Nick Less air flow at low RPM due to airbox restriction won't make more torque. The way to make more torque at low RPM is to increase the air velocity, which requires smaller intake manifold, ports and valves, all of which restrict airflow at high RPM and hurt top end power. Essentially you get a ram air effect tuned for low RPM.
Restricting the airbox is the same as putting an orifice plate in the intake. This will give you a pressure drop due to the decrease in air flow. This will decrease the charge pressure in the cylinder (because there's less of it) which has about the same effect as reducing the compression. What you can do is have two different size intake runners & valves, a small one and a big one. They work like the old spread bore 4 barrel carbs - small primary and huge secondary. This is part of the Caddy Northstar design. If you could combine this with variable valve timing you'd have what you want. Best hope is electronic valve actuation - which is being studied (for the last 15 years) but hasn't made it into production. Bill -----Original Message----- From: GTS-1000 Owners List [mailto:[EMAIL PROTECTED]] On Behalf Of nicholas.threader Sent: Sunday, December 22, 2002 5:02 PM To: [EMAIL PROTECTED] Subject: Airbox mods Hi all , Has anyone altered their standard airbox to flow slightly more air , i've used S&B filters for some time but they seem to flow a bit too much air in low to mid-range , so i've switched back to the standard box , now my bike feels like it could do with a bit more air from mid-range up . Maybe a tuneable airbox ? less flow at low rev's to give torque and more flow at high rev's to give power , am i barking up the right tree with my way of thinking ? I'm looking at altering the 2 rubber intakes that are stuck on the sides of the airbox . atb Nick T Happy Christmas to one and all . --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.431 / Virus Database: 242 - Release Date: 17/12/2002
