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Old 10-22-2012, 09:01 AM   #31
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Originally Posted by Xpress View Post
Sure, there are plenty of modded small blocks that are putting out big power, but I'm not a fan of "going with the flow" and just tossing in a V8. Why not mix it up a bit with a more unique engine? Especially one that can be modded equally easily and still put up with a big guns. And have the fuel economy of a 6 cylinder...

Plus it's a Toyota powerplant, one that has absolutely no issues whatsoever
Good luck getting it to work in there I think you just need to by an FJ and be done with it

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Old 10-22-2012, 09:11 AM   #32
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Originally Posted by Xpress

Sure, there are plenty of modded small blocks that are putting out big power, but I'm not a fan of "going with the flow" and just tossing in a V8. Why not mix it up a bit with a more unique engine? Especially one that can be modded equally easily and still put up with a big guns. And have the fuel economy of a 6 cylinder...

Plus it's a Toyota powerplant, one that has absolutely no issues whatsoever
Why not go with a more well known, more powerful LS series engine from GM.

Newer ones all put out higher baseline numbers then the yota engine, has better aftermarket support and gets rather good hwy mileage? Especially in a Jeep, itd be easy to swap, and get great mileage. No brainer to me.

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Old 10-22-2012, 09:18 AM   #33
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^^^although I am the furthest thing from a GM guy, I'd agree 100 percent with that statement. The SBF's fit nicer but you have to do a lil more engineering. But, all this is speculation if the skills aren't present to do an undertaking of that size
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Old 10-22-2012, 10:11 AM   #34
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Quote:
Originally Posted by Ibuildembig View Post
Good luck getting it to work in there I think you just need to by an FJ and be done with it
Quote:
Originally Posted by IndyJeepMan View Post
Why not go with a more well known, more powerful LS series engine from GM.

Newer ones all put out higher baseline numbers then the yota engine, has better aftermarket support and gets rather good hwy mileage? Especially in a Jeep, itd be easy to swap, and get great mileage. No brainer to me.
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^^^although I am the furthest thing from a GM guy, I'd agree 100 percent with that statement. The SBF's fit nicer but you have to do a lil more engineering. But, all this is speculation if the skills aren't present to do an undertaking of that size
Part of the reason is because, I don't want a GM powerplant under my hood. I have never liked GM, personal opinion. Why would I start now? If I ever commented about putting some poorly engineered GM pile of crap in my Jeep, it was all sarcastic.

You can find wrecked Tacomas, FJ Cruisers, and 4-Runners with the 1GR-FE powerplant in them, and yes I have seen them before, up for sale with every driveline component included. To me, it's a personal preference. That is one hell of an engine (if you've ever driven in a newer Tacoma you would know, it certainly can haul a lot of weight for its small size too) for what it is, plus I'd rather a Japanese designed V6 over an American V8, personal preference.

-------------------------

Another damn good option would be the Toyota 3UR-FE V8. That engine has a LOT of torque. I don't know if it's just the way GM engines are designed, or if it's maybe the truck behind them or what, but I've never been impressed with the power output of the GM 350 sized engines. Toyota 5.7L is essentially similar sized, but a lot more powerful IMO. Punch it and the traction control goes mad trying to keep it under control. It also has the TRD Supercharger option which puts the power over 500hp...

Besides, 380hp is almost too much power for a Jeep...
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Old 10-22-2012, 10:13 AM   #35
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The amc 2.5L is not an iron duke btw. Common misconception.
You're correct, however the AMC 2.5L FI models are more powerful and more reliable (with FI that is).
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Old 10-22-2012, 10:25 AM   #36
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380 too much power? LOL, I forgot....you are from CA
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Old 10-22-2012, 10:41 AM   #37
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Originally Posted by 2xs

I bought it with an engine swap in mind, then the economy tanked, I still love it, and im currently still collecting swap parts.

Got an AX15 and Tcase from a 92 XJ, got a GM 90* bellhousing, and pretty soon ill have the SSYE and GM Bell adapter soon.

Then I gotta find the donor vehicle....
Sweet, yeah gas price was the only reason and m glad I found my jeep
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Old 10-22-2012, 10:42 AM   #38
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I got them from Liveoffroad.com as a deal on selling my 46 CJ2a to their other company Kaiserwillys.com
They are Spicer gears.
They gave me a nice credit at their store and I got a lot of awesome stuff from them. There are several vendors on this site that sell gears and will give you a discount from being a member.
Oh sweet thanks how do I find those site that will know I'm a member at??
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Old 10-22-2012, 10:50 AM   #39
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I love my 2.5L engine swap all u wants guys, if u wanted more power should bought a pick-up and a sports car, I have a Kawasaki Vulcan 900 Custom and its not as powerful as anything out there but sure did save a lot of money then buying a Harley , so I use that money to MOD THE CRAP OUT OF MY BIKE, IMOP If u do a engine swap one day u will regret it, and wish u still had the 2.5L
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Old 10-22-2012, 10:52 AM   #40
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I've never regretted any of the ones I have done
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Old 10-22-2012, 01:21 PM   #41
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Keeter6227, Seriously, WHY would I ever wish for the 2.5L that I dont want?
ANY 4.3 or 5.0/5.7 will give me what I want, and give me the power to tackle any off road obstacle I decide to try. Why do you think people have books solely devoted to engine swaps? (here is a hint: they want more POWER!).
I bought my Jeep knowing what I wanted, has to be straight, and clean, the rest I can deal with to make it MY Jeep, similar to how Xpress wants to hack his Jeep up with a Toyota powerplant, I want an American powerplant, and since im a GM tech, guess what? you do what you know and love.....

Let me add: im happy you like your 2.5L, and im not trying to talk you into a engine swap, but dont knock others that want more.
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Old 10-22-2012, 03:07 PM   #42
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Originally Posted by 2xs
Keeter6227, Seriously, WHY would I ever wish for the 2.5L that I dont want?
ANY 4.3 or 5.0/5.7 will give me what I want, and give me the power to tackle any off road obstacle I decide to try. Why do you think people have books solely devoted to engine swaps? (here is a hint: they want more POWER!).
I bought my Jeep knowing what I wanted, has to be straight, and clean, the rest I can deal with to make it MY Jeep, similar to how Xpress wants to hack his Jeep up with a Toyota powerplant, I want an American powerplant, and since im a GM tech, guess what? you do what you know and love.....

Let me add: im happy you like your 2.5L, and im not trying to talk you into a engine swap, but dont knock others that want more.
Not knocking Wut others have to say or do bud it's ur jeep do with as u please , he'll if I wanted to I'd take the motor out my 11' Sierra and put it in, I sure ull have a fun time doing ur swap, I'm just stating that this thread was how to get more power out of you 2.5l not talk about motor swap, I had a 2.0 L VW Jetta and people knocked me for not getting the VR6 swap or turbo the motor or supercharge it but once I was done with it they said man that thing is fast and never ragged on me and I had turbo guys asking me did I have a power adder on it and said no, and they were impressed . Yes the 2.5L is now a powerhouse but its a work horse, it my not finish the race first but ull cross the line someday lol!!
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Old 10-22-2012, 03:18 PM   #43
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You could get the 2.9 stroker
Forced air
Big cam
4.0 Throttle body.

JP did an article on this a while back I think.
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Old 10-22-2012, 03:52 PM   #44
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Quote:
Originally Posted by Xpress

Part of the reason is because, I don't want a GM powerplant under my hood. I have never liked GM, personal opinion. Why would I start now? If I ever commented about putting some poorly engineered GM pile of crap in my Jeep, it was all sarcastic.

You can find wrecked Tacomas, FJ Cruisers, and 4-Runners with the 1GR-FE powerplant in them, and yes I have seen them before, up for sale with every driveline component included. To me, it's a personal preference. That is one hell of an engine (if you've ever driven in a newer Tacoma you would know, it certainly can haul a lot of weight for its small size too) for what it is, plus I'd rather a Japanese designed V6 over an American V8, personal preference.

-------------------------

Another damn good option would be the Toyota 3UR-FE V8. That engine has a LOT of torque. I don't know if it's just the way GM engines are designed, or if it's maybe the truck behind them or what, but I've never been impressed with the power output of the GM 350 sized engines. Toyota 5.7L is essentially similar sized, but a lot more powerful IMO. Punch it and the traction control goes mad trying to keep it under control. It also has the TRD Supercharger option which puts the power over 500hp...

Besides, 380hp is almost too much power for a Jeep...
You can supercharge and engine. Just because toyota has a "branded" off the shelf supercharger doesnt make it superior.

Since you said "350" size GM engine, when is the last time you drove a GM or even a Ford with the newer aluminum LS series or the ford series like ecoboost? I think youd feel the same way.

It all comes down to preference, but I prefer a well known engine that has great power/torque, mpg, reliability and ease of swap. Also a massive aftermarket. LS 4.8/5.3/6.0 fits that bill well.

A 5.0, Ecoboost or similar Ford engine would be nice too. You're just lucky I love my Diesel instead of gas burners
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Old 10-22-2012, 04:01 PM   #45
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Im just curious what that rice rocket with a hairdryer really costs to buy....I know the motor in RJ is way more than that, and I am betting for way less cash
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Old 10-22-2012, 05:24 PM   #46
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similar to how Xpress wants to hack his Jeep up with a Toyota powerplant, I want an American powerplant
A Toyota 5.7L 3UR-FE is an American manufactured engine.... Moreso than what a lot of these so called "American" manufactured engines are.

http://en.wikipedia.org/wiki/Toyota_...turing_Alabama

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You can supercharge and engine. Just because toyota has a "branded" off the shelf supercharger doesnt make it superior.

Since you said "350" size GM engine, when is the last time you drove a GM or even a Ford with the newer aluminum LS series or the ford series like ecoboost? I think youd feel the same way.

It all comes down to preference, but I prefer a well known engine that has great power/torque, mpg, reliability and ease of swap. Also a massive aftermarket. LS 4.8/5.3/6.0 fits that bill well.

A 5.0, Ecoboost or similar Ford engine would be nice too.
Not too long ago, still not impressed. When was the last time you drove a 5.7L Tundra? Okay, so it's not exactly a rocketship like a sleeper muscle car, or a turbo diesel running 30psi of boost, but it's still a powerful engine.

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I'll take a diesel anyday
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Old 10-22-2012, 06:06 PM   #47
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The original question was, how can I get a bit more power out of my 2.5l YJ?

He didn't ask how to get 300+hp or even 200hp.

He just wants to make his 2.5L jeep a bit better.
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Old 10-22-2012, 06:54 PM   #48
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If you have a later 2.5 there are a few mods you can do, and I have seen them done, but I have yet to see anything that amounts to much. As I have said before gearing is the best thing you can do to the 2.5.
This topic has been stomped, smashed, beaten, stabbed, trampled, kicked, slaughtered (I am sure that I am missing a few more)
But it sure get some folks blood pumping every time.

A motor swap is what a lot of others do when they get tired of throwing money at it or getting passed by mopeds, but that really isn't getting more power out of the 2.5 is it? The 2.5 is a real disappointment to a lot of people as power goes, but they do good off-road, and are fairly dependable. My biggest problem with them is that before I got the one I have now, I have always had V-8's and 4.0's in my Jeeps. It isn't all about the h.p. to me it is about the torque, and the 2.5 doesn't have what it takes without a gear reduction to help it. So good luck with your quest.

Keeter, there is a vendor section at the top of the opening page of Wrangler Forum. Click on that and read some of the posts in that section. There are some good deals
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Old 10-22-2012, 07:23 PM   #49
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Not knocking Wut others have to say or do bud it's ur jeep do with as u please , he'll if I wanted to I'd take the motor out my 11' Sierra and put it in, I sure ull have a fun time doing ur swap, I'm just stating that this thread was how to get more power out of you 2.5l not talk about motor swap, I had a 2.0 L VW Jetta and people knocked me for not getting the VR6 swap or turbo the motor or supercharge it but once I was done with it they said man that thing is fast and never ragged on me and I had turbo guys asking me did I have a power adder on it and said no, and they were impressed . Yes the 2.5L is now a powerhouse but its a work horse, it my not finish the race first but ull cross the line someday lol!!

You are right, so back on topic.

flaming82001 what year is your Jeep? the 2.5 TBI or the port injected engines are different, and if you live in an emissions state, there are different options.

How much do you plan on spending to gain more power?

Currently, there is a header for both, CAI for the PFI engine, and a few camshafts that can net you more power. You can also rework your head, slightly bigger valves (I have never hear of this on a Jeep 2.5L, but im sure its possible), and other engine mods that can en expensive.
I dont recommend a turbo or supercharger without some serious engine work.
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Old 10-22-2012, 07:54 PM   #50
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This is entirely theoretical...

Judging by the picture in the OP's avatar, there is a sport style rollbar. If that is factory, then it means the Jeep is a 1987-1990 model, meaning the engine is (likely) a TBI version. There really isn't a whole lot you can do. Maybe a throttle body spacer, high flow intake, a catback exhaust, headers, and then of course the electric fan, but that might net you around 5-10hp at the most, then of course you can always re-gear for your tires, which will give you the best power output.

If you really want to get into it, you can do a 2.9L stroker kit.

Now if you live in a smog exempt state (unlike me, who has to live with Cali Smog Nazis') there's a lot more you can do, like a Turbocharged 2.9L Stroker engine.
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Old 10-23-2012, 01:28 AM   #51
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Cant do a Cold Air Intake in an emissions state, you would remove the TAC system.

< IS a Cali smog Nazi...
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Old 10-23-2012, 02:28 AM   #52
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Originally Posted by d5string
If you have a later 2.5 there are a few mods you can do, and I have seen them done, but I have yet to see anything that amounts to much. As I have said before gearing is the best thing you can do to the 2.5.
This topic has been stomped, smashed, beaten, stabbed, trampled, kicked, slaughtered (I am sure that I am missing a few more)
But it sure get some folks blood pumping every time.

A motor swap is what a lot of others do when they get tired of throwing money at it or getting passed by mopeds, but that really isn't getting more power out of the 2.5 is it? The 2.5 is a real disappointment to a lot of people as power goes, but they do good off-road, and are fairly dependable. My biggest problem with them is that before I got the one I have now, I have always had V-8's and 4.0's in my Jeeps. It isn't all about the h.p. to me it is about the torque, and the 2.5 doesn't have what it takes without a gear reduction to help it. So good luck with your quest.

Keeter, there is a vendor section at the top of the opening page of Wrangler Forum. Click on that and read some of the posts in that section. There are some good deals
Thanks man !!
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Old 10-23-2012, 02:29 AM   #53
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Quote:
Originally Posted by Speedy4x4
The original question was, how can I get a bit more power out of my 2.5l YJ?

He didn't ask how to get 300+hp or even 200hp.

He just wants to make his 2.5L jeep a bit better.
Thank you speedy!!
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Old 10-23-2012, 02:49 AM   #54
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Cant do a Cold Air Intake in an emissions state, you would remove the TAC system.

< IS a Cali smog Nazi...
Well that's why I didn't say a CAI. But, one could just slap the factory box back on for you to make you happy
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Old 10-23-2012, 06:29 PM   #55
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Well that's why I didn't say a CAI. But, one could just slap the factory box back on for you to make you happy
That is a common occurrence, I have a lot of Jeep guys and 2 Jeep shops where they occasionally forget, and hate it when I send them packing.....

But they always come back, seems im becoming well known for my shenanigans....
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Old 11-17-2012, 10:11 AM   #56
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[QUOTE=Xpress;2909700]Agreed, I get around 18mpg. It cruises fine with 4.10's, 5 speed, and 235/75's.

18 mpg? jeez, then what is mine doing wrong?? *lol*
I think I`m lucky to get 13 at best out of my 2.5.
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Old 11-17-2012, 09:25 PM   #57
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Does anyone like a ford drive line?
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Old 11-17-2012, 11:45 PM   #58
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Does anyone like a ford drive line?
Ibuildembig is the resident Ford guy.....
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Old 11-18-2012, 08:06 AM   #59
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Cant do a Cold Air Intake in an emissions state, you would remove the TAC system.

< IS a Cali smog Nazi...
What is a TAC? I replaced my intake box with a Rugged Ridge CAI and it has all of the same connections. The only difference is the filter box and filter.
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Old 11-18-2012, 08:27 PM   #60
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What is a TAC? I replaced my intake box with a Rugged Ridge CAI and it has all of the same connections. The only difference is the filter box and filter.
the 2.5L TBI engine has a TAC system, its a vacuum controlled door that changes the air the air cleaner takes in, when the vehicle is cold it pulls hot air off the exhaust manifold through a hot air tube, when the engine warms up, the door actuates and the air is pulled from behind the driver side headlight.







Theese are actually on a 90 XJ, but the 2.5L TBI engine is very similar.

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