colorado51
09-13-2004, 10:29 AM
Ok you guys and gals, the wife and I are leaving Wednesday for a 12-day vacation in Maui. So, I thought I would leave you with a short and sweet tech post.
Don’t know who all noticed or not, but last week there was a pretty good post on Holley carbs ( http://www.jalopyjournal.com/ubbthreads/showflat.php?Cat=&Number=541293&page=&view=&sb=5&o =&fpart=all&vc=1 ), so I thought I would expand on that a little.
Holley’s are really pretty simple, and if you run one, you will probably end up having to change the jets / power valve a few times to get it just right. Here is a simple way to do that.
Here is the subject, my 51 Chevy with a Holley 3310. You will notice that I have cut a section out of the cheap chrome dual feed fuel line (left side of carb) and replaced it with a piece of rubber fuel hose.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001382.jpg
Ok the first thing I do is barley loosen all the float bowl screws (so you don’t warp the float bowl or metering block). Then with a cup under one of the lowers screws, I remove that screw and drain the fuel out of the bowl in to the cup.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001383.jpg
Remove the rest of the screws. Remember how I said I cut the chrome dual feed inlet line and added a piece a rubber fuel hose? That is so I can swing the float bowl out of the way without removing any on the fuel lines. So there you have it, jet changes without removing the carb in less than 15 minutes without getting fuel all over the place or loosening any fuel lines.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001384.jpg
Also, in my case, Im running this on a pretty much stock 454. These 3310 (750cfm) Holleys have a tendency to run rich at idle no matter how well you have it tuned. A good remedy for this is to drill a .089 (#43 drill) hole in each primary butterfly.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001385.jpg
Don’t know who all noticed or not, but last week there was a pretty good post on Holley carbs ( http://www.jalopyjournal.com/ubbthreads/showflat.php?Cat=&Number=541293&page=&view=&sb=5&o =&fpart=all&vc=1 ), so I thought I would expand on that a little.
Holley’s are really pretty simple, and if you run one, you will probably end up having to change the jets / power valve a few times to get it just right. Here is a simple way to do that.
Here is the subject, my 51 Chevy with a Holley 3310. You will notice that I have cut a section out of the cheap chrome dual feed fuel line (left side of carb) and replaced it with a piece of rubber fuel hose.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001382.jpg
Ok the first thing I do is barley loosen all the float bowl screws (so you don’t warp the float bowl or metering block). Then with a cup under one of the lowers screws, I remove that screw and drain the fuel out of the bowl in to the cup.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001383.jpg
Remove the rest of the screws. Remember how I said I cut the chrome dual feed inlet line and added a piece a rubber fuel hose? That is so I can swing the float bowl out of the way without removing any on the fuel lines. So there you have it, jet changes without removing the carb in less than 15 minutes without getting fuel all over the place or loosening any fuel lines.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001384.jpg
Also, in my case, Im running this on a pretty much stock 454. These 3310 (750cfm) Holleys have a tendency to run rich at idle no matter how well you have it tuned. A good remedy for this is to drill a .089 (#43 drill) hole in each primary butterfly.
http://img.photobucket.com/albums/v159/rockahula/51%20Chevy/P0001385.jpg