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Old 10-15-2012, 12:36 PM   #1
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2.4L headers or stroker kit?

Has anyone run across these before? I would be interested in doing such mods of they existed.

Yea yea...please no bombing the post with "V8 or i6 is what you need"

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Old 10-15-2012, 12:47 PM   #2
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You won't see any real performance gains with bolt ons unless you're bolting a SC or turbo on there. Then again that will require other upgrades as well... I don't know anything about the stroker kits for the 4cyl but upgrading the intake / exhaust will not make a noticeable difference.

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Old 10-15-2012, 12:48 PM   #3
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Awhile back I ran across tube headers for the 2.4L. I for the life of me can't find them again! But I do know the were over 400 bucks.
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Old 10-15-2012, 12:51 PM   #4
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I figured... I know about Avenger SCs but geez, $4,000.00??!!
I might as well drop in a new engine!

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You won't see any real performance gains with bolt ons unless you're bolting a SC or turbo on there. Then again that will require other upgrades as well... I don't know anything about the stroker kits for the 4cyl but upgrading the intake / exhaust will not make a noticeable difference.
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Old 10-15-2012, 12:51 PM   #5
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I feel like I did too about a year ago but, like you, I can't find them now...

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Awhile back I ran across tube headers for the 2.4L. I for the life of me can't find them again! But I do know the were over 400 bucks.
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Old 10-15-2012, 12:58 PM   #6
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I figured... I know about Avenger SCs but geez, $4,000.00??!!
I might as well drop in a new engine!
Yea... unfortunately there's no cost effective way to get more power.

Not sure what tires / gears you're running now but that may be a different route. You won't get any more power but you'll have better use of the available power you do have.
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Old 10-15-2012, 12:59 PM   #7
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Well. I have a 2.4 L also. And I have a clod air intake. And I really do find a difference in acceleration with it. Because it is a car engine with DOHC and not the typical jeep single internal cam engine I feel it does respond a bit better to bolt ins such as headers , cat backs and CAIs. Just my opinion but I'm sure I'll be told in wrong by all the 4.0 guys who have never driven the 2.4l with or with out mods!
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Old 10-15-2012, 01:27 PM   #8
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Quote:
Originally Posted by 02Prove

Yea... unfortunately there's no cost effective way to get more power.

Not sure what tires / gears you're running now but that may be a different route. You won't get any more power but you'll have better use of the available power you do have.
Good point. What do you think would be best size of tires for this? And does it worth to change gears with this engine? Thanks.
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Old 10-15-2012, 01:33 PM   #9
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Quote:
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Well. I have a 2.4 L also. And I have a clod air intake. And I really do find a difference in acceleration with it. Because it is a car engine with DOHC and not the typical jeep single internal cam engine I feel it does respond a bit better to bolt ins such as headers , cat backs and CAIs. Just my opinion but I'm sure I'll be told in wrong by all the 4.0 guys who have never driven the 2.4l with or with out mods!
All those things can add up--depending on the engine--so you probably do have more power, but I think what they mean is a lot more power....like more than a few...several percent. Some guys expect 25-30% more power or torque with just a CAI and exhaust, and are likely disappointed.

I was trying to get some more out of a 2.7L auto Tacoma and messed with the intake and one of those $60 bolt-on chips that everybody says they can "feel" more power from, but I did something that none of those guys ever did...actually made a series of timed acceleration runs on the same road before and after--noting ambient temperature, tire pressure and everything else the same--and got nada improvement. Just an example. I know the engine and control system is probably a lot different that a 2.4 Jeep. But zero improvement, actually measured, kept me from blowing even more money on that project.
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Old 10-15-2012, 02:36 PM   #10
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Quote:
Originally Posted by 02Prove

Yea... unfortunately there's no cost effective way to get more power.

Not sure what tires / gears you're running now but that may be a different route. You won't get any more power but you'll have better use of the available power you do have.
I am currently with 4.08 gears on 31x10.5s. I haven't read too many good things from cai addition so I will likely not go that route without headers of some sort. I've seen a few turbo additions but that requires higher rpm for efficacy (most of the time). I am fine with the current stock setup in town I was more curious about helping it breathe easier. And the stroked kit? Well that would just be nice if it was cost effective. I'm curious if the block could handle it...
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Old 10-15-2012, 02:45 PM   #11
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Good point. What do you think would be best size of tires for this? And does it worth to change gears with this engine? Thanks.
There are charts online that will show you optimal gear ratio for the tire size you have (or want).
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Old 10-15-2012, 02:53 PM   #12
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I am currently with 4.08 gears on 31x10.5s. I haven't read too many good things from cai addition so I will likely not go that route without headers of some sort. I've seen a few turbo additions but that requires higher rpm for efficacy (most of the time). I am fine with the current stock setup in town I was more curious about helping it breathe easier. And the stroked kit? Well that would just be nice if it was cost effective. I'm curious if the block could handle it...
My Jeep came with a ricer tube and I thought about selling it but the fenders I'm getting requires replacing the stock air box so I guess I'm stuck with it.

Both the 4 and 6 cyl TJs are pretty much set up from the factory to run at optimal performance... The stock air box isn't really restrictive and both the 4 and 6 are reliable, well balanced, and good running motors.

You have plenty of gear for the 31s... I guess your best bet will be to stroke it unless you want to go with a swap. I'd research the hell out of it and make sure the price difference is going to be worth it (bang for the buck) against a swap?
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Old 10-16-2012, 03:37 PM   #13
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Quote:
Originally Posted by 02Prove

My Jeep came with a ricer tube and I thought about selling it but the fenders I'm getting requires replacing the stock air box so I guess I'm stuck with it.

Both the 4 and 6 cyl TJs are pretty much set up from the factory to run at optimal performance... The stock air box isn't really restrictive and both the 4 and 6 are reliable, well balanced, and good running motors.

You have plenty of gear for the 31s... I guess your best bet will be to stroke it unless you want to go with a swap. I'd research the hell out of it and make sure the price difference is going to be worth it (bang for the buck) against a swap?
Absolutely, I agree that my current setup is fine. It's ok on the road. My point was that IF someone had heard of a kit for stroking it, headers or anything beyond a cai then I would be interested in it.
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Old 10-16-2012, 03:46 PM   #14
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Does the 2.4L come with a cast iron exhaust manifold or headers? The 4.0L comes with headers from the factory so aftermarket headers don't generally help its performance.
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Old 10-16-2012, 04:25 PM   #15
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Absolutely, I agree that my current setup is fine. It's ok on the road. My point was that IF someone had heard of a kit for stroking it, headers or anything beyond a cai then I would be interested in it.
There may not be a "kit" out there but it can be done!
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Old 10-16-2012, 06:59 PM   #16
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Does the 2.4L come with a cast iron exhaust manifold or headers? The 4.0L comes with headers from the factory so aftermarket headers don't generally help its performance.
Jerry, I think its just a manifold but I will double check. Perhaps someone else will pipe in on which it has.
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Old 10-16-2012, 10:23 PM   #17
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It is cast. You will never get over 200hp without boost.
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Old 10-17-2012, 08:01 AM   #18
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Yea, not terribly surprised. That's ok- at least I know a route to go in the years to come. My 2.4 only has 57,000 on it so I'm not concerned about anything in the near future.

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