Any motor guy's with info on Big Block LS7 454

Discussion in 'Engine Topic' started by old zeder, Feb 22, 2007.

  1. old zeder

    old zeder Veteran Member

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    Feb 21, 2007
    Guelph Ont. Canada
    Hi i am looking for any persons or writen info on Gen. IV LS7-454 engines that can give me the specs on the factory parts and rated HP they produce

    Thanks
     
  2. pdq67

    pdq67 BANNED

    10,496
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    Jul 26, 2001
    Columbia, MO, USA
    It was still-born AND never offered in a vehicle for sale by GM b/c it was too much!!

    About 500+ hp for starters!!

    Just look at the 454 LS7 as a stroked 427 L-88!!!

    Same spec's if I remember right except for the stroke..

    pdq67

    PS., and an L-88 with no more than just an uncorked set of headers on her will make like 540 or so hp!!!

    So figure the LS7 at 600+hp or so!!!
     
  3. ZS10

    ZS10 Moderator Staff Member Lifetime Gold Member

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    Jan 18, 2003
    BC, Canada
  4. old zeder

    old zeder Veteran Member

    1,037
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    Feb 21, 2007
    Guelph Ont. Canada
    LS7 454 Power

    Thanks for the info, the person that sold me the engine said with my setup
    i should be around 575 + honest HP, but this thing realy pulls when you drop back into 4th on the highway, and with 115 oct. race fuel it's hard to control

    Have to learn to Drive all over again

    Thanks
     
  5. 79ZED

    79ZED Veteran Member

    3,062
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    Jan 31, 2000
    Nanaimo, B.C., Canada
    Just to add: the LS-7 used the ZL-1 camshaft, not the "smaller" L-88.

    John
     
  6. old zeder

    old zeder Veteran Member

    1,037
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    Feb 21, 2007
    Guelph Ont. Canada
    Thanks for the info, the mech. cam that i have has a duration intake/exhaust of 242 & lifter intake/exhaust of 520 still seem to have enough vaccum to run power brakes & steering.
     
  7. BlownBigBlock

    BlownBigBlock Veteran Member Lifetime Gold Member

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    Mar 2, 2000
    Carlisle PA
    I essentially built one for my vette. I was able to get a hold of a factory ZL-1 grind camshaft. With a M22 and a 4.11 rear, it was quite fun to drive. Oh, in regards to what "old zeder" said I had roughly 2 inches of vacuum. I had to install a vacuum pump to get the headlights to come up, along with wiper door. The cam is gonna be the most difficult to get since GM isn't producing it anymore, have seen them on Ebay now and then. TRW still makes the pistons, 4 bolt block, good crank, and r-port heads, everything else is still available.

    Fun setup though.. :) One of the last pics I have of it..

    [​IMG]
     
    Last edited: Feb 23, 2007
  8. ZS10

    ZS10 Moderator Staff Member Lifetime Gold Member

    12,165
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    Jan 18, 2003
    BC, Canada
  9. pdq67

    pdq67 BANNED

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    Jul 26, 2001
    Columbia, MO, USA
    Sounds like you only have the LS-6 solid cam in yours.

    Are you positive it is an LS-7??

    I ask b/c it should be right at 12 to 1 CR. or maybe a schosh more. The LS-6 is only 11 to 1 CR.

    pdq67
     
    Last edited: Feb 23, 2007
  10. Marv D

    Marv D Veteran Member Lifetime Gold Member

    Blown,, that makes me sick,,,, I had a 68, T top, same blue, Mako Phase III body package, fenderwells, stubby sidepipes, (sush don't tell Bob I ever owned a bigblock, but ) 427, 4spd,,, what makes me sick is I sold it in 1973 for $2250 (and no there are no missing zero's in that number) Every time I see a Vette with the fin on the back I get weak in the knees. I would kill to have the car back at ANY price now!! I'm sure you know what I mean :whine: :whine: :whine:
     

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