I learn something almost every day on this list. I love that! Merry Christmas to all you celebrants thereof! Tom --- wghalley <[EMAIL PROTECTED]> wrote: > 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
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