The Ford Barn

majohnson00 · 02-29-2016, 06:13 PM

Somebody please explain how the GAV works and why. 31 Model A Tudor, Zenith carburetor. Thanks, Marv
[email protected]

Mitch//pa · 02-29-2016, 06:30 PM

Read through this

http://www.motormayhem.net/wp-upload...ion-Manual.pdf

SteveB31 · 02-29-2016, 07:20 PM

or try this

http://modela.org/gav_seat.html.....

Mitch//pa · 02-29-2016, 07:30 PM

Steve I reference your carb site often
Thankyou

majohnson00 · 02-29-2016, 08:28 PM

Steve, Exactly what I was looking for. I have the big Model A Service manual, but it really does not explain it (to me, anyway), like the link you sent. Thanks, Marv

TinCup · 03-01-2016, 12:53 AM

Sponsored Links (Register now to hide all advertisements)

Or try http://modelabasics.com.

Mike V. Florida · 03-01-2016, 01:11 AM

If you still have a question let us know.

BILL WILLIAMSON · 03-01-2016, 08:59 AM

On setting the GAV, Chiefs' system was: "With a warm engine, run at a CONSTANT speed of 20 to 25 MPH in second gear & adjust your GAV for the BEST, SMOOTHEST RUNNING"
And IF your GAV setting affects your idle, YOUR IDLE SPEED IS TOO FAST!
Bill W.

mshmodela · 03-01-2016, 09:25 AM

Check out page 7: Nice drawing that Tom Endy did:

http://modelabasics.com/Carb/ZenithPassageways.pdf

Benson · 03-01-2016, 10:10 AM

Another helpful thing about the GAV:

One turn is good to begin with for cold starts.

If you start the engine and it dies in 1 or 2 seconds.

Open the GAV some more (counter clockwise) Like if temperature is below freezing.

Close GAV as it warms up.

Normal position after warm up is a 1/4 turn off the seat.

Be gentle when closing GAV it is a brass needle and early ones have a brass seat also ... it is easy to damage these parts.

02-29-2016, 06:13 PM	#1
majohnson00 Senior Member Join Date: May 2010 Location: Fenton, Mich. Posts: 147	Gav Somebody please explain how the GAV works and why. 31 Model A Tudor, Zenith carburetor. Thanks, Marv [email protected] Last edited by majohnson00; 02-29-2016 at 06:15 PM. Reason: add e-mail

02-29-2016, 06:30 PM	#2
Mitch//pa BANNED Join Date: May 2010 Location: Bucks County, PA Posts: 11,454	Re: Gav Read through this http://www.motormayhem.net/wp-upload...ion-Manual.pdf

02-29-2016, 07:20 PM	#3
SteveB31 Senior Member Join Date: May 2010 Location: Englewood, Colorado Posts: 1,377	Re: Gav or try this http://modela.org/gav_seat.html.....

02-29-2016, 07:30 PM	#4
Mitch//pa BANNED Join Date: May 2010 Location: Bucks County, PA Posts: 11,454	Re: Gav Steve I reference your carb site often Thankyou

02-29-2016, 08:28 PM	#5
majohnson00 Senior Member Join Date: May 2010 Location: Fenton, Mich. Posts: 147	Re: Gav Steve, Exactly what I was looking for. I have the big Model A Service manual, but it really does not explain it (to me, anyway), like the link you sent. Thanks, Marv

03-01-2016, 12:53 AM	#6
TinCup Senior Member Join Date: May 2010 Location: OKC / Tonkawa, Ok. Posts: 1,977	Re: Gav Sponsored Links (Register now to hide all advertisements) Or try http://modelabasics.com. __________________ Oklahoma City Model A Restorers Group.

03-01-2016, 01:11 AM	#7
Mike V. Florida Senior Member Join Date: May 2010 Location: Florida between Sarasota and TampaSouth Florida Posts: 14,054	Re: Gav If you still have a question let us know. __________________ What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II

03-01-2016, 08:59 AM	#8
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Gav On setting the GAV, Chiefs' system was: "With a warm engine, run at a CONSTANT speed of 20 to 25 MPH in second gear & adjust your GAV for the BEST, SMOOTHEST RUNNING" And IF your GAV setting affects your idle, YOUR IDLE SPEED IS TOO FAST! Bill W. __________________ "THE ASSISTANT GURU OF STUFF"

03-01-2016, 09:25 AM	#9
mshmodela Senior Member Join Date: Mar 2014 Location: Cleveland, Ohio Posts: 2,765	Re: Gav Check out page 7: Nice drawing that Tom Endy did: http://modelabasics.com/Carb/ZenithPassageways.pdf __________________ -Mike Late 31' Ford Model A Tudor, Miss Daisy I don't work on cars --I'm learning about my Model A. Cleveland, Ohio

03-01-2016, 10:10 AM	#10
Benson Senior Member Join Date: May 2010 Location: Central Highlands, Cen~Col Posts: 2,896	Re: Gav Another helpful thing about the GAV: One turn is good to begin with for cold starts. If you start the engine and it dies in 1 or 2 seconds. Open the GAV some more (counter clockwise) Like if temperature is below freezing. Close GAV as it warms up. Normal position after warm up is a 1/4 turn off the seat. Be gentle when closing GAV it is a brass needle and early ones have a brass seat also ... it is easy to damage these parts.