85 SVO Fuel Pump Question

[Justin_R]

I have an 85 and rite now im gonna change out one of my fuel pumps to a 255 high pressure walbro, I was thinking of just getting the inline walbro 255 and leave the in tank one stock would be alot easier would this be ok? Or should I just do the single pump mod and get the in tank 255?

[KCoker]

That will work fine. Most change to the in tank high pressure so thay can run dual exhaust.

[Zap's 85 GT]

There is no performance reason to go with a single pump. The two pump setup is actually quite good. Leaving the in tank feeder pump in place wouldn't make much sense. The previous owner of my car put a 155lph pump in the tank but kept the frame mounted pump too. I've learned to go one way or the other(84-85 or 85.5-86) but don't reinvent the wheel or Micky Mouse the fuel system in these cars.

The only reason I did it to my SVO was to install dual exhaust.

[Justin_R]

Wait why wouldn't I keep the feeder in tank pump?

There is no performance reason to go with a single pump. The two pump setup is actually quite good. Leaving the in tank feeder pump in place wouldn't make much sense. The previous owner of my car put a 155lph pump in the tank but kept the frame mounted pump too. I've learned to go one way or the other(84-85 or 85.5-86) but don't reinvent the wheel or Micky Mouse the fuel system in these cars.

The only reason I did it to my SVO was to install dual exhaust.

[KCoker]

There is no reason to take the feader pump out of the tank.

I think he was saying not to have two high pressure pumps.

[dondo84svo]

I recommend a single 255lp in the tank (245hp unported head, stock bottom end, fmic hks bov 19lbs)

[Bob Barker]

Simplicity is the major reason for leaving the intank pump alone and installing a high volume in line pump. This set up will support that power level easily.