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prc heads?

This is a discussion on prc heads? within the Internal Engine forums, part of the LSx Technical Help Section category; anyone using or know someone that is using the prc heads from texasspeed...

  1. #1
    N/A nitrously aspirated stangslayer98's Avatar
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    prc heads?

    anyone using or know someone that is using the prc heads from texasspeed

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    Senior Member INMY01TA's Avatar
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    I know a bunch of people using them. Best budget heads out there imo. I believe they are coming out with their own castings too.

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    JUISSED Midnight02's Avatar
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    I have their Stage 2.5 5.3L heads milled to 60cc. For a budget head I am certainly pleased with the results. While the peak HP gains were nice, I was really looking to build a ton of power down low for the streets and I ended up with a torque monster. The peak TQ number on my recent dyno tune was 406, however by 2700 rpm I'm already over 350+ ft/lbs.

    Based on most of the numbers I've seen, it seems like the Stage 2.5 5.3 heads probably leave 10 - 20 additional horsepower on the table when compared to some of the more expensive top performers (AFR, TFS, ETP, etc.). Given that the heads were $1,032 shipped (I didn't need the springs, etc.) the gains I netted from them were well worth it.

    One word of caution, if you're looking to build an all-out track car, it would be wise to simply save up and go with the best. Those 10 - 20 rwhp will make a difference at the track if you're on a quest for lower ETs. For me, I simply wanted to pick up a nice gain from a budget head swap and then to put the rest into my N2O setup....hence, the PRC heads were a great fit.
    2002 Camaro SS M6, 2.5 PRC 5.3L heads, TFS 228/230 cam, FAST 92, bolt ons + a 10 lb bottle in the back.


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    N/A nitrously aspirated stangslayer98's Avatar
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    thanks for the info, im also in for the budget as opposed to lower et's, just looking for some decent gains over stock with a cam and then a dry shot of nitrous, hopefully it will be good for 450rwhp on a small shot

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    Gold Member BlwnCamaro's Avatar
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    Quote Originally Posted by stangslayer98 View Post
    thanks for the info, im also in for the budget as opposed to lower et's, just looking for some decent gains over stock with a cam and then a dry shot of nitrous, hopefully it will be good for 450rwhp on a small shot

    Yes those heads are very good imho. Although I wouldnt ever run a dryshot on an engine no matter what, its just a disaster waiting to happen. Give yourself the added insurance and cylinder cooling fuel of a wet shot even if its a small one and you will make way more power and safer.

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    N/A nitrously aspirated stangslayer98's Avatar
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    i have thought the dry is the safe route, i just didnt really want to mess with the fuel lines, and the dry shot is cake to install

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    Gold Member BlwnCamaro's Avatar
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    Quote Originally Posted by stangslayer98 View Post
    i have thought the dry is the safe route, i just didnt really want to mess with the fuel lines, and the dry shot is cake to install
    Wet is safer, fuel line you can just simply remove shrader valve on fuel rail and fuel line to nos solenoid just screws on right there. The problem with dry is you are relying on the cars fuel system to deliver extra fuel. It can easily lean out on dry shot even if everything is working good, and worst scenario you could have an injector get weak and lean a cylinder or if maf went out of range or malfunctioned it would be bye bye to motor. It leaves to many varaibles for failure on the table. With the wet you are getting more fuel to engine based off the simple opening and closing of aircraft grade solenoid that almost never fail. Way more power also.

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    I like mine. They are cut to a 59cc chamber size. My pistons are -2cc so I don't have to worry about the valves hitting the piston. Made a nice fat wide torque curve.
    TSP 347 SB, TSP Stage 2.5 PRC LS6, TSP MS4, Performabuilt Stage 2 4L60E, Yank PT4000, 4.11s, Fast 90/90, FTRA Cold air intake+all the free mods, Dynatech Supermaxx Exaust System, DMH Cutouts, Hooker Catback/FTRA Tips. Tuned by RPM/Garner NC. 11.28@119

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    stage 2.5 5.3 heads here

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    N/A nitrously aspirated stangslayer98's Avatar
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    have you been able to dyno after the install john

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    Quote Originally Posted by stangslayer98 View Post
    have you been able to dyno after the install john
    I'm an A4 and put down 435rwhp 407rwt
    mods: TSP stage 2.5 5.3 heads
    232/238 6xx 6xx 111+2 cam
    ported fast 90/90

  12. #12
    Make real real sure Johns00Z28's Avatar
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    Quote Originally Posted by john5632 View Post
    I'm an A4 and put down 435rwhp 407rwt
    mods: TSP stage 2.5 5.3 heads
    232/238 6xx 6xx 111+2 cam
    ported fast 90/90
    Those are nice numbers for an automatic. Did you do the heads/cam swap at the same time?

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    Quote Originally Posted by Johns00Z28 View Post
    Those are nice numbers for an automatic. Did you do the heads/cam swap at the same time?
    No first I was cammed with a tr224 with an ls6,and put down 349rwhp..Added a ported fast 90/90 and The tsp 5.3 heads,and when to 417rwhp..In feb.I Decided to go bigger with the custom Pat G cam I have now and put down 435rwhp 407rwt

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    Make real real sure Johns00Z28's Avatar
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    Quote Originally Posted by john5632 View Post
    No first I was cammed with a tr224 with an ls6,and put down 349rwhp..Added a ported fast 90/90 and The tsp 5.3 heads,and when to 417rwhp..In feb.I Decided to go bigger with the custom Pat G cam I have now and put down 435rwhp 407rwt

    That's cool. How drivable is your setup....is it a DD? When does your torque start to kick in?

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    I Like It Stroked 99Ls1fever's Avatar
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    Quote Originally Posted by INMY01TA View Post
    I know a bunch of people using them. Best budget heads out there imo. I believe they are coming out with their own castings too.
    Best budget head I.M.O. is Patriot Performance.... TSP isn't exactly budget

  16. #16
    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by 99Ls1fever View Post
    TSP isn't exactly budget
    How so???
    http://www.texas-speed.com/shop/item...id=84&catid=40
    $1,199 with the dual spring kit.
    https://www.patriot-performance.com/...&cat=36&page=1
    $1,195 with the dual spring kit.
    Wow, you save $4. (PRC outperforms tho)
    Last edited by INMY01TA; 07-06-2008 at 07:56 AM.

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    I Like It Stroked 99Ls1fever's Avatar
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    Quote Originally Posted by INMY01TA View Post
    . (PRC outperforms tho)
    Out performs my ass the flow sheet is worse than the patriot stage 3and they are 5.3 heads... Why the hell would you want to put them on a LS1 the intake runners are longer on the stage 3's too... poor argument..lol
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  18. #18
    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by 99Ls1fever View Post
    Out performs my ass the flow sheet is worse than the patriot stage 3and they are 5.3 heads... Why the hell would you want to put them on a LS1 the intake runners are longer on the stage 3's too... poor argument..lol
    Sorry. I never see the #s from Patriot. Read LS1 Tech, common knowledge there. I personally know guys who went 9 seconds with PRC stage 3s. What's your stroker run?

  19. #19
    I Like It Stroked 99Ls1fever's Avatar
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    Quote Originally Posted by INMY01TA View Post
    Sorry. I never see the #s from Patriot. Read LS1 Tech, common knowledge there. I personally know guys who went 9 seconds with PRC stage 3s. What's your stroker run?
    The patriot flow numbers for my heads at .600 lift were 321cfm and the stroker shoots nitrous so its not fully n/a but it runs 10's and it is a full street car and I am not a light guy... So I just have personal prefrence after running PRC'S before and having a valve drop after a spring cracked... So to say I hate PRC'S would be a VAST understatement!!!!

  20. #20
    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by 99Ls1fever View Post
    The patriot flow numbers for my heads at .600 lift were 321cfm and the stroker shoots nitrous so its not fully n/a but it runs 10's and it is a full street car and I am not a light guy... So I just have personal prefrence after running PRC'S before and having a valve drop after a spring cracked... So to say I hate PRC'S would be a VAST understatement!!!!
    What springs? PRC duals and Patriot duals are the same...

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