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  1. #11
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    subscribing...
    1995 Z28 - disfunctional now, perhaps insane after its "treatment"
    1998 Formula WS6 -Heads, cam, intake, bolt ons 441RWHP


  2. #12
    "The Rock"


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    Popo
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    1996 Impala with the heart of the old camaro. 1993 Corvette..
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    Quote Originally Posted by CALL911 View Post
    subscribing...


    Our BIG MOMENT @ the 2012 LTXshootout

    http://www.facebook.com/photo.php?v=521756391174175

    1996 Camaro Z28: RIP 09/25/2016

    1994 Trans Am GT: SOLD 05/2017

    1985/1996GS clone: SOLD

    1996 Impala SS H/C, LT, with true dual exhaust, 4.10s, lowered, with CPT trans, many cosmetic mods, and a whole lot more to come...

    2002 Caddilac EscaladeL CAI, lowered, 6.0 , AWD..





  3. #13
    "The Rock"


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    Popo
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    1996 Impala with the heart of the old camaro. 1993 Corvette..
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    Quote Originally Posted by popo8 View Post

    Conversing with myself but here goes....

    Spoke with AFR today.... he advised me the 227s will give me lots of room to grow, and I wont be using them to their full potential, however he insisted that even with my current set up those heads and that Intake will dramatically increase my power....

    As for the shaft mounted rockers that the guy I bought the other stuff from was selling...... they are not correct for those heads. They are non-eliminator, and my heads are the eliminators....


    Our BIG MOMENT @ the 2012 LTXshootout

    http://www.facebook.com/photo.php?v=521756391174175

    1996 Camaro Z28: RIP 09/25/2016

    1994 Trans Am GT: SOLD 05/2017

    1985/1996GS clone: SOLD

    1996 Impala SS H/C, LT, with true dual exhaust, 4.10s, lowered, with CPT trans, many cosmetic mods, and a whole lot more to come...

    2002 Caddilac EscaladeL CAI, lowered, 6.0 , AWD..





  4. #14
    Needs Driver Mod


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    Athens, GA
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    Ill converse with you but cant give any advice. lol. Car should haul though with those AFRs. What did your car trap in the 1/4 mile before it broke?
    1997 Trans am- M6- Ebay Longtubes, Summit X pipe with Magnaflows, CAI, Adj LCAs with relocation brackets, Comp engineering shocks, Competition stage 2 clutch.

  5. #15

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    I have the same heads but mine are the RACE ported versions, POPO's are the COMP ported. The COMP ported flow more. They have an additional pass made in the cnc process. They are as good as it gets.

    I run Jesel shaft rockers, they were just over $1000 at summitracing.

    I run aftermarket proform valve covers, and had to remove the baffles to get them to fit. The baffles were screwed into the underside so it took 2 minutes to modify them.

    If you run shaft rockers, you cannot run head studs on the top row. I have an ARP head stud kit, but had to purchase a full set of GMPP head bolts and use the long bolts for the top row. The studs stuck up too far and interfered with the shaft assembly. The head bolts sat flush and gave enough clearance for the shaft assembly. When using ARP head studs, use the teflon tape to seal them and a dab of liquid sealant. It should have resistance when you are inserting the stud. If it goes in relatively easy, you didn't use enough sealant, and it will probably leak.

    AFR sells a set of rockers with an offset pushrod cup for use on 227cc heads. The rockers are around $300 iirc. You would want to run a girdle as well if you are running a big cam. Girdles will run $200-$300. So you can spend around $600 for stud rockers/girdle or $1000 for shaft rockers, whichever is your choice.

    When installing the heads I had to grind down the middle washer to fit it between the valve springs. I also had to trim the edges off of the nut that goes onto the stud for the same hole. If you google it, you will see it is a common step to install these heads. It took me 5 minutes with a grinder.

    I run pacesetter 1 3/4 headers and was fearing that i'd need to step up to a 1 7/8ths header to work. Not true. The 1 3/4 headers match up very well to the exhaust port, so far no issues whatsoever.
    '94 coupe, 10.15 at 133.65 414" LT1, 4500 stall, n/a, pump gas, mufflers, street trim
    '15 Z/28, Red Hot, AC, Autocross beast

  6. #16
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    Larry, did you ever find out what exactly was wrong with your car?
    1995 Z28 - disfunctional now, perhaps insane after its "treatment"
    1998 Formula WS6 -Heads, cam, intake, bolt ons 441RWHP


  7. #17
    "The Rock"


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    Jul 2009
    Name
    Popo
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    1996 Impala with the heart of the old camaro. 1993 Corvette..
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    Shillington, Pennsylvania, United States
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    Quote Originally Posted by IronOutlaw View Post
    Ill converse with you but cant give any advice. lol. Car should haul though with those AFRs. What did your car trap in the 1/4 mile before it broke?
    Never raced it.... my current set up wont fully use those heads, but I will have LOTS of room to grow....


    Our BIG MOMENT @ the 2012 LTXshootout

    http://www.facebook.com/photo.php?v=521756391174175

    1996 Camaro Z28: RIP 09/25/2016

    1994 Trans Am GT: SOLD 05/2017

    1985/1996GS clone: SOLD

    1996 Impala SS H/C, LT, with true dual exhaust, 4.10s, lowered, with CPT trans, many cosmetic mods, and a whole lot more to come...

    2002 Caddilac EscaladeL CAI, lowered, 6.0 , AWD..





  8. #18
    "The Rock"


    Status
    Offline
    Join Date
    Jul 2009
    Name
    Popo
    Vehicle
    1996 Impala with the heart of the old camaro. 1993 Corvette..
    Location
    Shillington, Pennsylvania, United States
    Posts
    61,345

    Default

    Quote Originally Posted by joelster View Post
    I have the same heads but mine are the RACE ported versions, POPO's are the COMP ported. The COMP ported flow more. They have an additional pass made in the cnc process. They are as good as it gets.

    I run Jesel shaft rockers, they were just over $1000 at summitracing.

    I run aftermarket proform valve covers, and had to remove the baffles to get them to fit. The baffles were screwed into the underside so it took 2 minutes to modify them.

    If you run shaft rockers, you cannot run head studs on the top row. I have an ARP head stud kit, but had to purchase a full set of GMPP head bolts and use the long bolts for the top row. The studs stuck up too far and interfered with the shaft assembly. The head bolts sat flush and gave enough clearance for the shaft assembly. When using ARP head studs, use the teflon tape to seal them and a dab of liquid sealant. It should have resistance when you are inserting the stud. If it goes in relatively easy, you didn't use enough sealant, and it will probably leak.

    AFR sells a set of rockers with an offset pushrod cup for use on 227cc heads. The rockers are around $300 iirc. You would want to run a girdle as well if you are running a big cam. Girdles will run $200-$300. So you can spend around $600 for stud rockers/girdle or $1000 for shaft rockers, whichever is your choice.

    When installing the heads I had to grind down the middle washer to fit it between the valve springs. I also had to trim the edges off of the nut that goes onto the stud for the same hole. If you google it, you will see it is a common step to install these heads. It took me 5 minutes with a grinder.

    I run pacesetter 1 3/4 headers and was fearing that i'd need to step up to a 1 7/8ths header to work. Not true. The 1 3/4 headers match up very well to the exhaust port, so far no issues whatsoever.


    Wow man, thank you for all the heads up..... I have to run the shaft mounted rockers because of how much street use it sees.... AFR recomends that as the only way to go for street use........


    Our BIG MOMENT @ the 2012 LTXshootout

    http://www.facebook.com/photo.php?v=521756391174175

    1996 Camaro Z28: RIP 09/25/2016

    1994 Trans Am GT: SOLD 05/2017

    1985/1996GS clone: SOLD

    1996 Impala SS H/C, LT, with true dual exhaust, 4.10s, lowered, with CPT trans, many cosmetic mods, and a whole lot more to come...

    2002 Caddilac EscaladeL CAI, lowered, 6.0 , AWD..





  9. #19
    "The Rock"


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    Join Date
    Jul 2009
    Name
    Popo
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    1996 Impala with the heart of the old camaro. 1993 Corvette..
    Location
    Shillington, Pennsylvania, United States
    Posts
    61,345

    Default

    Quote Originally Posted by CALL911 View Post
    Larry, did you ever find out what exactly was wrong with your car?
    Busted valve spring for sure....

    Most prob a bent valve.....

    Not sure if any damage to the piston till we pull the heads.....


    Our BIG MOMENT @ the 2012 LTXshootout

    http://www.facebook.com/photo.php?v=521756391174175

    1996 Camaro Z28: RIP 09/25/2016

    1994 Trans Am GT: SOLD 05/2017

    1985/1996GS clone: SOLD

    1996 Impala SS H/C, LT, with true dual exhaust, 4.10s, lowered, with CPT trans, many cosmetic mods, and a whole lot more to come...

    2002 Caddilac EscaladeL CAI, lowered, 6.0 , AWD..





  10. #20

    Default

    If you run shaft rockers you can sell the rocker studs and guideplates since they won't be used.
    '94 coupe, 10.15 at 133.65 414" LT1, 4500 stall, n/a, pump gas, mufflers, street trim
    '15 Z/28, Red Hot, AC, Autocross beast

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