The fuel line from the fuel pump to the fuel filter on my 63 - 340hp is in contact with the front of the engine block which is probably not a good thing. The "Fuel line from Fuel pump to Carb kits" I see online show a fourth fitting which I don't have. This would be a straight fitting which would mount to the front or rear of the fuel filter. This would move the fuel line to the pump away from the front of the engine block. I've seen several cars without this fitting and my copy of the AIM doesn't show it. Anyone have this fitting and know which side of the filter would be the correct location for it? Thanks
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Re: 63 Fuel Line from Pump to Carburetor
There is a straight fitting you refer to on the fuel pump. You may find the information you are looking for in this thread:
https://www.forums.ncrs.org/showthre...892#post916892 -
Re: 63 Fuel Line from Pump to Carburetor
I also suspect that the reproduction fuel filter that you have is the type that was actually shorter than the original, and or correct reproduction filter. The grooves on the nuts and gloss paint are what makes me think that is the case.Comment
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Re: 63 Fuel Line from Pump to Carburetor
Thank you for the link to that thread. I realize the issue. I got to comparing the picture in the link to my installation and realized that my new GF-90 filter that I installed yesterday is shorter than the one I took off the car. The body of the new AC GF-90 filter I installed is 1/4" shorter than the old AC GF-90 filter and the overall length from end to end of the fittings on the new filter is 1/2" shorter than the old filter. I didn't notice the difference til now. I assumed they were the same. The box it came in is marked 63-67 all except 250hp. Are they being made shorter or did I buy a crappy knock-off for $45. Bought it from a reputable vendor I've been buying from for years. Is AC GF-90 still the correct filter for the 63-340hp engine?Comment
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Re: 63 Fuel Line from Pump to Carburetor
Yes, black GF-90 is correct.Comment
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Re: 63 Fuel Line from Pump to Carburetor
You purchased a repro, that is not correct. I did not know they were still manufacturing them. The paint is wrong, too short, slots in fittings, and even the font is incorrect! The "9" is very noticeable. Look for one that does not have the issues stated, and it comes in a box that looks just like the original GF90 box. It will say GF-90 Black on the box. They are also on eBay.Comment
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Re: 63 Fuel Line from Pump to Carburetor
I prefer not to buy stuff on e-bay. Where else can I get a correct one?Comment
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Re: 63 Fuel Line from Pump to Carburetor
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Re: 63 Fuel Line from Pump to Carburetor
Thank you.Comment
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Re: 63 Fuel Line from Pump to Carburetor
How about this one from Paragon?
https://www.paragoncorvette.com/prod...l-filter-gf-90Comment
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Re: 63 Fuel Line from Pump to Carburetor
So here is a side by side pic of my old filter and the new incorrect filter. There is about 1/2" difference in overall length from end of fitting to end of fitting between the two filters. You'll note that the silk screening on the new filter is nearly gone. I got some gasoline on it and it washed off.
The correct filter should move the gas line which goes down to the pump about 1\2" away from the cylinder head if it is the same length as my old one.
My old filter looks like aftermarket also due to the notches in the fittings and the silk screening may not be correct. Can I get an overall length of a correct filter from someone? End to end of the whole thing including the end fittings. Mine measures about 4"
Thank youComment
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Re: 63 Fuel Line from Pump to Carburetor
Interesting. One has to wonder if they were attempting to save a little bit of steel or just repurposed a different filter?
Having worked in manufacturing the lengths they will go to save part of a penny is nothing short of amazing.
What I need to know is if the screw, in the first photo, is correct? Sorry for the hijack but it may be pertinent?Comment
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Re: 63 Fuel Line from Pump to Carburetor
The screw on the filter bracket? Don't know for sure if that one is correct.
I put the old filter back in until I can get a new one just for more practice. If the new correct filter is about the same length, I'll have 5/8" clear between the back of the fuel pump line and the cylinder head. And after having changed the standard manifold bolt which was holding down my filter bracket to what I believe is the correct "fuel filter bracket intake stud, nut and washer." I have much more clearance below the filter than before all of this began.
If I had only checked the new filter I bought more carefully and made sure I had the correct one I could have saved myself a lot of aggravation. I assumed I was buying the correct one from a vendor I have used for many years. They normally supply correct parts and I never expected something as simple as a fuel filter could be so wrong. I did get a refund on the filter even though it was somewhat beat up after I got done with it. They don't have a correct one on hand so I'll be going to Corvette Specialties or I believe Paragon has the correct one.Comment
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Re: 63 Fuel Line from Pump to Carburetor
Tom, your "old" filter was no doubt one of the service part GF90 filters that were sold through AC Delco for many years. They were sold with plated finish, had a red silk screen, and of course the notches on the nuts. Many vendors would paint them black, and either apply a decal or silk screen the white letters and numbers. There were also a lot of clever restorers that would fill the grooves in the nuts in an attempt to prevent any deductions during judging. As I stated earlier, the biggest giveaway is the "9". Well, the first company that decided to reproduce them must have copied that poor repro design, instead of the Real graphics. In addition, they also must have approved production of the filters without even picking up that they were too short! When we (Corvette Specialties Manufacturing) licensed ours through the GM Restoration Parts program, and reproduced them, we had an original black filter to copy. The graphics on our filter are actual digital copies of the original. The link I published shows a lot of detail and you can really see the difference in the "9" as well. We went back and forth with the manufacturer and made sure they were correct before we went into production. We sell them to many Corvette parts dealers, and as far as I know, they were the only ones that are regularly offered for sale. Of course, there are probably some of the first repros out there and that is what you have.
Original Black GF 90.jpgComment
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Re: 63 Fuel Line from Pump to Carburetor
The screw holding the filter in the bracket is not correct. That must be a 340 hp set up and the bracket as well as the screw holding the filter in place should have a chrome finish. There should be no nut on that screw it should be sheet metal thread directly to the bracket.Comment
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