fuel pipe fitting sizes... need adapters for ss

ed hess

ed hess

race or get outta the way
I didnt ruin my fuel pipes pulling the motor. But theres is no way i want to try to reinstall the motor with hard fuel lines. So i need to find the fitting sizes of the fuel rail and the opposite end of the old fuel pipes fitting size. part numbers would be nice to if somone else has done this.

It appears the feed line is a different size than the return line at the fuel rail.
I always get screwed up on fitting sizes and types so if someone can help me out i would appreciate it.

And afterwards we can put this on hurydes site for others to reference.

thanks

ed
 
S

smeagol

Active member
Feed line

6AN line
6AN fititings
Earl's #991955 (pretty sure, I'll verify this at home)

I forget if the package has one or two fittings, but they will connect to the fuel rail feed, as well as the fuel filter outlet.

So you can run AN line from the filter up to the fuel rail. Once you are AN, you could even put a remote fuel pressure test port - under the truck etc, so it's not under hood.

Return line - not sure, haven't ever replaced that one.

Are you keeping the stock fuel rail ?
 
ed hess

ed hess

race or get outta the way
yes for the time being unless I get the urge to get one of these jsdesign rails.

thanks for the numbers.

btw
seems to me since the return line is smaller i will look at what the part number equates to in earls online catalog and just get the next size smaller.

My whole life ive had this hangup with fitting and thread sizes .....beats me.

thanks
ed
 
S

smeagol

Active member
The return isn't AN, not sure what it is.

The fuel rail feed & fuel filter are 3/8" Saginaw I believe.
 
B

Buster

New member
Ed

I have a complete setup here, includes the braided line, both fittings, one for the rail and one for the fuel filter. If you want it let me know.
 
ed hess

ed hess

race or get outta the way
yeah i want it, but were do you live. Just the part numbers and the line length would work also.

I never heard of saginaw 3/8!!!

ed

off to look this up.
 
L

Lynn D. Brown

New member
Fuel Lines

Fuel Lines

ed,

From the Earls' catalog, 6 AN has an inside diam (ID) of 0.344", vs a 0.375" Outside Diam (OD) for the stock 3/8" steel line. Not sure what the ID is on the steel tubing, but the 6 AN does not appear to be any upgrade in size.

U might consider 8 AN if U R pushing the power level. I don't think there is any point to changing the return line, since at WOT very little is being returned.
 
S

smeagol

Active member
FWIW, I used 6AN for ~600hp

I'd definitely do 8AN if I was doing 750hp+, but at that point, the rail is a restriction.

Almost time to move this to the vault. Maybe get some part numbers for the fuel pressure gauge fittings in here first ?
 
L

Lynn D. Brown

New member
Fuel lines & injectors

Fuel lines & injectors

Say I guess I will be going w the 76 # injectors, as alotta the guys R doing OK w them.

Who has a good price ?
 
ed hess

ed hess

race or get outta the way
i already ordered the fittings.

On the id subject: Since the id of the pipes out or the tank are probly the same wouldnt the upgrade to the AN8 fittings be a mute point?

As for the pressure gauge fittings i allready have a tee and swivel fitting on the rail for an underhood mechanical gauge mounting off the abs unit. This is also tee'd for an electric remote sensor for an incab memory electric fp gauge installed in a underdash gauge cluster i made this past summer.

cluster has af ratio, boost with memory, fp, tc lockup switch, ic pump, fan switch (for staging lane cooling). so it looks like im good to go on this one.

ed

Btw i will be running 50#'ers initially with vortec, 412, headers, pte60, 2800 911. Kinda like the std recipe around here. daily driver also.

looking for something in the 11's.
 
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smeagol

Active member
On the id subject: Since the id of the pipes out or the tank are probly the same wouldnt the upgrade to the AN8 fittings be a mute point?

Yes, but if I was going for that 750hp or whatever, I'd be doing an external pump that was sumped. Kinda glossed over that point, was focusing more on fuel line size.
 
L

Lynn D. Brown

New member
Fuel Lines

Fuel Lines

Ed & Brian,

I was assuming that U were going AN all the way back to the Fuel Rail. Why else would we be talking about AN lines and fittings ? Serious GN guys go one 8AN feed line and the really serious ones go w 2 - one in each end of the fuel rail.

I tried to save a few $$ on my GN by making a 2nd 3/8" line back out of 3/8" brake premade pieces. I got a quick education - the doouble flared brakes fittings won't seal todays' gasoline. I guess that's why GM went w Saginaw O fittings.
 
ed hess

ed hess

race or get outta the way
lynn
i understand what your saying but the 4 fittings i needed just arrived and
im now just measureing how much $$ line i need.

ed
 
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