20 replies to this topic

[Jay6spdRT]

Saw this kit on Arrington's site

http://www.shophemi....e-manifold.aspx

With the proper adjustments to the tune, what sort of HP gains, if any, could I expect? I believe the gains are less in the 2009 and newer 5.7s due to a more efficient albeit plastic intake manifold.

And this comes with a throttle body? Is that beneficial? Will the 5.7 T.B. work on the manifold, or does thbe 6.1 T.B. improve performance? Thanks!

[70Barracuda]

I don't think it's going to get you much. There is an article in a magazine called Mopar Now that I found at Barnes and Noble a few weeks back where they bolt various intakes on a 2006 R/T Charger including the 6.1 intake. Dyno results were as follows (remember also Jim that this is the earlier 5.7 so HP gains will most likely be higher than on our 5.7's), with stock 6.1 intake they gained 9.48 HP and lost 5.01 lb/ft of torque. With a stock current 5.7 intake (ours) they gained 3.71 HP and lost 2.18 lb/ft of torque.

I

[70Barracuda]

And this comes with a throttle body? Is that beneficial? Will the 5.7 T.B. work on the manifold, or does thbe 6.1 T.B. improve performance? Thanks!

I'm fairly certain that they both come with the same throttle body, at least when you order an aftermarket one they generally list the same for both motors. The 6.1 intake has a 82-85 mm opening (depending on who's write up you want to believe) so if you aren't going to do any porting probably 85mm is as big as you want to go. However since the 6.1 intake is aluminium you can certainly open it up larger and add a 90mm or larger if you would want to.

[rdrdr90]

The 6.1 manifold flows 1 cfm better than the stock manifiold with the Eagle heads. The benefit is you can do more to an aluminum manifold than you can a plastic one.

As I recall, the TB's, stock, are the same.

If you were looking at a centri blower, then this is.something to consider...

[Bailman]

The 6.1 manifold flows 1 cfm better than the stock manifiold in the Eagle heads. The benefit is you can do more to an aluminum manifold than you can a plastic one.

As I recall, the TB's, stock, are the same.

If you were looking at a centri blower, then this is.something to consider...

What he said except I thought it was 3cfm less than a 6.1. You can pick them up used from 6.1 guys upgrading for less money. I think for similar money you can get better gains from a installed cam with a cmr. Believe me those eagle bits flow well enough unless your looking to do huge things in your build.

[rdrdr90]

What he said except I thought it was 3cfm less than a 6.1.

[Jay6spdRT]

Thanks for the info guys.

Unless Arrington chimes in on Tuesday with some amazing info to the contrary, I think I'll just put the money towards the new VVT cam packages that are now starting to appear out there. I was looking for something fairly easy I could do myself out in the garage - intake mannys are pretty routine - I've done a few of those in years past on Chebbies.

If I did change the heads at some future point, then the intake manifold would be good to do too, because it can be ported/polished to match the heads - an obvious advantage over the plastic stock one, besides appearance.

[HemiSam]

http://www.youtube.com/watch?v=c6si8Xp8P-M

Damn I love that scene...








HemiSam

[Hemi31]

The 6.1 intake will make more power higher up in the powerband than the eagle.....especially when ported. Do a VVT cam you are going to want more intake manifold anyway unless the cam runs out of power under 6k rpm.

[426hemicuda]

Not worth the trouble or $$ for the minimal gains...even if you ported and polished the 6.1 intake...flow wouldn't be anything stellar over the composite intake on the Eagle motors.

[andy23]

From my research also, the more you do the more benificial the intake will become. Like Hemi31 said, if you plan on doing the cam also, the intake will compliment it more than the eagle intake. I plan to do a centrifical SC later on, so the 6.1 intake, along with a cam, will benefit on my combo.

With that said, I would not drop the coin on a new complete kit for that price. I got my intake for $460 shipped with everything except for the throttle body and throttle body bolts. Our throttle body is the same, so don't need to purchase a new throttle body, but I will have to buy some throttle body bolts as they are different. The intake bolts are also different, but mine came with them. I have not installed the intake yet, so I don't have real world numbers. If you can find just a bare intake, I have an extra set of 6.1 injector rails and injectors, and I would make you a good deal on them.

[novawagonmaster]

Some mods work OK by themselves, but some are just pieces to a bigger puzzle.

You have to create a need for that additional airflow before the manifold swap will show a gain.

[ostmike]

Do the VVT cam swap AND the intake. Assuming a decent duration/lift cam the intake will be a required component.

[RobbyD]

The 6.1 intake will make more power higher up in the powerband than the eagle.....especially when ported. Do a VVT cam you are going to want more intake manifold anyway unless the cam runs out of power under 6k rpm.

Erik & I just did this to my 5.7 VVT HEMI. My 6.1 was ported & polished and I noticed a difference. The car pulls to 6,500 RPM

[1FST4DR]

Modern muscle did back to back test with these manifolds. Ill try and find a link here in a few..

[novawagonmaster]

http://www.lxforums....anifold-215403/

Cliff's Notes from above link:

"So what does this mean? For pretty stock 09+ R/T applications the Eagle (manifold) is probably the best bet, but once you start to extensively modify them the 6.1 intake manifold should be used."

[rdrdr90]

Modern muscle did back to back test with these manifolds. Ill try and find a link here in a few..

I have seen that write up, but I think it was on a pre-Eagle motor.

[andy23]

I have seen that write up, but I think it was on a pre-Eagle motor.

It was on a 09 Challenger RT. It was to test the difference between an Eagle manifold and 6.1 manifold on a slightly modified Eagle engine. The gains get larger for the 6.1 manifold the more extensive the mods become.

[rdrdr90]

Here is the article I was referring too..

http://www.moparmusc...es/viewall.html

[andy23]

Here is the article I was referring too..

http://www.moparmusc...es/viewall.html

Different article we are talking about then. I was talking about the one the Novawagonmaster linked.