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228r cam 5.3 stage 2.5 heads

This is a discussion on 228r cam 5.3 stage 2.5 heads within the Internal Engine forums, part of the LSx Technical Help Section category; ok... if your gunna do boosting are you going to forged your internals if so... what you should do i ...

  1. #21
    Senior Member OnEbAdReDSS's Avatar
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    ok... if your gunna do boosting are you going to forged your internals if so... what you should do i pick up some LQ4 2001+ heads (they are the down graded LQ9 heads) and just port the runners and put a big bigger valves it will still be a daily driver it will just hold more boost and more HP!

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    were do you get them from? how big of a difference would it be with out the boost and if you had nine grand what would you do to your camaro to get the most power.

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    I get from experiance, my dad has been building crazy motor just from a head and cam swaps and porting and polishing. The info i have learned about this is a book called LS1/LS6 Performance they explain the difference between heads. As your qustion about without boost kinda slow because of the compression ratio. Now if you wanna get 600 to 700 i would do what i said plus some APR rod bolts, Low Compression pistons but beware that will change the geometry of the motor and how the LS was built.

    If i had 9 g's this is what i would do.

    Stroke the LS1 bigger bore put some deep dish pistons and forged rods, Fast 92/92 intake LT's TSP TD's, LQ4 heads copper head gasket ARP Complete Bolt Kit. Get the Twin Turbo kit (i can't remember the company) if all that should be around 700-800

    if you wanna go easier route go with a LQ9 Block from a Escalade, forged internals, P/P heads, Fast 92/92 if it fits, ARP Complete Bolt Kit, and TT the shit out of it... should be the same i think less money.. PM Me and we can talk through there and i can add more stuff to the equation

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    Quote Originally Posted by ksupersport02 View Post
    If your talking to me .. GTO.. I do apprec.. KD
    you said the 2001 and 2002 camaros came with the ls6 manifold so is it safe to say that i have the same manifold on my generation 3 ls1. also ...... do i need to get new injectors if i go with the larger manifold and TB.

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    Quote Originally Posted by stanksGTO View Post
    you said the 2001 and 2002 camaros came with the ls6 manifold so is it safe to say that i have the same manifold on my generation 3 ls1. also ...... do i need to get new injectors if i go with the larger manifold and TB.
    might double check to make sure you dont have the Ls2 manifold on your car. get the part number off of it and do a search to make sure. I am not 100% sure if the '04 GTO's had a 5.7 or 6.0 engine in them...

    also, your tuner would be able to let you know if you need to step up to larger injectors. you can upgrade those at anytime really. you dont want to go past 85-90% duty cycle. even with my setup, im still running stock injectors...

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    Senior Member Blown Interceptor's Avatar
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    Some good reading here, I am still up in the air if I want LS6 or 5.3L heads. I was under the impression that the 5.3 heads raise your compression a bit and that is what you want?
    Last edited by Blown Interceptor; 06-07-2008 at 08:20 AM.
    1999 Black Camaro SS

    Lid, Fast Toys, 3.90's, N20

    More to come!!!!

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    Quote Originally Posted by Blown Interceptor View Post
    Some good reading here, I am still up in the air if I want LS6 or 5.3L heads. I was under the impression that the 5.3 heads raise your compression a bit and that is what you want?
    you can achieve the same with Ls6 heads. people seem to forget that. i have 59cc Ls6 heads, those are smaller than stock 'cc' sizes to help boost compression. my c/r is around 11.5:1...

    my heads are welded up to 59cc (as they are 6.0L truck heads), other heads you can have milled down and then manipulate the gasket thickness to achieve the same (compression) results as 5.3 heads...

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    Senior Member Blown Interceptor's Avatar
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    Quote Originally Posted by SSwt00SS View Post
    you can achieve the same with Ls6 heads. people seem to forget that. i have 59cc Ls6 heads, those are smaller than stock 'cc' sizes to help boost compression. my c/r is around 11.5:1...

    my heads are welded up to 59cc (as they are 6.0L truck heads), other heads you can have milled down and then manipulate the gasket thickness to achieve the same (compression) results as 5.3 heads...


    Do the LS6 heads flow better? I think Ed has the 5.3L Patriot Heads, but not sure?

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    Quote Originally Posted by SSwt00SS View Post
    might double check to make sure you dont have the Ls2 manifold on your car. get the part number off of it and do a search to make sure. I am not 100% sure if the '04 GTO's had a 5.7 or 6.0 engine in them...

    also, your tuner would be able to let you know if you need to step up to larger injectors. you can upgrade those at anytime really. you dont want to go past 85-90% duty cycle. even with my setup, im still running stock injectors...
    04 GTO's have the 5.7 ls1 but they come with the ls6 intake

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    Quote Originally Posted by mark21742 View Post
    04 GTO's have the 5.7 ls1 but they come with the ls6 intake
    thank you for the clarification...

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    Quote Originally Posted by Blown Interceptor View Post
    Some good reading here, I am still up in the air if I want LS6 or 5.3L heads. I was under the impression that the 5.3 heads raise your compression a bit and that is what you want?
    as SSwtooss that 5.3 can achieve the same if your going to just use stock 5.3 remember this stock 5.3 heads will raise your come to 10.9 to 1 without milling. If your milling the head .030 you will raise your come to 11.6 to 1 comp. But if your gunna do all that you HAVE to put bigger valves it is almost manditory to gain hp number otherwise just go with your own ls1 heads that you can port match or just go with the ls6 head. it was provin that ported ls1 head and a ls6 manifold out flowed ported ls6 head and a ls6 manifold! from .250 lift to .450 lift.

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    Quote Originally Posted by OnEbAdReDSS View Post
    as SSwtooss that 5.3 can achieve the same if your going to just use stock 5.3 remember this stock 5.3 heads will raise your come to 10.9 to 1 without milling. If your milling the head .030 you will raise your come to 11.6 to 1 comp. But if your gunna do all that you HAVE to put bigger valves it is almost manditory to gain hp number otherwise just go with your own ls1 heads that you can port match or just go with the ls6 head. it was provin that ported ls1 head and a ls6 manifold out flowed ported ls6 head and a ls6 manifold! from .250 lift to .450 lift.
    well tell me this.... im im going to buy heads that i dont plan on costomizing and i already have the ls6 manifold on my GTO ..... and im going with a 228R that has a 588 lift i believe, what head would be better to go with ls6 or 5.3

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    don't plan on customizing... LS6... 5.3 needs bigger valves.. the only difference is 5.3 has a smaller combustion chamber which you will get a high comp ratio and the ls6 head has bigger valves already on them and they have just a little bit bigger combustion chamber 5.3 i think is 59cc combustion chamber and ls6 is 65cc i could be mistaken i need to check my book for those number but if your not gunna customize you head then the LS6 will flow better

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    you can order ls6 heads @ 59cc...

    then you have the best of both worlds. lareger valves and a small 'cc' to help boost C/R...

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    yup yup that is right i was just saying just buying stock for stock heads

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    Quote Originally Posted by OnEbAdReDSS View Post
    yup yup that is right i was just saying just buying stock for stock heads
    ah, i follow you now...

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    what size cam would be best to run with the 5.3 heads

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    Quote Originally Posted by 2002chevycamaroz28 View Post
    what size cam would be best to run with the 5.3 heads
    whatever cam is best suited to meet the goals that you wish to achieve...

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    hey tell me what you think of this site and this set up http://www.superchevy.com/technical/...2_engines.html

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    who makes the best 5.3L heads

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