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Old 12-26-2010, 01:16 AM   #1
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New Jeep Owner (Clueless, please help)

Hey guys, I'm new to the board. Just bought a 1999 Jeep Wrangler SE last Monday and I love it. The problem is, I'm not really sure what I have. It's got 75k on the motor and is definitely lifted (4" I think) with 35" Goodyear MT/R tires. The suspension looks complicated (lmao, I told you I was clueless). I have a major concern here. I'm worried that my 4 banger doesn't have enough power to turn those 35" meats and I'm going to burn it up. How do I tell what I have and what I need. I can post pictures, just tell me where to point the camera. After researching, I am thinking if doing a few mods to help out with power such as cold air intake (good brands??), a more free flowing exhaust that doesn't sound like I put a card in my bike spokes (good brands???), possibly a 4.0 throttle body (seems popular). Do you guys have anything you can tell me. All answers appreciated! Thanks for reading and have a good one!

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Old 12-26-2010, 01:38 AM   #2
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Now that's scary 35s on a 2.5 just curious what rpm are you running in over drive?cold air intakes are useless unless you have some sort of forced induction(turbo or super charger).I'm not so sure about the throttle body maybe someone else can chime in.

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Old 12-26-2010, 01:39 AM   #3
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Now that's scary 35s on a 2.5 just curious what rpm are you running in over drive?cold air intakes are useless unless you have some sort of forced induction(turbo or super charger).I'm not so sure about the throttle body maybe someone else can chime in.
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Old 12-26-2010, 01:40 AM   #4
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Old 12-26-2010, 01:41 AM   #5
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If you have a 2.5L the best thing you can do to try to restore some power is regear. I'm not the best at explaining it so I'll let someone else take the leasd on that....
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Old 12-26-2010, 03:50 AM   #6
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I usually stay under 3k rpm's, 5th gear is useless at this point. Had it up to 65 mph the other day(can't remember the rpm), that's about all I'm willing to ask from her at this point.
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Old 12-26-2010, 04:14 AM   #7
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Did you buy from a personal seller or dealer? If it's a personal seller ask them if they regeard it.. Likely they did.. If it was a dealer then it is highly likely that they are clueless but still worth asking anyways.. Re gearing is the best way to bring it back up to speed.. But if that is already done and its the right gearing for those tires.. I.E 456 or 488's.. Then what else can you do to get more out of it.. There isn't much that I can think of..
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Old 12-26-2010, 05:26 AM   #8
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Take those 35s off and put on 33s. 4" of lift and 33s will look better anyway. Your jeep is really hating you right now lol.
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Old 12-26-2010, 06:07 AM   #9
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What he said. You are never going to be satisfied with those 35s no matter what you do. Gears or no gears. I'd drop down to a light 33" tire (you can view tire specs on tire racks website) and regear to 4.88s since you have a 4 banger 5 speed.

A cold air kit and exhaust is only going to lighten your wallet. It's not like that 4 cylinder is some beast of a motor that just needs to be uncorked!
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Old 12-26-2010, 08:51 AM   #10
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Yeah they nailed it Regear and go down a notch on the tires
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Old 12-26-2010, 09:44 AM   #11
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If you spent the money to get every available horse from that engine, it would still be straining it to the limit. Follow the advice of the forum and save your money for a complete drive train swap. Think V8...
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Old 12-26-2010, 11:54 AM   #12
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Well I'm not looking to run any 10 second quarters, I'm just looking for a little better gas mileage and a little more efficiency. How much do new gears cost? Are you guys sure it would still look okay with 33's? I don't want to look like a skateboarded my wheels lol. Thanks again guys!
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Old 12-26-2010, 01:15 PM   #13
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If your looking for better gas mileage then smaller tires will do that .
Deep gears = bad gas mileage
Big tires = bad gas milage
33's will look good and give you alittle better miles
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Old 12-26-2010, 01:21 PM   #14
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A great idea, to save money, is sell the 35s. If you do that, new tires won't sting to bad.
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Old 12-26-2010, 04:45 PM   #15
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Well I'm not really sure there is enough tread to sell them. How deep should my tread be? The spare on the back is WAYYYY deeper (obviously).
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Old 12-26-2010, 04:48 PM   #16
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Forget the v8 go with a 4 bt cummins!
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Old 12-26-2010, 06:19 PM   #17
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Well I'm not really sure there is enough tread to sell them. How deep should my tread be? The spare on the back is WAYYYY deeper (obviously).
3/32 of an inch is generally "end-of-life" for a tire.
Stick a penny in the tread- if you can see the top of Lincoln's head, they're pretty used up.
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Old 12-26-2010, 06:23 PM   #18
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Take those 35s off and put on 33s. 4" of lift and 33s will look better anyway. Your jeep is really hating you right now lol.
exactly what i was going to say
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Old 12-26-2010, 06:34 PM   #19
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Drop in a 4.0
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Old 12-26-2010, 06:50 PM   #20
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Old 12-28-2010, 02:19 PM   #21
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Old 12-28-2010, 02:59 PM   #22
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I have 33s on my 4 banger 6 speed. Looks great and I get 18 to 19 mpg. And I have no issue keeping up with traffic. Just need to get 33s and learn how to drive her
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Old 12-28-2010, 06:00 PM   #23
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So should I buy an intake (if so which brand is known to be good) or just go with a K&N filter and put the sock on it when I'm on the trails. I also need a new exhaust (mine is completely rusted), but most people on here seem to think the stock system is sufficient. I am going tomorrow to have a system put on for $140 (from the manifold). Is this a good idea or should I get something aftermarket? Thanks again guys, I'm learning slowly! Couldn't do it without all your help and suggestions.
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Old 12-28-2010, 08:38 PM   #24
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33's will look better on that Jeep. I can't imagine its ever been off-roaded in that condition or those front fender flares would be telling a sad tale
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Old 12-28-2010, 08:47 PM   #25
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Drop in a 4.0
forget the 4.0, drop in a 4bt cummins!.. but at this point i would take either
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Old 12-28-2010, 08:51 PM   #26
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I believe the factory y-pipe is stainless, don't let some shop trash it and build you one. Replacing the exhaust is a waste of money unless it's rusted with holes. Even the stock muffler has a nice rumble to it, so an aftermarket muffler is not worth it. I can tell you from experience that you will not gain anything from an exhaust system on a TJ. Save that money and use it elsewhere
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Old 12-30-2010, 03:16 PM   #27
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Ok, I went to the best muffler shop in town today. They told me that my exhaust if perfectly fine and that a little rust isn't hurting anything. They did, however, deal me a bit of bad news. I have a cracked manifold and it needs to be replaced. Well, thank goodness for my 30 day warranty from the dealer. It would have cost me right around $530. My question now is, how much power was I losing with a bad vacuum in my exhaust?
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Old 12-30-2010, 03:32 PM   #28
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Your little engine was NEVER made to handle big big tires. 33s will be a strain for that engine. The ONLY option that can take care of what you are asking of your Jeep is re-gearing. If it is your intake manifold that's cracked you would be having more issues...if it's your exhaust manifold you are probably not losing any noticeable power. Save your money and time until you can get it regeared.
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Old 12-30-2010, 07:50 PM   #29
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I don't really have the money for that right now. I'm in grad school. I'm just trying to do all I can with a budget that doesn't have $1000 upgrades included.
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Old 01-05-2011, 03:07 AM   #30
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So the manifold is fixed and I added a new air filter and I'm getting much better gas mileage, much less noise, and more pick up. I think I have decided to stay with my 2.5 and downgrade to 33's when I need to change tires. I'm not going to mess with gears now because I'll ride the motor until it dies and then go GM V8. Here are some photos of the front suspension, I have no clue what all this shit is, so feel free to chime in. Also there is a picture of what looks like some type of hydrolic, is this for a winch? Thanks again as always peoples!


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