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Recommended fuel pump and fuel pressure for Weber 40s?


HarryPR

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Trying to help out a local friend who is about to install two Weber 40's in his '73 2002.

What fuel pump and regulator do you guys find out to be the best based on your experiences? Also, what is the recommended fuel pressure for dual 40's?

TIA,

HarryPR

BMWCCA #19290

 

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3-5psi, plenty of generic electric pumps out there , dont forget to circuit in a cut out on non start but ignition still on .

72/2002 Inca

72tii/2002 "Apple"

70/2002 "Five "

73/2002 "Freeda"

2007 Lotus 7 Replica

2011 Ford xr6 Ute

85 E30 325

70 1600-2 "Orange"

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3-5psi, plenty of generic electric pumps out there , dont forget to circuit in a cut out on non start but ignition still on .

72/2002 Inca

72tii/2002 "Apple"

70/2002 "Five "

73/2002 "Freeda"

2007 Lotus 7 Replica

2011 Ford xr6 Ute

85 E30 325

70 1600-2 "Orange"

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3-5psi, plenty of generic electric pumps out there , dont forget to circuit in a cut out on non start but ignition still on .

72/2002 Inca

72tii/2002 "Apple"

70/2002 "Five "

73/2002 "Freeda"

2007 Lotus 7 Replica

2011 Ford xr6 Ute

85 E30 325

70 1600-2 "Orange"

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Harry,

I have been running the Carter P4070 for years, first with my Weber 40/40 DFAV and now with the Mikuni 44PHH dual sidedrafts. The pump works great.

Earl

74 02Lux

02 M Roadster

72 Volvo 1800es

74 02Lux

15 M235i

72 Volvo 1800ES

People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- George Orwell

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i have Mikuni's too. great performace..! and Bosch fuel pump.

Vin # 1567904. 69 Golf 1600-2

Vin # 1689995. 70 Golf 2002 ti

Vin # 3751763. 75 Golf 2002

Others.

1990 Ferrari 512m

1985 Lamborghini Countach Lp 500

1997.5 Hummer H1.

Dreaming about Audi R8 biturbo

Carlos.

Punta Cana. Dominican Republic.

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Harry,

no need to carried away. the stock mechanical pump is just fine. you may have a clearance issue depending on the intake manifolds selected, but the stock pump puts out plenty of fuel.

you can avoid the clearance issue by getting the shorter pump rod and filing the pump spacer block down to about 7 or 8 mm thick. then the pump sits tighter tot he head and will not pump the webers. this is what is running on my '70 with the dual webers.

note that the stock ti with dual solexes runs the stock pump, and i ran my ti for decades on the webers with the stock pump with no issue.

why bother wiring up a noisy electric pump? why make things more complicaed than they need to be?

just my $0.02 worth...

Jon

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Harry,

no need to carried away. the stock mechanical pump is just fine. you may have a clearance issue depending on the intake manifolds selected, but the stock pump puts out plenty of fuel.

note that the stock ti with dual solexes runs the stock pump, and i ran my ti for decades on the webers with the stock pump with no issue.

why bother wiring up a noisy electric pump? why make things more complicaed than they need to be?

just my $0.02 worth...

Jon

+1 I think stock mechanical pumps have gotten a bad reputation over the years (misunderstood perhaps or just inferior quality replacement junk?).

Jim Gerock

 

Riviera 69 2002 built 5/30/69 "Oscar"

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Great info.

I've never had side drafts, but the mechanical pump on the '02 I sold last year was/is 25 years old and still working like a champ. I think the new owner is installing some Webers on it until he can get an S14 for it.

HarryPR

BMWCCA #19290

 

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I've always liked the big six mechanical fuel pumps on heads that still have a boss for them.

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,294242

For cars that have heads that lack the mounting for mechanical pumps I use this Pierburg electric one, nice and quiet...

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,307681

Tom Jones

BMW wrench for 30 years, BMWCCA since 1984 at age 9
66 BMW16oo stored, 67 1600-2 lifelong project, 2 more 67-8 1600s, 86 528e 5sp 586k, 91 318i
Mom&Dad's, 65 1800TiSA, 70 2800, 72 2002Tii 2760007 orig owners, 15 Z4 N20

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