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 
secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: kfeldt ()
Date: November 21, 2017 11:44AM

On my 64 corvair 110 hp, I just noticed that one carb has a primary venture and the other carb has a secondary venture. Is this correct?



Edited 2 time(s). Last edit at 11/21/2017 06:17PM by MattNall.

Options: ReplyQuote
Re: secondary venturi in a 110 hp 2 carb engine ?
Posted by: MattNall ()
Date: November 21, 2017 11:47AM

Nope... but it will run OK... just no choke....and no accelerator pump most likely.

Are you sure you don't have a 1960 carb? [ no choke butterfly that year. ] But has an IDLE Mixture screw in carb body.





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




Edited 1 time(s). Last edit at 11/21/2017 12:17PM by MattNall.

Options: ReplyQuote
Re: secondary venturi in a 110 hp 2 carb engine ?
Posted by: MattNall ()
Date: November 21, 2017 11:49AM

Pictures will help us determine exactly what you have.





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: secondary venturi in a 110 hp 2 carb engine ?
Posted by: kfeldt ()
Date: November 21, 2017 05:04PM

Well, I tried to download a pic but it keeps saying the pic is to big. But the carb has no tag on it. The carbs are exactly the same inside and out with accelerator pump and vacuum choke. Just that one has a secondary and one has a primary venturi. The corvair is a 1964 with a 1965 rebuilt engine, at least the crank case #s show a 65 case. Top case cover is a 64, as I found out when I had to replace the cooling fan blower bearing. If the different venturi nozzle angles don't affect the fuel delivery than I will just leave it as is. Thanks for your quick response.

Options: ReplyQuote
Re: secondary venturi on a 110 hp 2 carb engine ?
Posted by: davemotohead ()
Date: November 21, 2017 05:14PM

I think you are talking about the venturi cluster and not the venturi, I also think you are talking about one is at a X angle and the other is at a Y angle. meaning you have a early model venturi cluster (X) and a late (Y).





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

Options: ReplyQuote
Re: secondary venturi on a 110 hp 2 carb engine ?
Posted by: kfeldt ()
Date: November 21, 2017 05:24PM

Yes, sorry for my pour description. I am talking about the cluster. One is a y and one is a x. I think the guy that rebuilt the engine just threw anything he had in it to get it out of the shop. That is exactly what I needed to know. I'll pick up another Y cluster to even them out. Thanks!!!

Options: ReplyQuote
Re: secondary venturi on a 110 hp 2 carb engine ?
Posted by: MattNall ()
Date: November 21, 2017 05:28PM

Sadly there are many different Clusters.... this is where Bob Helt's Carb Book comes in...

Eyeball and measure when you find some..





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: secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: Frank DuVal ()
Date: November 21, 2017 07:59PM

Yes, buy Bob Helt's Rochester carburetor book. It unlocks many secrets!

You confused us with the primary/secondary description.

A 140 engine (only) came from the factory with primary and secondary carburetors. Both had the same looking venturi clusters (Y).

The change from equal length and spacing (X) arms on the venturi cluster to the unequal spacing arms is 1963 to 1964.

I would put in two Y type venturies. They have 4 arms, just at odd angles. I would also use the book to see the differences between 1964, 1965 carburetors to make sure you had the same bottoms and tops.

Frank DuVal

Fredericksburg, VA

Options: ReplyQuote
Re: secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: kfeldt ()
Date: November 21, 2017 09:34PM

Thanks to all. I have Helts book and a few others on order. This is a great forum with some great folks ready to help.

Options: ReplyQuote
Re: secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: MattNall ()
Date: November 21, 2017 09:35PM

You welcome!





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: secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: cnicol ()
Date: November 22, 2017 07:27AM

In your search for the correct cluster/spray bar, you will find the number cast into it is almost useless. There are only a few casting numbers but they're drilled differently to create many different final part numbers.

The various hole sizes drilled into the cluster should be carefully checked vs. the chart in Bob Helt's book. Those holes are just as important as the main-jet - in fact they work together with the main jet to create the final mixture.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

Options: ReplyQuote
Re: secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: kfeldt ()
Date: November 22, 2017 03:55PM

After the two different style venturi clusters I tore the other carb apart and one had a #51 main jet and the other had a #49 main jet. So more parts to order and two accelerator pumps.

Options: ReplyQuote
Re: secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: steve c goodman ()
Date: November 22, 2017 07:38PM

Are you certain both carbs are 64? There are several changes in the carbs through the years. 1964 was a single year. Good to have matching carbs.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC



Edited 1 time(s). Last edit at 11/22/2017 07:40PM by steve c goodman.

Options: ReplyQuote
Re: secondary venturi cluster on a 110 hp 2 carb engine ?
Posted by: kfeldt ()
Date: November 22, 2017 07:55PM

Not sure about anything with these carbs or engine. I was told it was a rebuilt 65 engine that was put in this 64 Monza. but I have found #s on this engine that are both 64 and 65 #s. So when I get Helts carb book. and do more research on the carbs and engine #s. Thanks Again.

Options: ReplyQuote


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