Fuel Pump help

Elmo370z · 03-29-2017, 12:30 AM

I'm going to be replacing my walbor 255 in-tank pump here soon and need help choosing a replacement pump that is similar. Anyone have any suggestions. I just have the basic bolt ons: long tubes, intake, and exhaust so i don't need anything crazy just yet. I was looking at the aem e-85 pump, but i don't know if the 320 would be too much pump for now.

BGTV8 · 03-29-2017, 08:20 AM

Ask phunk ........... he is fuel pump meister

VSS370z · 03-29-2017, 09:16 AM

All i know is that people here use 340 and up pumps for turbo and supercharger applications i don't know if its a good idea to go to a bigger pump for N/A cars. Phunk is definitely the man to ask.

Jayhovah · 03-29-2017, 09:57 AM

If you are staying NA, then I would just get another 255... did it fail or was there a reason you wanted to swap?

ChaseZ · 03-29-2017, 10:24 AM

I've got a couple spare OEM pumps if you want one. With what you've got there's no real benefit to upgrading until your close to maxing out your duty cycle.

Jayhovah · 03-29-2017, 10:26 AM

Quote:

Originally Posted by ChaseZ

I've got a couple spare OEM pumps if you want one. With what you've got there's no real benefit to upgrading until your close to maxing out your duty cycle.

Elmo370z · 03-29-2017, 11:11 AM

Quote:

Originally Posted by Jayhovah

If you are staying NA, then I would just get another 255... did it fail or was there a reason you wanted to swap?

I'm staying NA. Full retard on the build later this year. The 255 i have in the rrp is failing. I just need something comparable.

Elmo370z · 03-29-2017, 11:12 AM

Quote:

Originally Posted by ChaseZ

I've got a couple spare OEM pumps if you want one. With what you've got there's no real benefit to upgrading until your close to maxing out your duty cycle.

Thanks. I have a back up oem pump. If i cant find anything worth while i just use that.

Jayhovah · 03-29-2017, 11:41 AM

Quote:

Originally Posted by Elmo370z

I'm staying NA. Full retard on the build later this year. The 255 i have in the rrp is failing. I just need something comparable.

If you're already tuned on the 255 you may want to replace with another... most likely your idle pressure (unless you drilled the venturi and regulator) is higher than OEM... idle may suffer if you change back to OEM (this is only if you got a custom tune after putting in the 255).

If you did all the drilling, etc, then your idle pressure will be low if you go back to OEM.

I think the only case in which you would want to go back to OEM is if you never drilled anything for the 255 and never got a tune done after installing it.

EDIT: See phunks posts below - more clarifications and corrections what I have said.

phunk · 03-29-2017, 12:25 PM

The stock 370z pump is the perfect answer. I was not aware you had one laying around or I would have recommended that one. It will fit the pump holder in the RRP.

phunk · 03-29-2017, 12:26 PM

Quote:

Originally Posted by Jayhovah

If you're already tuned on the 255 you may want to replace with another... most likely your idle pressure (unless you drilled the venturi and regulator) is higher than OEM... idle may suffer if you change back to OEM (this is only if you got a custom tune after putting in the 255).

If you did all the drilling, etc, then your idle pressure will be low if you go back to OEM.

I think the only case in which you would want to go back to OEM is if you never drilled anything for the 255 and never got a tune done after installing it.

What will happen if you drilled the jet and then go back to a stock pump, the fuel pressure will not lower, but the venturi strength will be lowered. Because the drilling did not modify the regulator, it was just to allow the regulator to breath better for the higher volume of fuel it had to bypass with the larger pump.

phunk · 03-29-2017, 12:43 PM

Quote:

Originally Posted by Jayhovah

If you did all the drilling, etc

I have been considering making a batch of billet aluminum jets for the bottom of the stock fuel pump module so that nobody has to modify the stock one anymore. They could sell it to someone who wants to go back to stock or keep it around in case they wanted to.

I wonder how many people would spend an extra $45-50 during their fuel pump upgrade to get a jet that didnt need drilling?

Jayhovah · 03-29-2017, 12:49 PM

Quote:

Originally Posted by phunk

I have been considering making a batch of billet aluminum jets for the bottom of the stock fuel pump module so that nobody has to modify the stock one anymore. They could sell it to someone who wants to go back to stock or keep it around in case they wanted to.

I wonder how many people would spend an extra $45-50 during their fuel pump upgrade to get a jet that didnt need drilling?

I don't personally think it would be worth it, and that is coming from someone who improperly drilled it and had to go searching for a replacement.... =)

I think what would have saved me is having a diagram or something to look at so I better understood what I was trying to accomplish with the drilling. Also a table with common pumps and drill sizes to take out the guess work.(Please don't take any of that the wrong way, I am not placing any blame on anyone but myself particularly since my fueling equipment was supplied by another vendor)

All that being said, most people on here would see $50 as a drop in the bucket when doing a build and are more than willing to spend. I am one of the more frugal (CHEAPSKATE) members, it would appear.

Elmo370z · 03-30-2017, 03:31 PM

Quote:

Originally Posted by phunk

The stock 370z pump is the perfect answer. I was not aware you had one laying around or I would have recommended that one. It will fit the pump holder in the RRP.

Ok cool beans ill just wait on the revise.

03-29-2017, 12:30 AM	#1 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	Fuel Pump help I'm going to be replacing my walbor 255 in-tank pump here soon and need help choosing a replacement pump that is similar. Anyone have any suggestions. I just have the basic bolt ons: long tubes, intake, and exhaust so i don't need anything crazy just yet. I was looking at the aem e-85 pump, but i don't know if the 320 would be too much pump for now. Last edited by Elmo370z; 03-29-2017 at 12:34 AM.

03-29-2017, 08:20 AM	#2 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,514 Drives: 09 Nissan 370Z M6 Rep Power: 39973	Ask phunk ........... he is fuel pump meister gomer_110 and Elmo370z like this.

03-29-2017, 09:16 AM	#3 (permalink)
VSS370z Enthusiast Member Join Date: Apr 2012 Location: Puerto Rico Posts: 380 Drives: 09 Nissan 370z CY M6 Rep Power: 13	All i know is that people here use 340 and up pumps for turbo and supercharger applications i don't know if its a good idea to go to a bigger pump for N/A cars. Phunk is definitely the man to ask. Elmo370z likes this.

03-29-2017, 12:25 PM	#10 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	The stock 370z pump is the perfect answer. I was not aware you had one laying around or I would have recommended that one. It will fit the pump holder in the RRP. Elmo370z and Jayhovah like this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

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03-29-2017, 10:24 AM	#5 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94683	I've got a couple spare OEM pumps if you want one. With what you've got there's no real benefit to upgrading until your close to maxing out your duty cycle.