Replacing 2.0 Plenum, Drop or No Drop Engine |
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Replacing 2.0 Plenum, Drop or No Drop Engine |
BeatNavy |
Nov 20 2021, 01:44 PM
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#1
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Certified Professional Scapegoat Group: Members Posts: 2,933 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
I want to swap my current 2.0 late plenum with an early 2.0 plenum and the larger diameter inlets (trying to get more air to my Raby cam on cold start). I'm sure it's possible to do this in the car, but how big of a PITA is it? I can't recall off the top of my head if you need to remove or loosen the L/R cylinder tin in order to get the plenum off.
I know I'll have to loosen up the intake runners, and negotiating the old one off of those and the new one back on is sometimes finicky, even with the engine out. I'm pretty decent dropping the engine, but what's the quickest way here (or, the path of least resistance (IMG:style_emoticons/default/smile.gif) )? |
BeatNavy |
Nov 20 2021, 06:46 PM
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#2
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Certified Professional Scapegoat Group: Members Posts: 2,933 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
I currently have the late plenum (on the left). I have a idle air control (IAC) valve off Hyundai Sonata (I think), that's connected to one of those vacuum connections. I just purchased a BMW 325i IAC that is significantly larger than the Sonata IAC (in fact it's huge in comparison). I've tested it, and it helped, but now I'm convinced the restriction is simply the size of that vacuum inlet. I want to try the BMW IAC with the larger vacuum inlet to see if I can get enough air for an off-pedal cold start and solid idle.
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