Anyone know the benefit of porting an LY6 engine's heads ? ?

Discussion in 'High Tech Retrofits' started by 70 gsconvt, Jun 5, 2011.

  1. RICARDO1969

    RICARDO1969 Veteran Member Lifetime Gold Member

    Messages:
    2,086
    Likes Received:
    3
    Joined:
    Oct 14, 2007
    Location:
    Waukesha WI
  2. JAMMINJ007

    JAMMINJ007 Veteran Member

    Messages:
    397
    Likes Received:
    1
    Joined:
    Dec 27, 2005
    Location:
    Houston, Tx
    L92
    How about one this one? It is the one I am leaning towards;)
    LS 230/246
    Pat G is a good guy, but he is really conservative on his cams.
     
  3. 70 gsconvt

    70 gsconvt Veteran Member

    Messages:
    1,095
    Likes Received:
    0
    Joined:
    Sep 30, 2009
    Location:
    Wadsworth, OH
    I saw in Super Chevy magazine that they made 700 hp with cathedral port heads from TFS. Now it was a 454 with a FAST intake, etc. But still, sounds like more than enough hp is capable with cathedral port cnc heads. Maybe I'll start taking a hard look at some.
     
  4. JAMMINJ007

    JAMMINJ007 Veteran Member

    Messages:
    397
    Likes Received:
    1
    Joined:
    Dec 27, 2005
    Location:
    Houston, Tx
    Trickflow are the best heads on the market. If you are going to spend that kind of coin you may as well build a stroker, but you can easily achieve 11 sec car with just milling the heads and a cam in an LY6. Keep in mind that 700hp is going to cost you at least 15k. :screwup:
    In your OP you were asking what would get you an 11 sec. car now it is on a whole other level. Now throw in a 700 hp 454 with after market heads? :screwup: Its your money you can go as fast as your wallet allows;)
     
  5. 70 gsconvt

    70 gsconvt Veteran Member

    Messages:
    1,095
    Likes Received:
    0
    Joined:
    Sep 30, 2009
    Location:
    Wadsworth, OH
    I was just throwing that 700 hp engine out there as an example of what could be done with the cathedral heads. I have no intention of going that far. I just would have a hard time believeing that you can have that much on tap and be very streetable.
     
  6. JAMMINJ007

    JAMMINJ007 Veteran Member

    Messages:
    397
    Likes Received:
    1
    Joined:
    Dec 27, 2005
    Location:
    Houston, Tx
    My friend Chuck's 02 Camaro makes 914rwhp and is street driven has AC and stereo still in it. His other Camaro is @ Kentucky turbo and will make over 1400 rwhp and still have AC and be street driven also. So yeah it can be done. LS motors make big power.
     
  7. TX78Z28

    TX78Z28 Veteran Member

    Messages:
    312
    Likes Received:
    0
    Joined:
    Mar 29, 2006
    Location:
    Dallas, TX
    LSx motors are a whole 'nother animal. They can make big power yet still be very tame. The cathedral ports will make plenty of power... tho the lure of the flow numbers of the L92 heads caused me to purchase this LY6 when I found it. That and I hope someday to upgrade to an LSX block with 427ci and felt these heads would be a good match.

    I have an '09 LY6 6.0L crate motor (bought new) in my '68 C-15. These motors come with the L92 heads plus VVT and have like 9.65:1 cr. I removed the VVT and efi, and added a Comp LSr 223/231 @ .050 with .610/.617 lift on a 112 LSA cam, .650 dual springs w/titanium retainers and locks plus some chromemoly p-rods. I guess I should also mention....it runs a carb...a Holley 750 HP Street on a GMPP LSX/LS3 dual plane manifold for L92/LS3 heads and has a MSD 6LS-2 box firing the stock coil packs. With the MSD box, Dynatech 1 7/8" headers, Comp cam/springs, and the intake/carb setup and running e-fans....motor should be making well over 500hp at the crank. Truck will putt putt around town just fine.....but nail it at anything below about 50mph and it can't find traction. :lol:

    Its not a 2nd gen....but its what replaced my 2nd gen....for now anyway. With my bad back it was getting too hard to get into and out of. With the truck lowered 4" front and 5" rear...its about perfect for ease of entry/exit.

    [​IMG]

    [​IMG]

    [​IMG]
     
  8. RICARDO1969

    RICARDO1969 Veteran Member Lifetime Gold Member

    Messages:
    2,086
    Likes Received:
    3
    Joined:
    Oct 14, 2007
    Location:
    Waukesha WI
    very nice!
     
  9. TX78Z28

    TX78Z28 Veteran Member

    Messages:
    312
    Likes Received:
    0
    Joined:
    Mar 29, 2006
    Location:
    Dallas, TX
    Thanks!
     
  10. Aceshigh

    Aceshigh Veteran Member Lifetime Gold Member

    Messages:
    26,757
    Likes Received:
    6
    Joined:
    Apr 9, 2001
    Location:
    Boondocks
    Last edited: Jun 10, 2011

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.