Technical Weiand SBC blower manifold

Was able to get this bad boy recently has anybody ever used the back water p***ages to a water pump

 

I drilled and tapped the front of my heads for 3/8 NPT rather than use the water ports at the back of the manifold. I think it’s cleaner look.

 

I have run both ways as above , (SB&Bb)
But I used 1/2 & 3/4 pipe , head/intake,
On intake rear milled the original outlet off , & retapped ,
In my opinion this way ( bigger size ) gives you the option from bigger to smaller size ( hose ID ) if needed .
Each build requires different then others, # 10 seem to be a efficient size ,
But in some case #12 was used .

 

I've got that Weiand and an Edelbrock B-10 for running the Isky set-up. Here's the sketch. Pretty sure its the same one in that Popular Hot Rodding issue. We used to run hoses from the rear ports to a thermostat spacer on some stock car racing set ups.

 

Not on an SBC, but I did on my Hemi.

 

In an old SBC, the coolant flows from the pump into the front of the block, then back along the block and up to the back of the heads, then forward through the heads and out the front of the heads, to the thermostat, and out to the radiator.

If you put the hoses to the thermostat at the back of the heads, then the front of the heads will likely overheat. That's why you have to drill and tap the front of the heads, to connect the hoses that go to the thermostat housing.

 

So it was a thing...
This set-up came with a isky driven 6-71, compe***ion manifold.

 

You’re talking apples and oranges @gimpyshotrods , your hemi heads are drilled and tapped front and rear so Chrysler didn’t have to catalog right and left heads and the OP asked about his manifold. For your mid-engine deal it makes sense with your radiator position, but maybe you should consider what @squirrel said in his post.

 

I did. I don't miss things like that.

I already drilled the block deck, to properly direct flow.

I modeled the existing flow in the simulator, and located the defects that Chrysler built into it.

My flow redirection removes those defects, so it actually flows and cools better than the original configuration could.

 

How well does it cool?