well weve been talking about how in theory, GM naturally aspirated 3800 series II (L36) injectors should fit. well here you go.








the L36 injectors are 19.5# injectors, while the V12 are 19#. virtually no difference at all. the L36 nozzles fit quite snug with seemingly no leaks. the injector body is the same and the retaining rings slipped on easily. im gonna browse around the help section and see if i can find quick connect fittings to adapt them to the barbed style rail.

honestly, AC delco parts on a Jaguar can only be good.

i did notice that the L36 nozzle seems to give a much more uniformed spray, and im looking forward to seeing how they work. ive put over 220k on stock L36 injectors without issue before i went supercharged and switched to L67 36# injectors.

 

I can only ask one question...why? The stock injectors are of very high quality. They can be cleaned and repaired. They do cost more than the GM ones but since they rarely if ever go bad why waste the effort? Also realize that spay pattern is important to a smooth running engine. Then you need to find some sort of adapter to connect them to the stock rail which defeats the purpose of fitting these injectors in the first place. If you had a fuel rail that would fit like they do in the GM cars then maybe you have something.

BTW I couldn't help but notice you have hose clamps on your injector hose. There is two problems with your clamps. The first is there should not be clamps on those hoses. The proper hose is an interference fit. Check "The Book" for a write up on it. Second is those style hose clamps are the worst you can use. The worm gear slots cut into the hose further compromising it. If you must use claims then you the EFI style clamps.

 

i didnt do the hose setup. previous owner did.

and obviously there would be no point in replacing perfectly good V12 injectors, would there?

 

You will need to fabricate a new fuel rail. That gets rid of the hoses altogether which is a good thing.

It could also clean up the engine bay and allow you to go to a single adjustable regulator.

The spray pattern on the later injectors is probably better than the ones originally fitted to the Jag. Better atomization and more consistent delivery; not simply a matter of opening and closing.

 

If you go ahead with this keep a record of everything you do and a list of parts/prices. I'm interested to see how well it works.