Replacing Ljet with 1.7L Djet on ‘74 1.8L, Ljet in pieces (literally) and have full djet Options

[CSoso]

Hey everyone!

Please don’t roast me if this has been asked before. I spent several hours searching the site… But if it has, a link(s) to any thread(s) would be appreciated…

I have a ‘74 1.8L barn find - sitting 10-ish years due to FI issues. The flapper box is definitely tango uniform and literally in 4+ pieces. Other parts have been removed and am sorting through the rats nest of hoses and pieces. The entire system is in question and I really don’t want to try to find hard to find parts.

The engine was only a quart low and amazingly had very few leaks. The odometer shows 15k miles (115k according to PO). After pulling the engine, I put a ratchet on it (after oiling, etc) and compression “feels” good with no grinding, squealing or grit feel. Will be checking compression officially shortly. The engine’s rebuild history is unknown, so am doing a thorough check. If there’s any hint that it needs rebuilt, it will become a 2056 with microsquirt. If it’s useable as is, I’d like to use parts I have to get her on the road - namely a djet FI system. I would then run her (her name’s Saphira) with the 1.8L until I get a 2056 built. As it’s been said many times here - a 914 going down the road is always faster than one on jack stands!

I have a full ‘73 1.7L djet system and most (missing mps) of a 76 2.0L djet system. I would get a new harness for either djet and rebuild the mps. Assuming I get whichever djet system refurbished, is it a simple remove ljet and replace with djet (distributor too)? Or will the different compression/displacement of the 1.8L cause issues? Any electrical connection issues to the rest of the car? I really appreciate this community and everyone’s helpfulness! Any hints, tips or suggestions are appreciated!

Cheers!

[JeffBowlsby]

Both the DJet and L-Jet are plug N play as long as the systems are complete and functional. If using the 1.7L DJet, you may need to tweak it for a 1.8L displacement application - such as increase fuel pressure slightly

LJet is a solid and reliable FI system as has been described. It is the original FI system for a 1974 1.8L 914 and I would consider it a primitive FI system. Parts are available though not 100% cerain about Fuel Injection Corp anymore - one of their main techs passed away recently and you should check with them for specific items. It delivers fuel as needed, where needed - well manintained, its great. Every part is available or substitues such as the 123 dizzy can be used. The 1.8L FI harness is $908. because it is much more complicated than a D-Jet FI harness.

DJet is a solid and reliable FI system and one generation more primitive than LJet - a fact yes, but is that important no. Original FI to all 914s, except the 74-75 1.8L cars. It delivers fuel as needed, where needed - well manintained, its great. Every part is available or substitues such as the 123 dizzy can be used. The 1.7L DJet FI harness is $556. and only fits a 1.7L 914 (same price for a 2.0L 914 DJet harness). If you were to source a complete 2.0L FI system, hardware, new harness and everything, it can be used on your future 2056. Cannot say that for the 1.7L or 1.8L setup.

Not a microsquirt fan for the everyday 914 owner, because it is not a plug N play FI solution. Unless you are exceptionally skilled with custom fabrication, electronics and software and have significant hours available to design and build a harness, and adapt the system to your car, we will look for your car for sale in about 10 years after it being on jackstands all that time, after numeous unsuccessful frustrating attempts to make the MS work.

[BeatNavy]

Not a microsquirt fan for the everyday 914 owner, because it is not a plug N play FI solution. Unless you are exceptionally skilled with custom fabrication, electronics and software and have significant hours available to design and build a harness, and adapt the system to your car, we will look for your car for sale in about 10 years after it being on jackstands all that time, after numeous unsuccessful frustrating attempts to make the MS work.

Jeff, I hate it when you beat around da' bush. Please tell us how you really feel (IMG:style_emoticons/default/smile.gif)

To the OP, there are a number of us here running MS. I think Jeff overstates the difficulty given that there is a large knowledge base, both in general as well as with a type IV, and there are plug and play components for sale from the Dub Shop and others. It's not for everyone, and stock FI is a great option, but some us also LIKE the process of figuring this stuff out.

Just wanted to give another perspective.