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  1. #1
    Slayer of Gods... DoomsDay's Avatar
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    Manley H Beam rods? How much HP?

    I've done the usual reading and searching through threads, and i've been to the website and read the HP ratings which i know plenty of people have exceeded the "700" hp listed rating.


    I'm going to be having my motor built in january and need to get an idea of what most people are making on these rods? Right now im either having to pick between these and the Billet I beams.

    The current setup is a custom single turbo setup running a Single GT42-76.

    The I beams will definately get me over the 1000rwhp mark but what about the H beams? There is a conciderable price difference between the two and rightly so concidering.

    Will the H beams handle 850rwhp-900rwhp or would that put them on borrowed time even with a good tune? I'd like to hit the 1k mark but I'f i can do with with the H beams is unknown to me.

    Any help would be appreciated
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  2. #2
    SVT God Blown02's Avatar
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    mine made 815rwhp.. they only rated my h beams to 700 flywheel hp.. i was gonna take them to 1000rwhp, but I blew a headgasket.. if i were u i would go ahead and do the billet rods.. thats what Im runnin now..

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  3. #3
    Slayer of Gods... DoomsDay's Avatar
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    Was quoted they were a 1200 upgrade over the Hbeams

    I figure if nothing else i could run the h beams to around 850rwhp and then swap to the I beams later

  4. #4
    N/A FTW! droptopsnake01's Avatar
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    the shop im associated with has been running a eagle H beam on their race car for over 2 years. Making over 1000rwhp the whole time.

    Its up to you, i personally think a H beam will be fine.

  5. #5
    SVT God Blown02's Avatar
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    h beam will prob be fine.. but to "swap"out the h beams for billet rods is no easy task.. not only does the motor have to be pulled but the motor has to be disassembled, re-balanced, etc.etc.etc. and will cost a ton!
    u can get forged h beams for $350 and billet ones for $1,200.

  6. #6
    Crazy SVT Poster
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    get the I beams and you won't ever have to worry about upgrading!!!!!
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  7. #7
    Pushrod > 4v Nvr_Spds's Avatar
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    I would say go with the billets, but if you want to save some money, and run H-beams, with the best rod bolts you can.
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  8. #8
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    if your looking for 1000hp I would get those I beams. Throw some nice pistons on them and you never have to think about the bottom end again...

  9. #9
    Crazy SVT Poster SN8KBYTE's Avatar
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    I sleep better at night with the billet Manley's. Spend the extra money now and you won't be sorry later.
    99 Cobra #76, VT engine, 9cc CP pistons, Manley billet rods, billet oil pump gears, stage 3 ported heads, Ford GT cams, Procharger D1sc @ 19.5# w/ race bypass, Nazman ported intake, head cooling mod, Accufab single blade tb, custom made 4" intake system, 03 cobra tank, twin gt pumps, Kenne Bell bap, stage II fpdm and wiring, 60# mototron injectors, PMAS and SCT tune.

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  10. #10
    Slayer of Gods... DoomsDay's Avatar
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    Quote Originally Posted by SN8KBYTE View Post
    I sleep better at night with the billet Manley's. Spend the extra money now and you won't be sorry later.
    Yeah i have the feeling im gonna have to suck it up and go with the Billets too

  11. #11
    Rookie SVT Poster Tunnelvision's Avatar
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    With 1000rwhp, you'll need all you can get . You may want to have those Manley billets blessed with holy water too.
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  12. #12
    Slayer of Gods... DoomsDay's Avatar
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    Meh thats not near the max rating for the I beams. It's like 1200rwhp or so. I could always step up to 300m's though lol

  13. #13
    Crazy SVT Poster E.A.'s Avatar
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    It's all about having a good tune.....

    I have seen Manley H beams hold up to 1700hp for 2+ years on a full on race car.... Then a set of Eagle H beams hold the same.

    But if it would have been detonating.... well that would have been the end of them instantly.

    I know countless cars making 800+ rwhp, with NO issues with the H beams.


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  14. #14
    Svt God of All 69gt4speed's Avatar
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    I thought the h beams use 3/8 bolts and the good i beams used 7/16? That's quite a difference in equal quality bolts. Since it is being built, apart etc. I'd do the 7/16's.
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  15. #15
    N/A FTW! droptopsnake01's Avatar
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    make sure you get a quality rod bolt
    arp 2000's will do the trick

  16. #16
    Dirrty North Smokey1226's Avatar
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  17. #17
    Slayer of Gods... DoomsDay's Avatar
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    Thanks for the info guys, any info is definately appreciated.

    Anyone used these for over 900rwhp?

  18. #18
    N/A FTW! droptopsnake01's Avatar
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    we have had a race car w/ H-beam making over 1000rwhp thru a powerglide for 2 years with those rods.

  19. #19
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    Whats the difference between MMR H beam rods (made by Manley) and the standard Manley brand H beam rods? They look the same. I have been wondering this for awhile....

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