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Stock Fuel Lines

2BNVS

By 2BNVS,
in Engines & Forced Induction

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2BNVS Veteran

2BNVS

Posted
Posted

ive searched and all i can find is threads on fuel rail or fuel pumps etc, nothing on the actual fuel lines...

Just curious to know if anyone knows confidently the limitations they have/if any?

i have 600rwhp in my car t04z rb26/30, running surge tank, 1 internal pump, 1 external pump, 700cc injectors, a/m twin entry rail

cheers...ben.

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Gts-t Grand Master

Gts-t

Posted
Posted

I think it would depend on how much pressure you are running thru them.

If its near standard base fuel pressure then i think perhaps u should only refresh the factory items :D

Also i take it we are talking about the rubber lines and not the metal ones that run upto the front of the car?

GeeTR Grand Master

GeeTR

Posted
Posted
I think it would depend on how much pressure you are running thru them.

If its near standard base fuel pressure then i think perhaps u should only refresh the factory items :D

Also i take it we are talking about the rubber lines and not the metal ones that run upto the front of the car?

I assumed he was talking the flow potiential of the metal lines that run up underneith.

You cant really just keep piling up the base pressure, as 45 + 30 max = a fair deal already.

Gts-t Grand Master

Gts-t

Posted
Posted
I assumed he was talking the flow potiential of the metal lines that run up underneith.

You cant really just keep piling up the base pressure, as 45 + 30 max = a fair deal already.

Yeah i think its best to keep the base fuel pressure stock, and was saying if the rubber lines are in good condy they should be ok.

s13_Skyline_inside Proficient

s13_Skyline_inside

Posted
Posted

id be fairly interested to see what people think of the stock lines as well, stock line i should say, im going to be running twin 044's, i dont know if i should join them together into the single stock line or run an extra line the same diameter as the stock line for the 2nd pump?

GeeTR Grand Master

GeeTR

Posted
Posted (edited)
...but i dunno

Sounds like you need an excuse to run some under car hardline and fill Mr Speedflows pockets a little more ha :) Your car is already off tap crazy gurl.

Id hazzard a guess that very few of the big HP cars in the "SAU Dyno" threads run larger lines, i reckon your fine.

Edited by GeeTR
GeeTR Grand Master

GeeTR

Posted
Posted

If your (needing to) run twin 044's in the first place, injector fuel distribution is prolly guna mean your running a AM rail (6x 700cc+ inj's, long rail, good idea) with twin feed... possibly.

I'm too lazy to do the math, but when your maxing out a 044 pump and need two, possibly you'll reach the limit of the standard steel lines. When you get there, 800rwhp+... $100 max worth of hard line will be the least of your issues *evil laugh*

BEV11S Enthusiast

BEV11S

Posted
Posted
the twins are more of a precationary approach, and yes gunna be running am fuel rail etc, may as well just add another line the same size as the standard one ;)

Instead of having 2 delivery lines the same as standard, why not just have one bigger line?

Im running an RB25 in a datsun and had to upgrade the line (factory datsun lines arent very big) so i put in a 3/8 line (8mm) and the standard skyline lines are 5/16 (6mm), just to be safe.

  • 5 months later...
drgnball34 Rising Star

drgnball34

Posted
Posted

my engine is getting put back together as we speak and im at the stage now where i need to sort out the fuel system. Already have x2 044 pumps, surge tank, fpr, a/m rail and 1000cc injectors. I was thinking larger rubber ones in the boot and larger metal underneath up to the front and use standard return. As mentioned, will join two pumps into a single larger pipe be a good idea? Power goal of 700rwhp. Can i get some recommendations/feedback?

cheers

Ryan1200 Proficient

Ryan1200

Posted
Posted

I used the 2 factory lines to feed either end of my rail and connected a -6 braided line to the regulator and ran that back to the tank.. I run two nismo's intank so its nice and quite better than the old smelly, noisy twin 044's with mass of pipes in my boot...

  • 1 month later...
johnbarry88 Grand Master

johnbarry88

Posted
Posted

people say that the standard lines will do for big power some say they wont..for the price of running new lines, think it cost me well under $70 to run 3/8" all the way, then why not do it...peice of mind plus running 3/8" line means having nearly 20% more size over the standard lines.

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