The video by Nick was very enjoyable

This thread is not...

Nicks testing is honest and not endorsing a product. The OPPOSITE of sunday morning TVs Powernation or that stupid Hagerty Insurance YouTube channel. Nicks heavy accent is a Greek accent. Lots of nice cars in his shop of all makes.

He had an engine on dyno and exhaut manifold to play with, with customer approuval, that's it.
He said that he had to adjust A/F with the header.

Maybe header help that combo more than others. 6-pack may have more breathing capacity and perhaps magnum manifold was limiting breathing capacity of the 6-pack.
Perhaps the header help to generate more HP with Low CR and unknown cam.

At least, he show his dyno screen, does not hide A/F ratio and other data, like many other.

I like Nick and appreciate his stuff. fun to watch and entertaining.
The quality of filming/audio/editing from his media partner is well put.
I doubt they have the production budget of engine master/powernation or other. And yet Nick is as much informative in his own way.

I’m going to need neck surgery from shaking my head so much. This thread should come with a warning.

No one is implying that Nick cheated. They are saying that the dyno test only shows one variable. It’s like reading one page from a novel and claiming to know the whole plot. Oh wait, it’s 2021 where whatever we feel is reality, and you all must bow to MY reality!!! #BlackHeadersMatter #Justice4Nick #WOMANifolds #MyMotorMyChoice

Nice reply MountClaire!

ALL MANIFOLDS MATTER and thats that!

What you guys are saying is 'NOTHING IS REAL'...Especially if its on YOUTUBE!!!

You read a book, watch a film, go to the football game and take what you want from it!

KEEP IT TO YOURSELF, we don't want to hear about 'reds under the beds' again...

I agree. This is more like a "I wonder what would happen if I.....jetted my carb richer, jetted it leaner, increased total timing, reduced total timing.....?" It wasn't meant to be a doctoral thesis.

You could substitute the word “headers” with a variety of other components and that would still hold true.

You have to look at tests like this through the lens of “how does this compare to what I’m doing with my own package?”

On a 250hp 7.7:1 400-2bbl the difference between headers and manifolds will be pretty minimal.
On a 1000hp 572 with B1 heads it’s probably going to cost 150-200hp by putting manifolds on it......... maybe more.

The results of any test like that only shows you one thing......... how that exact particular combo responded to those exact particular changes.
Which is just as likely as not, going to have any relevance to what you’re doing with your own car.

One thing remains the same...headers make more power than manifolds.

Yes.
I''ve never heard of anyone that removed headers and put manifolds on to GAIN power.

There was a thread here from maybe 2-3 years ago where the build was some sort of 500” stroker with TF240 heads and a 6-bbl intake with a hyd roller cam designed to supposedly be ex manifold friendly......... and as I recall the power difference between the headers and manifolds was in the neighborhood of 90hp.

I really enjoy his videos and his production/editing/voiceovers are great - it’s done by his cameraman - can’t recall his name😀

A 44 HP gain by going to headers from stock HP manifolds? That is a LOT!

BUT, I will say this - I don't think Nick would doctor this & pull some funny stuff behind the scenes. If he's just swapping from the stock, to the Max Wedge, to headers, & doing dyno pulls, then I think we are seeing actual true results. I'm just really surprised there is that much of a difference. In this test, the stock HP manifolds are the baseline so he's doing the comparison right.

Did any of you watch the denting-the-headers test that Freiburger did on Engine Masters? They almost CLOSED several of the primaries before they started registering any HP losses on the dyno. That was quite an eye opener. Toward the end, I can guarantee you by the time they were 3/4 of the way through the experiment, those headers were not flowing well.

i dont think anyone meant harm in posting here. its easy to take things written wrong.. they saw improvement on that engine that way. i think thats very true. the point was ,,, can i get the same increase by changing the cam/port exhaust velocity ..... or other items ? its all air flow .this shows a weakness in the engines ability to get air out of the exhaust side.. i dont care how you get it done. the wrong set of headers will hurt it. this is more about -tuning- than actually making power .. simply put, just adding headers to an engine does not mean it will make more power. if the engine needs help with exhaust ,it will help and the better matched to what the engine needs the more help it will be.

....and, if I remember correctly, the cam choice, although believed to be a good choice, really was not that great of a choice.

The debate rages on. The two side will never come together. Budget matters, and what you start with in parts will matter. Headers will make more power. In the end build what you want.

If you want to build a 475 hp exhaust manifold std stroke 440 with iron heads and pump gas, no big deal. If you want 525 hp, you should probably use headers.

If you want to build a 550 hp exhaust manifold stroker with aluminum heads, no big deal. If you want 625 hp, you should probably use headers.

No BS from BSb ...

Now WHERES some of those extrude honed mans ?

LIKE done on that FAST hemi Road Toad ?

It's real easy. An optimized combo with headers will outperform an optimised combo with manifolds. The milder the combo producing lower output, the closer the gap. The lower the output, the closer the gap between lousy manifolds and really good ones. With headers being lighter, along with the power output increase, you cant loose. Now if power isn't the main concern, rules, or ease of installation. Then manifolds may be the right choice.
Doug

Engines are so complicated no human has yet fully understood them.
Dynos are only slightly less complicated than engines.
No test is perfect.
Most moparts members do not have evil intent.
Life has been more stressful for months.

Lightin up motorheads.

Well said 360viewer!

If Nick's dyno was the only one in the World then we have a problem.
But I'm sure Westech has got one and I know Tom Nelson has one, been there 'seen and heard' it...
Bet there's a few more in the Mopar world too, lol...

The point being, THAT COMBO HATED HP MANIFOLDS...

Is there a better combo for an iron headed sixpack engine???
The whole point of the dyno is to show us in real time, what's what!

Nick said it was a lower comp engine and the cam was lumpy.
Probably a bad combo and the HP manifolds made it a whole lot worse...
Back somewhere in the 4bbl range of boringness...

Give it a rest.