61 model 80 carb id?

[Early Scout]

Hi folks, I did a bit of searching here before this post and couldn't find the info I needed. Seems like most of this carb tech is geared to the newer scouts and not the earlier ones.....?

Im trying to find as much information on the carb in my 61 model 80 as I can. It is not the cute little Holley that I wish it had -- it is a big bowl type carb that looks like a carter or something? Any info anyone has would be greatly appreciated.

Will post pics as soon as I have the vehicle here at my shop.

Thanks!

 

[Michael Mayben]

Welcome to ihon dude! Based on your sig, looks like yore one of the boss' neighbors there in gv!

Yep...we need pics to id any carb that is not an oem item. Let me quess though, it's a rochester 1v of some sort??

Rochesters are normally id'd as such by the logo cast into the main body or bowl cover somewhere. The actual application code would be on one of those "foil"-type tags under a screw head.

There are other 1v carbs as well, carter, zenith, etc., those would also have the foil-type tag on 'em (if still present).

Any oem Holley app would have the actual ihc part number and the Holley list number stamped on the main body at some position.

Pics will tell the story though!

 

[Early Scout]

Thanks for the reply on both threads michael, and an extra thanks for the warm welcome!!

yeah, I seriously apologize for not having any pictures to post, but I really haven't taken but a few of the exterior mainly. I will take a bunch when I get the thing here in a day or so....

I do have one that I just found (that I will post) of under the hood from the other day, but its of 4' away. Dont know if you can tell what's what by that far away, but from other posts ive seen you on im guessing you might be able to...?

Thanks, chris

 

[Early Scout]

Pics.

 

[Robert Kenney]

Best I could from your image is that you have a carter bbs series carby.

I am really struggling to make that out, more is impossible. A close up photo would help greatly.

 

[Michael Mayben]

Shore looks like a rochester to me from that view! I got a few of those, one of 'em came off the '35 IH c-1 peekup I got going on right now.

 

[Robert Kenney]

Zoomed in and compared to old yeller's mixer. Sure look the same and again mm's right. Model b rochester or similer.

 

[Early Scout]

Soon as I get it off the hill (tomorrow hopefully) im gonna steam clean it and take some very high res photos so we can figure out what I've got here.

Right off the bat though im gonna need an air cleaner for it cause mine is missing......

Cant wait to have it all squared away and driving!

 

[Early Scout]

Got her down the hill to my shop and took a whole bunch of pictures. Rebuilt the carb and pulled the distributor and made sure it was all cleaned up and set right.

Problem im having with the carb (really the electric fuel pump) is its just flooding the engine so much that it filled the crank case with fuel and now I gotta drain the two stroke fuel out of the crank case and refill it with fresh non-gasoline reduced oil.... cant believe I did that. Im thinking the gas in the oil isn't doing a whole lot for the hydraulic lifters or the cylinder compression.... Wondering if that was the problem along. Gawd I hate having to unravel other peoples problems.....

 

[Scoutboy74]

So is the oe fuel pump long gone or non func then? Sounds like a fuel pressure regulator and gauge are in order.

 

[Early Scout]

The oe pump was bypassed before I got the vehicle and looked like it was in service for quite a while so who knows how much flooding that engine has seen... Yeah, a regulator and gage are in the works. Gonna start at about 3 psi and go from there....

Fyi, I think im just gonna rebuild the oe pump since it looks like there's a vacuum assist built into it and maybe run the original. Dont know just yet.

 

[Michael Mayben]

The oem fuel pressure spec for all IH I-4/sv motors is 5.5psi inlet pressure. All the carbs used originally on these engines operate perfectly at 3.5>6psi.

Typical aftermarket electric fuel pumps for carbureted applications are sold at rating of 4>7psi, and 7>14psi, some are rated much greater for race-app carbs only. A fuel pressure regulator should always be used with an electric fuel pump along with a gauge to set it, the tick marks on the inexpensive regulators are useless and meaningless.

Do a search on this forum for keyword "fuel pressure", there are more than 30 returns for that keyword!

Is the electric fuel pump pushing or pulling through the oem mechanical pump (perfectly acceptable and I do that all the time)?? If so, and the oem pump diaphragm is punked, then gasoline is pushed directly into the crankcase.

That rochester carb will support an inlet fuel pressure of 6psi if it's done correctly and the float height/drop is set.