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Fuel Pump help

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

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Old 03-29-2017, 10:41 AM   #1 (permalink)
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Originally Posted by Elmo370z View Post
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.
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Old 03-29-2017, 11:26 AM   #2 (permalink)
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Originally Posted by Jayhovah View Post
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.
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Old 03-29-2017, 11:43 AM   #3 (permalink)
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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?
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Old 03-29-2017, 11:49 AM   #4 (permalink)
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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.
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