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Topic Review (Newest First)
07-23-2012 11:09 PM
pkmcd99
Quote:
Originally Posted by Ltblue
Are there mods that could increase the horse power or torque of a JK? Did any of you made any changes or add anything to yours? example Chip, muffler, intake, etc?
Buy a tapout or fear this sticker. I hear they add 30hp
07-23-2012 11:07 PM
mfaas88
Quote:
Originally Posted by bloodfart
stripes and stickers will give you the best bang for the buck if you want more horse power
Bahahaha
07-23-2012 09:57 PM
bloodfart stripes and stickers will give you the best bang for the buck if you want more horse power
07-23-2012 07:55 PM
mfaas88 I have a ,12 2dr 6sp manual with the 3.6L, which is my daily driver.

Running stock 32s on 2.5" lift I average 18.5mpg.

Coming spring time (tax return) I thinking new bumpers, winch, 35" Dick cepek crushers, and new gears. Original thought was 4.10 gears, now thinking of 4.56 gears.

Thoughts?
07-23-2012 07:50 PM
mfaas88 Paint the muffler on my '12 2dr black, only notice it when there's dirt on it....so....all the time. Lol
04-02-2012 01:37 PM
Ltblue
Quote:
Originally Posted by Philster View Post
Horsepower, cheap? I don't think so!
Cheap as in mods I could afford.. Never said horsepower was cheap. Phil you high?
04-01-2012 01:54 PM
FreezerJeep No cheap way to gain power. But you can remove everything u don't need. Seats, stereo, a/c, top, doors, etc...

But if it's a dd, that wouldn't work to well.

Bryce
04-01-2012 01:29 PM
MTH
Quote:
Originally Posted by hwy1rubi

I'm thinking of putting a Magnaflow on my 12, knowing I will not pick up more than 10 HP, but for me that is only a small part of the reason, the other is to get rid of that monster of a muffler on my Rubi.
Quote:
Originally Posted by Ltblue

Dude, I'm with you on that one. Everytime I look at the back of my Jeep, I always see that hideous tank called the muffler..but instead of Magnaflow; I was gonna get the Flowmaster 40 delta flow kit. the muffler itself is small and compact, best of all out of sight.
Quote:
Originally Posted by hwy1rubi

Agreed anything is better
Rustoleum black high heat paint. Or grill paint. Either way, just clean up that silver monstrosity, scrape it up with a wire brush, and hit it with the paint. POOF--it's black and you hardly notice it. Touch it up every few months if it flakes.
04-01-2012 12:55 PM
Philster
Quote:
Originally Posted by Ltblue View Post
I mean "cheap" mods lol..

Horsepower, cheap? I don't think so!
04-01-2012 12:10 PM
JIMBOX Getta Flowmaster 40 -cat-back, makes the sound "SWEEEET", with duals-





I don't know how much SIZE changes they may have made, but if not--the FM 40 fits right in front of the EVAP can !

JIMBO
04-01-2012 12:04 PM
hwy1rubi
Quote:
Originally Posted by Ltblue View Post
Dude, I'm with you on that one. Everytime I look at the back of my Jeep, I always see that hideous tank called the muffler..but instead of Magnaflow; I was gonna get the Flowmaster 40 delta flow kit. the muffler itself is small and compact, best of all out of sight.
Agreed anything is better
03-31-2012 09:44 PM
JIMBOX MOPE, T-Case will be happy asa clam--


Quote:
Originally Posted by northernjeeper View Post
Thanks JIMBO, does anything have to be done with transfer case? Does it work better or worse in off road applications? Heard installed around $1,500 as im not very mechanically inclined. I'm saving for the 5.13's now.
You will feel like you have a NEW jeep and much better 4hi off-road-

If you have an aux cooler installed, you can stay in 4hi a lot longer than you do now !

It's a brave new world--

JIMBO
03-31-2012 09:37 PM
northernjeeper
Quote:
Originally Posted by JIMBOX
No Problemo--you've got O/D and you'll be able to useit-

Probably about 2400 rpm (5.13),at 7mph and you'll be getting better mileage-

JIMBO
Thanks JIMBO, does anything have to be done with transfer case? Does it work better or worse in off road applications? Heard installed around $1,500 as im not very mechanically inclined. I'm saving for the 5.13's now.
03-31-2012 09:07 PM
JIMBOX No Problemo--you've got O/D and you'll be able to useit-


Quote:
Originally Posted by northernjeeper View Post
Thanks, how'd that be on the hwy? High revs?
Probably about 2400 rpm (5.13),at 7mph and you'll be getting better mileage-

JIMBO
03-31-2012 08:50 PM
northernjeeper Thanks, how'd that be on the hwy? High revs?
03-31-2012 08:50 PM
Ltblue
Quote:
Originally Posted by hwy1rubi View Post
I'm thinking of putting a Magnaflow on my 12, knowing I will not pick up more than 10 HP, but for me that is only a small part of the reason, the other is to get rid of that monster of a muffler on my Rubi.
Dude, I'm with you on that one. Everytime I look at the back of my Jeep, I always see that hideous tank called the muffler..but instead of Magnaflow; I was gonna get the Flowmaster 40 delta flow kit. the muffler itself is small and compact, best of all out of sight.
03-31-2012 08:41 PM
JIMBOX You should regear to 4.88 MINIMUM or 5.13-


Quote:
Originally Posted by northernjeeper View Post
Oh ya, it's an auto.
Either one is good, but 5.13s better !!

Good luck

JIMBO
03-31-2012 08:38 PM
northernjeeper
Quote:
Originally Posted by northernjeeper
What about a 2011 with 33's and 2 inch lift, looking for better mpg's but more importantly power, 4.88's or 4.10's or 4.56's? Do quite alot of highway driving.
Oh ya, it's an auto.
03-31-2012 08:36 PM
northernjeeper What about a 2011 with 33's and 2 inch lift, looking for better mpg's but more importantly power, 4.88's or 4.10's or 4.56's? Do quite alot of highway driving.
03-31-2012 07:59 PM
hwy1rubi
Quote:
Originally Posted by kik View Post
Other than re-gearing, leave it alone. I did a dual cat back exhaust knowing that there was no increase in anything, but I like dual exhaust. I have 4.10's and I think it's a good way to go.
I'm thinking of putting a Magnaflow on my 12, knowing I will not pick up more than 10 HP, but for me that is only a small part of the reason, the other is to get rid of that monster of a muffler on my Rubi.
03-26-2012 05:37 PM
kbwwolf I've generally been avoiding gearing threads of late, but I will say this:

Dave @ AEV wrote awhile back that he thinks 4.10 gears are perfect for a '12 on 35" tires. I agree with this, to a point. If you live somewhere flat, like FL or NE, you should be fine. If you drive in mountains, you won't be.

Most peeps, when they think of gearing, are concerned solely with power gain. But mileage should be considered, as well. If you do it right, both will benefit. But it's a very fine line.

Choosing the right gear ratio for your Jeep takes a lot of research.

Some good general info in this thread: Want 35s dont want to REGEAR ??
03-26-2012 05:34 PM
Ltblue
Quote:
Originally Posted by kik View Post
Other than re-gearing, leave it alone. I did a dual cat back exhaust knowing that there was no increase in anything, but I like dual exhaust. I have 4.10's and I think it's a good way to go.
haha I know what you mean, I had a old 95 GC and I put a Flowmaster on it, just because I like the sound. Here is a video of my old but not forgotten ride

Jeep Grand Cherokee Flowmaster 40 Delta Flow - YouTube
03-26-2012 05:34 PM
MTH
Quote:
Originally Posted by Ltblue View Post
What are the cons of regear? will it damage anything?
Higher RPMs.

It just runs the engine harder. My guess would be that over time in probably shortens the engine lifespan--after all, you're putting in more rotations per mile than you would have otherwise--but I have no evidence to back that up.

There's no free lunch.
03-26-2012 05:28 PM
Ltblue
Quote:
Originally Posted by kbwwolf View Post
I wouldn't expect anyone to have one soon. Since Chrysler went to the rolling codes in '11, peeps have been waiting. And they're all still waiting.

Gearing really is your only option.
Quote:
Originally Posted by MTH
Take a look at a 2012 regearing chart next to a 3.6 engine dyno and look at what happens as the RPMs go up. Like Jimbo indicated, you're going to see a big boost in applied power as you turn more RPMs. I don't know that I'd go through the expense just for 4.10s, but I'd imagine 4.56s or so would give that jeep a heck of a lot of pull. Of course, you'll be spinning much higher RPMs than you're used to. And Ripp is looking to put out a supercharger that should provide some fairly stunning increases in power.

What are the cons of regear? will it damage anything?
03-26-2012 05:26 PM
kbwwolf
Quote:
Originally Posted by MTH View Post

Hahahaha...gotcha.
03-26-2012 05:25 PM
kbwwolf My advice for gearing a '12 is this. For a manual with 35" tires, go 4.56. It's not a conventional size, and Yukon doesn't make gears in that size, but 4.56 will give you the best combination of usable powerband and mpg, IMO.

For an auto of the same configuration, 4.88.
03-26-2012 05:25 PM
MTH
Quote:
Originally Posted by kbwwolf View Post
Is that Bruce Lee?

As he seems to be indicating, your post went over my head.
My Brain is Full of F**k | Know Your Meme
03-26-2012 05:24 PM
kjeeper10
Quote:
Originally Posted by kbwwolf

Is that Bruce Lee?

As he seems to be indicating, your post went over my head.
He's scratching

Mike -is that druff I see ?
03-26-2012 05:23 PM
kik
Quote:
Originally Posted by Ltblue View Post
Do you feel a big difference let's say 3.21 to 4.10?
Other than re-gearing, leave it alone. I did a dual cat back exhaust knowing that there was no increase in anything, but I like dual exhaust. I have 4.10's and I think it's a good way to go.
03-26-2012 05:23 PM
kbwwolf
Quote:
Originally Posted by MTH View Post
Is that Bruce Lee?

As he seems to be indicating, your post went over my head.
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