Common plenum or individual runners???, for gas milage and drivability |
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Common plenum or individual runners???, for gas milage and drivability |
Mueller |
Dec 16 2004, 10:04 PM
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#101
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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.... |
ottox914 |
Dec 16 2004, 10:18 PM
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#102
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The glory that once was. Group: Members Posts: 1,302 Joined: 15-December 03 From: Mahtomedi, MN Member No.: 1,438 Region Association: Upper MidWest |
Here is another place to check for FI throttle bodies, manifolds, and injectors: http://redlineweber.com/Redline1.htm
I have been interested in the same question for a while- general answers I get are that the longer runners/larger single plenum can be designed to boost low/mid range torque, while the I/R throttle bodies will help the top end. Might be a "package" sort of decision, thinking about valve sizes, cam, redline, etc. Jake had a thread awhile back about testing intake velocity stacks, and found 2.5" to be the best overall size, so if you go I/R this might be worth keeping in mind. As far as real world experience, got none to share, only opinions at this time. I'm not the smartest nut on the workbench, but am working my way thru "Scientific Design of exhaust and intake systems" third edition, by smith and morrison. It'll take a while for it to all sink in, but interesting none the less. |