Had my fuel pump assembly go bad (broken hose coming off of the in tank pump). The hoses look pretty bad so I'd like to replace all of it. Does anyone know of a "ready to install" pump/strainer assembly? I have a new OEM sender unit and was hoping to find a 255lph assembly that will fit in all of the stock locations. The best I found was 32gph (approx 121lph). Any help would be great. Thank you.

Troy

 

One possibility. Requires reuse of the stock “bucket.

https://www.racetronix.biz/k/flt1-fu...xp255/rfpk-003

 

Fred,

That may not be a bad idea. My bucket seems to be ok, I was mainly concerned about the hoses. Do you know if this will this work with the new OEM sender unit (AC Delco MU2424)?

Troy

 

Have no idea about that part #. Is that a superseded part # for the original sender, or possibly an AC Delco equivalent? The Racetronix FLT1 kit is made specifically to fit the stock 93-97 LT1 sending unit. I have spare (level sensor missing) factory unit in my parts pile, I can pull the part # off if you need it.

 

Yes, the MU2424 is an AC Delco p/n for factory sender assembly. To reuse the stock bucket, is it just a matter of separating it, installing the aftermarket pump and then super-glue it back together or is it something more in depth? Also, is the 255lph pump matched well for my build or too much/not enough volume? I do not plan to increase hp/torque in the future.

 

As I recall, the Racetronix listing for the pump kit describes the reuse of the bucket. The kit includes the glue required to repair it.

The part # on my spare sender was not useful. Did not cross-reference to any known GM part. When we did the fuel system for my Formula in 2000 they dropped the tank to install a connection for an outboard second pump. They pulled the original stock sending unit, and replaced the stock pump with a Bosch 208 LPH high pressure pump. (Doesn't sound big enough, but easily supported 74#/HR injectors running at 58 PSI, 500 HP NA - the second pump supported the 300-shot of dry nitrous).

That involved using a "kit" to turn the Bosch pump into an in-tank unit, and modifying the sending framework. They did not reuse the bucket, because I still have the pump they pulled out and it's in the bucket. Shortly after putting the car back into service, the fuel gauge failed. Back then, the only way to get a new fuel level float sensor was buy the complete sending unit and drill out the rivets to get the level sensor off to use it to replace the old sensor. Hence, I have a 22 year old "new" sending unit (without pump) missing the level sensor.

The Bosch pumps are extremely reliable. The outboard pump (also 208 LPH) was part of an NOS dry nitrous kit I bought and installed in 1994. New owner of the Formula indicates it's still running, although he's only spraying a 150-shot so far.

 

The new sender unit assembly (MU2424) looked to be spot-on exact as the one that came out (I assume it was factory installed in 1995) with the exception of the pump/bucket/hoses etc.. I have the new one loosely installed to close up the big round hole since the tank is still installed (I did the trap door mod).

I think I have enough info now to go forward and order the rest of the parts. I appreciate the insight on pump volume/pressure and injectors that you mentioned. Glad to know I am probably not close to the max end of the 255 Walbro with my setup.

Thank you again!

Troy