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Has anyone destroyed a modular block from too much power?

Discussion in 'Road Side Pub' started by IUP99snake, Aug 27, 2013.

  1. IUP99snake

    IUP99snake The Shocker Established Member

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    We've seen lots of stories of people splitting pushrod blocks quite literally down the middle because they've exceeded the power capabilities of the block. For a stock 302 block, it was around 600 HP. Anything more than that, and you're on thin ice.

    We've had these arguments with modular blocks too. Because there are many different production versions of the same block in both iron and aluminum, the debate is often about which block is strongest amongst the group.

    Sometimes people will say a Teksid block is "good for over a thousand HP." Some people say an iron 03 Cobra block is good for twice that. And some people say an iron boss block will handle even more power. (these are just random exaggerated guesses... I don't know what the actual power limits of these blocks are).

    With that being said, we have very little facts in which to base these arguments. It's mostly based on what racers claim to have accomplished. And even that is based on a tiny sample size.

    So, I'd like to know. Who's split a modular block? Who's damaged or destroyed one because it simply wasn't strong enough to handle the power that was created?

    Damage caused by broken rods peeking through, melted pistons, or warpage due to overheating doesn't count.

    I've destroyed a Teksid block. But it certainly wasn't because the engine was making enough power to tear itself apart. Instead, my block died while it was idling. The shop that installed it didn't burp the coolant properly and overheated it while letting it idle in the shop before strapping it to the dyno.

    What's the most power anyone's made on a modular block? Who's actually destroyed one due to power? What's the point of reliable, repeatable failure? 1000 HP? 2000 HP? Is it higher than the strongest available internals are capable of, making it a non-issue?

    I want to know once and for all. I'm willing to bet that even a lowly stock 96 GT block can withstand more power than 99% of us make on the street. A Teksid block or 03/04 iron block can withstand more power than 99.9999% of us make on the street or strip.
     
  2. SID297

    SID297 OWNER/ADMIN Staff Member Administrator

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    Saw plenty of early WAP blocks fail. Parts of the casting were ridiculously thin.
     
  3. testorossa1989

    testorossa1989 Well-Known Member Established Member

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    I think the turbo guys may know the answer
     
    Last edited: Aug 27, 2013
  4. bluebosss197

    bluebosss197 Salami snackbar! Established Member

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    What parts?
     
  5. dbmach12004

    dbmach12004 SuperStar Established Member

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    Good question, I was always very curious about this, there really isn't much data to prove or disprove any single persons claims as to a blocks strength...I kind of want to push the limits of my NPI block but I'm not willing to dump that kind of cash into something I'm trying to destroy.... I am willing to donate my block for testing as long as someone else picks up the tab:rolling:
     
    Last edited: Aug 27, 2013
  6. ibleedblue65

    ibleedblue65 Active Member Established Member

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    Stock 5.0 blocks are typically not considered to be good to 600. Many make it there but you start getting into grey area at 450-500 at the crank.

    I've yet to see a modular block break first hand. I've seen a couple of rods through the side of blocks but not one fail on its own. Also haven't built one that made more than 700-750 at the wheels so that's not saying much.
     
    Last edited: Aug 27, 2013
  7. acdrew

    acdrew Member Established Member

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    ok
    :pop:
     
  8. svtfocus2cobra

    svtfocus2cobra Opprimere, Velocitas, Violentia Operandi Established Member

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    When the Hellraiser kit first came out I remember one of the Mustang mags throwing in on a Cobra with a fuel system to see how far it would go. I think I remember them saying it made 116Xwhp before it lifted the heads.

    There's definitely more power than that that's been made, but for a basically stock motor that's a lot that it held up. Lets not even get into the FGT 5.4! Didn't someone make 2100whp with much of the stock components still in place?
     
  9. HEMIHUNTER

    HEMIHUNTER Well-Known Member Established Member

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    There are some you tube vids showing shops doing this to various stock motors to see where they fail. Some are pretty impressive.
     
  10. IUP99snake

    IUP99snake The Shocker Established Member

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    I did a little more research into this and what I found was that the modular blocks typically don't fail in spectacular fashion like the pushrod blocks, but instead have less catastrophic problems that can rob power or cause other parts to fail.

    FRPP Boss 5.0 Block - Cast-Iron Modular Block - 5.0 Mustangs & Super Fords Magazine

    As power levels increase beyond [500 hp], aluminum blocks have a tendency to develop more flexibility or "walk" in the bottom end, which, among other things, adversely affects piston ring seal. When the rings aren't sealing, power is leaking away, as is durability. "At as low as 500 hp, you'll make more power with an iron-block than an aluminum block because the rings will seal and last longer," says FRPP's Jesse Kershaw.

    According to this article, blocks with aftermarket sleeves can experience with the cylinder shape distorting. But I'm guessing this isn't as much of a problem with stock-bore blocks (and certainly not with the boss 5.0 block)

    The Sutton High Performance crew out of Illinois ran a prototype Boss 5.0 iron-block in its e.t. and mph record-setting EFI Renegade S197 during the '07 NMRA season. Previously, they had campaigned both wet- and dry-sleeved 3.700-bore aluminum blocks. Some good reasons for the switch, according to Sutton engine-builder Jerry VanDerLinde, include: "Two different times we actually broke the main webbing out of the aluminum block. No matter which sleeve system we used, they would egg-shape or distort under the power we gave them. We'd then lose compression and power."
     
  11. static74

    static74 in the 9's Established Member

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    That is pretty interesting, wonder if I dodged a bullet by dumping the mach 1 block.
     

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