Ladies and Gentlemen. I have a 2007 Base Corvette with an automatic and I am just about to drop the left tank to remove the fuel pump system to replace the pump. I am going with a stock replacement and I understand that it is a Warbro 255. I have found several for sale on the web but apparently this size pump is found on many modern cars. I want to purchase the correct unit. Does anyone happen to know the part number for just the pump as I am going to reuse the original cage. Thanks HRP.

 

Why not replace it with the C6 Z06 pump? It's a drop in fit and flows better than the stock base pump.

 

Mike, thanks for the input and I will go with that. This is another reason the forum is such a great place for Corvette owners. Someone always has the answer. Again Mike, thanks for the quick reply. I was stationed at Mather AFB back in the late 70's and on weekends I drove to San Francisco and really enjoyed the great food and gracious people. Nice place. HRP

 

Agreed, it will support at least 530 rwhp on e85 and over 600-650 rwhp on 93. I have it on mine, but actually just about to upgrade to a Walbro 450 today. It's been great the past year though.

 

Gentlemen, thanks for the great feedback. I searched the web and found a few new and used complete left tank systems. What I would like to do is pull the "cage" and remove the OEM pump and install the higher flow unit. Do you have a part number for just the pump, or it is better to replace the entire unit with the float and all? HRP

 

I think the ACDelco part number for the whole assembly is M10059

 

Racetronix sells them too. Hard to beat their price. The price includes the level sender.

http://www.racetronix.biz/itemdesc.a...U476-1&eq=&Tp=

 

as long as you keep driving around on empty it will only burn out again, keep the tanks full, the gas cools the pump

 

Thanks to Mike, Jesse, Ken and CMY SIX...all great information. I should be able to get what I need and thanks for the fuel level tip. It makes sense! HRP

 

Keep in mind that the fuel pump inside the module isn't simply a Walbro 255. The Corvette fuel pump has a second miniature outlet pipe at the top of the pump that delivers pressurized fuel to the bottom of the module to spin a jet pump. The jet pump sucks fuel from the very bottom of the tank/module and keeps the module full at all times. The only time the module will not be kept full is when you actually run out of fuel. Running the car with 1/8 of tank of gas (as shown on the gauge) is not a problem. The module will still be overflowing with fuel.

Changing out the fuel pump inside the module is not as easy as you think. I've had one all apart. It isn't simply disconnect the pump at the top electrically and pull the hose off the fitting on the pump. The internal hose/pipe is nylon and must be replaced and you have the second miniature nylon hose/pipe to worry about. I've never seen a replacement available for it if it becomes damaged during removal. Finding a replacement (correct) pump is next to impossible due to it having the second miniature outlet.

If you don't plan on any horse power improvements then you can save $35 and just buy the non Z06 module.

http://www.racetronix.biz/itemdesc.a...U475-1&eq=&Tp=

Keep in mind that the original fuel pump modules sold buy Racetronix come with the fuel level sensor. It's a good idea to change it out too while the module is being replaced.

 

It's important to mention that if you upgrade to a 450 type of pump you will no longer have the second miniature outlet at the top of the pump. You then must cut out a portion of the bottom of your bucket or drill lots of holes in the bottom of the bucket. The bucket will no longer be kept full at all times with the jet pump feature. Driving around with less than a quarter of a tank might result in the fuel pump not being completely immersed in fuel. As well if you track your car than you risk having the fuel slosh to one side in the left tank and uncover the pick up point if your fuel level is down. The bucket becomes useless and is just kept to provide support for the fuel pump assembly.

 

Hello HRP I changed to Walbro 450 lph works with E85 and you don't have any more fuel restriction later should you want to make other changes and all I changed was the pump even re used the original hose just added a worm type hose clamp, there's no need to upgrade the harness ether and is what I recommend.

If you have any questions regarding the task ask me I'm good at this, David.

 

Swapping just the pump is a nightmare. It's not worth it. But a used C6Z assembly and be done with it.

 

David, thanks for the feedback. Sorry I did not get back to you sooner. I was out of town at an air show. Anyway, do you have a part number for this unit, or a way to find out where to obtain one? With regards to working on mechanical things, I have been working on foreign and domestics since age 13 and I am now 64. Nothing on a car scares me. I even built a street legal race car from the ground up and it runs 0-60 in 3.9! I have also made custom tools for the "tough" tasks. Even seasoned mechanics call me from time to time. I am not a professional mechanic...I just love and live for this stuff. The more challenging the job the more I like it. Retired Air Force flight officer.

 

Hello gent the task is to me an enjoyable one after all is only work but been good at it makes a real pleasure must will stumble at getting it out of the tank and replacing the cross over tube I will tell you how and you will agree is actually fun but must of all you'll do it rite the first time, the kit in the attach link includes hose and clamps be sure is an in tank fuel hose I prefer the original one though 305457 therty sixty six.

http://www.highflowfuel.com/i-103881...esURoC8hjw_wcB

There are less expensive kits in ebay but there's also lots of fake use your judgement.

 

Again David, thanks, you have been a big help. If I get stuck I will get back to you for guidance. HRP

 

I suppose you have an auto transmission, are you going to be doing this on the floor like me?

 

Agreed, it's not much more work to pull the pump and swap in the Walbro 450, probably less money all said and done too. You can find one for about $100. Then you are set for a long time, it's rated for over 750 hp.

 

(if you go factory pump route I'd replace the whole assembly while it's out--if going the larger pump then cut up the old bucket instead)

 

Yes to both questions. And believe it or not the tank is already out. Boy was that fun! There was not a lot of room to work with and I literally made a special tool to pop the black plastic security collar loose and a heavier duty tool of the same basic design to rotate the silver metal locking collar in the counterclockwise direction. In my case to provide a bit more working space, I removed the central exhaust tubes, tied the aft tube of the driver muffler up, and I removed the shift lever from the left side of the transmission and tied it up out of the way. As a precaution I recommend covering the exposed stud on the side of the transmission so it does not add to your collection of scars. Do you have any other tips? HRP