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29-07-2013, 04:25 PM
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#1
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Registered User
Join Date: Aug 2011
Posts: 92
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Fuel regulatior xr2
Hi can you help? We have an old xr2 that had an old holly fuel pump and regulatior attached witch packed up throw old age!! So we have bought a new holly pump and put an inline fuel regulatior but it seems to be causing havoc with over fueling and flooding etc! Dose it have to be a pacific regulatior???? And also could we of damaged the carbs in any way???? Thanks for your time! Rob
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29-07-2013, 06:05 PM
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#2
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Registered User
Country: UK
Location: Surrey
Occupation: Motorsport Development inc Engine Managment
Boat make: 21ft
Engines: Various
Cruising area: Solent / Kent / Cornwall
Join Date: Oct 2011
Location: Surrey
Posts: 375
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I gather you have a fuel pressure gauge? What are your readings?
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29-07-2013, 08:17 PM
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#3
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Registered User
Join Date: Aug 2011
Posts: 92
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Hi we have a manual regulatior with settings from 1to5/12 psi we were told to set at 5psi but it must push 5 psi as soon as the key is on and floods may be its not up to the job??
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29-07-2013, 10:58 PM
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#4
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Senior Member
Country: UK
Location: Devon
Occupation: Garage Proprietor
Interests: PowerBoat Racing
Boat name: If Only
Boat make: Bernico F3 OCR, Bernico Prototype Inboard, and some Ribs
Engines: Yamaha Pro V 115
Cruising area: UK, France
Join Date: Jan 2005
Location: Devon
Posts: 3,095
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If its flooding at 5 psi you have a float needle issue !!
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If Only
National Outboard Immersed Propeller Mono Record 103mph
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30-07-2013, 09:04 AM
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#5
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Or its not 5psi, I dont like dead head regulators as the pressure will equalize on the low pressure side if not being used fast enough.
What colour holley pump are you using? Ive never used a regulator with a holley red pump, they should be self regulating at 5 psi.
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30-07-2013, 06:44 PM
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#6
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Registered User
Join Date: Aug 2011
Posts: 92
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Hi it's a red top holly may be its a carb issue rather than regulator issue and it just bad timing on are part!! Do you recommend not using a regulatior at all??? Will it be ok at low speed? Any advice welcom!!! Thanks!!
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30-07-2013, 07:02 PM
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#7
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Registered User
Country: UK
Location: Coventry (but from Lee on Solent)
Occupation: Sales Director
Interests: My Boat of course
Boat make: Extreme 21
Engines: Merc V8
Cruising area: Solent
Join Date: Jul 2005
Location: Coventry (but from Lee on Solent)
Posts: 587
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Quote:
Originally Posted by rob lister
Hi it's a red top holly may be its a carb issue rather than regulator issue and it just bad timing on are part!! Do you recommend not using a regulatior at all??? Will it be ok at low speed? Any advice welcom!!! Thanks!!
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If its is the right spec pump, no regulator is required. I believe Xr2s were supplied with an electric marine holly red but I believe the specs are different to a standard red.
http://www.holley.com/12-801-1.asp
http://www.holley.com/712-801-1.asp
Can't recall the specified psi but I'm sure it's on here somewhere if you search. Holley do lots of pumps though so worth checking you have the right spec. Was it bought new?
Plus, what bob said...
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The Docta
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30-07-2013, 08:21 PM
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#8
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Registered User
Country: UK
Location: Surrey
Occupation: Motorsport Development inc Engine Managment
Boat make: 21ft
Engines: Various
Cruising area: Solent / Kent / Cornwall
Join Date: Oct 2011
Location: Surrey
Posts: 375
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I just got one of these http://www.glencoeltd.co.uk/facet-48...uel-pump-1288/ and had them put in a 4/5psi spring. No regulator needed
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