View Full Version : Billet Stacks
11-03-2002, 08:04 AM
Just put the forums billet stacks in my Falco. My ass dyno is telling me I'm getting more pull to the top. Nice quality item and easy to install. At 39.95 its worth the 2 HP.
11-03-2002, 10:55 AM
billet stacks? ohh those are new
11-03-2002, 07:48 PM
Are you referring to the ones made by Evoluzione?
11-03-2002, 09:38 PM
Yes, the velocity stacks found in the forum. They work!
11-03-2002, 10:05 PM
I might have to check them out :)
Anyone have any input in how these will work with the rene air kit??
11-05-2002, 09:07 AM
My educated guess would be, "Great!". The rene kit opens up the velocity stacks to all the air they can suck in, and I would have to say smoothing out that air would have a dramatice effect. My .02 without the expense of actually buying the stacks... :D
11-05-2002, 09:29 AM
Just looking at the difference from stock to the billet stacks it is evident that the billet stacks will allow more air in more freely. Why? The billet one's are much shorter than the stock set up. It appears the air can pull easier. In addition the diameter of the billet stacks are a touch larger than the stock one's. This set up is supposed to add 1 or 2 hp for $39.95 not bad!
11-05-2002, 08:38 PM
I am wondering if there will be much trade-off at lower RPMs with these. The idea behind velocity stacks is to create, well, velocity! That's traditionally done by using a little length to get the charge moving, helping low end and mid-range torque. The narrower the orifice (no comments please), the faster the charge moves at a given volume (think of different diameter drinking straws). The shorter, larger opening may increase maximum airflow, but at the expense of some midrange velocity.
Anyway, they sure look cool! Besides that, the Falco has such a strong midrange, it could actually afford a minor loss there. I should be getting mine in just a few days so stay tuned for a full (moon) butt-dyno report!
11-05-2002, 11:50 PM
they're modled after the aprilia stacks that come with the airbox kit I think, so it's not like they've just pulled the design out of their ass, I'm sure they work as intended :)
11-06-2002, 05:58 PM
The Evo stacks shouldnt be used with the Rene air kit. Jorge dynoed the shorter stacks and they are not effective with that style of airkit. Stay with the standard stacks.
With a sealed airbox as with the standard box or the Evo race airbox, the shorter stacks do add top end Hp, and they dont lose hp in the midrange according to Ken Zeller from Evoluzione.
Hope that helps
11-07-2002, 09:52 AM
Thats funny but they are listed for $59.95 now.
11-07-2002, 11:40 AM
you are correct - the introductory price was $39.99 but the offer is over and we have changed it back to the regular price of $59.99.
11-08-2002, 07:36 AM
Awww c'mon Ken, $60? Where's the love?
Actually I have a somewhat related question... I was looking at getting a dyno for a day with my friends and while I had the day, buying Ken's handy dandy throttle body sync tool and seeing about how well they are aligned. Does anyone have any input? Is it worth the work on a bike that just had a full tune up/service 2,000 miles ago?
11-10-2002, 12:13 AM
hehe no kididng, at 30 bucks I was considering them, 60.. eh nope.
11-10-2002, 06:51 AM
Factory Pro wanted $180 for the velocity stacks for my R6. Ken is cheap at $60...
11-11-2002, 05:55 AM
re: FP, isn't that still only $45 per stack? but dang, missed the sale already, we need some warning like downtown "sale ends ___" or something. how come it ended before the holiday weekend was over? wahhhhh!
11-11-2002, 09:15 AM
Anybody know what is the lenght of SP billet stacks compared with standard ones?
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.