Holley Sniper efi

[ratwing]

My current setup is twin SU's, distributor, timing cover, oil pump etc from a 3.5 RV8 on a 4.6 block and heads. I had the carb needles profiled on a rolling road and although I thought the 'profiling' was crude, just a long flat and a couple of notches filed down them, it did run well.
However, a few years later and it's slowly running worse and on stripping the carbs I saw the needles are worn and scratched as if someone's run a wire brush in an angle grinder up and down them! (presumably the needle jets will also be chewed up)
I couldn't find the answer before and still can't about which needles work and I don't want a full efi system so was looking to change to a Holley/Edelbrock/Weber carb when I came across the Holley Sniper efi system.
It appears a good choice, I can keep my distributor, it's got a built-in ecu and even looks like someone as hopeless as me with computers can get it set up and working properly.
Any thoughts on any of this?

[scudderfish]

They do look intriguing. I know someone who had one on a yank tank and he was happy with it. Not something if you want to nerd out and tweak to your hearts content, but that's not your aim.

[stevieturbo]

As always with this sort of thing.

make sure you can find someone to tune it first.

Make sure you can get good local support when needed.

And if a complete newbie to this sort of thing....make sure the kit is very comprehensive and complete for your specific application.

Failing that, find someone who can install/tune you an efi system and make it work

[ratwing]

Initially this looked ideal, but now I'm changing my mind.
It's not just a case of buying the injector body, there's a manifold, fuel pump, high pressure fuel hoses, throttle and autobox cable linkages and probably other stuff I haven't thought of too.
Apparently it may suffer from some sort of electrical interference from the distributor too (assuming I've understood what's being said) - if I fit one and it doesn't then no worries but what if it does...
Also, I haven't found them from a UK seller and fear I'll be on my own if there is a problem with it so on balance I'll stick with a carb/carbs.

[stevieturbo]

Probably a wise decision.

There are better more proven ways to do things

[ratwing]

Indeed. I considered using a single Weber 38DGMS on an SU carb manifold modified to suit because I've had this setup before on a 3.5 Range Rover and it worked really well but have only just found that the chokes are actually only 27 not 38mm and so have doubts they're big enough for a 4.6?
I'm not convinced about Holley carbs, they appear tricky to tune and who thought joints below the fuel level would be a good idea so a Weber/Edelbrock 500 kit is looking like the best option now.

[ASC28]

I installed the Sniper 2 and I’ve started to learn how to tune it. It makes the Edelbrock AVS2 I had on it before look very ancient in comparison.