Mr Gasket 4-7 PSI for Weber IDF too much pressure? |
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Mr Gasket 4-7 PSI for Weber IDF too much pressure? |
Tdskip |
Apr 3 2021, 07:31 PM
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#1
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
This for a car that us set up with a front trunk mounted fuel pump (prior owner) that I suspect needs the Facet pump replaced. I know the low range of 4 PSI is fine but am concerned that the upper range list on the pump is too much.
Thanks and hope everyone has had a good Saturday. |
bdstone914 |
Apr 3 2021, 09:10 PM
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#2
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bdstone914 Group: Members Posts: 4,531 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
This for a car that us set up with a front trunk mounted fuel pump (prior owner) that I suspect needs the Facet pump replaced. I know the low range of 4 PSI is fine but am concerned that the upper range list on the pump is too much. Thanks and hope everyone has had a good Saturday. Is there a fuel pressure regulator? Every set of carbs is different. I had a set that had to be dialed down to 2.5 psi to not overflow. |
914forme |
Apr 3 2021, 09:11 PM
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#3
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Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None |
3.5 lbs is what your carbs want.
CB Performance Rotary I have one sitting on my bench I will not be using PM me we can work out a deal. |
9146C |
Apr 4 2021, 06:49 AM
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#4
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Member Group: Members Posts: 228 Joined: 14-September 19 From: US Member No.: 23,460 Region Association: None |
I agree with Bruce above...always try to regulate fuel pressure ahead of the carbs.
Attached is a photo of my regulator set up with dual 40 Webers...set to 3-1/2 psi (with a gauge on the regulator). I just went with the Delphi FD0037 fuel pump from Napa...we'll see how that works in the long run. It's an all-metal pump case with 1/4" NPT fittings on both ends...allows different size barbed ends (available at any hardware store) to be fitted on each end depending on fuel line size. Attached thumbnail(s) |
930cabman |
Apr 4 2021, 07:29 AM
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#5
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Advanced Member Group: Members Posts: 3,130 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
My experience is Webers are happy in the 2.5 - 3.5 psi range.
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Tdskip |
Apr 4 2021, 08:52 AM
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#6
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
Thanks gentlemen
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VaccaRabite |
Apr 5 2021, 07:04 AM
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#7
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En Garde! Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
At about 5 pounds you will overcome the floats and flood the carbs with fuel. BTDT.
The pump will work but you will need to have a regulator in line. Zach |
porschetub |
Apr 5 2021, 03:02 PM
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#8
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Advanced Member Group: Members Posts: 4,703 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
At about 5 pounds you will overcome the floats and flood the carbs with fuel. BTDT. The pump will work but you will need to have a regulator in line. Zach (IMG:style_emoticons/default/agree.gif) for some reason my Carter/CB pump ran more pressure than the max listed unregulated with a quality gauge,set up the pressure to 3.5psi and got a small amount of spill over from the fuel bowls,reset to just over 3 psi and haven't had any issues since. When I rebuilt my carbs I did a bench setup to make sure the float levels were to spec using the PMO level gauge,found this very handy as was pleased to see they were correct with the new washers and float valves from the kit,its also a good thing to measure the pump delivery on each throat. Setting the pump delivery was a PTA due to the system on the Zeniths but got there in the end. In summary pump pressure is important but float levels must be even also,good luck Tom. |
930cabman |
Apr 5 2021, 04:01 PM
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#9
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Advanced Member Group: Members Posts: 3,130 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
At about 5 pounds you will overcome the floats and flood the carbs with fuel. BTDT. The pump will work but you will need to have a regulator in line. Zach (IMG:style_emoticons/default/agree.gif) for some reason my Carter/CB pump ran more pressure than the max listed unregulated with a quality gauge,set up the pressure to 3.5psi and got a small amount of spill over from the fuel bowls,reset to just over 3 psi and haven't had any issues since. When I rebuilt my carbs I did a bench setup to make sure the float levels were to spec using the PMO level gauge,found this very handy as was pleased to see they were correct with the new washers and float valves from the kit,its also a good thing to measure the pump delivery on each throat. Setting the pump delivery was a PTA due to the system on the Zeniths but got there in the end. In summary pump pressure is important but float levels must be even also,good luck Tom. Yes and yes, carbs Will require some fiddling and float levels are very important. Once they are dialed in (and it can be a process) they can be frustrating, but satisfying at the same time. |
Tdskip |
Apr 5 2021, 06:02 PM
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#10
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
Thanks for all the information and responses.
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porschetub |
Apr 6 2021, 02:46 PM
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#11
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Advanced Member Group: Members Posts: 4,703 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
At about 5 pounds you will overcome the floats and flood the carbs with fuel. BTDT. The pump will work but you will need to have a regulator in line. Zach (IMG:style_emoticons/default/agree.gif) for some reason my Carter/CB pump ran more pressure than the max listed unregulated with a quality gauge,set up the pressure to 3.5psi and got a small amount of spill over from the fuel bowls,reset to just over 3 psi and haven't had any issues since. When I rebuilt my carbs I did a bench setup to make sure the float levels were to spec using the PMO level gauge,found this very handy as was pleased to see they were correct with the new washers and float valves from the kit,its also a good thing to measure the pump delivery on each throat. Setting the pump delivery was a PTA due to the system on the Zeniths but got there in the end. In summary pump pressure is important but float levels must be even also,good luck Tom. Yes and yes, carbs Will require some fiddling and float levels are very important. Once they are dialed in (and it can be a process) they can be frustrating, but satisfying at the same time. IMO float level setting are secondary after the right fuel pressure is within spec otherwise its an issue,some rebuild kits have "knock off" float valves which in my experience don't hold pressure very well,had this with a Weber kit ,put the original Weber ones in a issue was gone. |
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