Thread: High Comp 4.6 Straight Gas. What to use to return to straight fuel

Or the Fitech

Holley seems to have less hassles than fitech. Like the dash and self learning of this over 14cux with nooxygen sensor stepper motors etc

Thanks for that detailed post, Mercguy. You've pretty much answered every question I ever had on changing to EFI, which I'm not likely to do!

Most of that American throttle body stuff looks pretty good, but it is meant for American usage and I wonder about how it would go on the usual extended corrugations and so we have up here. My biggest concern with anything electronic on an engine is the ultimate "what if it doesn't start?" test. My CD175 carburettors did this to me in Pt Hedland last year but I was able to sort it out pretty easily. The upgrade from these will be SUs.

mate has done his 4.6 Haltech allhimself about 4k

On my 3.5 Rover V8 car I went from factory Strombergs to twin SUs (much better) then to a four barrel (Edelbrock) when I put in a 4.6. I've fitted a wideband sensor and AEM gauge so the air fuel mixture can be trimmed easily at all points in the rev range with a slight
turning of the idle screws or swapping jets and needles around (on the Edlebrock this takes only a few minutes to do). It starts easily, idles at 750 rpm and just keeps on pulling with a glorious sound. And it's simple to adjust and repair if anything does need doing. The new throttle body kits coming out of the States look good and are tempting to try, but if it aint broke....

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Originally Posted by Lockee

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Vroom.