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> 1.8 L-Jet to 2.0 L-Jet. Any advice?
mapguy
post Oct 24 2014, 10:09 PM
Post #1


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Howdy,

I have just torn down a bone stock '74 1.8 L-Jet from another 914 with plans to build it back to stock. Plan is to drive my 914 with this engine while I build the original 2.0 the way I want it. I get experience building my first type 4, and get my teener back where it belongs. On the road.

I have the parts available to swap out the crank, rods, and P/C from a '76 2.0 to make it a 2.0 L-Jet. I'm very tempted to do this, as I rarely turn down cheap horsepower! No replacement for displacement, right?

Any land mines I should look out for? Main concern for me is the stock L-Jet system. I understand I might have to tune the MAF for the extra displacement, but I can't find anything discouraging me otherwise. I found an article that details a 3-step process for MAF tuning, but am too lazy to look up the link. Do tell if you know something I don't.

More details:

As implied, stock '74 L-Jet system
Stock '74 1.8 heads (41x34, I believe)
web cam 142/lifters
necessary machine work
Cylinders honed and new rings (I have a set of 94s in excellent condition)
Full re-seal on engine and all peripherals
New fuel lines, vacuum lines, etc etc...

One other thing, I haven't built many engines, but all the ones I've been involved in pop through the intake when first firing them off, and one in particular did it several times before finally lighting off (my old bus engine was a PITA to get running first time). Won't this be dangerous for the MAF on first start? All my experience is with carbed engines. Does this just not happen on FI engines?

Any advice is greatly appreciated.
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Posts in this topic
mapguy   1.8 L-Jet to 2.0 L-Jet. Any advice?   Oct 24 2014, 10:09 PM
mapguy   One thing to add: My cocktail napkin compression ...   Oct 24 2014, 11:52 PM
ClayPerrine   I have already done this. It works fine. I have ...   Oct 25 2014, 06:43 AM
type47   There is a bus throttle body that is a bolt on re...   Oct 29 2014, 08:17 AM
ClayPerrine   Make sure you static time the ignition to prevent ...   Oct 25 2014, 06:48 AM
type47   Set the engine on the timing mark for 7.5 degree...   Oct 25 2014, 09:45 AM
pilothyer   Set the engine on the timing mark for 7.5 degre...   Oct 25 2014, 12:25 PM
Dave_Darling   Is the 142 a hydro cam? I'd stick with solid ...   Oct 25 2014, 07:17 AM
914Sixer   Clay is right about the 2.0 bus set up. Go to the...   Oct 25 2014, 07:18 AM
mapguy   Thanks all!! According to the Web Cam s...   Oct 25 2014, 09:21 AM
mapguy   Don't the 2.0 bus heads have much smaller va...   Oct 25 2014, 09:40 AM
type47   OK. So theoretically you could time a D-Jet motor ...   Oct 25 2014, 02:37 PM
revhi109   I am also running 2.0 Cylinders with 1.8 heads. No...   Oct 29 2014, 07:24 AM
MrKona   I am also running 2.0 Cylinders with 1.8 heads. N...   Nov 1 2014, 07:01 PM
Root_Werks   I converted a 2.0 with carbs to L-Jet, the thread ...   Oct 30 2014, 08:30 AM
Marty Yeoman   I thought the TPS is a binary switch, only activat...   Nov 1 2014, 07:52 PM
MrKona   I thought the TPS is a binary switch, only activa...   Nov 1 2014, 08:52 PM
MrKona   Of course, I could solve the entire issue by makin...   Nov 1 2014, 09:10 PM
ClayPerrine   The L-Jet throttle body has a throttle position sw...   Nov 2 2014, 06:13 AM
MrKona   I ended up lengthening the recess to fit the Vanag...   Nov 2 2014, 09:37 PM
Geezer914   Perfect timing. I am planning to build a 2056 usi...   Nov 2 2014, 09:41 PM
bigkensteele   I too am planning on running the L-jet from my 1.8...   Nov 3 2014, 07:53 PM
revhi109   So I am running injection with 2.0 cylinders with ...   Nov 6 2014, 09:54 AM


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