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Injection advice
r1_pete - 2/4/10 at 09:16 AM

I'm thinking of fuel injecting the 4.2 straight six engine in my e type.

I could use itb's or jenveys, but was thinking a bit more locost.

If I used a manifold like the one in the picture, drilled and welded injector inlets to each runner, then used two, preferably 3 if I can get a triple carb manifold, Focus / Mondeo throttle bodies, would it work / be worth it?

I know some clever stuff has been done on here with injection, so any advice welcome. Rescued attachment Manifold1.jpg
Rescued attachment Manifold1.jpg


Mark Allanson - 2/4/10 at 09:35 AM

Couldn't you just lift the whole injection system off a XJ6 or similar, would save £££'s and hours of tribulations


r1_pete - 2/4/10 at 10:16 AM

Yes I thought about that, but this is the old XK engine, not sure the later straight 6 manifolds woild fit.


matt_gsxr - 2/4/10 at 10:34 AM

2 sets of gsxr600 TB's (maybe £60 a set) would bolt up nicely and cost a lot lot lot less than Jenveys. You'd have to respace, but that isn't difficult, and then make up a fuel rail (also easy, although the rail might cost £30).

This will look awesome.

Matt


britishtrident - 2/4/10 at 11:01 AM

quote:
Originally posted by r1_pete
Yes I thought about that, but this is the old XK engine, not sure the later straight 6 manifolds woild fit.



Mk III version of the original JX6 had a fuel injected XK engine, I think it used the Lucas "Hotwire" system which I know can work very well. From experience of that system on Rover models I know the ECU for that system was self contained a separated from inputs from the cars electrical system, so it should be possible to transplant it and the electronic ignition.


Mark Allanson - 2/4/10 at 11:34 AM

quote:
Originally posted by r1_pete
Yes I thought about that, but this is the old XK engine, not sure the later straight 6 manifolds woild fit.


Boggle could make up plates to match the manifold and the head, you would just need to weld the connecting tubes.


mark chandler - 2/4/10 at 11:47 AM

Late 4.2 had Lucas flappy box EFI, not an issue as you lose the flappy bit and megasquirt.

Or make up a manifold the two sets of triumph triple TB's is the way to go as they are super cheap and sized for a 900cc bike engine.

Regards Mark


matt_gsxr - 3/4/10 at 08:55 AM

Good thought on using triples I assume they are respaceable.

A problem with gsxr600 is that the tps is on the opposite end to the cable control. You can get a bit of wind-up through all the linkages even with 4 TB's so with 6 it would only be worse.

I guess the problem with triples is that you need some kind of splitting of the cable control.

Lots of options

Matt