![]() |
|
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. |
|
![]() ![]() |
![]() |
BeatNavy |
![]()
Post
#1
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 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) )? |
JeffBowlsby |
![]()
Post
#2
|
914 Wiring Harnesses ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 8,549 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None ![]() ![]() |
In car, no problem.
|
rjames |
![]()
Post
#3
|
I'm made of metal ![]() ![]() ![]() ![]() Group: Members Posts: 3,974 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest ![]() ![]() |
It’s not hard at all. The tin pieces don’t need to be removed. Cut the intake to plenum hoses for easier removal and replace with new ones.
If your plenum is in good shape and you want to sell, let me know as I may be interested in buying. |
BeatNavy |
![]()
Post
#4
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region ![]() ![]() |
Thanks, Jeff, Robert. That sounds like a plan then -- swap with engine in. Glad there are no hidden gotchas.
Robert, I'll look around to see what my "inventory" is on plenums. I may have a spare (perhaps this one)! Thanks, fellas. |
emerygt350 |
![]()
Post
#5
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,154 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States ![]() |
How on earth do you unbolt it? I could not figure it out when I was worried there might be bad seams.
|
914werke |
![]()
Post
#6
|
"I got blisters on me fingers" ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 10,157 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest ![]() ![]() |
Im confused about what you are trying to accomplish?
While there are differences in early to late 2.0L plenums the dia. of the inlets isnt one of them? In any event check each of those units carefully... ask me how I know. (IMG:style_emoticons/default/dry.gif) Attached thumbnail(s) ![]() |
BeatNavy |
![]()
Post
#7
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region ![]() ![]() |
|
914werke |
![]()
Post
#8
|
"I got blisters on me fingers" ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 10,157 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest ![]() ![]() |
...and a bolt on back spine of the case.
|
emerygt350 |
![]()
Post
#9
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,154 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States ![]() |
Exactly, where are those screws? Down those holes?
|
BeatNavy |
![]()
Post
#10
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region ![]() ![]() |
Im confused about what you are trying to accomplish? While there are differences in early to late 2.0L plenums the dia. of the inlets isnt one of them? I'm pretty sure the 2.0 plenum has differences in inlet size -- the two nearest the dizzy. The early one has larger inlets than later ones. I've got both, unless I'm missing something. Late on the left, early on the right. I think. (IMG:http://www.914world.com/bbs2/uploads/post-5834-1579561117_thumb.jpg) |
914werke |
![]()
Post
#11
|
"I got blisters on me fingers" ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 10,157 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest ![]() ![]() |
Ah! the vacuum ports. not the intake...gotcha
|
BeatNavy |
![]()
Post
#12
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region ![]() ![]() |
|
Montreal914 |
![]()
Post
#13
|
Senior Member ![]() ![]() ![]() Group: Members Posts: 1,594 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California ![]() ![]() |
...and how are you planning on using those larger vacuum ports to improve your colds start? (IMG:style_emoticons/default/popcorn[1].gif)
|
emerygt350 |
![]()
Post
#14
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,154 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States ![]() |
More air? Until I started working on a djet... I never would have said that.
|
BeatNavy |
![]()
Post
#15
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 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.
|
Montreal914 |
![]()
Post
#16
|
Senior Member ![]() ![]() ![]() Group: Members Posts: 1,594 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California ![]() ![]() |
Thank you for the explanation. Please share results and setup after you try it. I believe I bought a BMW unit too for my build but I am very far from getting all of this running... (IMG:style_emoticons/default/rolleyes.gif)
Good luck, I hope this will solve your problem. (IMG:style_emoticons/default/beerchug.gif) |
BeatNavy |
![]()
Post
#17
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region ![]() ![]() |
Ok, got the plenum swapped and I think it's a winner. Potentially. The car started strong dead cold and idle immediately went to 1200 or 1300. I do need to make sure I don't have any other vacuum leaks I created when I did this (I reused the TB gasket and MAP sensor gasket -- I know, terrible!). I had tried everything I could think of to get a solid cold start including manipulating mixture, cold advance timing, and of course IAC settings. EDIT, I even drilled a small hole in the throttle body plate to allow more air to bleed through (as per Jake's recommendation on another thread relevant to the 9950 cam).
Now I need to completely go over my idle tune though. Except for cold starts, the other IAC and tune were working well, and I had closed loop doing it's job. Now I need to completely redo that (IMG:style_emoticons/default/smile.gif) Swapping the plenum with the engine in car wasn't too bad. Funny, the parts I thought would be hard, like getting the intake runners on and off, was pretty straightforward. I think I spent most of my time trying to get the darn tin screws back in. |
rhodyguy |
![]()
Post
#18
|
Chimp Sanctuary NW. Check it out. ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 22,098 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch ![]() |
Is this the 2258 listed in your sig?
|
rhodyguy |
![]()
Post
#19
|
Chimp Sanctuary NW. Check it out. ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 22,098 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch ![]() |
Is this the 2258 listed in your sig?
|
BeatNavy |
![]()
Post
#20
|
Certified Professional Scapegoat ![]() ![]() ![]() ![]() Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region ![]() ![]() |
|
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 17th June 2024 - 04:13 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |