4.9 Allante fuel rail inlet...? (Page 1/2)
HarryG OCT 20, 09:22 PM
Apparently the engineers at Cadillac used a special inlet fitting for the Allante fuel rail. Every fuel rail I've seen is minus that fitting...

Has anyone found a replacement for that fitting or a work-around solution?
Raydar OCT 20, 11:39 PM
IIRC, It's a cylinder shape with a hole in one side. Sealed with an O-ring, towards the top of the cylinder.
Above the O-ring groove, there's another groove. There's a V or Y shaped clamp that fits into that groove. A screw holds that clamp down.

My car is going to be "down" for a while, in a few days. Will some pics help?

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Raydar
88 Formula IMSA Fastback. 4.9, NVG T550

Praise the Lowered!

HarryG OCT 20, 11:47 PM

quote
Originally posted by Raydar:

...

My car is going to be "down" for a while, in a few days. Will some pics help?





Yes.
Eagerly awaited!!!

Raydar OCT 21, 01:21 AM
Okay.

If you don't hear from me by the middle of next week, shoot me a PM.
I'm probably doing a show on Sunday, so it will likely be after that.
Raydar NOV 10, 12:33 AM
Here we go. Sorry for the delay.

Installed pic


Stainless(?) screws.


Inlet fitting.


The flat plate that is held down by the screws is sort of clipped into the top groove in the inlet fitting. The bottom groove has an O-ring.
The plate is free to rotate around the fitting. That allows the fitting to rotate to different positions.
HarryG NOV 10, 12:50 AM
Raydar,
Thanks for the pix!
Did you use the complete Allante fuel line or just the ends?
Raydar NOV 10, 08:36 AM
Just the last few inches of the hardlines where they connect to the fuel rail assembly. I had a hose barb welded on to the inlet fitting, IIRC.
There's a company near me who makes up hydraulic lines and stuff. They have been very accommodating to my strange projects. For a price.

In the last pic, you can see the return line. It's about a 4" metal stub with the fuel line double-clamped. (The hose barb was added to the inlet side.)
It wouldn't seem to be the ideal method, but it's never let me down in almost ten years.

IIRC, the return line was a generic fitting.

[This message has been edited by Raydar (edited 11-10-2013).]

V8 Formula APR 20, 03:21 PM
I wanted to thank Raydar for posting the pictures of the Allante fuel line connection. These parts are hard to come by these days and salvage yards have no idea what to look for without these very useful pics that you posted. I was able to find one by using your pics and texting it to a salvage yard. So, thanks!
Raydar APR 20, 03:39 PM

quote
Originally posted by V8 Formula:

I wanted to thank Raydar for posting the pictures of the Allante fuel line connection. These parts are hard to come by these days and salvage yards have no idea what to look for without these very useful pics that you posted. I was able to find one by using your pics and texting it to a salvage yard. So, thanks!



I'm happy that they were able to help you.

These fittings are not exactly falling out of the sky, these days.
I hope that someone can come up with an alternative method of feeding the Allante rails. (Or even better... if a fitting like that already exists, in common usage, elsewhere.)
I know someone else who has a fitting that is a bit compromised. I'm sure he would welcome something.
Will APR 21, 09:51 AM

quote
Originally posted by Raydar:
I'm happy that they were able to help you.

These fittings are not exactly falling out of the sky, these days.
I hope that someone can come up with an alternative method of feeding the Allante rails. (Or even better... if a fitting like that already exists, in common usage, elsewhere.)
I know someone else who has a fitting that is a bit compromised. I'm sure he would welcome something.



It would not be hard to take some stainless round bar and turn a replacement on a lathe. The replacement would just have 1/4" or 3/8" NPT (pipe) thead instead of GM's right angle connection. If you want to mail me the fitting, I can model it and make the drawings.