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Update on MOPAR CAI for V6 Pentastar

8.7K views 23 replies 10 participants last post by  padgett  
#1 ·
Any one know if the Mopar CAI for the V6 Pentastar is available yet or when it might be? I called Mopar Performance Online this week and they did not have any updates. The guy did not sound very optimistic of is being ready any time soon. They have on the site ETA of 4/15 but I think that is an old date now.
 
#5 ·
Being more of a DIY person, I can get a pipe bent to match the "hose" but have a difugledy: the IAT sensor seems to be glued to the "hose" rather than being replaceable. Anyone know of a screw-in sensor with the same value and connector ? (suspect just an OTS thermister).

Am not interested in HP just really do not like seeing 120-140F IATs. Does take a soak so probably does not occur during the EPA cycles. Also live in a hot climate so do not need any manifold heat (is really unnecessary with FI anyway).

Quick look says the air filter and intake snorkel is sized for the hemi so "enough" for 3.6 & just getting rid of all of those odd chambers that seem positioned to soak up heat. In fact really going to be heretical and say 2" is probably enough anyway but first experiment is going with 2.5" and I'll check the IMAP against my baseline to see if it changes (was about 1/2" BP at 6300 rpm).

Four feet from the filter to the Throttle Body is a long way but first I need to source an IAT sensor I can add. Anyone have a part number ?
 
#6 ·
The standard air intake is already a CAI. It takes cold in-rushing air from the gap between the hood and the grill. In fact it is better than the Mopar CAI that takes air from the engine bay.
 
#8 ·
I would assume the AFE is similar to my Airaid where there is a sealed box to keep the underhood heat out of the intake. My airaid also uses the same scoops the oem intake uses.
 
#14 ·
#12 ·
AFE seem to have done a good job in isolating the engine bay air. If Mopar have done the same, I may have maligned them unfairly but still, the only benefit over stock that I can see is the sound.
 
#16 · (Edited)
Am seeing quite high IAT on mine (over 120F on 80F day) but then the "hose" has gotten quite complicated over what Allpar showed for the 2011:

Image

2011 Intake from pentastrs web site.​

In counterpoint, my 2012 seems to have acquired several "chambers" right in hot air areas.

Image

2012 Pentastar​

Will begin by using a plain 3" tube from air cleaner to throttle body without the furnaces and will see if any difference. For stage 2 I may wrap the tube with exhaust tape.

My opinion is that 3" may be overkill for a 222 cid 6 but the TB is 74 mm ( 2.9") so will use that & monitor IMAP.

Do think the stock air cleaner and snorkle is adequate (same used for Hemi) so will see what just replacing the hose does.

Will mention that just replacing parts without recording IMAP and IAT values before and after will not tell you much.
 
#19 ·
Just some quick noodling (and boring math in Excel) but if the IAT could be reduced by 60F (from 150F to 90F) then you would see about a 9% increase in compressed air density in the chamber and a concurrent increase in fuel trim (richer) to compensate.

More likely would be a 20F drop from 120 to 100 & a 3% change. That plus a 15F reduction in coolant temp might give a 5% increase in charge density. I would not expect any more.

Things to monitor before and after are IAT, coolant temp, IMAP, short and long term fuel trim, throttle position, and load values for steady state. Really would need a dyno for accuracy but all are available on the OBD-II feed (all that is needed is a notebook/netbook/laptop and a $30 thingie from Amazon).

The HEMI CAI thread has a lot of good info but for me, I want to know the IAT as close to the throttle body as possible.
 
#21 ·
I saw 180F IAT reading after a hot soak but came down to about 125F on the road.

Have got a pilot assembled but when spread to avoid the cam cover bulge, the top cover (with 3.6 VVT) does not fit. Stock "hose" has a major dent there to provide clearance. Not an issue since is just for testing.

Has anyone ever seen a smooth "hose" like the one in ithe Allpar 2009 photo ? Idf so does it have the furnace by the throttle body (cannot tell from photo).
 
#24 · (Edited)
You need an OBD-II reader. At the moment I am using a 7" tablet mounted under the a/c control but this picture gives you an idea what can be displayed.

My IAT normally runs between 20F and 40F above the ambient air temperature and the computer is all in by 100F so that is where I want to lock it on a 90+F day.

Image