Variable Venturi carbs?

Joe Toller · 02-06-2014, 04:06 PM

Has anyone raced with a VV carb? According to my specs I have to use a 2700 Motorcraft VV carb on my 77 302. Or, because it reads off a oxygen sensor and, being a feedback style carb is of sorts a computer-controlled unit, can I just use a traditional 2150?

Mike Taylor 3601 · 02-07-2014, 09:40 AM

I remember VV carb being vac controlled,I remember changing plenty of the diaphrams that controlled the variable venturi,sliding back and forth in top of carb.don't remember any electronic wiring going to those carbs,only wires I remember is choke and idle solenoid
Mike Taylor 3601

Joe Toller · 02-07-2014, 04:28 PM

I might have been thining a later VV...Ill raid one from the junkyard this weekend and take it apart and see whats up...

Tom keedle · 02-07-2014, 07:52 PM

some were 'puter controlled and some were not
all were a pos as far as I'm concerned...
there USED to be a holley conversion for them years ago, did one on a comp controlled Lincoln once
never raced one though

Mike Taylor 3601 · 02-08-2014, 10:50 AM

They blew diaphrams like crazy then slides in top would.nt move ran like choke was on.
77 I would guess is non electronic version
Mike Taylor 3601

Dave Noll · 02-08-2014, 05:37 PM

One of the shops I used to work @, the owner told me that when they were working right they were a good gas mileage carb.

Mark Yacavone · 02-08-2014, 09:05 PM

Joe , Get an early one and open the top flap and then tell me why you wouldn't want to use it.
BTW, ANY type of linkage for single or multiple carbs is acceptable with NHRA.
What I'm saying is I wouldn't be dependent on a leak prone diaphragm if that's the case.

Joe Toller · 02-08-2014, 09:10 PM

Gotcha. I will get to the yard as soon as I see at least 20 degrees out lol!

02-06-2014, 04:06 PM	#1
Joe Toller Senior Member Join Date: Jan 2009 Location: Lewistown, Montana Posts: 550 Likes: 78 Liked 4 Times in 4 Posts	Variable Venturi carbs? Has anyone raced with a VV carb? According to my specs I have to use a 2700 Motorcraft VV carb on my 77 302. Or, because it reads off a oxygen sensor and, being a feedback style carb is of sorts a computer-controlled unit, can I just use a traditional 2150? __________________ Joe Toller Lewistown, MT

02-07-2014, 09:40 AM	#2
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,371 Likes: 352 Liked 304 Times in 102 Posts	Re: Variable Venturi carbs? I remember VV carb being vac controlled,I remember changing plenty of the diaphrams that controlled the variable venturi,sliding back and forth in top of carb.don't remember any electronic wiring going to those carbs,only wires I remember is choke and idle solenoid Mike Taylor 3601

02-07-2014, 04:28 PM	#3
Joe Toller Senior Member Join Date: Jan 2009 Location: Lewistown, Montana Posts: 550 Likes: 78 Liked 4 Times in 4 Posts	Re: Variable Venturi carbs? I might have been thining a later VV...Ill raid one from the junkyard this weekend and take it apart and see whats up... __________________ Joe Toller Lewistown, MT

02-07-2014, 07:52 PM	#4
Tom keedle Senior Member Join Date: Dec 2008 Location: Berthoud, Coloraduh Posts: 695 Likes: 13 Liked 8 Times in 7 Posts	Re: Variable Venturi carbs? some were 'puter controlled and some were not all were a pos as far as I'm concerned... there USED to be a holley conversion for them years ago, did one on a comp controlled Lincoln once never raced one though __________________ without losers,winning means nothing.

02-08-2014, 10:50 AM	#5
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,371 Likes: 352 Liked 304 Times in 102 Posts	Re: Variable Venturi carbs? They blew diaphrams like crazy then slides in top would.nt move ran like choke was on. 77 I would guess is non electronic version Mike Taylor 3601

02-08-2014, 05:37 PM	#6
Dave Noll Senior Member Join Date: Nov 2007 Location: Div. 6, Eastern, WA Posts: 709 Likes: 2,671 Liked 238 Times in 111 Posts	Re: Variable Venturi carbs? One of the shops I used to work @, the owner told me that when they were working right they were a good gas mileage carb. __________________ Dave Noll, EF/S ,?/SA 6526

02-08-2014, 09:05 PM	#7
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,815 Likes: 2,903 Liked 5,120 Times in 1,951 Posts	Re: Variable Venturi carbs? Joe , Get an early one and open the top flap and then tell me why you wouldn't want to use it. BTW, ANY type of linkage for single or multiple carbs is acceptable with NHRA. What I'm saying is I wouldn't be dependent on a leak prone diaphragm if that's the case. __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

02-08-2014, 09:10 PM	#8
Joe Toller Senior Member Join Date: Jan 2009 Location: Lewistown, Montana Posts: 550 Likes: 78 Liked 4 Times in 4 Posts	Re: Variable Venturi carbs? Gotcha. I will get to the yard as soon as I see at least 20 degrees out lol! __________________ Joe Toller Lewistown, MT