Also need help getting started vortec tbi

**rsicard** · 01-10-2015

Dave:

The one problem that has me stumped is the fittings on the throttle body. There are adapters on the throttle body that adapt to GM fuel tubing that has "O" Rings. Don't know what they are called or if there is tooling to form the bubble near the end of the tube and the "O" rings that go onto to the tube. Need some advise as to where to go to get the appropriate fittings. I tend to go to 37 degree flare AN fittings as I came from an aviation background. Now have a source for higher flow AN fittings. I have cleaned up a spare 454 throttle body and sent off injectors to mrinjector. Hope to get them back from him soon. Have another set of injectors from a 454 throttle body that is on my 1994 suburban which is now used for an air valve only. The fuel portion was taken off and stored from which I have the spare 17104288 injectors. These have been assembled into a spare 454 throttle body along with a new regulator diaphram and original '94-'95 regulator (heavy and tall) spring. A high pressure pump is on order and should come in soon. When I switch engines, the fuel tank will have to come out for replacement of the fuel pump. The next hurdle will be adjusting the regulator. Have a spare harness and spare 16197427 and will put the 350 Vortec on my run-in stand and get all the electrical and EFI harness all hooked up. Then run it and try to set the fuel regulator.

**dave w** · 01-10-2015

I think Earls Fittings or Russell's Fittings will offer the AN fittings your looking for.

http://www.summitracing.com/parts/ru...FROTfgodfJ0AOA

dave w

**rsicard** · 01-10-2015

Dave:

Have tried Earls and Russell fittings. The extended fittings that attach to the throttle body are a metric 1.25 mm thread pitch and the other end it the bubble with an "O" ring much like the power steering fittings. Don't know what the name of the "O" ring fittings which have a different thread pitch. Need to find a tool to form the bubble and get "O" rings for the fittings. Would like to find someone that handles adapters to AN fittings. Found a good supply house in California for XRP AN fittings which flow more than regular AN fittings.

**fastacton** · 01-10-2015

You can also get tubing with the proper fittings at your local auto parts store. Ask for part numbers 800-151 and 800-153 by Dorman. I use them when I don't need to go with AN lines.

**rsicard** · 01-10-2015

fastacton:

Thanks every so much. This is exactly what I need for a recommendation. I will go to my local auto parts store that handles Dorman parts and see if they have or can get them. Again thanks.

**dave w** · 01-10-2015

Originally Posted by rsicard

fastacton:

Thanks every so much. This is exactly what I need for a recommendation. I will go to my local auto parts store that handles Dorman parts and see if they have or can get them. Again thanks.

The Dorman 3/8" line is 16mm x 1.5 and the Dorman 5/16" line is 14mm x 1.25.

dave w