wannadiesel

Kevin- I think I understand why the splitter plate is needed in tubing, but can you explain why it's needed with what I'm planning? It seems to me the big box will have pretty much even pressure throughout and slow flow down so that velocity won't have any effect on where the gases flow, then as long as the stacks are of equal diameter and length flow should be pretty much equal. What am I missing here? You're right, I don't want to screw this up and have a weak stack and a strong stack, it'd look funny.

Whitmore

First off with the exhaust system you are planning there will be very little back pressure and this is a good thing, the lesser backpressure the better for a diesel, and without a splitter the exhaust would take the path of least resistance and that would be aprox 80% to the pass side.....I tried to find a pic of the Y splitter but dont know the part number but anyhow if you were to look at the side of this Y it would be a 4" circle with a plate dividing it into 2 equal parts of half circles so the exhaust would leave the turbo and downpipe and when it enters the Y it would be exactly 50/50 delivering exactly the same amount of smoke to each stack.......so if I may try again your stack header box will be one piece but inside it will have a plate dividing the 2 sides this is hard to explain but a pic would say it all..............I somewhere have a parts list for my stacks and the Y is in there , I will try again to find it.

Cheers, Kevin

Mudcat

I've seen this setup before without the divider and the smoke was equal as I could see. I am planning to put a piece of ange in there to divert the flow to each side rather than running into a flat wall . But not dividing the whole piece of tubing into 2. Just something to help it flow towards the outer ends easier.

mhuppertz

Just for information sake, 1' of flex pipe has the same resistence as 10' of the same diameter smooth pipe. If you use giant pipe, the effect is lessened, but the ration stands.

fearthedeere

So are you sayin flex tubin is bad?

Forrest Nearing

makes sense... seeing as 1' of smooth pipe has the same resistance as 10' of the same diameter smooth pipe! LOL!

Forrest Nearing

it's not bad... it doesn't flow as well as smooth pipe, but you wouldn't be able to quantify the difference on the dyno...

Forrest

fearthedeere

oh ok lol im scared to dyno i might get laughed at jk

fearthedeere

Ok can anyone show me their setup of their stacks. And a parts list would be great too. Im really set of stackin my truck just gettin to that stage is the key.

diesel_kid

I just got convinced on getting stacks, I was trying to steer around it as I have a tonno cover on my truck, but I want to make my own roll bar also, and its just tougher to do with a tonno cover, so its going away, and Im pretty sure I am getting stacks. I am just not to crazy about this stack header, wont it create alot of backpressure? I want to figure out a way to create as least backpressure as possible.
What I was going to do was have a 4" downpipe then 5" from there all the way to the box, having mandrel bends all the way. Would say having two 45 degree bends have less backpressure than one 90 degree?

Or is this all just a waste of time me worrying about the backpressure since im staying under 500hp?

Thanks

-Jared

rebal

just wondering can you go under the fuel tank and go up on the out side of the frame and put a heat sheild at the tank looks like room for 3.5" pipe without cutting the beds cross member then you could bell up to 4" or what ever size or use a Y and split it under the bell housing looks like it could work