3.8L Stroker - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 164 Old 10-28-2014, 07:15 AM Thread Starter
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3.8L Stroker

http://www.fourwheeler.com/how-to/en...v6-jk-bumping/


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post #2 of 164 Old 10-28-2014, 07:59 AM
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505 Performance is just down the road from here in Farmington, NM. One of the guys I know down there had them do his 3.8 after it took a dump last summer. He hasn't reported on it yet, but I'll give him a bump and see what he thinks. Pretty good shop from what I hear. They did one of our club member's 401 and he's really happy with their work.
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post #3 of 164 Old 10-28-2014, 02:04 PM
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i read that article but in JP mag. it's interesting but i'd like to hear how it works out.
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post #4 of 164 Old 10-28-2014, 03:18 PM
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My homeboy got back to me on FB and says he's very happy with the 4.1, but thinks a blower might be better. 505 does one called the "Procharger". I don't know anything about it other than my friend says 505 has one on their desert racer. The guy I'm conversing with about the 4.1 conversion is Pres. of the 4x4 club down in Farmington.

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post #5 of 164 Old 10-28-2014, 04:03 PM
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Originally Posted by SoK66 View Post
My homeboy got back to me on FB and says he's very happy with the 4.1, but thinks a blower might be better. 505 does one called the "Procharger". I don't know anything about it other than my friend says 505 has one on their desert racer. The guy I'm conversing with about the 4.1 conversion is Pres. of the 4x4 club down in Farmington.
Procharger is considered the best centrifugal supercharger maker in most circles. They recently released their own kit as well...


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post #6 of 164 Old 10-28-2014, 08:18 PM
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Procharger is considered the best centrifugal supercharger maker in most circles. They recently released their own kit as well...
Anything for the 3.8L?

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post #7 of 164 Old 10-28-2014, 08:34 PM
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Anything for the 3.8L?
The following link states they are working on one:

http://www.procharger.com/jeep_jk.shtml

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post #8 of 164 Old 10-29-2014, 07:34 AM
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I would love to see some HP out put on this, As I would love to have this done to mine. sounds like 505 has it down tho on the oil use and makes the 3.8 way better.


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post #9 of 164 Old 10-29-2014, 08:01 AM
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Anything for the 3.8L?
The 3.8 kit is done (has been for a while). I have ridden in one.


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post #10 of 164 Old 10-29-2014, 08:11 AM
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All I found on their site was a kit for the 3.6L Pentastar.

http://www.procharger.com/jeep_jk.shtml

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post #11 of 164 Old 10-29-2014, 08:14 AM
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I would love to see some HP out put on this, As I would love to have this done to mine. sounds like 505 has it down tho on the oil use and makes the 3.8 way better.
Yeah, 505 does seem like they know what they are doing. Really, having one of their engines would ha good foundation for a blower, just because they use all forged internals. No more oil blow by and garbage like that. Next issue, JP is going to strap their JK on the dynamic and show some numbers. Their Jeep is built pretty much the way that is the norm, so it may even be a good baseline.

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post #12 of 164 Old 10-29-2014, 08:19 AM Thread Starter
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All I found on their site was a kit for the 3.6L Pentastar.

http://www.procharger.com/jeep_jk.shtml
No information on price. Does that mean they can only be purchased with an installation by a dealer? If so, fuck that.


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post #13 of 164 Old 10-29-2014, 11:46 AM
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Procharger may be the best, but no way would I install a centrifugal SC on a Jeep. Roots is the only way to go for any low end improvement.

I agree the stroker kit is very interesting. Fixing the known issues and bumping performance for a reasonable price. Longer stroke should also help low end TQ, which is what the 3.8L really needs, especially those of us with a manual.

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post #14 of 164 Old 10-29-2014, 07:14 PM
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This is interesting thats for sure, what about the RIPP and a stroker????

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post #15 of 164 Old 10-30-2014, 02:55 AM
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This is interesting thats for sure, what about the RIPP and a stroker????
No one seems to have any info on just the stroker let alone a pairing like that. In theory, that setup would be awesome; better low end torque, head work done to optimize that blower, forged internals to hold the thing together, better head gaskets... but at 6500 for the engine and 6500 for the blower, damn, that's Hemi territory. I know, less headaches, growing pains and other issues with the V6, but still...

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post #16 of 164 Old 10-30-2014, 06:36 AM
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No one seems to have any info on just the stroker let alone a pairing like that. In theory, that setup would be awesome; better low end torque, head work done to optimize that blower, forged internals to hold the thing together, better head gaskets... but at 6500 for the engine and 6500 for the blower, damn, that's Hemi territory. I know, less headaches, growing pains and other issues with the V6, but still...

Your right, I seen where they have Hemi installs for 16,500 and a do at home LS for 17,000. I don't know what to do I mean shit. I only want to spend it once!


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post #17 of 164 Old 10-30-2014, 06:38 AM
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No one seems to have any info on just the stroker let alone a pairing like that. In theory, that setup would be awesome; better low end torque, head work done to optimize that blower, forged internals to hold the thing together, better head gaskets... but at 6500 for the engine and 6500 for the blower, damn, that's Hemi territory. I know, less headaches, growing pains and other issues with the V6, but still...
Money aside I'd be worried about the tranny and transfer case, could they handle the power from a blown 4.1 V6? At that price point maybe the reason to go with a V8 is for the bigger tranny?

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post #18 of 164 Old 10-30-2014, 07:04 AM
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Money aside I'd be worried about the tranny and transfer case, could they handle the power from a blown 4.1 V6? At that price point maybe the reason to go with a V8 is for the bigger tranny?
...and by that time you're sliding down the slippery slope baaad...

Honestly, I'd be happy with the little bump in torque and horses that the 4.1 would give. I'm driving a brick, I know that. I think that the small bump would work well with the stock drive train and still be reliable. I like the KISS method when building. Plus! With the stock 6 speed, you could use the new heavier flywheel from Centerforce, which would improve crawling.

I think just the stroker by itself would be a good upgrade for guys looking for a little bump in power without sacrificing the stock drive train and needing the full V8, one ton, monster tires shooting match. I like the approach that Nemesis took for their shop's JK; upgraded stock axles, light as possible and wheel smart.

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post #19 of 164 Old 10-30-2014, 07:12 AM
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...and by that time you're sliding down the slippery slope baaad...

Honestly, I'd be happy with the little bump in torque and horses that the 4.1 would give. I'm driving a brick, I know that. I think that the small bump would work well with the stock drive train and still be reliable. I like the KISS method when building. Plus! With the stock 6 speed, you could use the new heavier flywheel from Centerforce, which would improve crawling.

I think just the stroker by itself would be a good upgrade for guys looking for a little bump in power without sacrificing the stock drive train and needing the full V8, one ton, monster tires shooting match. I like the approach that Nemesis took for their shop's JK; upgraded stock axles, light as possible and wheel smart.
Yep lighter is better, more power with no significant weight increase.

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post #20 of 164 Old 10-30-2014, 09:06 AM
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Unless you have a blown motor, I find it very hard to justify this route. There is ALOT of labor involved in tearing the motor down and swapping in the stroker kit and I am more than skeptical about the advertised power numbers from .3 extra liters of displacement.

For about the same price, you can slap a blower on and get better gains with significantly less labor.


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post #21 of 164 Old 10-30-2014, 10:30 AM
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Me, too. IIRC 505 changes the cam grind, which may help. My friend in Farmington who had this done said he can definitely feel the additonal torque in the low end. But $5k+ worth? Hmmm.....

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post #22 of 164 Old 10-30-2014, 11:47 AM
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Me, too. IIRC 505 changes the cam grind, which may help. My friend in Farmington who had this done said he can definitely feel the additonal torque in the low end. But $5k+ worth? Hmmm.....
But if you need a new engine anyway...

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post #23 of 164 Old 10-30-2014, 12:28 PM
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That's the beauty though, 6k gets you a whole engine, set up by them almost ready to drop in, from what I understand from the magazine article.

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post #24 of 164 Old 10-30-2014, 12:35 PM
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That's the beauty though, 6k gets you a whole engine, set up by them almost ready to drop in, from what I understand from the magazine article.
But you are still doing/paying the labor to remove your motor and drop a new one in. Also depending on where you live, could get a little price to ship a motor twice...


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post #25 of 164 Old 10-30-2014, 01:03 PM
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But you are still doing/paying the labor to remove your motor and drop a new one in. Also depending on where you live, could get a little price to ship a motor twice...
The article says complete engine is $5400 including a $500 core charge, so you don't have to pay to send your's back unless you want the $500 back.

You have to pay shipping to you and purchase a Diablo tuner.

If the stock trannies are holding up to superchargers now does this engine really make that much more power that it's going to matter. IMO the answer is no. The weak link is the motor itself and this will fix that. My worry with an SC is grenading the motor, not the trannie. You could always run less boost to compensate for the increased power the engine makes. It is on the tipping edge of pricing, but so much less trouble than integrating everything to work with a Hemi. Drop it in, bolt on the blower, tune it and go.

$11,000-$12,000 for a simple, dependable 250rwhp without much weight increase. Doesn't seem like a great deal, but it does seem like the headacheless way to go. For under $10,000 I think it would be a no brainer.

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