2 performance questions
Logistics Pro
Joined: Jan 2002
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From: GANS
A brand-new 750cfm with manual choke is $239.95, and the with an electric choke its $275.95
You can buy a reman (I put a reman 600cfm on my 351w, and it works great) for $189.95 or $219.75 (respectively). I went with a manual choke on my f-250. Simpler, and you know it is off when it is off.
Your carb won't be shot with 80k, but since it is an '86, that means it has been sitting a lot off and on since '86. It probably just needs rebuilt with new gaskets and cleaned.
You can buy a reman (I put a reman 600cfm on my 351w, and it works great) for $189.95 or $219.75 (respectively). I went with a manual choke on my f-250. Simpler, and you know it is off when it is off.
Your carb won't be shot with 80k, but since it is an '86, that means it has been sitting a lot off and on since '86. It probably just needs rebuilt with new gaskets and cleaned.
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Senior User
Joined: Sep 2003
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I might just rebuild what I have, I'm into fixing things to see how they run anyways, great learning experience which this truck has been doing. Now I need to find a manual or online page to tell me how hard it is.
Posting Guru
Joined: Sep 2003
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From: Right Next to U
Its not really hard IF you are paying attention to what you are taking apart and making a mental note of how its going BACK into the carb, rebuilding one is really fun, just pay attention with the right rebuilt kit, and go from there, although it used to be that some manuf. of carb rebuild kits would put several different models of carb gaskets that won't pertain to your carb, just figure out which ones by taking each one part and searching for that part in the package....and you'll have a good rebuilt carb that works great. Its cheaper by buying the rebuilt kits by the way....Good Luck!
Senior User
Joined: Nov 2003
Posts: 219
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From: chino valley az
wooa stop real quick here. first the edelbrock is nice, but a 750? come on the most a 460 will ever flow at 5500 rpms with a stock motor and duals with headers is maybe 550. the stock carb was a 600. the factory holley 4180 really is not worth rebuilding, any holley guy will tell you the booster design was bad. if you are building for any help with horsepower or torque, that is a really bad carb to work with. you will find the holley 0-80457 or r-80457 (same carb) is the best bet for you. it is jetted perfect for the 460 at sea level to 3500', a little rich at alltitude. it has the ford kickdown linkage on it, at an electric choke. this is a direct bolt down carb for this motor. the edelbrock will require the electric choke kit as well as the ford linkage kit to make it fit and work. plus the jetting is for a 400 chevy hp, and is way to lean for a 460. the holley can be purchased new for less than 250., an fact checker and autozone sell this carb for 239.99. stop and look at how often you take that 460 to 4000 rpm and you will realize that even the 600 cfm is to big. the headman header for your truck can be bought for 139.99 from jegs as well as from paw. it is a nice fit with no modifications to the engine compartment. a rebuild kit for a 4180 carb will run you about 50-80 dollars depending on where you buy it. and no the standard holley carb kit wont fit. Kurt
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Senior User
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So assuming I get a "Holley 0-80457 or r-80457" and since I'm new at working with carbs, are these a drop in and go unit or will I have to do some adjustments for the motor? 239.00 is too rich for my blood right now, I could spend that on other parts of truck as it needs some new parts other than the carb, although, it will go on my list now. Going back to one of my original questions, is this a good exuast system or not? It has 2.XX pipes running from each side right to the muffer THEN a 3" out the back of the muffler to the back of the truck (no cat anywhere). I can see exhaust is gonna need some work in the spring, wonder if stock is decent (I prefer to keep it stock config if possible) or is it better to change it to something else?
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From: chino valley az
the carb is fine if not perfect if you are below 3000-3500' feet. if you are above it like me, you need to drop it 2 jet sizes. the head pipes were great, 2.5 inch diameter. the tail pipe is a bit of a concern. the cheapest way to fix it is to cut, the muffler inlet off, and run two turbo's with turn downs on the end. if money is available at the time, you can have a muffler shop run new tailpipes over the axle and out the rear. but for cost just cut the old one off, and turn the new muffler downs. price about 20 a muffler, 5 in clamps, and 10 in turn downs. 35 to to do it yourself or about 75 to get it done.. Kurt
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Joined: Jan 2003
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From: Callahan US
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From: chino valley az
the pipe drops in size by 35%. this will cause a large amount of back pressure and heat in the head pipe. this heat will build up and cause a few things in time. first is it will burn exhaust vavles. seen it to many times in the lima motors. it has always been eliminated with dual exhaust. the second in in heats the manifold, this is why the 460 was so famous for cracked and warped manifolds. you would be suprised by the heat a little back pressure will make. you will be suprised the torque you will be freeing up by clipping the single tail pipe set up. it was a real bad ides, but it made the epa happier.
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Joined: Sep 2003
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From: In The Blue Ridge Mountains
I have a Holley problem also. What guide can I use to decide what to replace it with. I don't care Edle..hol or Holl...brock but I want something reliable, cheap and easy to install. I want the electric choke though. Also, how hard is it to get started after you swap a carb? Is it a two person job? Can I go with Edlebrock with the stock manifold?
Senior User
Joined: Nov 2003
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From: chino valley az
the holley is a direct bolt on. it even has the correct linkage for the auto trans kick down if you have the auto trans. it already has the electric choke so no problem there. it should take you about 3-4 hours to install the carb, and requires no special tools. i have installed alot of these with no problems. customers are really happy with the part throttle drivability as well as the easy starting the 80457 has. its a carb you wont go wrong with for both power and fuel economy.. Kurt
Senior User
Joined: Nov 2003
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From: chino valley az
i too agree the 4100 was one of the best carbs, the next would be the holley 4360 series. both of which are dead ringers. parts for the 4100 are getting harder to find. the last two i "restored" for customers, i had to have custom throttle body bushings made for them. the aftermarket has dropped the line for parts. the price of a rebuild kit has exceeded 50 for a "good" kit, and great kits are in excess of 75. the 4360 were the lower cfm "economaster carbs. the new holley 4100 series crbs are nice and have taken alot of ideas from the two. i have yet to work on one, or sell one yet. people really like the 80457 and old 1850's. the price of the "avenger" carbs is well over 300... the one thing i can't stress enough, is that not all the holleys were bad. the 4180 series that they put on the 460 and 429lima motors was a bad idea. they are prone to short throttle plate life, leaks. the quality on this carb was low and as holley has stated in the past, this carb is not a rebuildable carb. that is why they do not offer a kit for it. most of the "reman" carbs i have seen for the 4180's were actually a new 4160 emission carb in a reman box. ford and holley need to stay out of bed together. ford can build a great carb, holley builds a great carb, but the two of them cant build "poop"(place correct word there)..... Kurt
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