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> L-jet on a 1.7 / 1.9
Literati914
post Mar 3 2026, 10:59 AM
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I've been kicking around what to do with the stock 1.7L, w/single progressive carb engine that came with the car that I've been messing with lately. Car's not been started since I got it, though I did hit the starter a couple of times and it sounded promising (dirty old fuel, tank, carb and fuel lines need attention). Anyway, I don't want to keep the single progressive carb for very long and was thinking of eventually getting dual webers or repros. But I've been offered an L-jet system from a 1.8L, for a good price and had some questions.

-Will it work with the stock 1.7L distributor?

-I've heard that it might run rich on a 1.7, and this offer does not include injectors - would just going with a set of stock 1.7 injectors eliminate that tendency and be the best bet?

-Also, I've had a brand new set of 96mm P/C's for 1.7 case in storage for a few years now.. I guess I could slap those on while I have the engine out for some engine bay touch up. Like I've mentioned in another thread, I hope to not have to split the case tbh. Would you guys bother and would this change which distributor and injectors you'd go with?
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Literati914
post Mar 3 2026, 02:42 PM
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QUOTE(brant @ Mar 3 2026, 12:01 PM) *

The L jet and D jet parts don't interchange. The Djet is fired from the distributor and the L jet is not. you could run a 1.7/1.9 on either induction system, but think you need all of the components for that system to match (computer, distributor, mps, or flapper box)


Yes, I assumed the D-jet and L-jet parts would not interchange. The offer includes the flapper box, computer, harness, etc. Ok so I guess it makes since for the distributor to be specific to the L-jet system.. the why of 1.7L injectors not working with the system in a 1.7L car is confusing to me (unless the elec. connectors are different). But that kinda makes no difference at this point since injectors would have to be purchased either way (I was only thinking of using 1.7 injector because in theory the volume would be better than the L-jet's 1.8 injectors). Then again, it may become a 1.9L, so. I understand L-jet is somewhat tunable in regards to A/F anyway, correct?

Also, if I'm not mistaken L-jet has no MPS, is that right? Does it have an AAR or anything else like D-jet has?
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