. Maybe he meant $, but he said hp.
Jeremy, the temp differential is just one reason that an enclosed airbox that is ducted to fresh air is superior to any SRI or CAI. All research going back to Chevrolet in the 1960's and continuing to today shows that for every 10 degree drop in temp inside the airbox, there is a corresponding 2 hp gain.
I have read many articles about enclosed airboxes on a 90 degree day showing a 40-60 temperature difference. This is why I am going with the CRV airbox for the cowl induction.
The other issue has to do with the greater air density of air that is rammed or pressurized. That along with the greater air velocity will make hp over any tube with an exposed air filter in a hot engine bay.
In a way, you could say that there may be a 1-2 hp drop for every 10 degrees hotter in the engine bay. Thus, you could end up with a zero net gain or worse, a decrease in hp on a really hot day. The key to performance is isolating parts from excessive heat. That is why people used TB spacers. You will notice at drag strips that intake manifolds are packed with dry ice or ice cubes to reduce the temperature and bring denser air into the motor which increases hp.
One more thing: you can't dyno a system with ram air. No weedblower or large fan will ever simulate the effects of air pressure and velocity on an intake system at speed. A dyno reading may show a SRI or CAI to be similar to the Gruppe M or T1R, but a road test will clearly differentiate the systems. Using a G-tech or MSD Dashhawk should show the differential.
Jeremy, read this about the effects of air temperature on performance:
Cowl induction for cold, ram air for the Si?
Cold Air Induction on a 1979 Z28 Camaro (Part 1) - SMOKEmUP.com
Home Page
http://www.psmdiesel.com/air_intake94.php
The Intake Cycle Part One |
I understand what you're saying, however I've not seen results showing that what you're talking about making more power. I've tried to find things to make more power than the injen and just couldn't do it, so if you can't beat em, join em.
Something else; all I would have to do is cut a hole where the foglights go on the coupe and I would have fresh air hitting the filter while moving forward. May not be ram air, but it will still be nice.