Hi everybody!

i have an 8-71 BDS supercharger on my BBC. The intake manifold does not have provisions for a thermostat, so I have an external thermostat housing. I have lines running from the two front intake water ports to the thermostat housing.

Now for the question:

To improve water circulation, can I just run a line between the two rear intake water ports, or should I connect the two ports and than continue the line on to the thermostat housing.

Thanks in advance for your opinions.

Brian

Most supercharged engines that I have seen, just connect the two rear water ports, but I was wondering if continuing the line on to the thermostat housing would improve circulation/cooling.

Anyone?

Brian

It will increase flow from the rear end. And make less gas pockets.

I seen it be done with 4" 3/4" pipes into one 1-3/4 pipe

Hi godsend!

Thank you very much for your reply. I appreciate your input.

Brian

Brian, that's exactly my problem right now. On my old manifold there was a T-Stat housing provision on the manifold, and I just plugged the rear ports, but my new race manifold has nothing, I have to bring back to front and then join 4 -6 lines into one block that have a -12 out to my radiator. This is what's holding up my project, I want to bring the rears forward for increased cooling but am limited on how to route the hoses. I'm sure I'll figure something out tho. What kind of manifold are you using?

Hey J70Chev!

Thanks for responding to my post.

I am using a BDS 8027T manifold. It is on a Dart Big M Tall deck block.

I have two lines going from the front water ports of the manifold to the thermostat housing. I will either run a line from one of the rear ports to the other right in front of the distributor, or go from one rear port to the other and than on to the thermostat housing. If I am already going from one port to the other, it isn't that big of a deal to go on to the thermostat housing, so I may just do that - nothing to loose...

I did check out the links that you have listed and you have some prety impressive stuff there. Good luck on your project and let me know how it goes.

Brian

Just got off of the phone with BDS (Not always the most responsive - maybe I don't ask the right questions), anyway... they said that the rear water ports do not need to be connected. Less work for me...

Brian

Thats cool, I probably could get away without connecting mine, but I figure I'd get better cooling if I had the water exiting from the rear somehow. On the old motor I just had my temp gauge plugged into one of the rear ports.

Ok J70...
I'm still going back and forth. I certainly don't think that connecting the rear water ports would hurt, and it could help, so...

You might be talking me into it again.

Brian

They dont need. But if you can i think they should.

On a Supercharged engine youll get gas pockets fast if its overheated.

On my new engine i will revise the cooling a bit and use adapters in all freeze plugs to send water in, in more places. And use a higher pressure.

Turbo engines makes alot of heat aorund top of cylinders and i want a good stable flow around them.