85lebaront2 Posted September 5, 2019 Share Posted September 5, 2019 Mine hasn't had gas added to it in a month, and probably won't for the next six months. When I switched the bed on mine I was going to use the newer (1987 up) filler necks to go with the 1990 tanks. Every gas engined dually at Pete's had the filler hoses cut so the yard crew could siphon gas out to run the yard trucks and forklifts. I ended up getting the set from a 1996 Diesel, which is fine with me as they vent better. End result, Darth has screw in caps with little lanyards to keep them from getting lost. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 5, 2019 Share Posted September 5, 2019 Just to followup, they fit the filler necks for my 86 460 fine although the whole 2 step twist process will get old really fast. Can't you just bend the first set of ears down, so it's only one step? As for having to fill up. I've recently beat my mileage down to under 8. Barn door aerodynamics and 100+ mph will do that, I guess. Maybe I should put the 750 4160 back on. This 650 just doesn't pull hard enough on top, and the 4.10's with smaller tires are limiting too. Link to comment Share on other sites More sharing options...
Gary Lewis Posted September 5, 2019 Share Posted September 5, 2019 Can't you just bend the first set of ears down, so it's only one step? As for having to fill up. I've recently beat my mileage down to under 8. Barn door aerodynamics and 100+ mph will do that, I guess. Maybe I should put the 750 4160 back on. This 650 just doesn't pull hard enough on top, and the 4.10's with smaller tires are limiting too. I thought a 4160C was a 650? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 5, 2019 Share Posted September 5, 2019 I thought a 4160C was a 650? The stock 4180 is considered 650. 4160's are vacuum secondary four barrels in general. Just as 4150's are mechanical secondary double pumpers. Link to comment Share on other sites More sharing options...
Gary Lewis Posted September 5, 2019 Share Posted September 5, 2019 The stock 4180 is considered 650. 4160's are vacuum secondary four barrels in general. Just as 4150's are mechanical secondary double pumpers. My excuse is that I just got up and have only had two sips of coffee. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 5, 2019 Share Posted September 5, 2019 My excuse is that I just got up and have only had two sips of coffee. Been up since 2 Trying not to go back inside and make a second pot. Link to comment Share on other sites More sharing options...
kramttocs Posted September 5, 2019 Share Posted September 5, 2019 Can't you just bend the first set of ears down, so it's only one step? That's a good idea and seems like it would be possible. The cap isn't that bad so I'll give it some time once I get the truck up and going but if it comes down to it, removing the tabs may happen. Link to comment Share on other sites More sharing options...
85lebaront2 Posted September 5, 2019 Share Posted September 5, 2019 The stock 4180 is considered 650. 4160's are vacuum secondary four barrels in general. Just as 4150's are mechanical secondary double pumpers. Jim, the 4150 Holley carburetor model has two metering blocks and was the original design in 1957 replacing the 4000. The 4160 has one metering block and a metering body for the secondary. The Double Pumper high performance carburetors are based on the 4150 architecture, but with what are essentially two primary bowls with the inlets on the opposite sides so fuel can be fed to them from the right side of the engine. The 4180 is an emission compliant design for Ford engines and is based on the 4160 architecture. Both the 4180 and the Chrysler specific 4160s can be problematic due to the design compromises needed for emission compliance. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 5, 2019 Share Posted September 5, 2019 Jim, the 4150 Holley carburetor model has two metering blocks and was the original design in 1957 replacing the 4000. The 4160 has one metering block and a metering body for the secondary. The Double Pumper high performance carburetors are based on the 4150 architecture, but with what are essentially two primary bowls with the inlets on the opposite sides so fuel can be fed to them from the right side of the engine. The 4180 is an emission compliant design for Ford engines and is based on the 4160 architecture. Both the 4180 and the Chrysler specific 4160s can be problematic due to the design compromises needed for emission compliance. Thanks for the education Bill. So all double pumpers are 4150's, but not all 4150's are double pumpers. Link to comment Share on other sites More sharing options...
85lebaront2 Posted September 5, 2019 Share Posted September 5, 2019 Thanks for the education Bill. So all double pumpers are 4150's, but not all 4150's are double pumpers. Pretty much correct, there is the oddball 4165 that is designed on a Quadrajet bolt pattern and can be a double pumper or vacuum secondary. Then you have the 3160 3 barrel and the 4500 Dominator. The metering blocks allow easy jetting changes on the main circuit, but the original design did not have any provision to change the idle and transition jetting, The metering body allows the main and low speed circuits to be changed (The Holley catalog I had at Preston had probably 60 or 70 different metering body PNs so you could tailor the jetting to what was needed. Two of Holley's most popular performance carbs started out as OEM applications, The R-1850 600 CFM was an OEM application for a 1958 Lincoln 430, the R-3310 was an OEM application for a 1965 Chevrolet 396 - 425 hp engine. Both have been updated and "improved". Link to comment Share on other sites More sharing options...
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