L-jet adjustment, Anyone seen this article? |
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L-jet adjustment, Anyone seen this article? |
Black22 |
Aug 16 2012, 04:06 PM
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#1
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Senior Member Group: Members Posts: 886 Joined: 1-November 07 From: Creswell, OR Member No.: 8,290 Region Association: Pacific Northwest |
I found this while searching the net. Very comprehensive and answered all my questions considering most everyone here deals with D-jet. Has anyone ever seen this or is this old news?
http://www.itinerant-air-cooled.com/viewtopic.php?t=7761 I hope this works. I've never added a link before! |
Drums66 |
Aug 16 2012, 04:18 PM
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#2
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914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
......looks good Black22, never seen that 1......I've only had 1 D-jet car in all
the decades of my 914 life....I prefer Ljet(10 914's posessed) |
Als914 |
Aug 16 2012, 05:12 PM
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#3
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Lighting my way Group: Members Posts: 330 Joined: 1-January 06 From: Hemet,Ca. Member No.: 5,346 Region Association: Southern California |
I used that same info to adjust my air flow meter with some great results, i.e better off the line performance, RPM performance. Now I just need to add the Mallory distributor from CFR.
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timothy_nd28 |
Aug 16 2012, 05:25 PM
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#4
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest |
That article should be pinned or stickied to the classic section! Thanks for finding this. (IMG:style_emoticons/default/driving.gif)
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Black22 |
Aug 16 2012, 06:14 PM
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#5
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Senior Member Group: Members Posts: 886 Joined: 1-November 07 From: Creswell, OR Member No.: 8,290 Region Association: Pacific Northwest |
That article should be pinned or stickied to the classic section! Thanks for finding this. (IMG:style_emoticons/default/driving.gif) I wanted to see if it was new/ good info and then was going to PM the link to you Tim. Glad you saw it! |
echocanyons |
Aug 16 2012, 08:35 PM
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#6
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Advanced Member Group: Benefactors Posts: 2,094 Joined: 24-December 02 From: Bay Area, CA Member No.: 7 Region Association: Central California |
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Valy |
Aug 16 2012, 10:45 PM
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#7
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Senior Member Group: Members Posts: 1,677 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
Good article, used it in the past.
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jim_hoyland |
Aug 17 2012, 09:49 AM
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#8
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Get that VIN ? Group: Members Posts: 9,321 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
Couple of years ago I checked out a modified 1.8 ( now for sale in the classifieds) that had just installed the Tangerine exhaust. This car had some added pep; the owner sent me the following email explaining the mods he did. I did drive the car and can verify the changes made a difference:
" Here is the link the owner referenced, and his modifications ( in quotes) : http://www.opeltuners.com, then select articles Engine Tuning injection specs; About Opel FI system "The 1975 914 uses the L Jetronic system. It is the best of all the injection systems used in the 70’s and 80’s. You will find the L system on Opals, Range Rovers, Porsche 911’s, BMW and others. You may also use parts off these cars if the pins are the same for the airbox. You can also use the throttle body off these cars if the pins are the same. In the articles from opeltuners, you will notice that a small change in throttle body and airbox means a large change in available horsepower. The throttle body that is on the 1.8 is good for 160 hp. Just clean up the rough edges inside the throttle and airbox with a grinder and you will be set. Next step is to increase the fuel flow to the engine. You can do this by larger fuel rails, and lowering the full on timing of the injectors to 3000 RPM. Down from the normal 3500 – 3800 stock setting. I replaced the injectors with stock Bosch; increased the fuel pressure to 43 #; lowered the full on timing of the injectors to 3000RPM. Then I reduced the spring tension in the airbox by a -4clicks and increased the injectors on-time in the lower RPM by one contact slot on the inside dial of the airbox ( inside the tension spring adjuster ) This inside adjuster set the idle to 1000RPM, but made the idle rich so I leaned the low RPM using the bleed screw on the top of the air box. This lets the air by pass the airbox and go directly into the intake after the throttle body, leaning the mixture at low RPM. So, I have increased the airflow through the engine by exhaust and small mods to the sir box; increased the fuel flow at low and high RPM; and leaned the mixture at idle." |
Drums66 |
Aug 17 2012, 06:52 PM
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#9
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914 Rudiments Group: Members Posts: 5,321 Joined: 15-January 03 From: Coronado,Cali Member No.: 151 Region Association: Southwest Region |
......Cool you've did alot of research,trial & error...Jim!, I see you appreciate
that system(Ljet) also..... |
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