fuel pump better/bigger than stock

[SNKBYT]

I am looking to replace my stock fuel pump. I am looking for a direct drop in pump that is better than the oem. Is the Walboro 255 bigger/better than stock? Is it a drop in replacement? Ido not want to add multiple pumps or returns lines etc. Is there one available that is better than stock. I may be maxed out with the current stock pump and the MSD boost a pump at 700rwhp with a 10lb Roe blower and water meth. Any info/suggestions would be great. thanks Tim

[dansauto]

no its not bigger or better than the stock pump, The stock pump is good for 600-650 Hp. The 255 is good for about 500 hp.

[Kenneth Krieger]

Snkbyt....what is your reasoning for the larger capacity pump? Is your car S/C'd? If so, it would require an upgrade in the fuel system and the 255 would fall short by a mile, and would be unnecessary for a stock or relatively stock car even with upgrades ie: headers, intake smooth tubes and filters, 1.7 RR's, etc.

[Jack B]

Originally Posted by dansauto

no its not bigger or better than the stock pump, The stock pump is good for 600-650 Hp. The 255 is good for about 500 hp.

The stock Gen II pump is actually closer to 200 lph, the 255 is an upgrade. I am running a single 255 with BAP at over 850 hp on nitrous. I log fuel pressure and the pumps holds up fairly well.,

[SNKBYT]

Originally Posted by dansauto

no its not bigger or better than the stock pump, The stock pump is good for 600-650 Hp. The 255 is good for about 500 hp.

Are you sure the walboro 255 has LESS output that stock? Do you have any specs on the pump.

I am sure there are people running S/C cars with one pump and making over 700 hp. I was hoping to hear from the people who are running this set-up. Roe says there are most definately S/C cars that are making over 700 rwhp with one fuel pump, a boost a pump and water meth. This is what I like to do. I had previously made over 700 hp with the stock pump, MSD boosta pump and water meth, before i experienced a lean condition over 5000rpm. I was going to replace the stock pump and replace it with one pump that was better than stock.

[plumcrazy]

i imagine there ARE guys doing it but how close to that edge do YOU wanna run ? i think you're right on it at that point. one little hickup and you are in trouble.

[99 R/T 10]

Originally Posted by SNKBYT

I am sure there are people running S/C cars with one pump and making over 700 hp. I was hoping to hear from the people who are running this set-up. Roe says there are most definately S/C cars that are making over 700 rwhp with one fuel pump, a boost a pump and water meth. This is what I like to do. I had previously made over 700 hp with the stock pump, MSD boosta pump and water meth, before i experienced a lean condition over 5000rpm. I was going to replace the stock pump and replace it with one pump that was better than stock.

What you describe above is exactly my system. Stock pump, with a BAP and W/M, but I am on the ragged edge. I am guessing you have a GTS, which is easier to upgrade, but I have a RT/10 and it is a PAIN to get to. If I go in, I am putting in a 2 or 3 in-tank setup.

[SNKBYT]

Originally Posted by Jack B

The stock Gen II pump is actually closer to 200 lph, the 255 is an upgrade. I am running a single 255 with BAP at over 850 hp on nitrous. I log fuel pressure and the pumps holds up fairly well.,

How much rwhp are you making without the nitrous? Just curious how much the walboro 255 with the boost a pump will support.

[VENOMIS]

I am guessing you have a GTS, which is easier to upgrade, but I have a RT/10 and it is a PAIN to get to.

Not true, the RT/10 has the access panel in the truck. It is the GTS in which the service manual states you have to "CUT" into the fiberglass and create your own access panel. I have a RT/10 and had to replace my pump. I ran out of gas and after a fill up the pump was junk. The reason i ran out is because the guage indicated i had just under half tank. The reason the guage was wrong was because it was a loner ECU. Mine was off getting a tune so i was able to borrow this one to be able to drive car. Car is an 02 and loner ecu was told was out of a 98. Also as an upgrade after i gound all the pop rivets off i added blind nuts and phillips head screws. This way all i have to do is unscrew a few screws and pull the tank. It will be much easier than having to take the drill and drill out pop rivets.

[Shelby3]

Originally Posted by VENOMIS

Not true, the RT/10 has the access panel in the truck. It is the GTS in which the service manual states you have to "CUT" into the fiberglass and create your own access panel. I have a RT/10 and had to replace my pump. I ran out of gas and after a fill up the pump was junk. The reason i ran out is because the guage indicated i had just under half tank. The reason the guage was wrong was because it was a loner ECU. Mine was off getting a tune so i was able to borrow this one to be able to drive car. Car is an 02 and loner ecu was told was out of a 98. Also as an upgrade after i gound all the pop rivets off i added blind nuts and phillips head screws. This way all i have to do is unscrew a few screws and pull the tank. It will be much easier than having to take the drill and drill out pop rivets.

Not true. The GTS has a factory access panel directly above the fuel pump module that is a snap to get to. The GTS fuel pump much easier to r&r. The 255 is an upgrade over stock.

[SNKBYT]

Who sells the Walboro 255 pump? Is it a drop in unit that replaces the stock pump?

[dansauto]

Originally Posted by Jack B

The stock Gen II pump is actually closer to 200 lph, the 255 is an upgrade. I am running a single 255 with BAP at over 850 hp on nitrous. I log fuel pressure and the pumps holds up fairly well.,

probably correct, I have a gen 1 and from what I have read they Gen 1's flow slightly more than gen2's. I have read alot that the 255's are great pumps but they are not as robust as the oem pumps. Just look at the construction... the oem pumps run alot cooler an and are overengineered. the 255's are perfect for supplemental or in parallel with other 255's From what I have read on turbomustangs forums they are not reliable for over 500-550hp full time applications. Maybe with the BAP it would be ok.

[dansauto]

Originally Posted by SNKBYT

Who sells the Walboro 255 pump? Is it a drop in unit that replaces the stock pump?

lots of places, just google it. No, you will have to modify the canister. You may have to run a return, I ma not sure you can dead head the 255's

[Doug Supercharged Vipers]

Please note: if you utilize the Walbro 255 lph internal pump, make certain it has the "HP" efficiency. That would mean High Pressure for boosted or BAP applications. Standard 255's drop off efficiency under higher pressure loads.

If you need the 255 lph "HP" internal pumps we have them in stock.

Best of Luck!
Doug

[Jack B]

Originally Posted by SNKBYT

How much rwhp are you making without the nitrous? Just curious how much the walboro 255 with the boost a pump will support.

525 NA - but, that shouldn't matter, the pump is also supplying the the enrichment for the nitrous. SC and TC engines are a little different since they have to overcome the pressure in the chamber, in other words, my set-up would have to be derated for SC cars.