Common plenum or individual runners???, for gas milage and drivability |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Common plenum or individual runners???, for gas milage and drivability |
Mueller |
Dec 16 2004, 10:04 PM
Post
#101
|
914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
for my 2316 it seems that the stock plenum might be reaching it's limits as far as volume goes.....so, I either fabricate a larger common plenum, or go with individual throttle bodies such as TWM or Jenvey*
single plenum would be easiest, but the individual throttle bodies look better (IMG:style_emoticons/default/smile.gif) has anyone switched from one to the other on the same motor with everything else being the same??? *Jake Raby is the U.S. distributor of these.... |
Brett W |
Dec 19 2004, 01:55 PM
Post
#102
|
Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None |
Mike,
The slide throttles could work fine on a street motor, they would be prohibitivly expensive though. It would work really well with a dual injector setup. I have yet to hear fomr anyone that barrels would work for anything but a constant throttle position like a circle track car. The plenum or lack there of doen't affect the problem of mixture tubulence in the intake tract. It is really bad at part throttle meaning you would have to run extremely rich to possible overcome some of that effect. It is possible that you would have plug fouling issues at street rpm levels. Just use a standard butterfly type throttle. It will be substantially cheaper and easier to work with. Do a google search for Helmholtz resonator. You should find several sites that discuss it, how to calculate it, and it's effect on a NA engine. Carbon fiber or some sort of thermoplastic would be the best option. you could do a double wall aluminum panel on the bottom of the manifold and sandwich some fiberglass between the layers and then coat it for more heat resistance. http://advancedinductionresearch.com/photo_gallery.htm http://www.advancedinductionresearch.com/ http://enaf1.tripod.com/teche.html http://www.n2performance.com/lecture1.shtml http://www.me.psu.edu/me415/SPRING02/intak...ake/intake.html http://www.grapeaperacing.com/GrapeApeRaci...tionsystems.pdf |