[scott70]

Originally Posted by Gator67

I used a hammer and large screwdriver I have no plans to reuse the pump, or buy another new one. My wife drives this car around town, so it has to be reliable.

I'll probably order up a RobbMc pump for this car as well as my GTO, since that one's down with a bad Delphi pump as well.

The robbmc mechanical pump has to have a regulator with it. I didn’t realize that,, they used to be self regulated but they changed it a few years ago

[TXSTARFIRE]

Depending on the year some pumps used 3/8 mounting bolts and some used 5/16 bolts.

[Gator67]

Originally Posted by scott70

The robbmc mechanical pump has to have a regulator with it. I didn’t realize that,, they used to be self regulated but they changed it a few years ago

Interesting. This seems to contradict the information on the website/instructions, which indicates a regulator is not typically needed with the 550hp version of the pump (it is needed on the 1100)...it says 7psi +/- 1 and that using the vapor return should reduce it by 1psi. This seems to be in the ballpark of what I need for a Qjet. Was your experience different?

The instructions also suggest that if a regulator is needed, it should be a non-return version placed between the pump and carb. The problem here is that I seem to recall to function correctly, the pressure to the regulator should be like 3psi greater than the desired pressure.

[scott70]

Originally Posted by Gator67

Interesting. This seems to contradict the information on the website/instructions, which indicates a regulator is not typically needed with the 550hp version of the pump (it is needed on the 1100)...it says 7psi +/- 1 and that using the vapor return should reduce it by 1psi. This seems to be in the ballpark of what I need for a Qjet. Was your experience different?

The instructions also suggest that if a regulator is needed, it should be a non-return version placed between the pump and carb. The problem here is that I seem to recall to function correctly, the pressure to the regulator should be like 3psi greater than the desired pressure.

Yes sorry… the 1100 pump used to be adjustable and they did away with it the save on costs.

[Gator67]

I installed the AC Delco pump on the bird, and took her for a quick drive. Seems fine, but the pump has been sitting for at least 20 years, so we'll see how it holds up. These pumps are pretty expensive now, so rather than looking for a spare, I ordered a couple RobbMc pumps and the fittings I'll need to make them work in the Bird (and GTO). I plan on running a factory style line from the carb, but I'll put a -6 fitting somewhere below the alternator so from the top it won't look out of place.

[M91196]

RobbMC and -8 all the way and vapor return.

[Gator67]

I installed an Airtex 40710 in the GTO...it was unused, but an older USA made one in the red and blue box. Hopefully it will hold up for a while, at least until the RobbMc pumps get here. As Mgarblik suggested, I bench tested it first.

I had to use a different hard line to the carb because the outlet port is in a slightly different location than the later 40863 style pump (i.e., Delphi MF0100 pump I replaced). I do like the location of the ports better on the later style pump...the inlet tube on a 40710 points at the steering box, which is just a few inches away, so there's a tighter than ideal bend in the hose, and the location of the outlet makes it was impossible to get any of my 5/8 flare wrenches around the tube nut on the hard line. At least the goat's running now.

[tjdjr]

I have had good luck with the Carter 6907, my fuel pressure gauge runs 6-7 for pressure.