Jeep Commander Forum banner

1 - 20 of 22 Posts

·
Registered
Joined
·
19 Posts
Discussion Starter #1
Hi everyone... This is my first post onto this forum and I am now the proud owner of a 08 Jeep Commander Sport. Wanted a jeep for a long time and finally returned enough cans to get one.

I have been reading through the forums on different topics about performance parts for commander and I have also been looking in some online stores as well...

There seems to be some decent products out there for chips, exhausts and intakes but nothing for the engine itself. I did read that a gentleman had put short headers for a Liberty in his 07 but I was unsure of it they would work for an 08.

Also is there a preferred chip to others?

On top of that question is there anything else besides shorties, intake, exhaust and a performance chip that can put into the engine...?

Thank you for all your help ahead of time

Nate
 

·
Registered
Joined
·
19 Posts
Discussion Starter #2
okay heres something that may help but might contradict itself... Im looking for performance parts that will help alittle in the mud but also help me **** and get if i need to? Is this even possible, to increase your low end and also your high end?
 

·
Registered
Joined
·
19 Posts
Discussion Starter #3
okay i can see i have answered my questions myself... thanks for all the help........-_-


igf a mod can delete this post that would be greatly appreciated
 

·
Registered
Joined
·
1,585 Posts
No need to delete the post.

This forum can get a little slow...


So what did you come up with?

Intakes generally are stated not to increase power noticably, but exhaust can make a difference?

I just snagged a hypertech max energy on ebay for real cheap. Updated a few minutes ago and getting ready to load up the tune on the commander today.

Supposed to make +24 hp&torque and +2mpg improvement.

We shall see...

Gears would likely help this little thing out tremendously. The 3.05 are anemic as all heck. 3.73's from a 4.7l would be a good upgrade I think.


Many 3.8l guys are running 4.7l throttle bodies (the 3.8l use the same TB as the 3.7l) and note a performance improvement. This has been documented to work on 3.7l's as well. It is often called "viper TB" swap as the vipers run dual 4.7l TB's.
 

·
Registered
Joined
·
19 Posts
Discussion Starter #5
Well through my reading on the other posts on here and through other websites I have come up with.

K&N Intake System
Catback Exhaust System
The hypertech max energy chip*** never chipped anything but have heard they are user friendly. dont know anyone with a dyno :(

Would also like to put shortie headers but need to have the company contact me back about my questions regarding my engine.

Now that you have given me that information on the throttle body i might go with the larger one but would like to know more details... I want to put a throttle body on it but now my only concern is that if I run a 4.7 tb on a 3.7 engine what complications would I possibly have and would this all be fixed by the chip.

I want to gear to 3.73's and with knowing how to do the work I feel I wouldn't be dropping the now 2.5 almost 3k on shop work to do it but knowing I will need a master overhaul kit so working on it myself is my only option...

Im also going to be painting the calipers red for a total added hp gain of 20hp and from what everyone says basic stickers giver you a 5 hp gain while 4x4 stickers give you a 8+hp gain for bore/stroke.

Other than all of this I'm exploring into other vehicle engine performance upgrades to see if specifications will match up to my 3.7 V6. If they do then more research and questions must be asked regarding weither or not I can chip them into place
 

·
Registered
Joined
·
554 Posts
I have the K&N cai and had to put the k&n dry charger over the filter. It was allowing water into the engine. After you take the stock box and inlet tube away, the front end, filter, is wide open to the elements, not to mentiopn the whole underneath is exposed. It may be a better option to use the k&n insert filter. and a lot cheaper. The gains are minimal for a $380 piece.
 

·
Registered
Joined
·
19 Posts
Discussion Starter #7
ahh good point... I wont be seeing some extreme mud but we get tons of snow... we got 152" this year so elements are something we deal with alot... What does everyone think about a turbo??? I think i can come up with one from the local junk yard.
 

·
Registered
Joined
·
1,585 Posts
ahh good point... I wont be seeing some extreme mud but we get tons of snow... we got 152" this year so elements are something we deal with alot... What does everyone think about a turbo??? I think i can come up with one from the local junk yard.
Regarding a turbo:

I'm not aware of anyone on this forum running a turbo, let alone on the 3.7l.

Look @ squires turbo systems and design something similar would probably be the easiest way to go about it.

Your going to need to find a way to tune for the turbo.

You will need a custom tune and dyno time to really make it work as a daily driver most likely.
 

·
Registered
Joined
·
1,585 Posts
Well through my reading on the other posts on here and through other websites I have come up with.

K&N Intake System
Catback Exhaust System
The hypertech max energy chip*** never chipped anything but have heard they are user friendly. dont know anyone with a dyno :(

Would also like to put shortie headers but need to have the company contact me back about my questions regarding my engine.

Now that you have given me that information on the throttle body i might go with the larger one but would like to know more details... I want to put a throttle body on it but now my only concern is that if I run a 4.7 tb on a 3.7 engine what complications would I possibly have and would this all be fixed by the chip.

I want to gear to 3.73's and with knowing how to do the work I feel I wouldn't be dropping the now 2.5 almost 3k on shop work to do it but knowing I will need a master overhaul kit so working on it myself is my only option...

Im also going to be painting the calipers red for a total added hp gain of 20hp and from what everyone says basic stickers giver you a 5 hp gain while 4x4 stickers give you a 8+hp gain for bore/stroke.

Other than all of this I'm exploring into other vehicle engine performance upgrades to see if specifications will match up to my 3.7 V6. If they do then more research and questions must be asked regarding weither or not I can chip them into place
The JBA headers for the Liberty work in this vehicle:

http://www.ebay.com/itm/JBA-Headers-Headers-Cat4ward-Stainless-Steel-Natural-Jeep-Liberty-3-7L-Pair-/331258215099?pt=Motors_Car_Truck_Parts_Accessories&hash=item4d20873abb&vxp=mtr

I just installed the Hypertech and posted about it in this thread
http://www.jeepcommander.com/forums/showthread.php?t=16399&page=5

the 4.7l jeeps came with 3.73's and you would likely have an easier time swapping in the differentials than installing gears yourself.
 

·
Registered
Joined
·
392 Posts
Many 3.8l guys are running 4.7l throttle bodies (the 3.8l use the same TB as the 3.7l) and note a performance improvement. This has been documented to work on 3.7l's as well. It is often called "viper TB" swap as the vipers run dual 4.7l TB's.
Wait... so you're saying I can get a TB from a 4.7 and it'll fit my 3.7?!? Where was I when this info came out?
 

·
Registered
Joined
·
19 Posts
Discussion Starter #12
Well idk if it will but im looking at different specifications from even other vehicles and have been for the past week, obsessively, i might add. lol havent been able to find any keepers yet but im sure there are some out there.... Im sure if i find one that doesnt bolt on perfectly ill just build some piping. I am also curious to see if anything from a 4.7 might fit into a 3.7 cause if thats the case im going to start calling junk yards.... The one thing i have noticed is that the 2008 were built differently and have alot less mods for them then 07 and under... I may be mistaken but i havent had much luck finding alot of mods
 

·
Registered
Joined
·
7 Posts
Cheap mods to increase power / mileage would be putting in a 180* or 160* thermostat. (I would do the 180*)
Oil change with a full synthetic. (5w-30)
Labor intensive, but cheap, pull the heads and port them. Also, have the 3-angle valve job and mill the heads for higher compression. (Not sure if thinner head gaskets are available for these motors or not)

Free mod - get rid of unnecessary weight. (spare, rear seats...)

Smaller diameter tires will increase the gear ratio. (Programmer needed to adj. tire size):eek:rder:
 

·
Registered
Joined
·
19 Posts
Discussion Starter #15
I heard the cheapest mod were dollar store stickers... they dont add the MAD HP like a mopar sticker would but if you put enough of them on your window then you could come some what close.... I also found

http://www.hypertech-inc.com/performance-gains.aspx

I would probly just go with the Econ since at the price of premium the extra 1hp+ gain doesnt seem worth it but I were to ever run a turb then i suppose this one would be the way to go. Any thoughts?
 

·
Registered
Joined
·
1,585 Posts
I just purchased and loaded the hypertech max energy tune.

The max energy allows for tire and gear ratio correction

It would be bad for a turbocharged vehicle however
 

·
Registered
Joined
·
1,585 Posts
Cheap mods to increase power / mileage would be putting in a 180* or 160* thermostat. (I would do the 180*)
Oil change with a full synthetic. (5w-30)
*snip*

Why do you think a lower thermostat would increase power and mileage?


I'm running full synthetic 5w20 and a hypertech max energy tune and iridium plugs. I'm seeing ~18mpg mixed driving now.
 

·
Registered
Joined
·
19 Posts
Discussion Starter #19
Got ahold of a buddy of mine last night and he said a turbo would be out of the question unless you put aftermarket pistons in... Guess there are only the basics. Of course it is only a v6
 
1 - 20 of 22 Posts
Top