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914World.com _ The Paddock _ Holly fuel pump
Posted by: eimc Aug 3 2014, 05:21 PM
Iam running a holly red fuel pump on my 914-6 race car . It's a 2.2 with 40mm webers.I had hesitation problems after about 4 laps at pittsburgh grand prix. I cleaned the idle(progresion) jets( 4were clogged) started the car and it sounded ok. As I was checking in the trunk for fuel leaks I felt the fuel pump and it was hot. Then I checked the fuel pressure at the regulator and it was 3 pounds . Checked both fuel filters and cleaned , blew air in all lines to check for restrictions and everything ok. Mounted another holly red fuel pump and ran for 10 minutes and it was hot to the touch also and fuel pressure would not go above 3 pounds. I presume pressure should be 6 to 9 pounds ? Anyone have any opions? Thanks Paul
Posted by: Matt Romanowski Aug 3 2014, 07:18 PM
I have a Holly blue pump and it's always hot. I thought it was going bad but maybe they just run real hot?
Posted by: vintage914racer Aug 3 2014, 08:56 PM
I have a holley blue and it is also hot to the touch after a session on the track. I think it's just he nature of these pumps.
Posted by: eimc Aug 4 2014, 08:04 AM
Iam running a holly red fuel pump on my 914-6 race car . It's a 2.2 with 40mm webers.I had hesitation problems after about 4 laps at pittsburgh grand prix. I cleaned the idle(progresion) jets( 4were clogged) started the car and it sounded ok. As I was checking in the trunk for fuel leaks I felt the fuel pump and it was hot. Then I checked the fuel pressure at the regulator and it was 3 pounds . Checked both fuel filters and cleaned , blew air in all lines to check for restrictions and everything ok. Mounted another holly red fuel pump and ran for 10 minutes and it was hot to the touch also and fuel pressure would not go above 3 pounds. I presume pressure should be 6 to 9 pounds ? Anyone have any opions? Thanks Paul
What pressures would you run ? Yhanks Paul
Posted by: slivel Aug 4 2014, 10:24 AM
Iam running a holly red fuel pump on my 914-6 race car . It's a 2.2 with 40mm webers.I had hesitation problems after about 4 laps at pittsburgh grand prix. I cleaned the idle(progresion) jets( 4were clogged) started the car and it sounded ok. As I was checking in the trunk for fuel leaks I felt the fuel pump and it was hot. Then I checked the fuel pressure at the regulator and it was 3 pounds . Checked both fuel filters and cleaned , blew air in all lines to check for restrictions and everything ok. Mounted another holly red fuel pump and ran for 10 minutes and it was hot to the touch also and fuel pressure would not go above 3 pounds. I presume pressure should be 6 to 9 pounds ? Anyone have any opions? Thanks Paul
What pressures would you run ? Yhanks Paul
I run A Holley Blue and two regulators. The first regulator is a Holley 4.5 - 9 psi bypass type located near the pump and I return the unused fuel to the tank to keep it and the pump cool. The second regulator is in the engine compartment and is a Holley 1 - 4 psi non-bypass type that is set to 3.5 psi. This works well with my Webber 46's.
Steve
Posted by: J P Stein Aug 4 2014, 11:00 AM
I put a Facet pump in with no regulator. (noisy sumbitch)....fully expecting it to be a temporary thing. It was still there when I sold the car 12 years later.
Bog simple is good.....cheep too. 40 mm Webers with 4.5 psi of pressure with no problems. The pic is about 8 years into its life.
Posted by: ETMracing Aug 11 2014, 03:05 PM
What do you all use for thread sealant on fuel items?
Posted by: stownsen914 Aug 11 2014, 03:35 PM
What do you all use for thread sealant on fuel items?
I just did some research on this after having an issue with a pressure regulator not sealing properly at the NPT fittings. I ended up choosing a thread sealant that Earl's sells. Some said that teflon tape and liquid sealant were OK, others said not. The Earl's stuff is meant for sealing fittings for fuel and oil applications on car plumbing, so I figured their stuff should be a good choice.
Posted by: campbellcj Aug 11 2014, 09:05 PM
I can't remember if I used the special sealant goo or regular teflon tape...but years later I have zero leaks. I'm running a Holley Red with no regulator. I used to have a regulator and gauge but my mechanic/builder removed it saying it was unnecessary with this pump and my setup. This is the low pressure (6-7psi) pump designed for carbs; with the Blue pump (11psi) you definitely need a regulator, or a different pump.
Posted by: jd74914 Aug 12 2014, 07:41 AM
I've used both regular teflon tape and pipe dope; both work fine. I'm a bigger fan of teflon tape because it's easier to take off the fittings if you are reusing them and is dry at application.
Posted by: brant Aug 12 2014, 08:52 AM
AN fittings seal on their matting face
BY DESIGN
no tape necessary
Posted by: J P Stein Aug 12 2014, 09:12 PM
IIRC, I had 3-4 NPT connections....the rest were AN. I used tape on the NPTs but was damn careful not the let any teflon hang over into the joint. The fuel block was downstream of the filter.
Posted by: campbellcj Aug 12 2014, 10:23 PM
Likewise - tape only on the pipe threads. Brant is right about AN fittings. Good ones fit precisely and don't leak without any tape or goo.
Posted by: Racer Chris Aug 13 2014, 07:55 AM
I generally avoid using teflon tape on oil and fuel fittings due to the possibility of getting some into the line.
I use Permatex pipe sealant where I don't use tape.
Posted by: ETMracing Aug 14 2014, 02:43 PM
Sounds good to me, I knew the AN lines should seal tight but I have not switched over to them yet..just use NPT now. I will try some purposed Sealant again but if not I might work with some Tape.
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