Go Back   Ford Mustang Forums > Mustang > Classic Mustang > Classic Tech

Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.

You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.

Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

Classic Forums | Classic Talk | Classic Tech | Classic Pictures | Introductions | Mustang Tech | Mustang Lounge 


Reply   Post New Thread
Unread 08-15-2010   #1 (permalink)
Gregski is offline Made Member

Mustang II Member


Joined: Mar 2010
Posts: 510 Threads: 67
 Gregski's Country Flag
Sacramento   California
Gregski is on a distinguished road
Default Is My Motorcraft 2150 Carburetor Choke Pulldown Diaphragm Missing

Guys I believe I own the Motorcraft 2150 carburetor. It does say Motorcraft on it, but all other tags are missing. A manual I found on the internet states:

Motorcraft 2150 2V Carburetor

All Motorcraft 2150 carburetors are equipped with one of three automatic choke systems.

  • Hot-air choke
  • Hot-air choke with electric assist
  • Electric choke
Ok, so far so good mine looks like one of the Hot-air varieties, but then I see the diagram shows something called the "Choke Pulldown Diaphragm" #2 in the first picture which mine does not have. So I search the internet and find pictures on eBay of a carb similar to mine but with an electric choke and it's also without the diaphragm (green picture), so now I'm confused do some of them not come with the diaphragm, or is mine missing one? (see last pic with the carb upside down showing the two vertical bolt holes where the diaphragm could mount up to.)

Please explain.

(Yes i should ditch it for a four barrel, and I already bought a Holley but this is just a matter of principal now, lol)
Attached Thumbnails
Is My Motorcraft 2150 Carburetor Choke Pulldown Diaphragm Missing-chokeissue1.jpg  Is My Motorcraft 2150 Carburetor Choke Pulldown Diaphragm Missing-chokeissue2.jpg  Is My Motorcraft 2150 Carburetor Choke Pulldown Diaphragm Missing-chokeissue3.jpg  Is My Motorcraft 2150 Carburetor Choke Pulldown Diaphragm Missing-chokeissue4.jpg  
Gregski is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Unread 08-16-2010   #2 (permalink)
rex1965 is offline MACH I Member

Classic Member


Joined: Jan 2010
Posts: 3,198 Threads: 3
 rex1965's Country Flag  View rex1965's 2 photos
Pittsburg   Kansas
rex1965 is on a distinguished road
Default

The early meaning vintage 2100 series has a piston inside the choke housing that gets manifold vacuum thru a passage in the carb on pic 2,3. this carb looks to be in rough shape. These pictures are from different years , pic 1 looks like from the middle to late 70's, pics 2,3 are vintage middle 60's, and pic 4 is about 1970, there has been several changes throughout the years, the carb in pics 2,3 are rated at about 250 cfm, it is only good for a restoration, for performance its poor, they are good carbs, but you have to decide on what you are going to do. If you want performance, you need a 4b and intake, you didn't say what engine you had. Good Luck.
rex1965 is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Unread 08-16-2010   #3 (permalink)
Gregski is offline Made Member

Mustang II Member


Joined: Mar 2010
Posts: 510 Threads: 67
 Gregski's Country Flag
Sacramento   California
Gregski is on a distinguished road
Default Thank you for your feedback much appreicated

Sorry I should have said it's from a 1976 302 with C4 automatic transmission.

I have the 1.21 venturi size which crresponds with 351 CFM according to this chart, but they go up to 424 CFM.

These numbers are for 2V carburetors only (2100/2150). The first numbers are the Venturi Size, the second is the corresponding CFM.

.98 = 190
1.01 = 240
1.02 = 245
1.08 = 287
1.14 = 300
1.21 = 351
1.23 = 356
1.33 = 424

FYI, the carb has been soaked and rebuilt (twice) since, so it looks better now.
Gregski is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Sponsored Links
Advertisement
 
Reply   Post New Thread



Thread Tools



Mustang Photos
Mustang Links    Top Sites    RSS    Link To Us    Add to Favorites    Archive    Terms of Use    Site Rules    Privacy    Contact    Sponsors    Advertise   
AllFordMustangs is not affiliated with or endorsed by Ford Motor Company. ©Copyright 2002-2011 All Auto Enthusiasts Network

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162