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55 ragger
Samba Member
Joined: August 18, 2005
Posts: 266
Location: CANADA
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 Posted: Tue Jul 20, 2021 2:43 pm Post subject: Fuel pressure gage? |
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Has anyone installed fuel pressure gages on Weber’s
Your thoughts please?
Just finished this Morrison running much better!
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bsairhead
Samba Member
Joined: October 08, 2008
Posts: 3580
Location: viroqua wi.
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| Posted: Tue Jul 20, 2021 3:21 pm Post subject: Re: Fuel pressure gage? |
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| On a new to me fuel pump I always check but never thought necessary to install a gauge. Looks good but I like the KISS approach and would worry all day about a fuel leak. |
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Tue Jul 20, 2021 4:07 pm Post subject: Re: Fuel pressure gage? |
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I have
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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55 ragger
Samba Member
Joined: August 18, 2005
Posts: 266
Location: CANADA
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| Posted: Tue Jul 20, 2021 6:43 pm Post subject: Re: Fuel pressure gage? |
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I agree one gage face melted! I crafted a new one out of glass
First attempt it cracked . But just realized that the gage seems to be done ?
aeromech looks good nice and neat and a better quality gage .
I still have lots to do as the picture shows .
We have now used the bus for three great camping trips!
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Tue Jul 20, 2021 7:34 pm Post subject: Re: Fuel pressure gage? |
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For the record. Whenever you guys buy gauges for whatever application, you want the gauge to be about half scale for the pressure you’re reading. For instance, carbs like about 3 psi so get a gauge that reads like 0-10 or something like that. It makes for better accuracy. Don’t use a 150 psi oil pressure gauge when your range will be 0-60
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21520
Location: Oklahoma City
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| Posted: Tue Jul 20, 2021 8:40 pm Post subject: Re: Fuel pressure gage? |
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| aeromech wrote: |
| For the record. Whenever you guys buy gauges for whatever application, you want the gauge to be about half scale for the pressure you’re reading. For instance, carbs like about 3 psi so get a gauge that reads like 0-10 or something like that. It makes for better accuracy. Don’t use a 150 psi oil pressure gauge when your range will be 0-60 |
I agree with that....but will also add a little more to it. If you REALLY need a gauge to be of a reasonable accuracy....more than just saying we have pressure .....buy a gauge with a stated rating.
Here is a good basic chart....and there is even a little more than this when you get into high temp gauges etc.
https://www.instrumart.com/pages/539/pressure-gauge-accuracy-grades
For a point of reference...most water pressure gauges from Home depot of the hardware store are class C at best and class D commonly.
Most store bought basic fuel pressure gauges in auto parts stores...usually have no rating....but when testing against known gauges of better accuracy I usually find them to be class B at best.
For tuning fuel injection....I dont like to use anything less than a class 1A.
Ray |
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Tue Jul 20, 2021 8:51 pm Post subject: Re: Fuel pressure gage? |
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I have zero experience placing gauges into classes as Ray describes. All I know that that I want a reasonable quality gauge at a reasonable price. For VWs I generally use VDO brand. Others will bad mouth VDO but through the last 40+ years they have worked well enough for my needs. My earlier point was that a person shouldn’t use a gauge that’s not made to be used within the working range of whatever you’re measuring. I hope my point came across clearly
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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