I think you need to first know how much more power you are looking for or what your goal is?

 

Assuming that:

Aggresive Comp cam (274) with long tubes and some minor mods can do that:

Comp Cams Hemi Phaser "274" Camshaft for VVT 5.7L & 6.4L HEMI Engines 201-428-17 274WI16

or that:

Cam for New Gen Chargers?

I would like to achieve 450 crank HP, but when something goes wrong it could be that:

2012 Challenger RT COMP 270 VVT camshaft dyno results
- where there's a significant loss under 4000rpm. I would like to avoid any tq losses, especially that our Durangos can cruise at 1500 or so rpms.

PS
The Tazer shows that my Dodge does 0 to 60 in 6,1-6,2s. My goal is to do it in low fives.

 

I think if you're going with a more aggressive cam like the 274 you will also need to swap the rear end to a lower ratio to keep rpm's in the upper range where your power will be.

 

Have you thought about the ripp supercharger kit? It doesn't seem like it makes any whining noise like the Whipple, since it's basically a belt driven turbocharger.

Sent from my SM-G935T using Tapatalk

 

For decades long tube headers were better for low end response than shorties.

 

Chase300:

274 cam is too aggresive for me, besides I don't want to change rear (and front) ends it will decrease many things (like fuel consumption). I think that Modern Muscle cam would be the best https://www.modernmuscleperformance.com/product/57-hemi-vvt-na-performance-cam. It's described as "1400 to 6400rpm" what I like.

Skippy426:

I thought of it but I'm not sure if it works well. I can't find any videos behind the wheel or wide range dyno charts...

MWeed:

When you talk about inlet manifold that is true - longer runners cause more tq at low revs, shorter at high revs. In exhaust manifolds there is the opposite - short tubes make a little more backpressure which helps at low revs, long tubes are very efficient at high revs but decrease low rpm tq. AutoAnything: "(Long tubes) These are great for high-revving machines and track terrors, but they do sacrifice some of the low-RPM power that most drivers depend on. On the other side of the coin, shorty headers deliver more power horsepower and torque from idle to the mid-RPM range." But in fact I found some articles which tells something different.

 

Got it.
Yes, I believe MM has custom ground cam shafts that should work well for your rpm range.
With that in mind, I'd also consider putting the 6.4L active intake on as well. That will increase low end Tq. yet still give high rpm hp.

 

How this active intake works? Is it controlled by ECU?

 

Yes.
supposedly you can wire it directly in on 2013 and up model years so the ECU controls but I've not seen actual instruction or proof of that.
So what you do is install a MSD window switch and set it to turn on at 4800 rpms which is where the ECU activates it to switch from long to short runners.

 

Is there anyone who did it? Does it work? It sounds interesting but I think it can be hard to do.

 

Not sure how hard it really is, intake swap would be easy.
Here is a guide;

Challenger 6.4 Intake Manifold to 5.7

 

OK, thanks Chase300, this may be very useful!

 

If you are worried about performance, don't. The factory cat is a high flow design. Yes it is nice to have a loud exhaust, if you don't want to talk to somebody else without shouting or if you want to listen to tunes without making it loud enough to hear 3 blocks away. Besides, other folk might not like your choice of tunes. Otherwise, why not just cut them off at the Y-pipe and get it over with?

 

Factory exhaust in R/T is almost fantastic - quiet when cruising, loud at WOT. It is just luck of some bass from it. I want to make my Durango quicker without any side effects

 

There is a dude on instagram who put a cam in his 6 speed awd Durango truck made about 385 whp with long tubes n exhaust

He used inertia motor sports cam they do a lot of mopar stuff.