Weber conversion

[Geoff 67]

I have a late 67 Alpine that I am converting to a Weber DGV. The manifold I got from Classic Sunbeam has two aprox. 7/16 holes taped into it. My old intake had a 5/8 hole on top where the brake booster hose was attached. How do other owners hook up this hose. The attached picture shows the manifold and original plug with nipple.
It looks like I will either need a manifold with a larger hole, or some kind of adapter. Any ideas would be appreciated, and pictures would be helpful.
Thanks
Geoff

 

[PROCRAFT]

View attachment 17491 I have a late 67 Alpine that I am converting to a Weber DGV. The manifold I got from Classic Sunbeam has two aprox. 7/16 holes taped into it. My old intake had a 5/8 hole on top where the brake booster hose was attached. How do other owners hook up this hose. The attached picture shows the manifold and original plug with nipple.
It looks like I will either need a manifold with a larger hole, or some kind of adapter. Any ideas would be appreciated, and pictures would be helpful.
Thanks
Geoff

Maybe you just retap for your fitting?!

 

[Bill Blue]

I would try to get an ordinary hose adapter with the proper thread/hose size. Try good hardware stores or plumbing shops.

Bill

 

[sunalp]

I would try to get an ordinary hose adapter with the proper thread/hose size. Try good hardware stores or plumbing shops.

That's a really good idea! Sometimes you have to think a little differently when converting parts for our cars.
If you run the brake booster from that manifold, don't do it from the top threaded hole. I did that once and the car ran
with a miss that I couldn't locate. Turned out that the vacuum from that port was pulling the fuel away from cylinder
#1. Once I covered that hole, car ran like a top.

Cheers!
Steve

 

[Scott Rodrigues]

I'm running a Weber on my SIV. I'll post a pic of my setup tomorrow with the particulars unless someone else beats me to it. You'll love the Weber!

 

[George Coleman]

That's a Pierce manifold aftermarket If you do not need to use that vacuum nipple, I would get one with the right thread that will fit your hose there should be a hole for the PCV as well?

 

[Geoff 67]

That's a really good idea! Sometimes you have to think a little differently when converting parts for our cars.
If you run the brake booster from that manifold, don't do it from the top threaded hole. I did that once and the car ran
with a miss that I couldn't locate. Turned out that the vacuum from that port was pulling the fuel away from cylinder
#1. Once I covered that hole, car ran like a top.

Cheers!
Steve

Thanks for the reply. If you plug those holes where do you attach the brake booster vacuum hose?
Thanks
Geoff

 

[sunalp]

On that car, I didn't install a booster as the customer didn't want it. If you want to use the booster
I'd use the port under the carb as it wouldn't be pulling vacuum away from a cylinder. Other than that
you can make your own port elsewhere on the intake manifold. I believe your manifold has a blank
area where a PCV valve can be located. You need to drill and tap the hole, but it's pretty easy to get
a vacuum source for the booster.

 

[puff4]

Why not use the existing hole, shown in your photo, at the side of the main plenum under the carburetor?

 

[sunalp]

Why not use the existing hole, shown in your photo, at the side of the main plenum under the carburetor?

That's the one I was referring to. Figured it would pull pretty good vacuum from there.