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Username Post: Holley Carb ID        (Topic#349195)
Stinky 
Senior Member
Posts: 1593

Loc: Whitewater, CO
Reg: 05-25-01
01-16-18 10:35 PM - Post#2721245    

I am fixing to buy a a mid-engine dunebuggy. It has a VW transaxle w/coil-overs and a Corvair in it. Weight should be around 1,000#

I've forgotten most everything that I ever know about Corvairs.

The motor is maybe "Triple-ported," where the intake is milled off the heads and then runners are welded on to it at each intake valve's runner (I am not sure if that is the correct term). The intake manifold then attaches w/short rubber hoses(2-3" long) and there is a spider w/6 runners. On top of it is a Holley 4 bbl carb.

On the base it is marked 12R-1836B. This seems to be a standard base for a Holley carb.

The horn is marked 9776 and 1396. 9776 seems to indicate a 450 cfm model 2300 that is designed for tunnel-rams.

What does the 1396 indicate? It sorta seems like it is the rebuild kit number. But, if so, it should have a number and a dash in front of it.

Does the above make sense?

Also, the fuel plumbing seems like the fuel pump is pumping air into the sealed fuel tank (the problem? Could the tank not be vented correctly?) as the bottom of the tank goes straight to the carb, and the intake side of the FP sucks air (through a fuel filter) and then hooks to the top of the fuel tank. It ain't like nothing that I've seen before.

Additionally, there is a line, running from the oil pressure gage, that goes in to the plenum...what is up w/dat? I haven't looked in there. Could it be to heat up the air/fuel mixture?



 




5Larry7 
"14th Year" Gold Supporting Member
Posts: 1927
5Larry7
Loc: Dallas, TX
Reg: 05-17-04
01-17-18 10:26 AM - Post#2721272    
    In response to Stinky

I had a Corvair powered dune buggy many years ago and I used a 4 barrel manifold that connected into each stock intake port on a 140 engine, (4 carbs). I ran a line from the engine oil pressure to under the carb plenum to warm it up. Worked ok. As far as the fuel tank goes, does it gravity feed to the carb? Perhaps that is your scheme and the air pressure gives it a little extra push. Does it work?

'57 210, 327 cid, Holley MPFI, 700R4, A/C & more.
'51 Studebaker Starlite coupe, 350, TH400, GV OD.
'96 Replica of a 1950's Teardrop Trailer.


 
Rick_L 
Honored Member
Posts: 27332
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
01-17-18 03:28 PM - Post#2721306    
    In response to 5Larry7

Back in the 60s/70s, a lot of small engine dragsters used a pressurized fuel tank instead of a fuel pump. The typical installation had a little bicycle pump to do the pressurizing. Of course the pressure won't hold long and will go down as fuel is consumed.



 
Stinky 
Senior Member
Posts: 1593

Loc: Whitewater, CO
Reg: 05-25-01
01-20-18 08:10 PM - Post#2721639    
    In response to Rick_L

Well, the beast is in the driveway...it followed me home...towed nicely.

The tank does have a schrader valve on top. So, it is built to take compressed air.

The tank is below the carb, and way below it when hill climbing.



Edited by Stinky on 01-20-18 08:11 PM. Reason for edit: No reason given.

 
IgnitionMan 
Valued Contributor
Posts: 3303

Reg: 04-15-05
01-21-18 09:51 AM - Post#2721664    
    In response to Stinky

LIST- 9776 is the Holley identification list number.

The second set of numbers is the production number, 1396. Code:13, day, 9, month, September, 6, year, 1976, 1986, 1996, etc.

Also, if that carb is a 4bbl, it is NOT a 2300 series, the 2300's are two barrel design.



 
Stinky 
Senior Member
Posts: 1593

Loc: Whitewater, CO
Reg: 05-25-01
02-03-18 06:41 PM - Post#2723229    
    In response to IgnitionMan

Ignition Man you are correct. I was looking at 2300s on the net and got my numbers crossed.

I meant 4160

https://www.summitracing.com/parts/hly-0-9776



 
IgnitionMan 
Valued Contributor
Posts: 3303

Reg: 04-15-05
02-03-18 07:19 PM - Post#2723234    
    In response to Stinky

I worked at Holley for a few years on race carbs.

Those carbs like regular fuel pumps, between 5.0 and 6.0 PSI fuel pressures. An air tank sysem may well give too high a fuel pressure to the needles and seats to run correctly. then, when they run rich, people lean them out too much, and the carb gets a lot worse.



 




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