AC Delco fuel filter vs Fram
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
AC Delco fuel filter vs Fram
I had read on the Forum in a post some time back that the AC Delco fuel filter had a larger inlet than the Fram filter. Today I changed the Fram for a new AC Delco. The opening on the AC Delco measured .389". The Fram measured .399". Applying some shade tree logic to this, I don't think it matters at all. The fuel line fits inside this opening and dumps the fuel into the inside of the filter. The inside diameter of the fuel line restricts the flow, not the inlet or outlet size of the filters.
I don't know what the inside of these two filters are like. I will save the Fram and when I next replace the filter I will take the two of them apart to see what is inside.
I don't know what the inside of these two filters are like. I will save the Fram and when I next replace the filter I will take the two of them apart to see what is inside.
Safety Car
Joined: Dec 2008
Posts: 3,588
Likes: 10
From: North New Jersey
Interesting... All I know is I wont run Fram anything after the bad stuff I have heard and read... I try and use AC Delco for everything I can 
I wish I took pics of the inside of my original fuel filter. I took it apart out of curiosity, and it looked like a paper element and not much more...
I wish I took pics of the inside of my original fuel filter. I took it apart out of curiosity, and it looked like a paper element and not much more...
Le Mans Master
Joined: Feb 1999
Posts: 6,470
Likes: 2
From: levittown pa. usa Even a bad day with my `Vette, is better than a good day at work
St. Jude Donor '10
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
About a year ago I reported on here about a Fram Gas filter that the inside came loose and was blocking fuel flow so that the car was bucking going down the road. I was lucky that it happened within a week after putting it on so the first thing I checked was the filter, or I could of had a real hard time figuring out what was wrong.. I will never ever again put anything with the name Fram on any car I own,,Period...WW
Last edited by WW7; Jan 9, 2011 at 09:51 PM.
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Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
I have been using Fram oil filters on my other cars for 40+ years without a problem. The information on the fuel filter from the old search indicated that the larger opening on the AC Delco would flow more fuel. That is why I measured it, only to find that the Delco filter was smaller. But as I indicated, the lines pass thru the opening and dump the fuel directly into the filter. I will take both of them apart sometime to see what differences there are....will take pictures.
Warning, this will take time. I usually change the FF every 10,000 miles.
Warning, this will take time. I usually change the FF every 10,000 miles.
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
I have been using Fram oil filters on my other cars for 40+ years without a problem. The information on the fuel filter from the old search indicated that the larger opening on the AC Delco would flow more fuel. That is why I measured it, only to find that the Delco filter was smaller. But as I indicated, the lines pass thru the opening and dump the fuel directly into the filter. I will take both of them apart sometime to see what differences there are....will take pictures.
Warning, this will take time. I usually change the FF every 10,000 miles.
Warning, this will take time. I usually change the FF every 10,000 miles.
Willie
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
About a year ago I reported on here about a Fram Gas filter that the inside came loose and was blocking fuel flow so that the car was bucking going down the road. I was lucky that it happened within a week after putting it on so the first thing I checked was the filter, or I could of had a real hard time figuring out what was wrong.. I will never ever again put anything with the name Fram on any car I own,,Period...WW
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Quality of AC Delco filters and other products have gotten bad too.
All made in China.
K & N Filters Or MOROSO are only choices I make in Filters anymore.
Made in the USA and Tested under severe real world racing conditions.
Not made and tested in China with China's government smiling and laughing knowing their junk will help blow up all American Cars and Racecars.
You get what you pay for anymore.
Low cost ='s China parts.
High Cost ='s American Made parts. Steel and raw materials sourced and produced in the USA.
I choose to pay more for USA.
Most dont anymore. You get China crap instead.
All made in China.
K & N Filters Or MOROSO are only choices I make in Filters anymore.
Made in the USA and Tested under severe real world racing conditions.
Not made and tested in China with China's government smiling and laughing knowing their junk will help blow up all American Cars and Racecars.
You get what you pay for anymore.
Low cost ='s China parts.
High Cost ='s American Made parts. Steel and raw materials sourced and produced in the USA.
I choose to pay more for USA.
Most dont anymore. You get China crap instead.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Quality of AC Delco filters and other products have gotten bad too.
All made in China.
K & N Filters Or MOROSO are only choices I make in Filters anymore.
Made in the USA and Tested under severe real world racing conditions.
Not made and tested in China with China's government smiling and laughing knowing their junk will help blow up all American Cars and Racecars.
You get what you pay for anymore.
Low cost ='s China parts.
High Cost ='s American Made parts. Steel and raw materials sourced and produced in the USA.
I choose to pay more for USA.
Most dont anymore. You get China crap instead.
All made in China.
K & N Filters Or MOROSO are only choices I make in Filters anymore.
Made in the USA and Tested under severe real world racing conditions.
Not made and tested in China with China's government smiling and laughing knowing their junk will help blow up all American Cars and Racecars.
You get what you pay for anymore.
Low cost ='s China parts.
High Cost ='s American Made parts. Steel and raw materials sourced and produced in the USA.
I choose to pay more for USA.
Most dont anymore. You get China crap instead.
AC Delco filters use to have a very good reputation, now almost all the tests done show them near the bottom of the pile..WW
Safety Car
Joined: May 2002
Posts: 4,010
Likes: 26
From: Somewhere nowhere
Much of the recent AC/Delco stuff is now made in Mexico.
Fuel filters every 10k is a bit extreme. I used to do every year, and I never lost a fuel pump. Now I do every 2 years, and I still never lost a fuel pump.
I have used every brand of FF, and never noticed a difference in my 5 vehicles I service.
Fuel filters every 10k is a bit extreme. I used to do every year, and I never lost a fuel pump. Now I do every 2 years, and I still never lost a fuel pump.
I have used every brand of FF, and never noticed a difference in my 5 vehicles I service.
Team Owner
Joined: Jul 2003
Posts: 24,650
Likes: 8
Good friend of mine had a 355 built for his Elcamino SS, good running engine, he broke it in easy, put a few thousand miles on it, put on an ACdelco...3-4K later he changed the oil again and put on a fram.
Week later his wife drives up and the car is barely running, lifters are collapsed, shuts it off...and it seized.
Towed it to the builder and they pulled the engine, total loss, mains were spun badly, they assumed the pump had failed, until they cut open the filterI saw it in person and it looked like the filter media had come apart and it was all f'ed up inside the canister....espensive lesson.
50K miles on engine #2 and only uses K&N filters...runnin good.
This is enough reason for me to run from FRAM products, because its not the first time Ive heard of their products failing.
Week later his wife drives up and the car is barely running, lifters are collapsed, shuts it off...and it seized.
Towed it to the builder and they pulled the engine, total loss, mains were spun badly, they assumed the pump had failed, until they cut open the filterI saw it in person and it looked like the filter media had come apart and it was all f'ed up inside the canister....espensive lesson.
50K miles on engine #2 and only uses K&N filters...runnin good.
This is enough reason for me to run from FRAM products, because its not the first time Ive heard of their products failing.
