AEM Brute Force Intake and TBS for a 2.5l?

[jugghead23]

Any idea why the AEM Brute Force Intake system comes with a TBS for the 4.0l version but not for the 2.5l version?

I want to add a cold air intake system to my 2.5l TJ but I also want to add a TBS. Just trying to figure out if there is a reason why there is no TBS with that version...like is there a reason I should not use the AEM Brute Force in combo with a TBS on a 2.5l.

And since I'm at it, is the Akimoto Funnel Ram Intake system offered through quadratec essentially the same idea?

This is probably related, but when also shopping for a TBS, the poweraid spacer for 91-02 4cyl Wranglers says "Will not work on 1997+ Wrangler with Funnel Ram Intake System."?

Can someone shed some light on this subject...as the owner of a 2.5l TJ do I have my choice between either a TBS or an intake system, if so, which is better for that itty bit of power increase I stand to gain?

Thanks

 

[jugghead23]

just found this on AEM's site...probably the case? dunno...still looking for answers

http://www.aempower.com/truck/faq.asp?fid=16&sid=&tid=1

 

[bryanjeep]

Window Tinting...

I would stay away from "cold air" intakes on Jeeps. They aren't worth it. They can really harm your motor offroading. And it really doesn't take in "cooler air" There is a lot of hit sitting around in that hood of your's. They really will not help you. Just put a K&N in the airbox and you will be safe and actually gain a few horses. With the "cold air", you will actually not see an increase, maybe a decrease.

 

[Annihlator95]

while we're on the topic of air intakes, would anyone know how much a good snorkel intake would cost???

 

[laneiac]

ARB makes one thats about 225. Very good kit, but only worthwhile if you plan on waterproofing everything from electrical components to drivetrain components.

 

[Snitty]

get a 4.0 throttle body and use the 4.0 spacer

 

[jugghead23]

Hey BryanJeep, thanks for the advice..sounds like a good idea.
There should be no problem with me using a drop-in filter with a Poweraid TBS though right?

I don't think so, but it never hurts to ask.

 

[bryanjeep]

Oh no not at all, sounds good to me and I am sure a lot of the guys here will agree too. You will be glad you did it.

 

[Junkpile]

There's not much power increase if any in a TB spacer on a factory 2.5, and then only in the upper rpm range. Spend your time elsewhere. I might be wrong but I don't understand all those companies making spacers with those little grooves and swirls in them. Those little swirls aid in atomization in a wet flow system, but the fuel enters the equation further down the line in a Jeeps fuel injection system. I can't see much advantage in swirling the incoming air right before it slams into the flat intake floor and enters that log type intake where it has to make yet another turn. The same is true for using the factory plumbing going to the throttle body. The filter housing slows the flow of air and adds lots of turbulance. A larger tube with less bends and a superior flowing conical filter mounted on the end is your best bet for power. A shield can be added beneath it to prevent it from getting clogged by stuff splashing up on it. You can make a cold air intake that directs cooler air towards the filter and enters through the inner fender. Since it only directs the cold air towards the cone filter and doesn't actually attach to it, it won't have engine vacuum sucking water into it every time it gets submerged. I know snorkles have a place and I totally agree that they are insurance if you take your Jeep swimming very often, but the majority of them are major flow restrictions. The best snorkle system would be one where the filter remained under the hood and the exterior plumbing could be removed when you don't need it.

 

[Snitty]

careful with the term "cold air intake"..... a cold air intake, or cool air intake has the filter OUTSIDE of the engine bay.... i'm sick of seing ricers put a cone under their hood and thinking they have a cold air intake, when they are bringing in warmer air then they would with a stock setup

 

[Junkpile]

It means you are drawing in colder air, it has nothing to do with where the filter is located. Look back at the ram air setups that Detroit was producing in the sixties, they all had the filters under the hood. Cowl induction is also a cold air intake setup with the filter under the hood.
Granted, just having a cone filter isn't a cold air or ram air setup, but when you direct outside air into the engine compartment where the cone can draw it in, then you have a cold air intake.

 

[bryanjeep]

I still dont see why anyone would want to have an open element filter on an offroad vehicle. You would be better off with the stock air filter which is out of harms way.

 

[jugghead23]

c'mon guys, bottom-line it for me.

I have a stock 2.5l and will take ANY boost in power if only marginal.
I am not going to be doing much off-roading except for the occasional trip on the beach or through the snow so I don't know if the open filter element is that big of a deal for me.

Are you guys saying that after all I've read about little gains here or there using a TBS or intake kit, that was all BS and there is no gain to be had?

(by the way, selling and buying a 4.0l is not an option before someone suggests that as a solution)

 

[bryanjeep]

Trust me, I have spent the fast 2 years trying to figure out anyway to make my daily driving 2.5L better. Sorry, but there honestly isn't anything you can do to get a significant amount of power out of these motors. They just aren't powerful.

It wouldn't be worth buying a throttle spacer on the 2.5. It would be a waste of money. And the whole air intake thing... it would be a better investment to get a drop in K&N. You will see better results. It would pull in more cooler air than some open element would.

It really stinks that our motors can't push out power, but that is what we get for getting the 4 cylinder.

 

[jeepdude832]

I was wondering why I didnt notice any difference when I put in my tornado fuel saver. Thanks junkpile for clearing that one up

 

[Snitty]

i agree that a ram/cowl setup is a cool air setup... but still.. most people who claim to have a "cold air" setup is still drawin warm engine air

 

[jps4jeep]

OK I have read it all and here is my $.02 The only true cold air intake that I know for YJ's and TJ's are the K&N model and the AEM model. They seal themselves from some of the motors air with those funky looking boxes around the filter. a conical filter will infact allow a greater volumn of air into the intake (notice I did not say More Air) The amount of air is very pointless to discuss cause it is the volumn and density that we are interested in. Colder the air is, the denser it is, more O2 in the air (air is a mixture of a lot of gasses primarily O2 and CO2) the greater the combustion in the chaimber due to the greater quantity of O2, More power. Now when you do not have a true cold air intake, but instead a air tube, it does not have the ribbing that the factory plastic unit does. This ribbed design is made to silence the air as it goes through the intake system, unfortunatly it also slows down the air speed, meaning less volumn. When a conical filter and a air tube are installed, a greater volumn of air at a greater velocity can enter the combustion chaimber, again more power. But you get the whistle sound everytime the gas is hit. Sounds like a turbo spooling down.

The whole Idea behind the TB spacer is that it allows a greater space for air to mix with the fuel, But Multipoint Fuel Injection simialr to that on Later YJ's and TJ's, they are somewhat useless. This only works with throttle body injection or with a carborator. But if that spacer has the ribbing design, it causes the air to (And I use this term loosely) "Swirl" Increasing the velocity of the air. This would be a power increase on a MFI engines.

I have both of these on my YJ. A home made intake tube, K&n filter and a AIRAID spacer, each was installed in steps, and there was a definate increase in throttle respones and a increase of power felt. though it is not the same as adding a super charger, it was there. I have also reaped the benefits of these off road. Anyone who has wheeled with me, And there are a lot on this board, know I go through a lot of deep water and mud. I have never had water in my intake. the filter gets all filthy, but the beauty of a K&N is that it is cleanable.

Here is a picture of my engine

OH ya, I know the master cylinder is uncovered, I took this while working on the engine (bleeding brakes to be more percise)

Let the critics begin!

 

[TwistedCU]

Are you guys saying that after all I've read about little gains here or there using a TBS or intake kit, that was all BS and there is no gain to be had?

I too have contemplated minor mods to get a little bit more oomph out of the little iron duke. I didn't know which one to do, so I have done alot of them.

Removed the airflow restrictor, K&N drop-in filter, electric fan conversion, splitfire plugs (don't laugh, I'll try anything), and I even gutted my catalytic coverter. I'm going to do the swirly throttle body thing too.

To answer your question, yes they make a difference. The elec fan probably the most. With all of these mods, I'm pretty happy with the way my Jeep performs. It is no powerhouse by any means, but I hear everybody talkin' about losing 5th gear when putting bigger tires on a 4cyl, but I drive my lil 2.5L up and down hills in 5th gear every day. Keep in mind that on long big hills, like when I go out to western MD, I still need to hit 4th gear on occaision, but I had to do that when it was all stock.

Do the mods. Judge for yourself. Heck, it's a Jeep! You have to modify it somehow, you're only human!

 

[jugghead23]

I agree 100% in fact, just placed my order with quadratec for a drop in K&N, Poweraid TBS and the Skyjacker 2" Suspension lift.

These will be the first mods I make and I'm sure won't the last because once the jeep goes through inspection in February, on go the new wheels/tires.

I have to ask though, since this is the first I'm hearing of this. Electric fan conversion? Excuse my n00b-ness... what does that entail?

 

[bryanjeep]

Let us know how you do!!! Good luck.