Stock Fuel Lines

[2BNVS]

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.

[Guilt-Toy]

this would be interesting to know

[GeeTR]

Assuming a R33 GTST has lines of the same diameter as a BNR32, twin 044's, T51 and 780rwhp

[Gts-t]

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

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]

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

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]

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.

[2BNVS]

yeh i was refering to the metal lines running all the way

[s13_Skyline_inside]

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?

[2BNVS]

some ppl have told me that they become a restriction at 320rwkw.... and to get a bigger line, and use the stock one as the return, but i dunno

ben...

[R31Nismoid]

I used my HR31 lines (dunno if same size as R33) for 370rwkw without an issue.

Plenty of GTR's over 450rwkw, even 600rwkw i think

[GeeTR]

...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 November 16, 2007 by GeeTR

[s13_Skyline_inside]

how about running twin pumps into a single standard line? or should you go for a line for each pump?

[GeeTR]

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*

[s13_Skyline_inside]

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

[BEV11S]

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.

[drgnball34]

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]

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...

[dano4127]

Anyone have any tips for connecting braided lines to the stock fuel lines?

[johnbarry88]

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.

[GeeTR]

Anyone have any tips for connecting braided lines to the stock fuel lines?

818 Series Tube Nut