The Stovebolt Site Forums The Shop Area Engine Shop Carter YF or Rochester B/ BC

Hey folks. Just want to know what you all think is the better carb to run. I got a b and have never ran a yf.

thanks

I have a carter on my 54 chevy 235, i tried using the rochester but i couldnt get it to work right, however, my carter works great!

beast54 what carter are you running?

Pete

I have had both on my dual carb setup. I prefer the YF's, no leaky mess and it was a direct plug in. I didnt have to make any mods for them to fit.

I also have a carter YF...It is essentially a piece of junk (broken and stripped screws etc) but I tried a rebuilt Rochester and it did not run well at all. I sent it back and put the YF back on.

I bought another YF and plan to rebuild it and replace my current carter YF.

Rich

The Carter is better, most Rochester Bs I've ever delat with were either warped or cracked, and sometimes both. Having said that, I actually prefer Holleys over Carter or Rochester.

What carters #s are you guys running?


Pete

Im running a Carter YF787s on my 235

Its on a 216 manifold.
The truck runs real good with it.

If I ever put a 235 manifold I'll try a 2100s.

Thanks,DADS50


Pete

My B leaks but it works... I'd try the Carter.

Cool. I have a rochester right now and rebuilt it about a year ago. Worked great but has always taken a little adjusting with weather, so I guess it worked ok not great. It is now getting hot again and it is starting to leak and cut out when driving. Idles great. I am gonna grab me a Carter YF this week and compare the 2 and see witch is better.

This is what it looked like after a little cleaning on the first rebuild.

http://memimage.cardomain.com/ride_images/3/3457/1021/33640510059_large.jpg

http://memimage.cardomain.com/ride_images/3/3457/1021/33640510057_large.jpg

Was bad. Sat for 12 years with fuel in it. So Im sure I could have cleaned it better. Was just dieing to hear it run.

I will have to look at my carter to see exactly what it is. I want to say i have a YF.

ok, Got a yf yesterday and a new rebiuld kit for my Rochester. Im gonna Run them both and see the diff. I may try and get a video as well.

GrandpasTruck

Just wondering
What model # Carter yf Did you get?
Should be stamped on there somewhere.


Thank you

Ill look when I go pic it up, Just knw its a YF. Think I should have saved the extra money, Did not think the Navy was gonna cut my pay this month.

Here are the photos of my Carter YF carb. Not sure what kind it is but Ill see if it works. It has no ID number on it. Think may be a 877SA

http://talk.classicparts.com/picture.php?albumid=180&pictureid=1539

http://talk.classicparts.com/picture.php?albumid=180&pictureid=1540

An 877s cater YF is for a 50s Nash ,I hope it works for you.

You gotto check if it has port distributor vac. or manifold distributor vac.

Where the fitting is to hook up the distributor look in there and see if the hole is above or at the throttle plate if it is it's port vac. thats what you need ,no vac. at idle. If it's below the throttle plate it's manifold vac. and you'll get full vac. advance at idle and the engine will not run right at idle.


just went thru this with a carter YF4480s carb ,you have to check and see what year the YF is for ,Carb King just did a list on what year carters were made for do a search and you'll find the list. My problem came up when I installed the carb ,after rebuilding it, to find that the distributor vac. was below the throttle plate making it manifold vac.where the 216-235 family of engines needs port vac. no vac.no advance at idle, the 4480s was made for the 194-230-250 family of engines which uses a different distributor that uses manifold vac.its full vac. advance at idle. after installing the 4480s the engine would not idle right so when I checked the timming it was at 20+ degrees at idle the 4480s was made for a different application.

If you look at the distributor advance,vac., hole thats in a Mod.B or carter W1 you will see that its at or just above the throttle plate so there is no vac. at idle ,port vac, thats why the shop manual does not say to disconnect the vac line when you time a 216-235 engine.Then when you get a newer engine 194-230-250 you will see the book tells you to disconnect it so there is no vac. at the distributor when you time.Then when you reconnect it after you time it the advance kicks in.

So check the Vac. distributor hole in relation to the throttle plate above or at is port, below is manifold.You need port vac.

There are YFs that were made for the 216-235 family of engines.




Pete

Ill have to look. Could you not just switch it to manifold vac. like they do on the 258 I6 in jeeps. And the old 350's.

The distributor is different and it's set up to use port vac. none at idle.

Pete

Ok looked at it. It is manifold Vacuum. So Ill ether change the distributer to run on manifold vac or change carbs. Ill mess around with the distributer for a while and see what I can do. See if I can run a new distributer that might be manifold vac.

Thanks for your help Pete52.

here is a good thread from "carbking" about the carters

https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=727568&page=1

Ok thanks guys. That is a super helpful link. Ill see if I can make it run on Manifild Vacuum. If not guess Ill jump on and get a diffrent carb.

Here is were my vacuum port is on my carb. Im sure its manifold vac.

http://talk.classicparts.com/picture.php?albumid=180&pictureid=1542

Thanks All

It's manifold vacuum ,I looked at it to with my 4480s carter and I'm going to find a 2100s one of these days at a swap meet I hope.


Pete

If anyone is looking I'll soon have a near new 216 intake and exhaust manifold with a Carter on it. This is off a new old stock engine I found in a crate in Alsaka. I'm upgrading it now with the intake, exhaust and doing a full oil pressure conversion too. Let me know if you might be interested. I like to trade or.... ?
Normbc9

well you got me. What you want for the carb. I dont got much. I have my old vacuum wiper set up and a extra vacuum fuel pump but that is it I put the rest to work.