500hp pump gas NA SBB is it possible.

Discussion in 'Small Block Tech' started by Buickboy69, Jul 3, 2018.

  1. Buickboy69

    Buickboy69 Active Member

    Was wondering if any of you have done this or if it is even possible to do with the technology that is available ie. No aluminum heads.
  2. sean Buick 76

    sean Buick 76 Buick Nut

    Yes it’s possible but it won’t be too Street friendly...

    SP-3 intake, professionally ported heads with oversized valves, custom pistons, Molnar rods, 11:1 static compression, roller cam, internal balance job, oiling mods, 7500 rpm, sure 500 is doable.
    Buickboy69 likes this.
  3. alec296

    alec296 i need another buick

    Finishline Motorsports built a stroker with 8.5ish compression that made 440 hp before boost. So you could probably get close with the right setup. But boost would be easier.
    Buickboy69 likes this.
  4. Dano

    Dano Platinum Level Contributor

    Stroker with the NASCAR rods & 10% more cubes as Derrick is always talking would have to help. Guy on FB (also a board member, but said he hasn't been on here for a while - Trying to prod him) ran 12.4 first time out with his new engine w/ traction issues and 3.42's w/28" tires & TH350 & a pretty high stall (barely hit 3rd before the traps) so seems like he'd have to be in the 425 HP (?) range (non stroker) and he said it was built primarily to be a street car (Sean, did you see that on Eric's page?). He didn't post the build per se, but answered a bunch of questions and posted his Scotty Brown cam card. Car sounded strong. It might take the Alum. heads to hit 500 HP, but maybe not.
    Buickboy69 likes this.
  5. Buickboy69

    Buickboy69 Active Member

    Just testing the waters with this post more than anything but figured if these chevy ls motor could do it a buick 350 could do it.
  6. Fox's Den

    Fox's Den 27 years of racing the same 355 Buick motor

    I had 395 @ 6 grand on a engine dyno. There are a lot better parts now what's a 100 more.
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  7. dr

    dr Well-Known Member

    If i ever get time to work on my 62 Skylark this is the thread I need!!!!!!!!!!!!
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  8. Mark Demko

    Mark Demko Well-Known Member

    Well the 5.3 LS is about 327 cubes
    350 Buick is 350 cubes
    You take engine management out of the equation, which really has nothing to do with power, and EVERYTHING to do with emissions, economy and drivability, whats left?
    And sooooon I/we hope, the 350 Buick will have a great set available to us:D
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  9. Fox's Den

    Fox's Den 27 years of racing the same 355 Buick motor

    If you keep playing with the rod clearance making it perfect the heads will be out about the time you put that bad boy back together.
    you could be the first one to test these bad boys.

    The question is would you guys want those heads with or without the springs and valves in or get them bare and do your thing.
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  10. Golden Oldie 65

    Golden Oldie 65 Well-Known Member

    When did TA start development on these heads? 10 years ago? 11 years? More? I understand that these things take a lot of time and devotion and in no way is it my intention to bash them for it but some of us are going to get too old to make use of them by the time they become available to us. I'm all for rooting for the underdog but if you want 500hp, go with a big block.
    Buickboy69 likes this.
  11. UNDERDOG350

    UNDERDOG350 350 Buick purestock racer

    If you think that these new heads are going to flow like LS heads you will be very disappointed. Look into the 350 intake port, then look into an LS port. If you were air, which path would you choose as the least resistance to get into the combustion chamber?
    If it were possible to adapt LS heads to a 350 Buick block then you could achieve LS like power. But you would not be able to use stock SBB intake, exhaust, and rockers as most responses seem to want to do. If you understand my point, I'm saying by working to the constraints of stock components for cost (or other) considerations you are compromising what new heads could be.
    Buickboy69 likes this.
  12. wovenweb

    wovenweb Platinum Level Contributor

    If I were air, I would choose not to enter the engine at all. I'm just going to get dirty if I go in there.
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  13. Jim Weise

    Jim Weise EFI/DIS 482

    :D and hot..

    To the OP... Possible.. it all depends on how the engine responds to the new heads. We will need to pick up at least 60HP over a ported iron head.. if we can get that, then might be able to build one with decent street manners with a moderately sized HYD roller.
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  14. dr

    dr Well-Known Member

    Novice/Ignorant Question:
    If you had aluminum heads or good ported iron heads combined with a Turbo or Nitrous is 500hp attainable and street-able with pump gas?
    Can the block take it? Would it need a girdle?
    Buickboy69 likes this.
  15. dr

    dr Well-Known Member

    I'm starting to get interested in the sbb after 30 years with the big block. I was unaware the aluminum heads had been in the planning stages for that long.
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  16. alec296

    alec296 i need another buick

    Block is fine for 500 on boost. Although e85 would be the best choice yes you can get premium fuel to run on on boost at 500. But tune has to be really good. Detontation under boost isn’t going to leave much left of engine if it lets go.
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  17. Dano

    Dano Platinum Level Contributor

    I'm no expert in casting, but wouldn't it be possible and if so, advisable to optimize the flow on the prototypes and then cast them to a net shape as to not really need add'l porting? If so, then I'd rather buy them ready to go which is how I bought my ported big valve iron 350 heads back in the early 90's although IIRC, I still wound up disassembling them anyway to mill more material off & dial in the SCR, lap the valves, and check the heights, etc. One mistake I made on that engine was using an original, although NOM "SP" block which precluded milling/squaring the deck.

    On the other hand, if only a near net port shape is possible and someone besides TA is going to set up a CNC porting routine, then bare. If TA offers the ported, CC'd version, then would probably opt for a complete assembled head.
    Buickboy69 likes this.
  18. Buickboy69

    Buickboy69 Active Member

    I think it might be doable on 93pump I ran 9.96 1/8 on a ported 2bbl intake and heads stock bottom end then went to a sp3 intake with a 750 quick fuel and lunati 256/262 went 9.20 stock bottom end all 1/8 mile passes but I feel like there's a lot left in it cause I haven't changed my converter or gears
  19. Buickboy69

    Buickboy69 Active Member

    My goal is low 7s in the 1/8 on pump so 500hp should get me close.
  20. Fox's Den

    Fox's Den 27 years of racing the same 355 Buick motor

    I ran 11.81@114 at the old Dragway 42 in 2005 with a 125 shot of nitrous, that is 500 hp on a 350, still together, still running.
    sriley531 and 300sbb_overkill like this.

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