[charlie66]

Originally Posted by taff2

The 'two back halves Torker' looks like it would work well, always fancied trying one when I was naturally aspirated.
Here's a couple of pics of the siamesed ports. In the first pic you can see how little of the back of the valve that the flow stream would see if using a normal intake manifold, the flow stream has to 'bend' around the port wall to get to the valve. Every time that the flow stream has to bend around an obstacle it loses energy and creates friction/fuel drop out.
Now look at the second pic, you can clearly see that if the flow stream is allowed to move over (as in a siamesed manifold/port arrangement like mine) ,that there is now a straight shot to the back of the valve.
My ports are nowhere near optimised, the slope/large radius at the floor corner of the ports that direct the flow stream to the back of the valve are not needed anymore, so the radius of these corners could be 'squared off' quite a bit to further increase flow. A good head porter could considerably increase flow through these I believe. Port volume is massively increased with the siamesed arrangment and mine could be increased even further if I cut the dividing wall even further back towards the bolt boss. I only cut the wall back by around 1" as I was advised that cutting back much further MAY cause charge robbing. I also wanted as much strength in the head bolt area for clamping the heads down.

Thank You! That's a cool idea . ill have to try that some day....

[charlie66]

Sometimes I just don't think. I thought I had a good idea hot gluing the manifold together . Never dawned on me that when I start welding the glue would melt and all the parts would fall down like a row of dominos .. Lol

[charlie66]

Got some of the manifold welded today.. slowly getting it done...

[charlie66]

The problem with welding an old cast intake is its dirty metal. A lot of impurities in it.. so u get all those black marks..

[JSPONT]

Progress, looks good.

[tom s]

FYI,i was told by a aircraft guy that if you can find access to liquid nitrogen and put a cast alu piece in it that it cleans it where it is much more easy to weld.FWIW,Tom

[charlie66]

Originally Posted by JSPONT

Progress, looks good.

Thank you Jeff..

There's a lot of areas at the short turn that still need more fill..

[charlie66]

Originally Posted by tom s

FYI,i was told by a aircraft guy that if you can find access to liquid nitrogen and put a cast alu piece in it that it cleans it where it is much more easy to weld.FWIW,Tom

I didn't know that . Thank you Tom...

[Half-Inch Stud]

Didn't read every Post. I've done a few Torkers.

Give Special attention to metal removals to the ceiling blends into each runner. Only Runner 7 is at risk of break-out.

[charlie66]

Originally Posted by Half-Inch Stud

Didn't read every Post. I've done a few Torkers.

Give Special attention to metal removals to the ceiling blends into each runner. Only Runner 7 is at risk of break-out.

can you explain you mean?

[Half-Inch Stud]

Every Runner has a transition into the Plenum. Well, the ceiling transition is crap because the turn radius allow detanced flow that will pick the runner flow.

Increase the turn radius for great high-speed flow.

[charlie66]

I started to do that . But I need more weld to finish.

Thanks for the advice .

[Half-Inch Stud]

Is nice to be able to start the Ceiling blend from the edge of each Carb hole exit, so the Metal acting as the Spacer/adapter/flange is an intentionally-picked reference.

[charlie66]

so what shape would you go for. A round radius or more of s slope?

[Half-Inch Stud]

Holy crap: some auto- word-replacement is going on again with my Ipad.

Detached flow will cause a flow that pinches the runner flow.

Goal: go for the opposite of a decreasing radius turn. So an increasing radius ceiling turn.

[charlie66]

Originally Posted by Half-Inch Stud

Holy crap: some auto- word-replacement is going on again with my Ipad.

Detached flow will cause a flow that pinches the runner flow.

Goal: go for the opposite of a decreasing radius turn. So an increasing radius ceiling turn.

yeah I was trying to figure out what that words was lol.

So I drew a sketch of 2 shapes. The one on the right is what I have now. You're saying this is wrong? Are you saying the one on the left would be better?

[Half-Inch Stud]

The right-side will flow better due to promoting attached flow.

[Half-Inch Stud]

Imagine if a Carb had the Throttleplate exits aimed at the Runners. The fuel/air mix would have a straight shot into the runners, and that would be good.

[charlie66]

Some more progress on the manifold. I think I have enough weld on the flange now to be able to grind it back to a square bore. Added more weld to the short turns and welded on the front wing. Next is getting more weld inside the roof of the runners.... Then the from half of the floor...

[Tom Vaught]

Looking MIGHTY GOOD Charlie.

Tom V.