1993 LS Swap (6.0L LQ4 and built 4L60e) (2 Viewers)

[daytrader]

Final Product below. For the low pressure return line I just heated it up in boiling water and jammed it onto the wix filter with a hose clamp.

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On the other side of the fuel system I had to get creative to plumb the high pressure toyo line to the GM fuel regulator.

Here is the parts list:

Russel 640850, 610160, 610020, 640380 (to be brazed onto toyo fitting)

Wix 3373 (fuel regulator)

Starting from the GM fuel rail and working backwards... the Wix filter regulator clips right on. I made a little bracket that i riveted to the filter combo and bolts to a little 8mm bolt on the intake - this is probably overkill. on the back of the wix filter you need another press on fitting that converts it to -6AN (640850).

This is a good time for a tangent on AN fittings. Before I started this project I had no idea what they were. Here is a good summary I found - http://www.superstreetonline.com/how-to/engine/htup-0805-automotive-plumbing/
Back to the hose- once you're in AN fittings you need to get some -6 AN hose. Mine was 22" long (could be a bit shorter on second look). On one end I put a 90 degree joint (610160). On the other end of the hose I used a female end (610020). Now for the trick part.

The toyo high pressure fuel fitting is M14 x 1.5 INVERTED FLARE connection. It took a lot of effort to find this out, but the description for the replacement part lists this. Anyway, there is on adapter to go from M14 x 1.5 inverted flare to -6AN. I found it on ebay for $30. (seller 3sxperformance). I can braze so I decided to make my own. I got a steel -6AN fitting that looked like it would sleeve over the toyo female M14 fitting and went to town.

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Just an alternate option

• 14-0121 M14x1.5 Inverted Flare to 6AN Male, Short M14 Inverted Flare to 6AN Male Fittings - http://www.radiumauto.com/M14-Inverted-Flare-to-6AN-Male-Fittings-P375.aspx

 

[MMaxim]

I am wondering if there is an update on this build.