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Re: [GMCnet] Carb fuel filters [message #327190 is a reply to message #327189] Sat, 16 December 2017 21:43 Go to previous messageGo to next message
Richard Denney is currently offline  Richard Denney   United States
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Registered: April 2010
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Senior Member
Google told me the Mr. Gasket metal-can filters I bought a couple years ago
are 40 microns, so they will stay on the shelf. The Wix 33033, which
crosses with the Fram G15 and the Luberfiner G3/8, is rated at 20
microns--not quite as fine as I remembered. But it's fine enough as a
primary filter.

But those AN-6 filters at Summit usually have the micron rating in their
product descriptions.

Rick "but they aren't cheap" Denney


On Sat, Dec 16, 2017 at 8:03 PM Jim Kanomata wrote:

> Rick,
> Where were you able to obtain the Micron ratings of each filters?
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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Re: [GMCnet] Carb fuel filters [message #327202 is a reply to message #327180] Sun, 17 December 2017 08:02 Go to previous messageGo to next message
Chris Tyler is currently offline  Chris Tyler   United States
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Location: Odessa FL
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k2gkk wrote on Sat, 16 December 2017 15:17
Hi, Chris.


Do you have a source and part number for that Pyrex bowl filter? Sounds like an excellent suggestion.

D C "Mac" Macdonald

https://www.ebay.com/itm/8-mm-5-16-Universal-Fuel-Filter-Glass-Petrol-Inline-Reusable-Car-Motorcycle/263037801143?_trkparms=aid%3D555018%26algo%3DPL.S IM%26ao%3D2%26asc%3D49564%26meid%3De1f9dc7a62a24c1db4bd0a5fa9798dac%26pid%3D100005%26rk%3D4%26rkt%3D6%26sd%3D172471507867&_trksid=p2047675.c100005 .m1851

Here is a 5/15 one. More common in parts stores is the Spector version with multple size nylon fittings
I have run one of these typeon all of my carb vehicles

To be more clear, Im not advocating removal of the carb filter ! This is a 'pre-filter' ,if you will


________________________________
From: Gmclist on behalf of Chris Tyler
Sent: Saturday, December 16, 2017 15:00
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Carb fuel filters

Its tempting to simply eliminate the carb filter and go with an inline external filter as they are difficult to access. many a Qjet has been discarded
with boogered threads when people have done it wrong.
BTW there is [or at least was] a kit to repair that.
I run an View -all Pyrex glass filter at a low point before the fuel pump with fuel injection rated hose and double clamps. The plastic ones discolor
with age and become opaque. This enables a visual check of the filter and for water issues as well as a easy drain point with the electric pump. Never
had a leak; if it did it will leak on the ground rather than hot engine components.
In the high performance world the filters are almost always removed as they are a fuel restriction at high flow [especially the pressed brass pettet
type]- more than we will ever need for our application though.
Problem is, stuff can still sloth of at the pump or line and you risk sticking the needle and seat.
For that reason I still have the paper element in place just in case- which with the pre filter should last a long time
--
76 Glenbrook

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76 Glenbrook
Re: [GMCnet] Carb fuel filters [message #327203 is a reply to message #327202] Sun, 17 December 2017 09:02 Go to previous messageGo to next message
emerystora is currently offline  emerystora   United States
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Registered: January 2004
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Senior Member
I thought a see through glass filter sounded great so I put one on years ago but it was broken by a stone or something. I replaced it with a metal one.

Emery Stora
77 Kingsley
Frederick, CO

> On Dec 17, 2017, at 7:02 AM, Chris Tyler wrote:
>
> k2gkk wrote on Sat, 16 December 2017 15:17
>> Hi, Chris.
>>
>>
>> Do you have a source and part number for that Pyrex bowl filter? Sounds like an excellent suggestion.
>>
>> D C "Mac" Macdonald
>>
>>
>> https://www.ebay.com/itm/8-mm-5-16-Universal-Fuel-Filter-Glass-Petrol-Inline-Reusable-Car-Motorcycle/263037801143?_trkparms=aid%3D555018%26algo%3DPL.S
>> IM%26ao%3D2%26asc%3D49564%26meid%3De1f9dc7a62a24c1db4bd0a5fa9798dac%26pid%3D100005%26rk%3D4%26rkt%3D6%26sd%3D172471507867&_trksid=p2047675.c100005
>> .m1851
>>
>> Here is a 5/15 one. More common in parts stores is the Spector version with multple size nylon fittings
>> I have run one of these typeon all of my carb vehicles
>>
>> To be more clear, Im not advocating removal of the carb filter ! This is a 'pre-filter' ,if you will
>>
>>
>> ________________________________
>> From: Gmclist on behalf of Chris Tyler
>> Sent: Saturday, December 16, 2017 15:00
>> To: gmclist@list.gmcnet.org
>> Subject: Re: [GMCnet] Carb fuel filters
>>
>> Its tempting to simply eliminate the carb filter and go with an inline external filter as they are difficult to access. many a Qjet has been
>> discarded
>> with boogered threads when people have done it wrong.
>> BTW there is [or at least was] a kit to repair that.
>> I run an View -all Pyrex glass filter at a low point before the fuel pump with fuel injection rated hose and double clamps. The plastic ones
>> discolor
>> with age and become opaque. This enables a visual check of the filter and for water issues as well as a easy drain point with the electric pump.
>> Never
>> had a leak; if it did it will leak on the ground rather than hot engine components.
>> In the high performance world the filters are almost always removed as they are a fuel restriction at high flow [especially the pressed brass
>> pettet
>> type]- more than we will ever need for our application though.
>> Problem is, stuff can still sloth of at the pump or line and you risk sticking the needle and seat.
>> For that reason I still have the paper element in place just in case- which with the pre filter should last a long time
>> --
>> 76 Glenbrook
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> --
> 76 Glenbrook
>
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Re: Carb fuel filters [message #327207 is a reply to message #327121] Sun, 17 December 2017 12:05 Go to previous messageGo to next message
Scott Nutter is currently offline  Scott Nutter   United States
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Still waiting for a answer on check valve/flapper vs non check valve/flapper carb filters on the advantages. Or maybe I missed it in a post?
Thanks, Scott.


Scott Nutter 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI Houston, Texas
Re: [GMCnet] Carb fuel filters [message #327209 is a reply to message #327207] Sun, 17 December 2017 12:39 Go to previous messageGo to next message
Richard Denney is currently offline  Richard Denney   United States
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Registered: April 2010
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I think the idea behind the check valve is to keep the carb from draining
back into the tank when the engine is off. I just can't imagine that it's
needed in our application--doesn't the mechanical pump already have a check
valve?

I've bypassed both the carb filter and the mechanical pump, but I have an
electric pump that gets fuel to the carb when the ignition is on.

Rick "wondering if the change was driven by another application" Denney

On Sun, Dec 17, 2017 at 1:06 PM Scott Nutter wrote:

> Still waiting for a answer on check valve/flapper vs non check
> valve/flapper carb filters on the advantages. Or maybe I missed it in a
> post?
> Thanks, Scott.
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi.
> Houston, Texas
>
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> Unsubscribe or Change List Options:
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>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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Re: [GMCnet] Carb fuel filters [message #327210 is a reply to message #327209] Sun, 17 December 2017 12:55 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
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Senior Member
I'm with Rick on this one. The check valve allows fuel to enter the carb,
and prevents back flow. Of no issue, really, because Quadrajet carbs on
Olds engines with active exhaust crossovers will boil off todays fuel in
the float chamber upon shut down. That, except for the amount that doesn't
leak out the bottom through the leaky BB shot plugs, in the bottom of the
float chamber. California equipped coaches have another (2) charcoal
canister plumbed into the Carb bowl vent to reclaim this venting. Lots more
hoses for little gain.
Jim Hupy
Salem, Or
78 GMC Royale 403 (49 state emissions equipped)

On Sun, Dec 17, 2017 at 10:39 AM, Richard Denney wrote:

> I think the idea behind the check valve is to keep the carb from draining
> back into the tank when the engine is off. I just can't imagine that it's
> needed in our application--doesn't the mechanical pump already have a check
> valve?
>
> I've bypassed both the carb filter and the mechanical pump, but I have an
> electric pump that gets fuel to the carb when the ignition is on.
>
> Rick "wondering if the change was driven by another application" Denney
>
> On Sun, Dec 17, 2017 at 1:06 PM Scott Nutter
> wrote:
>
>> Still waiting for a answer on check valve/flapper vs non check
>> valve/flapper carb filters on the advantages. Or maybe I missed it in a
>> post?
>> Thanks, Scott.
>> --
>> Scott Nutter
>> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21
> final
>> drive, Quad bags, tankless water heater, everything Lenzi.
>> Houston, Texas
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> --
> Rick Denney
> 73 x-Glacier 230 "Jaws"
> Off-list email to rick at rickdenney dot com
> _______________________________________________
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Re: [GMCnet] Carb fuel filters [message #327216 is a reply to message #327202] Sun, 17 December 2017 15:19 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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Location: Hebron, Indiana
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Senior Member
I also believe it was an anti-drainback check valve. All I know is GM changed to that style on ALL GM vehicles,
in 1976, not just on the GMC. To my know ledge they never went back and suggested that earlier vehicles be
changed to the new style / part number.

It is your choice. Use which ever one that you want. I looked up the spec on that filter and it is 20 micron.

I do not have a recommendation. Thousands of GM vehicles have been using both styles for years and years.
I do not remember which style I put in mine. I just wanted to explain the two different part numbers out there.

Ken B


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
Re: Carb fuel filters [message #327218 is a reply to message #327121] Sun, 17 December 2017 15:39 Go to previous messageGo to next message
Scott Nutter is currently offline  Scott Nutter   United States
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Thanks Rick, James, and Ken.
I think I'll go with the non flapper valve filter. I buy in bulk from Amazon, and didn't want to get stuck with the wrong one.
Scott.


Scott Nutter 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI Houston, Texas
Re: [GMCnet] Carb fuel filters [message #327221 is a reply to message #327129] Sun, 17 December 2017 16:02 Go to previous messageGo to next message
emerystora is currently offline  emerystora   United States
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Senior Member
If you have a rollover you’ve got a lot more to worry about that a tiny amount of fuel from the carb. And where would that fuel go? Back into the fuel line I imagine.

Emery Stora

> On Dec 17, 2017, at 2:59 PM, Will wrote:
>
> I thought the check valve was for a roll over scenario to ensure that fuel
> does not siphon out. I could be wrong.
>
> We all have old chevy mechanics in the family... My father restores
> corvettes for the past 40 years and was quick to advise removal of the
> check valve as they have been known to fail. All hearsay as far as I know.
>
>
>
>> On Dec 17, 2017 4:40 PM, "Scott Nutter" wrote:
>>
>> Thanks Rick, James, and Ken.
>> I think I'll go with the non flapper valve filter. I buy in bulk from
>> Amazon, and didn't want to get stuck with the wrong one.
>> Scott.
>> --
>> Scott Nutter
>> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
>> drive, Quad bags, tankless water heater, everything Lenzi.
>> Houston, Texas
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
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Re: [GMCnet] Carb fuel filters [message #327222 is a reply to message #327218] Sun, 17 December 2017 15:59 Go to previous messageGo to next message
Will Albers is currently offline  Will Albers   United States
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Location: Detroit MI (Belleville)
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I thought the check valve was for a roll over scenario to ensure that fuel
does not siphon out. I could be wrong.

We all have old chevy mechanics in the family... My father restores
corvettes for the past 40 years and was quick to advise removal of the
check valve as they have been known to fail. All hearsay as far as I know.



On Dec 17, 2017 4:40 PM, "Scott Nutter" wrote:

> Thanks Rick, James, and Ken.
> I think I'll go with the non flapper valve filter. I buy in bulk from
> Amazon, and didn't want to get stuck with the wrong one.
> Scott.
> --
> Scott Nutter
> 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final
> drive, Quad bags, tankless water heater, everything Lenzi.
> Houston, Texas
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
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1978 Palm Beach.
Detroit Michigan
Re: [GMCnet] Carb fuel filters [message #327225 is a reply to message #327218] Sun, 17 December 2017 19:12 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Senior Member
Scott,

The filter that is in the rubber line that connects the steel line to the fuel pump inlet in Double Trouble is the same one that has
been there for YEARS! I've been taking it out, blowing through it, noting that it is free flowing; put it back in.

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Scott Nutter
Sent: Monday, December 18, 2017 8:39 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Carb fuel filters

Thanks Rick, James, and Ken.
I think I'll go with the non flapper valve filter. I buy in bulk from Amazon, and didn't want to get stuck with the wrong one.
Scott.


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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: Carb fuel filters [message #327228 is a reply to message #327121] Sun, 17 December 2017 20:31 Go to previous messageGo to next message
Scott Nutter is currently offline  Scott Nutter   United States
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Senior Member
Thanks Rob,
I can appreciate that.
But if I'm going to pull out the old filter I might as well replace it with a new one. They are cheep enough in bulk from Amazon.
I fave a few here for you.
Scott


Scott Nutter 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI Houston, Texas
Re: Carb fuel filters [message #327232 is a reply to message #327121] Sun, 17 December 2017 20:55 Go to previous messageGo to next message
Scott Nutter is currently offline  Scott Nutter   United States
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Registered: January 2015
Location: Houston/San Diego
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Ken B,
The part numbers on Amazon for the Wix are 33048, and 33052. Just Incase.....
Scott.


Scott Nutter 1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, Dave Lenzi super duty mid axle disc brakes, tankless water heater, everything Lenzi. Alex Ferrera installed MSD Atomic EFI Houston, Texas
Re: Carb fuel filters [message #327237 is a reply to message #327232] Sun, 17 December 2017 21:55 Go to previous message
Ken Burton is currently offline  Ken Burton   United States
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Registered: January 2004
Location: Hebron, Indiana
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Scott Nutter wrote on Sun, 17 December 2017 20:55
Ken B,
The part numbers on Amazon for the Wix are 33048, and 33052. Just Incase.....
Scott.



WHOA!!! I screwed up in the original posting. I'll go back and correct
that in the original posting. Emailers will not see it because they do not
see corrections or updates. There is nothing I can do for them.

Thanks again for the correction.

Ken B.


Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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