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  1. #1
    JK Enthusiast DocFuller's Avatar
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    Default anyone do a 3.8 stroker kit?

    Pondering doing this to regain power now that I'm at high altitude. '07 unlimited on 35's, manual with 4.88 gears and SC flashpaq... I prefer the low-end grunt vs. High-end HP... Maybe I do both eventually- wouldn't THAT be gnarly!

  2. #2
    JK Enthusiast Rob50lx's Avatar
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    I would not waste your time and money for a stroker kit. There is only 1 kit that I have heard of and I can't find any reviews that I would trust. The superchips programmer is not meant to be used with extensive engine mods. However, there is a decent local shop that has done custom tunes on a jk with a diablosport.

    I would look into the 3 different companies that offer twin screw/roots style superchargers for more low end grunt. There is even 1 company that is local.

    If money is not an object, then go with a V8 swap with a manual transmission.

    Rob

    Sent from my HTC Glacier using Tapatalk 2
    2009 Sunburst Orange Pearlcoat Rubicon, 2dr, 6spd.
    PSC BFH front bumper, Bushwacker Flares, RH 4x4 rear bumper,
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  3. #3
    Super Moderator Ryan0260's Avatar
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    The 3.8 is pretty much stroked from the factory. You will need forced induction or more displacement like a hemi for more power

  4. #4
    JK Enthusiast DocFuller's Avatar
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    Default

    Good info, thanks guys. Happen to remember the names of great, trusted local shops?

  5. #5
    JK Newbie ICTjku's Avatar
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    I despise the can't be done attitude that this subject brings out of people every time it comes up on the forum I think its a worthy challenge, it would be nice to see a thread dedicated to something more then plug in parts for this engine. I talked with a machinist about the options for the top end. I think the hard part is the bottom end, and the programing.
    2007 Sahara Unlimited

  6. #6
    JK Enthusiast jaybrown's Avatar
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    Newmarket Ontario
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    3.8 is already a stroker as far as I know. It's all stroked out. Lol

  7. #7
    JK Super Freak FlameRedJK's Avatar
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    Quote Originally Posted by jaybrown
    3.8 is already a stroker as far as I know. It's all stroked out. Lol
    Maybe that's why some people sag a little on one side??
    2012 Flame Red Sport Unlimited

    RK 3.5" X-Factor Mid Arm System
    RK HD Drag Link w/ Flip
    RK HD Tie Rod
    Bilstein 5100
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  8. #8
    JK Super Freak DeucesALLin's Avatar
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    Quote Originally Posted by ICTjku
    I despise the can't be done attitude that this subject brings out of people every time it comes up on the forum I think its a worthy challenge, it would be nice to see a thread dedicated to something more then plug in parts for this engine. I talked with a machinist about the options for the top end. I think the hard part is the bottom end, and the programing.
    Stroking an engine is simple, really... especially a low reving pigs like ours! You could just have the crank offset ground and probably match it to an off the shelf rod and piston combo. As long as you use the factory crank and offset grind it for a well researched rod/piston combo you can most likely use SOMEONES oem peices or just pay for one custon peice- hopefully just some cast pistons.

    Heres the thing- your gonna drop $3k for maybe 20 cubes. We get around 1wheel hp per cubic inch anyway... so unles your already rebuilding its not fiscaly responsible to me. I gave up stroking for hp when I went from big block Buicks to turbo 6s. I rather ad 80hp for $4k with forced induction via a twin screw or turbo.
    BEAUTY: 2002 GC Limited: 3"OME HD/5100s/Stillen brakes/HIDs/31.5" Cooper ATPs?All the shit needed to camp, tow, and rescue in style
    BEAST: 2007 JKX 6 spd: 3.3" Frankenlift/37x14.5 IROKs/BirdDogs/5100s/Locked 5.13s/Lighter than stock/All the shit needed to do it right

  9. #9
    JK Super Freak DeucesALLin's Avatar
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    Quote Originally Posted by ICTjku
    I despise the can't be done attitude that this subject brings out of people every time it comes up on the forum I think its a worthy challenge, it would be nice to see a thread dedicated to something more then plug in parts for this engine. I talked with a machinist about the options for the top end. I think the hard part is the bottom end, and the programing.
    Custom cams are actually cheap, and if you have dyno access then you could tune one fairly easy. Probably with the factory injectors too since I assume this would be for low end power. You could probably find 30ft lbs for about $1k after a custom cam and dyno tuning.

    The bottom end will just take ALOT or research and little bench racing.
    BEAUTY: 2002 GC Limited: 3"OME HD/5100s/Stillen brakes/HIDs/31.5" Cooper ATPs?All the shit needed to camp, tow, and rescue in style
    BEAST: 2007 JKX 6 spd: 3.3" Frankenlift/37x14.5 IROKs/BirdDogs/5100s/Locked 5.13s/Lighter than stock/All the shit needed to do it right

  10. #10
    JK Super Freak DeucesALLin's Avatar
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    Quote Originally Posted by DeucesALLin

    Custom cams are actually cheap, and if you have dyno access then you could tune one fairly easy. Probably with the factory injectors too since I assume this would be for low end power. You could probably find 30ft lbs for about $1k after a custom cam and dyno tuning.

    The bottom end will just take ALOT or research and little bench racing.
    ^^^revise^^^

    The torque would cost you probably 10-15 hp up top though...always a trade off.
    BEAUTY: 2002 GC Limited: 3"OME HD/5100s/Stillen brakes/HIDs/31.5" Cooper ATPs?All the shit needed to camp, tow, and rescue in style
    BEAST: 2007 JKX 6 spd: 3.3" Frankenlift/37x14.5 IROKs/BirdDogs/5100s/Locked 5.13s/Lighter than stock/All the shit needed to do it right

  11. Default JK-Forum


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