[Vettezuki]

Originally Posted by BRUTAL64

Well, the "WOW" factor and better balance for each runner on a Tunnel Ram.

One barrel for each port. KINDA like FI.

Cost for a cam kit in Solid lifter is much better than a Roller by about 4x.

Tunnel Ram seems to be a type of intake, not a specific model. Were you thinking this kinda thing?

[big2bird]

Originally Posted by Vettezuki

Tunnel Ram seems to be a type of intake, not a specific model. Were you thinking this kinda thing?

Yes. A high rise/tunnel has equal length runners. Also, with 4 carbs, you have one venturi per cylinder, and with seperate runners, you eliminate the 7-8 issue. (5-7 on chevy). It's about balance.
You will also notice the runners are "Free air", read as cooler/denser charge.

[Vettezuki]

Please define the 7-8 issue and free air.

[big2bird]

On a normal intake, the cylinders 7-8 fire sequentially, sending the charge down the same runner for both , one right after the other. Therefore, 8 does not get an equal charge.
"Free air", meaning heat is not transferred from the engine interior/water jackets to the intake runners.

[94cobra69ss396]

Originally Posted by Vettezuki

Please define the 7-8 issue and free air.

Those cylinders tend to run leaner due to the fuel not traveling to them as well. I think a tunnel ram is a little much for this engine though. I would run something like a Victor Jr instead. It would work just as well and would not cost as much (only need one carb) or have the same complexity to install.

[big2bird]

Balance is everything in an engine. V-8's are , forgive me, inherently a POS.
Boxer engines are much better by design, IE, the pistions directly oppose each other, therefore balancing each other naturally, with no counterweights, and very little harmonics. Add individual intake runners like webers, they rev up much higher without internal forces trying to tear them apart. Capische?

[big2bird]

Originally Posted by 94cobra69ss396

Those cylinders tend to run leaner due to the fuel not traveling to them as well. I think a tunnel ram is a little much for this engine though. I would run something like a Victor Jr instead. It would work just as well and would not cost as much (only need one carb) or have the same complexity to install.

Yes and no and yes and no and yes and...................

[94cobra69ss396]

Originally Posted by big2bird

On a normal intake, the cylinders 7-8 fire sequentially, sending the charge down the same runner for both , one right after the other. Therefore, 8 does not get an equal charge.

I need more info on this because I'm not sure I understand. First, I think the cam that is in the engine has a firing order of 1-3-7-2-6-5-4-8 instead of the older firing order of 1-5-4-2-6-3-7-8. But lets say it has the older one. If the air/fuel is already traveling to 7 then 8 opens wouldn't 8 actually fill better than say 1 would because the air/fuel is already being sucked that direction? For 1 the air/fuel has to change direction from the back driverside to the front passenger side so wouldn't 1 get less then 8?

[joedls]

Originally Posted by 94cobra69ss396

First, I think the cam that is in the engine has a firing order of 1-3-7-2-6-5-4-8 instead of the older firing order of 1-5-4-2-6-3-7-8.

You would be correct. I figured this out when I first fired up this engine and used the old firing order. Wouldn't start. Scratched my head, remembered that the engine was not a 68, switched the wires, and she fired right up.

[94cobra69ss396]

Originally Posted by joedls

You would be correct. I figured this out when I first fired up this engine and used the old firing order. Wouldn't start. Scratched my head, remembered that the engine was not a 68, switched the wires, and she fired right up.

How did you adjust the valves if you were using the wrong firing order?