 L-jet help #2 |
|
|
|
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. |
|
|
| bd1308 |
 Jan 18 2006, 01:31 PM
Post
#1
|
|
Sir Post-a-lot  Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501  |
so okay...im in the process of putting everything back on that should be on...like head breather stuff and i'm on the crankcase breather right now.
i connect the piping all up, correct stuff with hose clamps. engine idles at like 250 and is obviously running like crap. I open the afm and push the flap more open and tada...it runs better. i do know I have a little more blow-by than I would like but I am very happy with this engine, and tearing it down isnt an option right now. so should I just vent the crankcase to atmosphere (which i REALLY dont like/want to do) or what? I have a new oil filler cap seal installed on it ( the ones from the samba group buy) it seems to fit in this channel thing on the cap istelf, but not at the very top of the cap. what do i do? b |
   |
 
|
  |
Replies
| Mueller |
Jan 18 2006, 01:47 PM
Post
#2
|
|
914 Freak! Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
|
basicly it sounds like the engine is getting too much unmetered air (runnning too lean) which of course it does not like.
On my L-jet, I ended up machining some delrin plugs (2) for the intake boot and ran all the crankcase venting to a puke can for the oil residue....I also had a small hose go from the puke can to the airfilter side of the intake to basicly "recycle" the crankcase air that had the benifit of creating a vac. for the crankcase (not much I'd say) and it helped not releasing too much junk air to the atmosphere. Too much oil in the crankcase air is bad for a few reasons, one it lowers the good clean air available for combustion and two, it adds an oil film to the flapper box and intake track which is not good. do a search on crankcase venting/puke cans (and here and google) and you'll find some good ideas and designs that can be done dirt cheap. The L-jet really rocks when you eliminate the unmetered air...at least it did on 2 of my /4 motors (a 1911 and a 2.0) |
|
|
|
Posts in this topic
bd1308 L-jet help #2 Jan 18 2006, 01:31 PM
r_towle on a stock ljet, where is the crankcase venting co... Jan 18 2006, 01:50 PM Marty Yeoman I second what Mike said.
My car really started run... Jan 18 2006, 01:52 PM bd1308 okay.
well the head ports are there...just not ho... Jan 18 2006, 01:56 PM James Adams Jan 18 2006, 02:01 PM bd1308 the head ports are there, and open....just not plu... Jan 18 2006, 02:03 PM bd1308 if im running lean, what help is adjusting timing ... Jan 18 2006, 02:04 PM rhodyguy look very closely at the intake elbow for cracks/s... Jan 18 2006, 02:06 PM James Adams Jan 18 2006, 02:07 PM James Adams Jan 18 2006, 02:09 PM bd1308 well the thing is that it runs perfect with that o... Jan 18 2006, 02:09 PM James Adams Jan 18 2006, 02:10 PM kwales What head ports on an L-jet?
None on mine. Ther... Jan 18 2006, 02:12 PM Mueller Jan 18 2006, 02:20 PM James Adams Jan 18 2006, 02:22 PM Mueller Jan 18 2006, 02:25 PM bd1308 I understand all of this.
are there special addit... Jan 18 2006, 02:25 PM rhodyguy does your cap have the o-ring that is on the outer... Jan 18 2006, 02:33 PM bd1308 yeah it does, but it looks crushed or old or FUBAR... Jan 18 2006, 02:38 PM
rhodyguy i'll go dig thru the "stuff". oh, figure out w... Jan 18 2006, 02:45 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 1st August 2025 - 12:43 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.