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.... |
Mueller |
Dec 18 2004, 01:31 PM
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#102
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
QUOTE(SirAndy @ Dec 18 2004, 01:33 AM) QUOTE(Mueller @ Dec 17 2004, 09:27 PM) read 'em all and now I'm on eBay (IMG:style_emoticons/default/smile.gif) trust me, you want a single TB ... (IMG:style_emoticons/default/wink.gif) Andy why??? some of the new BMW's use what appears to be a combination of both, individual throttle bodies just a few inches away from the intake ports, but all of the t/b share a common plenum for the air? Brett, I think the best choice for the throttle body would be something from a newer car that has aftermarket support for....I've noticed on eBay, a bunch of Ford Mustang and Focus throttle bodies, both stock and aftermarket such as BBK Now about the placement of the throttle body if going with a plenum design??? cross off how the 1.7/1.8s are mounted......the 2.0 seems like it would be ideal for even flow, but it sure as hell looks goofy with the t/b just sitting up on top.....having the intake on the underside of the plenum similar to 928s (and even some Cosworth Indy motors) is an option, but you have to worry about clearance between the motor and the t/b...also there might be an issue with heat and also the overall height of the plenum would have to be higher for the t/b and aircleaner/ducting now we go back to the intake that Andy posted, do we want 2 seperate plenums connected together with the t/b in the middle or make one single plenum with the t/b mounted to it (top like 2.0 or front, similar to a newer GM V8)?? |