View Poll Results: Which heads to get?

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  • AFR Mongoose 76cc 205 bare $1900

    8 28.57%
  • AFR Mongoose 66cc 205 bare $1900

    8 28.57%
  • Patriot Predator 205 (2.05/1.60/59cc-72cc) 3.905-4.030 bore $1795

    4 14.29%
  • Some other brand like ET Performance or DART or other... $xxxx

    8 28.57%
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The Best Heads?!?

This is a discussion on The Best Heads?!? within the Internal Engine forums, part of the LSx Technical Help Section category; Looking at the best next performance boost, got about $2k to play with and i have determined with the help ...

  1. #1
    Senior Member NeeD4SpeeD's Avatar
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    The Best Heads?!?

    Looking at the best next performance boost, got about $2k to play with and i have determined with the help of my peeps at ls1.com lol that heads milled would be my next best option......

    Now which set of head so i get, most are leaning to AFR which is fine you get what you pay for you know, i guess the patriot predator just doesnt equal up but this is what i got..

    I HAVE:

    2002 Trans AM WS6 CE M6
    425RWHP 411RWTQ DYNO TUNED (Think my dyno shop messed up these numbers)

    Thunder Racing 230/236 .592/.602 111.5LSA Cam, Stock bottom end
    Fully upgraded valve terrain, ASP underdrive pully, LS2 Double roller timing chain,
    LS6 Intake, SLP LID, SLP smooth bellows, K&N filter, 10.5mm Accel Pro Race wires and NGK iridium sparks .5 gapped, Pacesetter headers with 3" mandrel bend X-pipe true dual exhaust (no cats), 4.10 rear stock 9bolt, Nitto 555dr 315/35/17R Street slicks, full BMR suspension except shocks, and a Hurst short throw shifter.

    Now with the heads which ones should i get and which will be better for my situation and net me the best all around performance??
    Last edited by NeeD4SpeeD; 04-17-2007 at 04:37 AM.

  2. #2
    Senior Member mrr23's Avatar
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    can't beat AFR heads, IMO.

    http://www.vincihiperformance.com/BE...CT%20PAGE.HTML
    vinci did a head only swap. completely stock car. swapped heads and picked up 37 rwhp with stock tuning.

  3. #3
    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by mrr23 View Post
    can't beat AFR heads, IMO.

    http://www.vincihiperformance.com/BE...CT%20PAGE.HTML
    vinci did a head only swap. completely stock car. swapped heads and picked up 37 rwhp with stock tuning.
    Wow...impressive...i gotta check out the link and see what they did...so with the heads and all my mods i should pick up extra ponies...nice

  4. #4
    Senior Member NeeD4SpeeD's Avatar
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    Is there any performance difference b/t the AFR 205 76cc or the AFR 205 66cc?

  5. #5
    Senior Member slims00ls1z28's Avatar
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    The 66's will give you a higher compression rate and in turn more hp. I dont remember what the stock chambers are but I'm sure they are less than 76 I could be wrong but I don't think so 76's are the norm on old SBC's. If I am right the 76's would be what you need to go boosted of some sort to lower the compression rate to prevent detonation. I'f you are going NA or nitrous get the 66's.

  6. #6
    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by slims00ls1z28 View Post
    The 66's will give you a higher compression rate and in turn more hp. I dont remember what the stock chambers are but I'm sure they are less than 76 I could be wrong but I don't think so 76's are the norm on old SBC's. If I am right the 76's would be what you need to go boosted of some sort to lower the compression rate to prevent detonation. I'f you are going NA or nitrous get the 66's.
    Well i am going to go FI but in the future not anytime soon....So i guess ill stick with the AFR 66cc unless someone has a good enough reason why another brand would be better im all ears?

  7. #7
    UberTapping Friction Pimp Anthracis's Avatar
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    AFR heads are great!

  8. #8
    Senior Member mrr23's Avatar
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    Quote Originally Posted by NeeD4SpeeD View Post
    Is there any performance difference b/t the AFR 205 76cc or the AFR 205 66cc?
    stock LS1 heads are 66cc. so, going to 76cc will reduce your compression and cost you power.

  9. #9
    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by mrr23 View Post
    stock LS1 heads are 66cc. so, going to 76cc will reduce your compression and cost you power.
    Aite so based on what everyone said i'll get the AFR mongoose 205CC 66CC and just have them milled....Sounds like power in my engine to me!!

  10. #10
    Senior Member NeeD4SpeeD's Avatar
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    SO THIS IS THE FINAL VOTE...I SHOULD GO WITH AFR 205cc 66cc Mongoose HEADS THAT WILL GIVE ME THE BEST PERFORMANCE RIGHT????

    After this im gunna order the heads so i wanna make sure im gettin the best before i sink $2k into it...

    thanks alot guys 4 all ur help!!

  11. #11
    Senior Member mrr23's Avatar
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    if you get them bare, that means you have to buy all the hardware. springs, valves, seals, locks, retainers, etc... but yes, get the 66cc and ,ill them to 63cc.
    Last edited by mrr23; 04-23-2007 at 07:57 PM.

  12. #12
    Senior Member Blown Interceptor's Avatar
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    I would call them and talk to someone there and tell them what you plan to do. They will give you the best options/heads are going to work.

  13. #13
    Member Huskerz1's Avatar
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    Quote Originally Posted by Blown Interceptor View Post
    I would call them and talk to someone there and tell them what you plan to do. They will give you the best options/heads are going to work.

    This good advice. Talk to your speed shop master mechanic. I wouldn't spend $2k based on an internet poll.

  14. #14
    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by Huskerz1 View Post
    This good advice. Talk to your speed shop master mechanic. I wouldn't spend $2k based on an internet poll.
    VERY TRUE....I will give him a call the only thing with him is he trys to sell me on his own set of heads sayin there better and all that but ill make sure i get my questions across lol thanks again guys!!

  15. #15
    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by mrr23 View Post
    if you get them bare, that means you have to buy all the hardware. springs, valves, seals, locks, retainers, etc... but yes, get the 66cc and ,ill them to 63cc.
    I have fully upgraded valveterain already, i did it when i did my cam install so im all set in that area so why spend the extra clams if i have it already..

  16. #16
    CAM mmmmmm... Toes's Avatar
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    the ls6 cnc from Texas speed have excellent numbers and good price as far as top heads i would go with the trickflows

  17. #17
    Member ProwlerZ's Avatar
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    Those are some huge numbers for Cam-only, I'll be interested in seeing what you put down after heads!
    She's baaaaaccccck...

    '02 Z/28 M6 Hardtop

  18. #18
    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by Toes View Post
    the ls6 cnc from Texas speed have excellent numbers and good price as far as top heads i would go with the trickflows
    I heard the thunder racing was good also but trickflow huh....Gotta look into that...

    Basically i dont care about the HP numbers i just want the MOST power thruout the powerband so i can get down the track the fastest....HP numbers are more for show i want 1/4 improvement!!!

  19. #19
    Senior Member NeeD4SpeeD's Avatar
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    Quote Originally Posted by ProwlerZ View Post
    Those are some huge numbers for Cam-only, I'll be interested in seeing what you put down after heads!
    Thanks man...and i didnt think thoes numbers were good lol im intrested in seeing what the heads do also....

  20. #20
    I Love High-Explosives! TheChad1371's Avatar
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    if i only had some extra cash money man id be buying heads, and cam...any suggestions for heads and cam for my 2000 ws6 all stock excect exhaust?

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