[FrankieT/A]

I run the the RobbMc 1/2" fuel sender, 1/2 stainless line to a RobbMc 550 with 1/2" line to a Qjet. At WOT it runs down to "0" PSI. I called them, told them of the problem and they reffered me to the directions that came with the pump. Well, I followed the directions from the onset, so there were no changes I could make. I followed up with an email. They left me hanging, I'm not happy. I spared no expense to avoid this problem. Just sayin'

[critter]

Originally Posted by FrankieT/A

I run the the RobbMc 1/2" fuel sender, 1/2 stainless line to a RobbMc 550 with 1/2" line to a Qjet. At WOT it runs down to "0" PSI. I called them, told them of the problem and they reffered me to the directions that came with the pump. Well, I followed the directions from the onset, so there were no changes I could make. I followed up with an email. They left me hanging, I'm not happy. I spared no expense to avoid this problem. Just sayin'

I thought it was just me. I tried a 550 a few years back when they first showed up on the scene here at PY. Despite having 1/2 inch lines all the way it would fall flat on the 2-3 shift. They were very helpful on the phone and offered a lot of possible solutions but nothing I tried helped. I did rig a fuel pressure gauge where I could see it and, sure enough, when the car was pulling hard it would gradually start dropping and at the 2-3 shift I was at zero. The car would just nose over. Get out of the accelerator and it would catch back up. Oh, car was probably making about 425hp at the time and I was using a Qjet.

I wrote it off as something I was doing since so many success stories are out there. I sold it and went back to a Mallory. There's a little noise and I have to rebuild it every few years but it works.