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  1. #26
    Administrator Ninergrad's Avatar
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    So the 426 wont work with boost because it is making to much HP???
    So what exactly would go first on 426? The block itself?
    And what exactly would you need to make it actually take 15# of boostalicious?
    I mean pistons with lower compression is a given... what else ?
    -Davit.

    98 ZJ 5.9L Slate
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  2. #27
    Banned Wrinklechops's Avatar
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    A boosted 426... hello world record for speed in a ZJ

  3. #28
    Member 5.9_Racer's Avatar
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    thinking a standard block would go first... it is just weak at 60 over which I believe is what at 425/426 would need. Sleeving the block might help, but its still gonna have less material over stock and the HEAT would just be incredible.

    R3 Siamese bore is whatcha really need the you move the weak link to something else.
    Rarely Active, in case you are looking for me on here.....
    Past: 92 MJ --> 89 XJ --> 99 WJ --> 92 YJ [RIP] --> 98 ZJ [RIP] --> 05 LJ --> 98 ZJ
    Last: Stroker - 410Cu In, SuperCharged '98 ZJ (500hp+) @12.2 - 1/4mile.... she was a blast!!
    Click here for my build thread....Project Fireheadman 6.7L SuperCharged and Stroked

  4. #29
    Forum CONDUCTOR Man Z88Z's Avatar
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    Quote Originally Posted by Ninergrad View Post
    So the 426 wont work with boost because it is making to much HP???
    So what exactly would go first on 426? The block itself?
    And what exactly would you need to make it actually take 15# of boostalicious?
    I mean pistons with lower compression is a given... what else ?
    Well, I don' know about the rest of it but head gaskets always seem to be the bugaboo on these builds.

    I think O ringing and or panographing (sp?)
    might be necessary

  5. #30
    RallyJeep GO
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    If you could keep the head gasket and block from exploding, you could boost a 426, although with the already high compression, there's no way it'll run on pump gas. It'll be either E85 or race gas for that thing. It would go like heck though!
    1998 ZJ 5.9 Limited - Deep Slate
    Mods: Big trans cooler, 231 swap, Indy MA-X heads prepped by IMM, Comp 20-744-9 cam, 1.7 HS roller rockers, 52mm TB, Airgap manifold, DT headers and full 3" exhaust, SCT tune homebrewed by me, Martin Saine valve body, B&M tranny pan, magic suspension made from unicorn tears, power steering cooler, lots of lighting mods

  6. #31
    Last Shadow RINGWRAITH's Avatar
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    again.....you don't necessarily need to bore a Mag block 30 over!!!!
    426 cid is accomplished with a 30 overbore and stroke of 4.180......
    a crank with 4.250 stroke and 30 overbore=434cid...with custom pistons...
    Captain of the Nine

  7. #32
    Last Shadow RINGWRAITH's Avatar
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    and there already is a 414 R3 with T-Trim in a 9er.........
    Captain of the Nine

  8. #33
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    has anyone here run the 426 kit? would it be a real knowticeable butt dyno change from the 408 or say 390?

    Im interested!

  9. #34
    Modfag Saleen4971's Avatar
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    426 has a big stroke, so HUGE torque numbers
    Ross
    1998 Grand Cherokee 5.9 Limited
    MPP Headers - Thunderbolt Metallic Cat - 3" Mag catback - EBC Brakes w/ drilled Rotors - 4bbl M1 - Vortech 12psi - Built trans & 2900 stall - Ford 8.8 - Addco & Hellwig Sways - Poly Bushings - H&R Springs - Grabber UHP Tires - Alpine/Infinity Stereo - FX-R BiXenon Retrofit

  10. #35
    Administrator Ninergrad's Avatar
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    I just bought this book.
    http://www.themotorbookstore.com/howtobubimos.html
    Was reading it today at work.

    Anyone who intends to run strokers should pick one up. Really good read there!!!
    -Davit.

    98 ZJ 5.9L Slate
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    98 Ram 2500 5.9L 24V Cummins, short bed, Blue
    MBPR Turbo back 4" exhaust, Edge Juice, Superchips tuner.


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  11. #36
    Last Shadow RINGWRAITH's Avatar
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    Quote Originally Posted by Ninergrad View Post
    I just bought this book.
    http://www.themotorbookstore.com/howtobubimos.html
    Was reading it today at work.

    Anyone who intends to run strokers should pick one up. Really good read there!!!
    been saying that for like 4 years...................
    Captain of the Nine

  12. #37
    Banned Wrinklechops's Avatar
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    Will that book cover fuel injection motors or just carb motors? Seems like all the great power number Mopar blocks I can find are all carb

  13. #38
    Modfag Saleen4971's Avatar
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    both
    Ross
    1998 Grand Cherokee 5.9 Limited
    MPP Headers - Thunderbolt Metallic Cat - 3" Mag catback - EBC Brakes w/ drilled Rotors - 4bbl M1 - Vortech 12psi - Built trans & 2900 stall - Ford 8.8 - Addco & Hellwig Sways - Poly Bushings - H&R Springs - Grabber UHP Tires - Alpine/Infinity Stereo - FX-R BiXenon Retrofit

  14. #39
    Last Shadow RINGWRAITH's Avatar
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    Quote Originally Posted by Wrinklechops View Post
    Will that book cover fuel injection motors or just carb motors? Seems like all the great power number Mopar blocks I can find are all carb




    Thats because of the econo W2 to W9 heads.....and use of W2 1 7/8" headers.....and W2 intakes..............
    Captain of the Nine

  15. #40
    Administrator Ninergrad's Avatar
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    there is one with m1 on top of it actually. there's also one in that book with mopar 4bbl on it both fuel injected.
    Really good book. Cost me like 20 something shipped. Anyone who is going to br doing 408s and 414 and 416s and 226s should read it.

    Like Rick said you can actually have a 426 without going over 0.30. That is what I am trying to figure out now. I WANT 426, but I want to make sure I can keep the head gaskets intact as well as what is all needed to make it sing. I want to keep compression within 9:1 so i can boost her.

    Rick I think I need to call you again lol.
    -Davit.

    98 ZJ 5.9L Slate
    Click here for MODS

    98 Ram 2500 5.9L 24V Cummins, short bed, Blue
    MBPR Turbo back 4" exhaust, Edge Juice, Superchips tuner.


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  16. #41
    Last Shadow RINGWRAITH's Avatar
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    Quote Originally Posted by Ninergrad View Post
    there is one with m1 on top of it actually. there's also one in that book with mopar 4bbl on it both fuel injected.
    Really good book. Cost me like 20 something shipped. Anyone who is going to br doing 408s and 414 and 416s and 226s should read it.

    Like Rick said you can actually have a 426 without going over 0.30. That is what I am trying to figure out now. I WANT 426, but I want to make sure I can keep the head gaskets intact as well as what is all needed to make it sing. I want to keep compression within 9:1 so i can boost her.

    Rick I think I need to call you again lol.
    yea...you never told/called me about how the gears felt, so I could have told you, you should have gone to 4.56s.....................oh well, used, abused, then forgotten about.
    Captain of the Nine

  17. #42
    Administrator Ninergrad's Avatar
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    LOL!!!
    HEY!!! I have yet to drive her to feel the gears. Getting vibration upfront so she has been back at the shop. I can tell you tomorrow though.
    -Davit.

    98 ZJ 5.9L Slate
    Click here for MODS

    98 Ram 2500 5.9L 24V Cummins, short bed, Blue
    MBPR Turbo back 4" exhaust, Edge Juice, Superchips tuner.


    http://autotruckservice.org/

  18. #43
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    hey guys just curious i read on alot of the dodge boards the 426 isnt a cruiser like the 408 is , too much heat and cooling the beast is tough, is this true?

  19. #44
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    I'm also wondering what kind of budget to account for when doing a 408 stroker (or 426 if it's streetable).

    Do the Hughes 408 kits come with everything needed? What would it
    cost to get it installed roughly if I'm not able to bore my block or do machine work?

    I was hoping to be in for under 3k for
    everything....am I close?
    Platinum 5.9, Built 44RE and a few bolt-ons, 4``lift with 33`s.

  20. #45
    Member northwest_5.9's Avatar
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    Quote Originally Posted by Eldoradoman View Post
    I'm also wondering what kind of budget to account for when doing a 408 stroker (or 426 if it's streetable).

    Do the Hughes 408 kits come with everything needed? What would it
    cost to get it installed roughly if I'm not able to bore my block or do machine work?

    I was hoping to be in for under 3k for
    everything....am I close?
    with heads?

    J(Just)E(Empty)E(Every)P(Pocket)


    03' Durango R/T---All Stock, for now!
    Slate 5.9er--- 210 Cam, EQ heads, Air Gap, 52mm TB, 24# injectors, & Hemifever Juiced UP!.
    03 ram "hemi"

  21. #46
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    Quote Originally Posted by northwest_5.9 View Post
    with heads?
    No, I'll have heads by then, just wondering how much beyond the actual parts it would ballpark cost for machine work and prep?
    Platinum 5.9, Built 44RE and a few bolt-ons, 4``lift with 33`s.

  22. #47
    Member NoTime's Avatar
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    What ever you budget,,,,,,,,, double it
    1998 ZJ 5.9 Platinum - 408 SC Sleeper ( 7.49 / 11.? )
    2012 RAM - Tow Vehicle
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  23. #48
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    Quote Originally Posted by NoTime View Post
    What ever you budget,,,,,,,,, double it
    Haha, good to know, let the penny-pinching begin!
    Platinum 5.9, Built 44RE and a few bolt-ons, 4``lift with 33`s.

  24. #49
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    I have done all that...and my budget went well north of 3k. Imagine the 408 stroker kit from Hughes is already $1700 and then the heads...depending on which ones (2.02) run you another $1300-$1700...Iron Rams or Eddys. Can't say that the 24lb injectors were that noticeable. I know ther eis still tuning to do to mine...but it runs smoother with the stock ones in. The machine work is alot too...hopefully you have a hook up. I can say this now...get a better tranny before you do the engine...mine didn't last long soon there after. I saw someone on here mention a 46rh....why in the world would you want a hydraulic one when the 46re is better? As for cams...that is really your call. Mine is a Custom Grind Comp Cam that pulls from 900rpm all the way to 6200. Careful with the electric fan...I got mine from HiPoTek and it came with an auto thermostat where it will continue to cool after the jeep is off...drains the battery bad. I can tell you all about the horror storys of the build...but I am one person and no help and only a local shop that doesn't specialize in these applications. Hopefull you that want to do this will have really good connections. The amount of money I have put in to mine and now it sits waiting on a tranny...I could have bought a different vehicle with hp and tq and still get better mileage. Then it just wouldn't be a Jeep thing...so I go forward with the build.

  25. #50
    Modfag Saleen4971's Avatar
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    The rh tends to last longer and hold more power. Its also pretty much required if you go with a standalone ecu
    Ross
    1998 Grand Cherokee 5.9 Limited
    MPP Headers - Thunderbolt Metallic Cat - 3" Mag catback - EBC Brakes w/ drilled Rotors - 4bbl M1 - Vortech 12psi - Built trans & 2900 stall - Ford 8.8 - Addco & Hellwig Sways - Poly Bushings - H&R Springs - Grabber UHP Tires - Alpine/Infinity Stereo - FX-R BiXenon Retrofit

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