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Performance Modifications If you plan to modify your Jeep Commander, tell us about it in here.

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post #11 of 18 (permalink) Old 10-23-2019, 05:56 PM
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Quote:
Originally Posted by Wombler View Post
It can....to a point. The over-all answer is not really any different than the answer for the 3.7. There's actually a lot of SC options for the 5.7 since they are very popular in all the Chargers, Challengers and Magnums. Edelbrock makes a real nice low-profile twin-screw kit that might fit under the Commander's hood. Most of their kits for the 5.7 are either for the Ram truck, or any of the cars and while all the engines/blocks/heads are the same, the intake positioning and hood clearance are all different than the Commander's....the Ram intake actually comes off the BACK half of the engine and the cars pipe to the left where our battery is. Also all the engine accessory drives (AC, alternator, etc) and belts/routing is way different. Probably not that bad to retro-fit if it clears the hood and the frame brace. Further NONE of the intercoolers would fit, save MAYBE the GC SRT. However, at $6500 to $7500 depending which year model you have (changed to VVT for 2009).....that's a costly experiment.
Without doing any engine work your weak points are going to be head gaskets and head bolts since they aren't designed for increased pressures....as a result, most of these "bolt-on" kits have a rather low PSI rating. I think the Edelbrocks are only 5 psi. They still claim like 500ish HP at the flywheel or 450ish at the wheels depending on what vehicle the kit is actually designed for.

Your best bet is to look into a centrifugal type like a Pro-Charger....there'll still be a lot of custom fab parts you'll have to do because no one makes a bolt on kit for the Commander. But almost everyone at least makes a kit for the SRT Grand Cherokee and all the Hemi engines are the same on the outside- 5.7, 6.1, 6.4, etc. This would be the same process as a turbocharger almost but WITHOUT all the extra plumbing needed with regards to the exhaust- there is almost NO room down at the headers on our Jeeps. There are rear mounted turbo setups on some cars- like back at the muffler, but all that loss through the long amount of piping just does not seem like it's not worth it.

Lastly- all this intake work is for not if you don't replace the small "log" of an exhaust manifold setup that's stock on the Commanders. That's another $1700.



......but I haven't put much thought into the idea....
I bet you that's upwards of $10,000 by the time it's all said & done......


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post #12 of 18 (permalink) Old 10-23-2019, 06:08 PM
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Join Date: Jan 2019
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Trying to make a Hellcat Commander? While it would be fun, and unique projects are always attention getters at events, I'm more along the lines of improving of what a vehicle is already good at or designed for. The amount of money and effort doesn't seem to match the outcome on this project idea to me. But I'd still give a thumbs up to anyone who does it!


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post #13 of 18 (permalink) Old 10-23-2019, 06:38 PM
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Join Date: Oct 2015
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Originally Posted by Sevenjays View Post
Trying to make a Hellcat Commander? While it would be fun, and unique projects are always attention getters at events, I'm more along the lines of improving of what a vehicle is already good at or designed for. The amount of money and effort doesn't seem to match the outcome on this project idea to me. But I'd still give a thumbs up to anyone who does it!

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Yep, this is definitely off the beaten path for sure....but hey, different strokes.....

Personally, I have other mods I still want to do, that are far cheaper than $10,000 and more in line with what a Jeep Commander was built for.


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Last edited by Big Blue; 10-23-2019 at 06:42 PM.
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post #14 of 18 (permalink) Old 10-24-2019, 02:10 PM
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Quote:
Originally Posted by Big Blue View Post
I bet you that's upwards of $10,000 by the time it's all said & done......
Quote:
Originally Posted by Sevenjays View Post
Trying to make a Hellcat Commander? While it would be fun, and unique projects are always attention getters at events, I'm more along the lines of improving of what a vehicle is already good at or designed for. The amount of money and effort doesn't seem to match the outcome on this project idea to me. But I'd still give a thumbs up to anyone who does it!
hah, for suuuure! If you're going to consider dumping 10k into a custom blower setup for a decent power boost on an engine not quite set up for it so reliability is "meh".... just spend another 5k and literally get a Hellcat...a supercharged Hellcat, that's built for it!! Now you need a new tranny AND a new drive-line! ahhh...it never ends.
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post #15 of 18 (permalink) Old 10-25-2019, 10:28 AM
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Join Date: Jan 2019
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Order a new Grand Cherokee TrackHawk and drive away from everyone except the Shell station. And your 2nd mortgage broker!


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post #16 of 18 (permalink) Old 10-28-2019, 12:35 AM
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Join Date: Jun 2014
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Originally Posted by Sevenjays View Post
Order a new Grand Cherokee TrackHawk and drive away from everyone except the Shell station. And your 2nd mortgage broker!

ha, I forgot alll about that thing...I'd love to drive one. but that's it
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post #17 of 18 (permalink) Old 10-28-2019, 03:43 PM
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Join Date: Aug 2019
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There's a guy on instagram that swapped in an SRT 6.1L into a salvaged 4.7 XK. Obviously the entire drivetrain, etc. was probably replaced too, but still...
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post #18 of 18 (permalink) Old 11-04-2019, 01:10 PM
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Join Date: Jun 2014
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Model year: 2006
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Current Mileage: 113676
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Quote:
Originally Posted by JeepersXKreepers View Post
There's a guy on instagram that swapped in an SRT 6.1L into a salvaged 4.7 XK. Obviously the entire drivetrain, etc. was probably replaced too, but still...

That's awesome...hadn't seen this yet! That thing sounds mean!!
There's been a few people pass through here saying they've done similar (SRT swaps, etc) but never hang around more than their initial posts with some pictures....no discussion or question answering. None that I have seen had a forced induction system, though!
It's all fully possible- the SRT Grands still have the same frame and mounting points as our XKs, so as long as you have access to all the SRT parts, PCM/TCM as well, it'll all transfer over pretty easily. It's just when you start mixing and matching parts that it gets more complicated. The 6.1 block is still the same as the 5.7 block.

I wouldn't mind finding a wrecked SRT and a blown up XK and just move everything over, lol....ahhh 'cause who needs more huge projects??
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