Holley Carb.Fuel Pump vent hose location?
 

As I have posted before I am switching from an Edelbrock to a Holley carb...I just noticed that I can't find anyplace to put the fuel pump vent hose on the carb.....Seems like my old motor with a Q-jet on it had the hose going to flame arrestor but Im not sure. If so since Im running a K&N do they make a fitting for the hose or am I mistaken about the q-jet stock flame arrestors.....
Here is the pics of the carb...

BH

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My K&N has a hole on the bottom that I put a rubber grommet in and put the vent line in the through the grommet. I can't remember if I had to drill the hole or it came that way.

Hey Bad.........just got mine yesterday and was wondering the same thing. Just a guess, but is it the fitting that is plugged with the lil piece of hose, or is that strictly vacumn.....?

What are you going to run for a linkage bracket?

Did you say you picked up a trick kit for it? What's the #?

That vent line is there in case the diaphram ruptures. On a car it would just leak on the ground.
On a Q-Jet the tube attaches to a fitting on front of the carb. Not sure where it goes from there. Maybe to the float bowl?
I wouldn't attach it to a vacum line, try the flame arrestor. I'm surprised that Holley didn't provide a fitting for it.

BH,
Depending on the manufacturer of your flame arrestor, there is a barbed fitting that is incorporated in the arrestor where the tube connects. In the case of a diaphram rupture the fuel would be diverted through the arrestor and into the carb. I believe any part advertiser on this site could help get you this fitting. Hope this helps.

Paul

Badhabit........

Did a lil research, and it looks like the small plugged line is for vacumn only. If the carb came with a fuel vent (ours did not), it would have been to the left of the primary float plug between the choke and the plug on the angled area. Guess you'll hafta run one on the flame arrestor.

I figured the linkage out also........still wondering about the trick kit tho if you have a part #.....

K&N makes an adapter for the vent hose just like the crankcase vent hoses only smaller.
My only question with this entire set up is....since liquid seek its own level...if the diaphram leaks , why would it go up the vent tube to the carb , when there is a LOWER , EASIER path right into the crankcase?I realize if you have the water pump mounted fuel pumps this won't happen , but how about the block mounted ones?

Trick Kit#37-1541
Jet Assortment Kit#36-181
The Linkage plate is Summit Part#SUM-G1419

I think I will just drill the hole under the Flame Arrestor instead of bolting the adapter on...I already have to much hanging off the damn thing now!:crazy:
Here is the adapter.

BH

Using the K&N adapter, what's to keep the fuel from running into the flame arrester housing and down around the carb onto the intakes? The arrester fits around the outside of the base on mine. Like to get some opinions before drilling any holes!! :D

Holley 800

Here is a picture of one of my K & Ns with the fuel line.

Sorry I could'nt help you guys out with that one...sorry bout the delay but I was outa town. I did'nt have to deal with that problem with those carbs in that I had used the factory electric fuel pump thats in the pics...and it has no provision for an overflow. I agree with another post here in that if the diaphram ruptures and fuel flows into the base of the flame arrestor it could still drip onto the manifold. I would assume the coast guard would find such a provision unacceptable unless the tube you were connected to entended inside the flame arrestor and directly into or over the carb. Maybe thats not a problem for you there...but here on the Great Lakes one of them threatened me with a ticket because he was able to rotate my flame arrestor a little bit by pulling it pretty hard with his hand! You might want to consider something along those lines....Glenn

I followed rbtnt's idea and drilled a hole in the base of the K+N. I remember that Holley and Mercruiser both make flame arrestors with the fitting ON THE ARRESTOR for the tube. Anyways I put my tube thru the arrestor and zip-tied it along the j-tube facing down.....The zip is just loose enough so I can wiggle the tube free if needed.


BH

Hey BH, did you get the off idle bog figured out. Just wondering what you found, i'm gonna be putting mine on this week. Can you buy different shooters for this model?

Trying to be prepared for all potential problems....:D