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Author
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Topic: Fuel Line question
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65_289
Gearhead Posts: 761
From:
Registered: Jul 2001
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posted 03-29-2003 04:42 PM
   
I am taking Alex's advice and using my drain plug as a secondary fuel pickup. I will be running 2 Holley blue pumps, one for the carb & one for the nitrous. My question is, should I just run the line from the drain to the nitrous pump, or should I combine the drain & the regular line, and then split them off to the 2 fuel pumps? Thanks!
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steve'66
Gearhead Posts: 9104
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 03-29-2003 05:13 PM
Run two seperate fuel systems, one for the carb and one for the nitrous. 
Two Holley Blue pumps are gonna be LOUD.  SteveW
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65_289
Gearhead Posts: 761
From:
Registered: Jul 2001
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posted 03-29-2003 06:35 PM
quote:
Originally posted by steve'66:
Run two seperate fuel systems, one for the carb and one for the nitrous.
Two Holley Blue pumps are gonna be LOUD. SteveW
Do you think the drain plug opening will be large enough to flow plenty of fuel for the n2o? Yeah, it will be loud. But it will be wired so that the 2nd pump is only on when the nitrous is armed. The nitrous will only be armed at the starting line, when I have the open headers! 
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steve'66
Gearhead Posts: 9104
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 03-29-2003 07:53 PM
quote:
Originally posted by 65_289:
Do you think the drain plug opening will be large enough to flow plenty of fuel for the n2o?
Oh yeah, plenty big for a n20 shot. SteveW
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65_289
Gearhead Posts: 761
From:
Registered: Jul 2001
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posted 03-29-2003 09:24 PM
quote:
Originally posted by steve'66:
Oh yeah, plenty big for a n20 shot. SteveW
Sweet. Gracias.
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Fstln69
Gearhead Posts: 550
From: Westmont,il
Registered: Jan 2003
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posted 04-01-2003 04:16 AM
How much nitrous?Isn't that drain hole 1/4npt?if it is i wouldn't say thats enough but i like to MAKE sure theres enough fuel thats the problem with nitrous is fuel and make sure to check flow the regulater.------------------
69 fairlane 351w 12.94@103mph before M&M.. after??
always in search of more HP and faster ET'S Fstln69 Pics Page
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65_289
Gearhead Posts: 761
From:
Registered: Jul 2001
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posted 04-01-2003 10:01 AM
quote:
Originally posted by Fstln69:
How much nitrous?Isn't that drain hole 1/4npt?if it is i wouldn't say thats enough but i like to MAKE sure theres enough fuel thats the problem with nitrous is fuel and make sure to check flow the regulater.
100 to 150 shot. I'll double check the size of the hole.
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Tea'sGrabber
Gearhead Posts: 276
From: Seattle, Wash.
Registered: Feb 2003
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posted 04-01-2003 10:02 AM
Alex is right.. The drain is a great way to run a second fuel system. I run a Blue pump with regulator for my carb out of the stock pick-up location. I modified the stock pick-up by putting in 1/2" line. For the nitous side I'm running a Red pump.If you run a Blue pump on the nitrous/drain side you will have too much fuel pressure, because the pump will deadhead at the fuel selenoid.I tried it this way. If you use a Red pump you will get about 5psi at the selenoid.I tried running the Red punp with a regulator to be able to adjust the pressure and that caused problems.Since I removed the regulator it works great!! Save your $$$ and by the Red pump... ------------------
Todd 71 Mav Grabber All orig 306 cu.in. Cast Iron heads. Carillo Rods.Best et. 10.71 @ 124 thru the mufflers.
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65_289
Gearhead Posts: 761
From:
Registered: Jul 2001
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posted 04-01-2003 10:04 AM
quote:
Originally posted by Tea'sGrabber:
Alex is right.. The drain is a great way to run a second fuel system. I run a Blue pump with regulator for my carb out of the stock pick-up location. I modified the stock pick-up by putting in 1/2" line. For the nitous side I'm running a Red pump.If you run a Blue pump on the nitrous/drain side you will have too much fuel pressure, because the pump will deadhead at the fuel selenoid.I tried it this way. If you use a Red pump you will get about 5psi at the selenoid.I tried running the Red punp with a regulator to be able to adjust the pressure and that caused problems.Since I removed the regulator it works great!! Save your $$$ and by the Red pump...
Well, I already have a 2nd blue. So I figured I would just regulate that one down to 6 or 7 psi for the nitrous. Would that cause a problem?
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Fstln69
Gearhead Posts: 550
From: Westmont,il
Registered: Jan 2003
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posted 04-01-2003 08:25 PM
Regulate the pressure by check flow.What i mean is you want to check the pressure as if it is flowing with solenoid open and spraying through spray bar.I have an extra plate so i put in the jet im going to use then put the plate in a bucket and activate the solenoid.Then check to see what the pressure is and adjust it from there.6-7 static psi depending on jet size may only be 4psi when spraying and thats not good.You want 5.5psi when solenoid is open and gas is flowing through spray bars and jet.
Dennis ------------------
69 fairlane 351w 12.94@103mph before M&M.. after??
always in search of more HP and faster ET'S Fstln69 Pics Page
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