L-Jet on 2.0 Liter, Is it an Easy Swap? |
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L-Jet on 2.0 Liter, Is it an Easy Swap? |
motorvated |
Jun 24 2019, 11:28 AM
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#1
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Member Group: Members Posts: 279 Joined: 13-February 13 From: Colorado Member No.: 15,519 Region Association: Rocky Mountains |
Currently I have a '75 1.8 Liter with L-Jet FI in my car that has been performing well. I recently purchased a '74 2.0 Liter (4 cylinder GA) motor that came with dual Weber 40 IDF carbs. I have not yet determined if the cam in the 2.0 Liter motor has been switched out with one that is suited to the carburetors. If I find an original FI compatible cam inside, I might want to consider swapping over the L-Jet from the 1.8 Liter to the 2.0 Liter and selling the dual Webers. So my question is how simple is it to swap the L-Jet over from the 1.8 Liter to the 2.0 Liter motor. I'm sure this has already been addressed in the forum, but my various searches came up with nothing. I'm thinking that I'll need 2.0 Liter manifolds and possibly 2.0 Liter injectors and that everything else might just come over and bolt on. Any and all advice welcome.
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ChrisFoley |
Jun 24 2019, 11:33 AM
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#2
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I am Tangerine Racing Group: Members Posts: 7,922 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None |
You need the 2 liter runners to match the heads. They won't line up right with the L-Jet plenum but can be connected with the proper diameter Silicone tubing instead of the stock hoses.
D-Jet injectors don't work with L-Jet. |
914werke |
Jun 24 2019, 12:14 PM
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#3
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"I got blisters on me fingers" Group: Members Posts: 10,039 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
(IMG:style_emoticons/default/agree.gif) You pretty much need the 3 bolt manifolds from the 2.0 D-jet system (HERE) & the entire L-jet kit from the 1.8L (sans its manifolds) including its injectors (IMG:style_emoticons/default/smile.gif)
The flow rate for those is withing the envelope of the stock 2.0L Dan Root did this conversion on his a few yrs back and was a pretty respectable runner! |
JeffBowlsby |
Jun 24 2019, 12:21 PM
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#4
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914 Wiring Harnesses Group: Members Posts: 8,490 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
So why not source and install the correct 2.0L injection? Lots of reasons why this is the best approach.
Sounds quick and easy to slap on what you already have, but why create a Franken-motor? |
motorvated |
Jun 24 2019, 12:40 PM
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#5
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Member Group: Members Posts: 279 Joined: 13-February 13 From: Colorado Member No.: 15,519 Region Association: Rocky Mountains |
So why not source and install the correct 2.0L injection? Lots of reasons why this is the best approach. Sounds quick and easy to slap on what you already have, but why create a Franken-motor? It's a race car that's already a "FrankenCar", 1972 car with a Chalon body and a '75 1.8 L-Jet now. Might be nice not to have to re-jet carbs when I race at different elevations. In my opinion, the L-Jet is way simpler to set up and troubleshoot than the D-Jet, and I already have the L-Jet. I could sell the Webers and use the money to buy a nice new FI harness for the L-Jet and then it would be solid as a rock. It all depends on what cam is in the 2.0 Liter. Thanks for all the input. |
brant |
Jun 24 2019, 12:46 PM
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#6
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914 Wizard Group: Members Posts: 11,619 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
a big race cam and carbs will make more power... as long as your there......
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74 sunflower 914 |
Jun 24 2019, 01:57 PM
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#7
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Newbie Group: Members Posts: 25 Joined: 25-August 08 From: Bonsall, CA Member No.: 9,460 Region Association: Southwest Region |
As the car was originally an L-jet, and if the wiring plug ins, double relay, etc. are still intact for that, it's probably easiest to stick with L-jet. That is what I did when I had my 1.8L motor swapped to a 2056 motor using the 2.0L runner setup above and it works great. It is also fairly easy to adjust the Air Fuel Meter for the increased displacement, especially if you have an air/fuel ratio gauge or the plx multigauge one that works with a smart phone (thanks for the tip on that I found on this site). Here are good instructions that explain L-jet AFM adjustment for even a non-mechanic like myself https://www.itinerant-air-cooled.com/viewto...f=50&t=7761 and will get you close to the correct settings. Some people on this site have also increased the size of the throttle value for performance increases and there are threads on that.
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Mark Henry |
Jun 24 2019, 02:00 PM
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#8
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
BTDT it works good.
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914werke |
Jun 24 2019, 04:15 PM
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#9
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"I got blisters on me fingers" Group: Members Posts: 10,039 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
So why not source and install the correct 2.0L injection? Lots of reasons why this is the best approach. Sounds quick and easy to slap on what you already have, but why create a Franken-motor? While I tend to agree with you Jeff its his car he already has the L-jet kit and Franken-motor is a little harsh considering the 912E (IMG:style_emoticons/default/smile.gif) |
ClayPerrine |
Jun 24 2019, 08:32 PM
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#10
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Life's been good to me so far..... Group: Admin Posts: 15,436 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
L-Jet is a good fit for a 2.0L. Done it multiple times, as the spare motor for Betty's car is the 2.0L that was originally in my car.
Get some injectors from a 280ZX. They are the same as the 912E injector, and work great with a modified engine under the L-Jet system. If you are keeping it long term, put a bigger VW bus throttle body on it too. The extra airflow will wake up the engine. Good luck. |
Root_Werks |
Jun 25 2019, 01:20 PM
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#11
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Village Idiot Group: Members Posts: 8,315 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest |
I liked L-Jet on the 2.0.
Conversion starts around page 8: http://www.914world.com/bbs2/index.php?sho...4990&st=140 |
jim_hoyland |
Jun 25 2019, 06:37 PM
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#12
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Get that VIN ? Group: Members Posts: 9,271 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
Definitely try to source the Vanagon throttle body, they came in two sizes, get the bigger one. I found them on both eBay and The Samba. It’s a direct fit and, there’s a thread on this in the garage
See: https://www.gowesty.com/product/electrical/...-throttle-body- Attached image(s) |
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