Correct tubing size for CIS injector lines?
 

I have searched the forum and elsewhere and have found conflicting info on this question:

What is the correct polyamide tubing size for CIS injector lines?

The forum seems to point to "thick wall" tubing and this seems to be the Cohline 6mm OD x 3.15mm ID tubing. I have found another reference that points to 6mm OD x 2mm ID tubing (and this doesn't seem to be available anymore). My original CIS lines are long-since gone.

Does anybody have any original lines that they have recently cut apart?

Belmetric dot com.
https://www.belmetric.com/rubber-insulated-polyamide-c-14_184_1167/rhpoly2x10-rubber-insulated-polyamide-2x10mm-foot-p-17405.html

Their part number is: RHPOLY2X10

type this number into their seach box and it should get you there.

Got it - thanks!

A local Pelican sent me some photos of some original lines - they are marked at 6mm OD x 2mm ID. Bel Metric seems to be carrying this only in the rubber-insulated version; I have asked them if they have it available un-insulated (for those of us who like to apply our own stainless braiding). I'll let you know what I find out.

I have complete sets (used) of both plastic and metal lines if you want to bypass the DIY approach.

I’m the local guy, and I’ve offered him mine (used in good shape) to try to solve his fluctuation problems.

Thanks, Dennis! Yes, I'm going to try Dennis' lines first to verify it does make a noticeable difference.

My initial thought was to make a new set of SST-braided flexible lines (because they are so cool); hadn't considered the rigid metal lines. Will think about that...

I don’t recommend the rigid metal lines. They are always in the way when you are working around the engine. Yesterday, for example, i replaced my rear shocks with Koni Sports. The top of the right side shock is behind the engine, against the firewall (yes I know, that’s technicallly in front of the engine). I have the plastic lines, so i unscrewed the bracket that holds the three of them together on the right side. Then I flexed the lines out of the way to get to the nut on top of the shock. That’s a PITA to get at anyway, but if it had the metal lines, I would have had to remove them. Keep the plastic or switch to something else flexible.

That's a good consideration - thanks.

If you go SS braided lines I would be interested to hear your story and know what you ordered, i assume the difficult part are the connections to the injectors and the fuel distributor?