Turbos Unleashed Cast Header

[nvysion]

I'm really surprised by the small gain using a ported Chrysler manifold.
If I knew that I would have kept the stock unit.
Unless the +3% hides something else, I do not understand why members and even vendors port the stock manifold.

[moparzrule]

Total flow isn't everything. When under 300whp (where a ported stock is most useful), the largest gain when the stock unit is ported correctly is increased velocity for faster turbo spoolup. This increases low and mid range power a decent bit over the stock unit. There will also be top end gains from the increased flow.

I don't think my ported stocker was tested in that 3% figure, and personally I'm pretty sure mine are more than 3%. But with that said, ~3% is going to mean 10whp on a 300whp setup. That's not insignificant for one mod that costs a little over $100.

In my personal testing my ported stocker spooled the same turbo to full boost 300 RPM faster than a forward motion ported unit. Just looked at forward motions' approach, I could tell that it was all ported for flow and that port velocity was not even considered.

Again, to clarify, a ported stock is most useful on 300whp or less setups. TU's header is really designed to have the most gains for over 300whp applications. There may be some gains in the 250-300whp range with a TU header, but IMO not justified by the cost UNLESS you are planning future upgrades (which happens a lot).

[nvysion]

Thanks for your help.
In your post you are talking about port velocity, does that correspond to the exhaust gas speed ?
In this case, the more you port, the more you increase the area for the gas, the more you reduce the gas speed (for a constant flow though which is nearly the case at +3%).
Can someone clarify this please ?

[moparzrule]

Velocity, yes the speed/efficiency in which the air moves through the port. Air is a fluid, anytime you can spiral flow a fluid it will move faster in a given port size (and actually flow more because of the increased efficiency).

TU's header increases port velocity in a different way though. It's a step tube design in which the tube size increases after each port is added into the flow. This design is good for port velocity and does wonders for flow (as indicated by the 33% increase). It's pretty much the best of both worlds, you can only do so much with porting a stocker which is why I recommend the TU header above 300whp applications (though because of it's design it's OK to run on 250-300whp applications but the gains will be minimal).

[DetroitTurbo]

Thanks for offering these again, but I'm going to pass.

Looks like Ajakeski said he will pass on the header, should take him off the list to better represent it.

[daver]

Is there an original thread or information page regarding this header with pics, install requirements etc?

[moparzrule]

There's a couple pics and info in this thread-

http://www.turbo-mopar.com/forums/sh...TU-Cast-Header

[The Pope]

I'm really surprised by the small gain using a ported Chrysler manifold.
If I knew that I would have kept the stock unit.
Unless the +3% hides something else, I do not understand why members and even vendors port the stock manifold.

You can push more air at the turbo with a better header or correct porting. The TU headers takes advantage of porting and cams raised exhaust flow.

In simple terms when you can push a turbo harder, you can run a bigger turbo for racing or have better response on the street with a larger turbo. The real gains come from the larger turbo you can push, not the direct flow like headers on a V8.

[nvysion]

Thanks Rob.

[DetroitTurbo]

2014 bump!

[amoparacer]

Hey let's get this party Rollin add your self to the cast Iron header club buy one today

[zin]

At this rate, we could do a lay-away and have them paid for by the time they are delivered... If it takes 18 months to have them in-hand, that's less than $0.90 a day!...

Who can't afford that!

Mike

PS I already have one or I would be in on this too... Might still, especially if that "last one" is holding up the works.

[daver]

Put me down for one.

[iangoround]

Put me down for one.

I think that makes #18?

[86seeS]

Put me down I'm in

[errol]

Hi Chris, I'm interested in the new production hybrid header so if u'd be so kind to put me down for one thank u. Regards Errol

[86seeS]

That's half way right?

[moparzrule]

Yeah but the 1st half is whats easy, yet that took like forever to get. There's pretty much no way it's getting to 40.

[francois]

There's pretty much no way it's getting to 40.

Oh c'mon!

We are at least 21 and Mike just got 2 more TD. He might jump to get 2 more so...getting close to 40!

[moparzrule]

Our definition of ''close'' is vastly different. Plus, as I said, it's far easier to get the first 20 than it is the second 20.