Mating Renix fuel rail to HO

Thedude4895 · Mar 28, 2016

SO i'm going to be putting a 1996 HO motor, intake, TB into my 5 speed 1990 Comanche but i'm keeping the renix controls. It seems pretty straight forward but I'm curious what options I have as far as the fuel rail is concerned. I know there is a difference between the 96 and 90 fuel rails so I found a 91-95 style which can mount to the 96 intake and has similar inputs and fpr as the 90 rail.

I've read that I need to extend the fuel lines from the body to the new input location, so what all do I need to do that? could anybody provide examples of how they did it?

Alternatively.. Is it possible to keep the renix rail and mate it to the 96 intake?

Devilfrog · Mar 28, 2016

Renix rail won't mount up, easier to use the later rail.

all you need to do is move the return line fitting, on a Renix it's at the back of the rail ... on an HO it's at the front next to the inlet.

if available grab the HO fuel lines back to the crimps at the firewall.

If not GM fuel fittings work as well, 5/16" and 3/8" ... and run rubber hose back to the Renix Hardlines ... ran like this for a couple years ... then snagged a set of HO fuel lines when I poicked up a parts 93 XJ, so I used those for a slightly cleaner look.

my 88 4.0 uses a 94 fuel rail, 92 throttle body, 00 intake VC and PS setup, 92 exhaust manifold, and Renix ECM (although I did convert to a GM 86-94 2.8L TPS - same as Renix but cheaper and different wire pinout).

Thedude4895 · Mar 28, 2016

Devilfrog said:
Renix rail won't mount up, easier to use the later rail.

all you need to do is move the return line fitting, on a Renix it's at the back of the rail ... on an HO it's at the front next to the inlet.

if available grab the HO fuel lines back to the crimps at the firewall.

If not GM fuel fittings work as well, 5/16" and 3/8" ... and run rubber hose back to the Renix Hardlines ... ran like this for a couple years ... then snagged a set of HO fuel lines when I poicked up a parts 93 XJ, so I used those for a slightly cleaner look.

my 88 4.0 uses a 94 fuel rail, 92 throttle body, 00 intake VC and PS setup, 92 exhaust manifold, and Renix ECM (although I did convert to a GM 86-94 2.8L TPS - same as Renix but cheaper and different wire pinout).

Hey thanks for the reply here (and on comancheclub). Is there any chance you would have part numbers for those fittings or a link so I can order the right ones. What kind of rubber hose should I use? I assume they sell fuel line hose?

Johnnie Walker · Mar 29, 2016

In theory you could build an extension, although one more place to potentially fail.

Mating Renix fuel rail to HO

Thedude4895

NAXJA Forum User

Devilfrog

NAXJA Forum User

Thedude4895

NAXJA Forum User

Johnnie Walker

Piece of Fish!

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