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Any HP estimate??

This is a discussion on Any HP estimate?? within the Firebird / WS6 forums, part of the Vehicle Specific category; Hey guys, im wondering how much HP i have, but cant afford a dyno right now...Anyone with similar mods have ...

  1. #1
    Member Liveforfunjim's Avatar
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    Maple Red Metalic (MRM)
    2000 TransAM WS7

    Any HP estimate??

    Hey guys, im wondering how much HP i have, but cant afford a dyno right now...Anyone with similar mods have any HP#s??


    Mods:
    SLP Lt,ORY,Magnaflow cat-back,K&N FIPK, Fast90/PTM90, Full suspension with SFCs.

    This is getting ordered next week (only 1 more paycheck to go!):
    http://texas-speed.com/shop/item.asp...d=204&catid=47


    I need an estimated HP fo the above....

    I also have a Zex HO wet kit currently set at 100shot but i dont need to know how much more that adds....

  2. #2
    NY Representative Vertiviper's Avatar
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    Red
    99 Trans Am, M6

    Quote Originally Posted by Liveforfunjim View Post
    Hey guys, im wondering how much HP i have, but cant afford a dyno right now...Anyone with similar mods have any HP#s??


    Mods:
    SLP Lt,ORY,Magnaflow cat-back,K&N FIPK, Fast90/PTM90, Full suspension with SFCs.

    This is getting ordered next week (only 1 more paycheck to go!):
    http://texas-speed.com/shop/item.asp...d=204&catid=47


    I need an estimated HP fo the above....

    I also have a Zex HO wet kit currently set at 100shot but i dont need to know how much more that adds....

    Since i don't know much about that h/c combo i'll tell u that u will be around 350-360rwhp without H/C

  3. #3
    Member sfletch2000's Avatar
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    86 Buick Grand National
    02 WS6-M6 407 RWHP

    I can't decide between those heads or PRC's LS6 heads without the h/c i'd say about 350 and with them installed i'd say at least 420 depending on what cam you go with. Check out my sig and you can see what kind of power i'm making with their 228r cam, i'm hoping to be at about 450RWHP with the heads.
    Pacesetter Headers- ORY
    Texas Speed 228R Cam/Moly Pushrods/918 Springs
    MTI LID
    Slp Under Drive Pulley
    Texas Speeds Rumbler Catback
    SFC's, Lakewood LCA's
    Koni SA 4/3, Strano Springs
    Dyno Tune
    LS7 Clutch, Nitto DR's
    407 RWHP 377 Ft./lbs.

  4. #4
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    I personally would go with hogged out LS6 heads as opposed to the 5.3l heads. the 5.3l heads are good too but most guys get those when going forced induction as the 5.3l head is going to lower your compression.....I agree with said above I would say you are around 350-360 now. with ported heads and a cam in the mid 230 duration with healthy lift I would say you will be in the 450-470 range considering you have the 90/90 combo. I hope you already have a stronger rear end.
    1999 T/A WS6 Black -------SOLD
    05 mustang Roush sport;
    DOB manifold, m122 SC, 47lb injectors, gt500 TB, roush TVS CAI, Detroit rocker SC grind camshafts, Mac LTs, off road x, roush off road mufflers, roush short throw shifter, kenne bell BAP, Brenspeed 93 octane tune. 479rwhp 436ftlbs SAE.

  5. #5
    Member sfletch2000's Avatar
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    86 Buick Grand National
    02 WS6-M6 407 RWHP

    Quote Originally Posted by Wheeler99WS6 View Post
    I personally would go with hogged out LS6 heads as opposed to the 5.3l heads. the 5.3l heads are good too but most guys get those when going forced induction as the 5.3l head is going to lower your compression.....
    I was under the impression that those heads raised your compression not lowered it.

  6. #6
    Senior Member Wheeler99WS6's Avatar
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    black, 05 Roush
    black, 99 T/A WS.6

    Quote Originally Posted by sfletch2000 View Post
    I was under the impression that those heads raised your compression not lowered it.
    You might be right. I cant remember honestly as I have never really been interested in forced induction. I just remember alot of FI guys using those heads. I love the sound of a N/A car personally.

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