I6 carb problems
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From: where ever the Corps says...
I6 carb problems
i just bought a '81 F100 w/ I6 300 and have noticed one unforgivable problem... the carb is only 1 barrel! is there some way to tune-modify-replace it cheaply that will help out on the performance end of it without replacing the intake manifold, because my current location doesn't lend to that task very easily. thanks on any input...
Semper Fi Devil Dogs.
Semper Fi Devil Dogs.
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From: S. Mississippi
I6 carb problems
The 1bbls that come on the 300s aren't known for performance, but are alright carbs all around.
For swapping on a 2bbl minimum i'd go towards cliffordperformance.com, although i don't know about the speed of delivery or quality of the part, they do offer a 1bbl to 2bbl adapter on their site, $58 dollars if i belive right.
If you go to choose a carb, the Motorcraft/Autolite 2bbl 2100-2150 series will work on this application, but may require some rejetting and tinkering to get just right.
Then again there are 350 cfm 2bbls out there also, summit or jegs may have one of those.
Hope this helps!
For swapping on a 2bbl minimum i'd go towards cliffordperformance.com, although i don't know about the speed of delivery or quality of the part, they do offer a 1bbl to 2bbl adapter on their site, $58 dollars if i belive right.
If you go to choose a carb, the Motorcraft/Autolite 2bbl 2100-2150 series will work on this application, but may require some rejetting and tinkering to get just right.
Then again there are 350 cfm 2bbls out there also, summit or jegs may have one of those.
Hope this helps!
Senior User
Joined: Feb 2003
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I6 carb problems
The 1bbl. doesn't lend itself to performance. The adapter spoken about earlier work's fine also if you use a 2bbl. from a 289. It won't require a jet change, but the real ticket is to get a 4bbl intake and carb from Clifford research it will really open up that six cylinder.
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Joined: Oct 2002
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From: The Big, Oregon
I6 carb problems
I wouldn't buy anything from Clifford. Don't get me wrong, they have great products, but their customer service is horrible, and the prices are high. If you find an intake either in the classifieds here, or on E-bay, great. Just bear in mind that most of their stuff only works together. That means their intake, and their headers. I have an Offey intake on my truck, and EFI dual exhaust manifolds, and it runs great. This same engine used to have headers on it (can't remember the brand right off), and had no low end. Now it has off-idle torque and pulls to 5,500. Ultimately, the choice is up to you, but this is really the route I would recommend.
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Joined: Mar 2003
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From: where ever the Corps says...
I6 carb problems
i have heard of the clifford swaps but was looking for more along of possible honing out the carb and modifying the injectors, or at least it worked on my 1951 Farmall Super C (with almost a bigger engine, 
) if any one knows of the old school tricks that don't involve parts swapping it would be appreciated... thanks
Semper Fi
1st FAST
Norfolk, Va
) if any one knows of the old school tricks that don't involve parts swapping it would be appreciated... thanksSemper Fi
1st FAST
Norfolk, Va
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