86 12 Brutus Posted December 24, 2022 Share Posted December 24, 2022 Hi everybody. It's me, I'm back Sorry i've been gone for so long. Brutus is still running well and the Ranchero is finished. I'll post some pics soon. I'm currently using the 2150 carb on the 351W based L7 police interceptor ( 427 cubic inch) i have the one with 1.21 venturi ( 351 CFM ) I was reading in the documentation that you can increase the flow rate to over 450 cfm. I know they made them back in the 60's with 1.33 venturi, but how would one go about doing this? I'm curious. I'm having issues running to rich and am getting ready to put some smaller jets to see if this will solve my problem. Later on, i do plan on replaceing everything. Any ideas on this? Link to comment Share on other sites More sharing options...
mat in tn Posted December 24, 2022 Share Posted December 24, 2022 427 is drawing a lot through that! you almost need a vacuum leak. haha Link to comment Share on other sites More sharing options...
Gary Lewis Posted December 24, 2022 Share Posted December 24, 2022 While the venturi themselves are removable, I don't think it will help to put larger ones in as the restriction is going to be with the body of the carb itself. So the only way I can think of is to find a larger carb and use it. And, welcome back, Kotter! We've missed you! Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted December 24, 2022 Share Posted December 24, 2022 Welcome George! Merry Christmas to you and Nick. 🎄 Are you aware that 2V and 4V carbs are rated at different pressures? (or.. vacuum levels) The flow difference may be as much as you think. Link to comment Share on other sites More sharing options...
86 12 Brutus Posted December 24, 2022 Author Share Posted December 24, 2022 Welcome George! Merry Christmas to you and Nick. 🎄 Are you aware that 2V and 4V carbs are rated at different pressures? (or.. vacuum levels) The flow difference may be as much as you think. Merry Christmas everybody. I'm just going off what i'm reading in the documentation here on the forum. While you can't change the venturi size, it says you can by polishing it which makes no sense to me. I'm going to end up going with a 4v, but i cant afford it right now and just want to not keep fouling out my plugs. I'm going to try smaller jets to see if i can lean it out, but as it stands, i cant drive it, I even added a vacuum leak and have to still turn the screws way far out. My carb has the 1.21's which is the biggest one, 351 cfm. Now i do know this, the engine is supposed to have a vv on it so i might be thinking the 2150 is just to small Link to comment Share on other sites More sharing options...
Gary Lewis Posted December 24, 2022 Share Posted December 24, 2022 Merry Christmas everybody. I'm just going off what i'm reading in the documentation here on the forum. While you can't change the venturi size, it says you can by polishing it which makes no sense to me. I'm going to end up going with a 4v, but i cant afford it right now and just want to not keep fouling out my plugs. I'm going to try smaller jets to see if i can lean it out, but as it stands, i cant drive it, I even added a vacuum leak and have to still turn the screws way far out. My carb has the 1.21's which is the biggest one, 351 cfm. Now i do know this, the engine is supposed to have a vv on it so i might be thinking the 2150 is just to small Ford used 2150's on the 400, so I doubt it is too small for a 427. In fact, if I remember correctly Bill said his family had a 427 w/a 2150. As for polishing, if you take away metal so the opening is bigger it'll flow more CFM at the same vacuum level, which is how they test. But you have to be careful as some of that metal is there to create a vacuum on the fuel, and if you decrease that vacuum the carb won't work correctly. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted December 24, 2022 Share Posted December 24, 2022 Merry Christmas everybody. I'm just going off what i'm reading in the documentation here on the forum. While you can't change the venturi size, it says you can by polishing it which makes no sense to me. I'm going to end up going with a 4v, but i cant afford it right now and just want to not keep fouling out my plugs. I'm going to try smaller jets to see if i can lean it out, but as it stands, i cant drive it, I even added a vacuum leak and have to still turn the screws way far out. My carb has the 1.21's which is the biggest one, 351 cfm. Now i do know this, the engine is supposed to have a vv on it so i might be thinking the 2150 is just to small I have a Holley 4160- 600 (80457-S) and an Edelbrock 650 AVS on the shelf. George, please let me know if either of these would help you with the Ranchero. Perhaps I can get them to fit in a flat rate box. Link to comment Share on other sites More sharing options...
86 12 Brutus Posted December 25, 2022 Author Share Posted December 25, 2022 I have a Holley 4160- 600 (80457-S) and an Edelbrock 650 AVS on the shelf. George, please let me know if either of these would help you with the Ranchero. Perhaps I can get them to fit in a flat rate box. Yes Jim, Yesss. How much do you want for them? Link to comment Share on other sites More sharing options...
86 12 Brutus Posted December 25, 2022 Author Share Posted December 25, 2022 Yes Jim, Yesss. How much do you want for them? Jim, electric choke? Link to comment Share on other sites More sharing options...
85lebaront2 Posted December 25, 2022 Share Posted December 25, 2022 Ford used 2150's on the 400, so I doubt it is too small for a 427. In fact, if I remember correctly Bill said his family had a 427 w/a 2150. As for polishing, if you take away metal so the opening is bigger it'll flow more CFM at the same vacuum level, which is how they test. But you have to be careful as some of that metal is there to create a vacuum on the fuel, and if you decrease that vacuum the carb won't work correctly. 1971 429 2V, 1.33 venturii. I had one on my 1971 Colony Park. Once I found that the only difference in the engine from the 4V was the intake and carb, I went to my local junkyard and got a 4V intake for a 429/460. Link to comment Share on other sites More sharing options...
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