Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
Clarks Corvair
“CORSA"



Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Corvair Center Forum :  Corvair Center Phorum The fastest message board... ever.
Corvair Center 
Pages: 12Next
Current Page: 1 of 2
Left carb is WOT
Posted by: mattlockwood ()
Date: September 01, 2019 03:33PM

I have a 2 carb 110. My throttle shaft is a 4 carb.

With the throttle “closed”, it appears that the drivers side throttle valve (butterfly valve at base of carb) is wide open. I have to choke out the carb by placing a cover over it, or it goes full blast.

Is this because of the 4 carb throttle shaft, or is my carb somehow mis-rigged? I rebuilt it per Bob Helts book.

Is a four carb shaft different than 2 carb shaft?

I prob need to provide more infowinking smiley ask away.

Thanks!

Matt

Options: ReplyQuote
Re: Left carb is WOT
Posted by: MattNall ()
Date: September 01, 2019 03:34PM

Mat here.... Matt Needs Pics!! Your downlinks are bent or ????

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Left carb is WOT
Posted by: Frank DuVal ()
Date: September 01, 2019 09:37PM

The very end of the throttle cross shaft on the left has the bellcrank that connects to the link (with the swivel) that goes to the left carburetor.

The bellcrank near the right side of the left carburetor should not be used.

Did you swap left and right carburetors? Yes, I know, they are the same, BUT the wear pattern on the bellcranks is different! You can match the bellcrank witness marks (where wear has taken place) to make sure the correct holes in the bellcranks are used to attach the linkages, but only if you keep them right and left as taken apart. i.e. I use the witness marks to know if I am holding a right or left carburetor base!

Linkages should connect as shown in the shop manual. And, any Corvair shop manual, since the two carburetor linkages change very little from 196 to 1969. IIRC, only the 61 to 64 AC cars had the weird different right carburetor link to the throttle shaft bellcrank.

Frank DuVal

Fredericksburg, VA

Options: ReplyQuote
Re: Left carb is WOT
Posted by: isucorvair ()
Date: September 03, 2019 01:39PM

IF you need a cross-shaft for a 2 carb engine, I have spares..

PM me.

Eric P.
DeWitt, IA

Options: ReplyQuote
Re: Left carb is WOT
Posted by: mattlockwood ()
Date: September 03, 2019 04:01PM

I apologize for not being able to upload pictures. If anyone can recommend a photo compression app for iPhones, please PM me.

I procured a 2 carb cross-shaft, thx Chris and thx Eric for the offer.

With 2 carb cross shaft installed, throttle return spring attached, right carb (passenger side) throttle valve is closed or nearly so (idle?).

Left side- is the linkage between the throttle lever and the crosshaft left bell crank longer than the right side linkage? There are two holes on the throttle lever, one on the left side of the throttle lever , one one the right side of the throttle lever just below the fast idle tang. My linkage is not long enough to attach to the left hole AND the bellcrank AND still keep the throttle closed, or at idle. It’s not supposed to be connected to the hole below the tang, correct?

Does that make sense? A lot of info, I tried to make it clear.

Anyone got a good picture of the left side linkage?

Thanks,

Matt

Options: ReplyQuote
Re: Left carb is WOT
Posted by: Lane66m ()
Date: September 03, 2019 04:04PM

Adjustable link on right side, solid link on left side.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


Options: ReplyQuote
Re: Left carb is WOT
Posted by: joelsplace ()
Date: September 03, 2019 04:19PM

[resizeimage.net]
Online not an app so it should work on anything capable of uploading a file.

Joel
Northlake, TX
5 Ultravans, Lost count at 100 Corvairs...

Options: ReplyQuote
Re: Left carb is WOT
Posted by: mattlockwood ()
Date: September 03, 2019 04:31PM

[resizeimage.net]


Well, here’s a link to it. See how the linkage is not nearly long enough?

(Thx Joel)



Edited 2 time(s). Last edit at 09/03/2019 04:37PM by mattlockwood.

Options: ReplyQuote
Re: Left carb is WOT
Posted by: Lane66m ()
Date: September 03, 2019 04:44PM

Hook up left link first, then adjust right link to hook up.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


Attachments:
Options: ReplyQuote
Re: Left carb is WOT
Posted by: mattlockwood ()
Date: September 03, 2019 04:56PM

Lane66m Wrote:
-------------------------------------------------------
> Hook up left link first, then adjust right link to hook up.

Thanks Al(and Frank too)

So what I have is 2 left side linkages and no correct right side linkages. Both my linkages are the same length. Found this on eBay- should solve my problem


[www.ebay.com]



Edited 1 time(s). Last edit at 09/03/2019 04:57PM by mattlockwood.

Options: ReplyQuote
Re: Left carb is WOT
Posted by: MattNall ()
Date: September 03, 2019 05:14PM

I run those. Work great... "Steve in Murrietta" here makes them up.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Left carb is WOT
Posted by: Lane66m ()
Date: September 03, 2019 05:22PM

When you get it all worked out and running right with 4 carbs, get Roger Parents carb linkage. Takes care of all points that can wear and create slop. Good system. I have the 2 carb version on my More Door and a set for my next engine waiting build.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


Options: ReplyQuote
Re: Left carb is WOT
Posted by: Frank DuVal ()
Date: September 03, 2019 10:04PM

Quote
Al
Adjustable link on right side, solid link on left side.

No! Driver's side is Left side, and has adjustable link.

Right side is passenger side and has solid wire link.

Quote
Al
Hook up left link first, then adjust right link to hook up.

Again, No! Hook up right side link according to shop manual procedure, then adjust left link swivel to fit.

Please see page 6-5 of the 1965 shop manual and see the picture, the right carburetor link is a piece of bent wire, no swivel. Also on this page starts the carburetor synchronization procedure.

Now if only I could post a .pdf here you could already see the picture. winking smiley

Frank DuVal

Fredericksburg, VA

Options: ReplyQuote
Re: Left carb is WOT
Posted by: MattNall ()
Date: September 03, 2019 10:28PM

"Passenger side" and "Driver's side" makes it extremely clear! GGG

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Left carb is WOT
Posted by: Lane66m ()
Date: September 04, 2019 02:28AM

Guess whoever set up my More Door had it wrong. That is the way I took it off. Now adjustable links on both sides with Roger's system. I will swap them when I have the 80 uhp ready to run someday.

But, does it really matter which side solid link is on?

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


Options: ReplyQuote
Re: Left carb is WOT
Posted by: MattNall ()
Date: September 04, 2019 07:02AM

Lane66m Wrote:
-------------------------------------------------------

> But, does it really matter which side solid link is on?

=====================================================

Nope! Just as long as they are adjusted correctly.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Re: Left carb is WOT
Posted by: Frank DuVal ()
Date: September 04, 2019 07:24PM

Well, as long as the rods clear the top shroud/shroud under carburetor. And both throttle plates still open full at the same time.thumbs up

Funny, I have never seen these swapped, and I've seen a lot of weird stuff!eye popping smiley

Frank DuVal

Fredericksburg, VA

Options: ReplyQuote
Re: Left carb is WOT
Posted by: mattlockwood ()
Date: September 09, 2019 04:20PM

Still struggling with this. Have received Steve’s linkages.

I’m really missing something here.. I think I fundamentally misunderstand dual carb setups.

When I follow the procedure on page 6-5 of the shop manual(strip of paper between tang and cam, etc).. I get the carbs operating in opposition to each other. IE: with the return spring attached, drivers side is WOT and passenger side is resting on the fast idle cam second (I think) step.

Pull the crossover tube towards the back of the motor (front of the car), the carbs swap positions, ie passenger side WOT, drivers side idle.

I swapped carbs and looked at them both, no misrigged or bent fittings.

I was under the assumption that the carb would work in unison...

If this is correct operation (I really hope it is), my extreme high idle is coming from something else.

Options: ReplyQuote
Re: Left carb is WOT
Posted by: mattlockwood ()
Date: September 09, 2019 05:25PM

I figured it out:

It’s prob obvious but....

Because these carbs are symmetrical, interchangeable, each throttle shaft has two attachment holes opposite each other.

I was using the “same” attachment holes for both carbs, this would require an impossibly long linkage to keep both throttle valves in the same position.

Options: ReplyQuote
Re: Left carb is WOT
Posted by: MattNall ()
Date: September 09, 2019 05:51PM

Way to go!

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Options: ReplyQuote
Pages: 12Next
Current Page: 1 of 2


Sorry, only registered users may post in this forum.
This forum powered by Phorum.