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Fg Manifold Conversion


Guest EGOXRT

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  • Member For: 21y 8m 11d
  • Gender: Male

You dont need a CNC to make a fuel rail. You just need a drill press, some drill bits and a tig welder. To get a nice finished 14mm hole I drilled it out to 13.5 or 13.8 first then finished it off with the 14 (or could have been 13.8, I forget). That way you get a very clean finish for the injector O ring. I just TIGed some fittings and brackets on, very quick and easy. And I am quite sure my fuel rails go as fast as the bling billet ones with fancy names on them.

I bought the extruded ally fuel rail from EFI hardware for around $35 for a 6cyl from memory.A couple of ally AN fittings $14 so pretty cheap all up.

Edited by turbotrana
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  • Member For: 16y 4m 12d
  • Gender: Male

yeah but I make everything on the cnc that's just how I roll....ill have to check out this efi hardware place, that's cheap as think vpw has it for $100 or something...prob can thread the ends for the fittings but got a tig so I can do either or

how much are the processwest ones?

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  • 2 weeks later...
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  • Member For: 19y 4m 23d
  • Gender: Male
  • Location: Perth

Ive fitted the FG inlet to my Territory Turbo and while it wasnt the hardest thing, bear a few things in mind:

Firstly, get yourself an BA/BF throttle body base gasket and lay it over the stock FG manifold flange, you will firstly see that the FG flange is assymetric and the BA/BF gasket is certainly larger, meaning that you will go close to its edge by simply using the BA/BF throttle body without an adaptor plate.. do-able Id reckon, but you're playing very close to the edge of things.

Secondly, make sure you make up suitable manifold support braces as Im sure, over time, you will have problems of the plenum working its way loose from the head. Its a pretty substantial weight to just be left hanging, only supported by the inlet manifold bolts.

The FG fuel rail mates nicely with the manifold and I used spacers under the feet so I could run my Deka 60lb injectors without fuss.

Its a nice factory conversion and certainly lighter and neater than the old style inlet that was never designed with forced induction in mind.. Happy fitting boys!

Mal K

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  • Member For: 16y 4m 12d
  • Gender: Male

the one my mate got already had been welded up and new holes drilled and tapped for the ba/bf throttle body...I got it sitting here im gona trial fit it up on my car to make up some piping for him. he brought some fuel rail from the states we are gona make up for it. ill put up some pics soon...

did you do any before and after dyno to see the difference?

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  • Member For: 19y 4m 23d
  • Gender: Male
  • Location: Perth

No, it wasnt feasable to just back to back the different inlets, as I also fitted a 5" Ballistic Cat, Plazmaman FrontMount I/C, 60lb Dekas and also transferred the LPG injectors onto the FG Inlet. Just to get it to run meant a different tune so at the same time we squeezed more boost into it, only to find the Walbro pump was dying and leaning the whole thing out!! Time for a new pump and retune, but purely from the trusty old Bum-O-Meter, despite the inlet tract being longer, it feels real nice and when tuning, we ran it from 0 to 170km/h plus probably half a dozen times in a row and it didnt heat soak and get slower, which it would do after just one hard pass with the standard I/C and 12lb tune. The rising AFR's were the limiting factor and I'd like to get it to the Motorplex when the next season starts, and maybe run a friends FG F6 for sh*ts and giggles. Im sure I'd destroy him off the line but the other end of 400m might be a different story. Time will tell..

Mal K

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  • Member For: 16y 4m 12d
  • Gender: Male

yeah true. im wondering now if I should get a fg manifold or mod the ba one. I have a n/a one atm cos I destoried my old one. I was gona pull the butterflys out and weld up the holes and machine out the bottom so its one open hole not split split. but fg ones looks so sexy maybe ill bolt my makes onto my motor with lots of lock tight and tell him he cant have it back;)

would be good to see a back to back test though ba/bf compared to fg....guess could just drive a stock fg compared to a bf with a tune

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  • Member For: 19y 4m 23d
  • Gender: Male
  • Location: Perth

If you can get an FG intake for the right bucks, I reckon its probably the better way to go,as you're spending time on what is really a manifold never designed for forced induction. Still, if you're keen, why not have a crack and see what difference you can make. Never let the fact that it has'nt been done before deter you, if anything you may be breaking new ground for us all to learn from.. Its difficult to be a leader, but cheaper and easier to follow someone..

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  • 8 months later...

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