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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

carb question

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Old Jun 8, 2007 | 11:08 AM
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carb question

on my 86 4x4 5.8 HO when I picked it up yesterday the previous owner stated he swapped out the stock holley for a 2 barrel, performance sure took a hit but my question is, starving the engine like this will it burn the valves or other damage?

I called him and he says he has the orig carb, so I asked him to bring it over..
 
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Old Jun 8, 2007 | 12:04 PM
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Some 2-bbls can easily keep up with a 5.8, so the answer is "it depends". More than likely nothing was hurt but the performance.
 
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Old Jun 8, 2007 | 02:38 PM
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My 84 F350 drw has a 351W with a holley 2BBL and she seems to have plenty of power.
 
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Old Jun 8, 2007 | 03:39 PM
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here is my take on this situation. If a vehicle comes out with a 4 barrel the engine is engineered to have the extra amount of fuel going into it. if it has a 2 barrel the same applies. If someone put a 2 barrel on a four barrel engine most likely it is for economy reasons or a 4 barrel carb in need of maybe a rebuild. If you want your performance back just put on the 4 barrel. I don't see any damage being caused by the 2 barrel.
 
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Old Jun 8, 2007 | 03:49 PM
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most 4 barrels only use 2 barrels for economy until u step on it then vacuum opens the other two up
 
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Old Jun 8, 2007 | 06:10 PM
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thanks for the input, guess I'll leave the 2 bbl on it and install a new choke..
 
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Old Jun 8, 2007 | 08:11 PM
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Talking

well I talked to the old owner of my truck and it seems his boys threw my carb in the trash last week WTH..

anyway since these holleys seem problematic I've decided to go with a Carter afb 500/600/625/650 cfm with tranny linkage..

would this be a good carb for a 5.8L HO with 82k orig??

or please recommend something for me,

thanks in advance
 
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Old Jun 8, 2007 | 08:39 PM
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Yes, that would be a good choice. I am assuming you have some sort of carb adapter on it now for the 2bbl? If not, you will have to get a 4bbl manifold for it.
 
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Old Jun 8, 2007 | 08:43 PM
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yes it still has the orig manifold with adapter plate. great, thanks for the reply..
 
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Old Jun 8, 2007 | 10:26 PM
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Does the 2-bbl adapter set on top of a spacer or egr plate? If not, you'll need one. I wouldn't recommend bolting a carburetor directly onto a factory manifold.
 
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Old Jun 8, 2007 | 10:53 PM
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yes I have the carb plate
 
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