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  1. #1
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    Default How much to hardbloc

    I'm going to be hardblocking my engine and I'm wondering on how much you can do and still be streetable? 1/2? 3/4? Im Going to push some good amount of boost and I don't think the weak block can take it so I'm going to fill it. Another option
    Has anyone converted a sbc block into a lt1 block?
    normal twin turbo 383 lt1, th400 with brake and 9" rear

  2. #2
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    Default

    Quote Originally Posted by tt383lt1 View Post
    I'm going to be hardblocking my engine and I'm wondering on how much you can do and still be streetable? 1/2? 3/4? Im Going to push some good amount of boost and I don't think the weak block can take it so I'm going to fill it. Another option
    Has anyone converted a sbc block into a lt1 block?
    Ellwein would be the man to ask. give him a call and he will tell you. He was doing a half fill when we were there on a swedish guys 1200hp lt1 block that was to be streetable.

    a handful of sbc converted to lt1's have been done, be ready to spend a TON of money.

    how much boost are you shooting for? more than one person is at 1000+whp on a factory block. Tick is at like 1300whp on methanol on a factory lt1 block. they are running a 355 though (less side loading)
    2016 Camaro 1SS - Gotta stay LTJuan

    1996 Impala SS T56 - Le2 H/C, SBE, T56 swap

    The wrench for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ P600B/ CPT Pro Race/Pro Torque 3200

  3. #3
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    Default

    Money inst really a issue. I have allot of buddies with really nice lsx and BBC engines. And I want to keep the lt1. I'm switching to a Haltec 2500 ecu. But I ran 32 psi on a good tune. I changed some things. And thinking on returning it right now and figure I just pull it apart instead and start my build But How and who will do the sbc conversion.
    normal twin turbo 383 lt1, th400 with brake and 9" rear

  4. #4

    Default

    Subscribing. I’m curious about the sbc conversion myself. As well as the block fill. Isn’t one of the negatives about filling is that once filled, you can’t rebuild with that block?

  5. #5
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    Default

    Quote Originally Posted by tt383lt1 View Post
    Money inst really a issue. I have allot of buddies with really nice lsx and BBC engines. And I want to keep the lt1. I'm switching to a Haltec 2500 ecu. But I ran 32 psi on a good tune. I changed some things. And thinking on returning it right now and figure I just pull it apart instead and start my build But How and who will do the sbc conversion.
    If money isn't an issue, you should reach out to Jeff Green and see if can help you go to a billet block

    Sent from my SM-G955U using Tapatalk
    Same as everybody else...350 small block, double hump heads, 3/4 cam

  6. #6
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    Quote Originally Posted by Evaporate View Post
    Subscribing. Iím curious about the sbc conversion myself. As well as the block fill. Isnít one of the negatives about filling is that once filled, you canít rebuild with that block?
    never heard that before. I don't see why it couldnt be bored and honed

    Sent from my SM-N950U using Tapatalk
    2016 Camaro 1SS - Gotta stay LTJuan

    1996 Impala SS T56 - Le2 H/C, SBE, T56 swap

    The wrench for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ P600B/ CPT Pro Race/Pro Torque 3200

  7. #7
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    Mike Storm "Stormy"
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    Default

    Yeah billet is the way to go.



    1995 Trans Am - CAI - TB coolant bypass - Performance Muffler - Poly mounts - stock LT1/A4 - 13.3 1/4 - 1.9 60 foot , driven daily. .

  8. #8
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    Quote Originally Posted by SSlowBoat View Post
    never heard that before. I don't see why it couldnt be bored and honed

    Sent from my SM-N950U using Tapatalk
    Don't you have to hone after?



    1995 Trans Am - CAI - TB coolant bypass - Performance Muffler - Poly mounts - stock LT1/A4 - 13.3 1/4 - 1.9 60 foot , driven daily. .

  9. #9

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    Best have a very good oil cooler
    Correlation does not imply causation.

    Una salus victis nullam sperare salutem

  10. #10
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    Default

    FWIW -- I had a BB Chevy Nova that we filled back in the day that I drove on the street. We left about one inch below the deck and had no issues with it over heating. But as Mercy stated, it raised the oil temp about 20 degrees driving around.


    An LT1 should not be as bad. If under 900 HP I wouldn't bother, if over then you should.

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