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Horsepower Estimate?

This is a discussion on Horsepower Estimate? within the Firebird / WS6 forums, part of the Vehicle Specific category; Hey, I was just wondering what kind of gains I should see from a Heads and Cam Package. I believe ...

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    Preferred Member CWW17's Avatar
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    Horsepower Estimate?

    Hey, I was just wondering what kind of gains I should see from a Heads and Cam Package.

    I believe the heads are Patriot Stage II's and the cam is a 228. I am also getting a forged bottom end, and all the supporting mods to the engine.

    On the listed mods I made 326rwhp/335rwtq on a Mustang Dyno at Straightline Performance in New Lenox, IL.

    Mod List:
    - SLP Lid, K&N Filter, Smooth Bellow
    - Ported Throttle Body
    - LS6 Intake
    - Fast Toys Ram Air
    - 180 Thermostat
    - Pacesetter LT Headers + Off-Road Y-Pipe
    - Magnaflow Cat-Back
    - Strange 3.73's
    - Yank 3600 Stall
    - Free Mods

    Do you think I'll break the 400rwhp barrier with the H/C and forged internals package? Thanks in advance!
    Last edited by CWW17; 07-08-2008 at 09:44 PM.

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    pewter
    2001 z28 lingenfelter 383

    im surprised your numbers are that low as u sit now!!! typically u should have no problem breaking 400 with that set up.....should be a DRAMATIC difference....youll love it

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    Preferred Member CWW17's Avatar
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    Yeah, I was pretty disappointed with where I stood after that tune. I was thinking in the 340/350rwhp range, but the car ran great and felt really strong. However, I do think some of that disappointment can be attributed to Dynojets and people posting inflated numbers on here.
    Last edited by CWW17; 07-08-2008 at 09:55 PM.

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    Quote Originally Posted by CWW17 View Post
    Yeah, I was pretty disappointed with where I stood after that tune. I was thinking in the 340/350rwhp range, but the car ran great and felt really strong. However, I do think some of that disappointment can be attributed to Dynojets and people posting inflated numbers on here.
    yeah definitly......LPE only put my car at 395 rwhp 399 rwtq when they let it loose to the previous owner acording to the dyno...... no headers though...i think long tubes will put me in the 430 range.....car also had 0 miles on it at that dyno.....the real test on the road puts ls3 c6's and c5z06s in there place

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    Preferred Member CWW17's Avatar
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    I feel like there is something bottle-necking the whole thing... Maybe my tranny?

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    🤔 11s. blackbirdbrain89's Avatar
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    wow thats low.. i made 341 wrhp and 351ft lbs of tq im my 00 t/a with magnaflow cat back slp lid and bellow with all the free mods o i have to add that 12.5lb flywheel

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    Slow'er'Ass Mr. Luos's Avatar
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    Numbers are currently great for a stalled automatic on a mustang dyno.


    Look for 380-420RWHP once the heads and cam are on. On that same dyno. Depends on how loose the stall is.

    That said, you will outrun 440RWHP M6 cars at the track no problem. Plenty there for mid 11's and better.
    2008 Trailblazer SS
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    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

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    Preferred Member CWW17's Avatar
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    Awesome! Thats what I was hoping to hear! Thanks Luos

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    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by tonyjnjz View Post
    yeah definitly......LPE only put my car at 395 rwhp 399 rwtq when they let it loose to the previous owner acording to the dyno...... no headers though...i think long tubes will put me in the 430 range.....car also had 0 miles on it at that dyno.....the real test on the road puts ls3 c6's and c5z06s in there place
    35 rwhp with headers? if you get that let me know what headers. 20rwhp would be nice maybe even 30

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
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    fack you luos..you beat me to it..i was going to say that those numbers are nice behind a stall

  11. #11
    rapter34
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    If your going to forge the bottom end why dont you just get a stroker kit.

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    Preferred Member CWW17's Avatar
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    Money, man. I wish I could afford it all but I had to forego something.

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    Quote Originally Posted by Mr. Luos View Post
    Numbers are currently great for a stalled automatic on a mustang dyno.


    Look for 380-420RWHP once the heads and cam are on. On that same dyno. Depends on how loose the stall is.

    That said, you will outrun 440RWHP M6 cars at the track no problem. Plenty there for mid 11's and better.
    Care to explain why? Is it because its an automatic and it takes considerably less skill to get consistent times when juxtaposed with its manual counterpart(ie: lots of m6 drivers suck?)?

    Or is there some other technical reason?

    You just saddened me because I have an m6 (even though I suck at driving it now so your comment would apply to me)

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    Member egod's Avatar
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    did you get it tuned after the mods, i might have missed that?

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Aetos View Post
    Care to explain why? Is it because its an automatic and it takes considerably less skill to get consistent times when juxtaposed with its manual counterpart(ie: lots of m6 drivers suck?)?

    Or is there some other technical reason?

    You just saddened me because I have an m6 (even though I suck at driving it now so your comment would apply to me)
    I am an M6 as well.

    I figure with a properly stalled A4 (or TH400) I would knock off .5 seconds.


    Easier to launch, not going to miss shifts, etc...

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    Preferred Member CWW17's Avatar
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    Quote Originally Posted by egod View Post
    did you get it tuned after the mods, i might have missed that?
    Yeah, it was after the listed mods... Not the H/C package. All of that is going in within the week!

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    Member Aetos's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    I am an M6 as well.

    I figure with a properly stalled A4 (or TH400) I would knock off .5 seconds.


    Easier to launch, not going to miss shifts, etc...
    Oh okay, so its all driver related, not mechanically.
    Hypothetically lets say you had a good driver, the manual should walk the automatic power for power, right?

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Aetos View Post
    Hypothetically lets say you had a good driver, the manual should walk the automatic power for power, right?
    If the driver is perfect....yes.

    The stalled automatic will prevent mis-shifts and make that launch MUCH easier on the driver.

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    N/A nitrously aspirated stangslayer98's Avatar
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    truth is rowing gears and cruising is comparable to nothing else except sex, when it comes to et's auto's have consistency, i still think auto's are like three wheeled motorcycles

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    Member Aetos's Avatar
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    Quote Originally Posted by stangslayer98 View Post
    truth is rowing gears and cruising is comparable to nothing else except sex, when it comes to et's auto's have consistency, i still think auto's are like three wheeled motorcycles
    Yea, at times I get such a good feeling when just rowing through the gears while just cruising. Something about pressing the clutch, throwing in the gear, letting out the clutch in one smooth transaction puts a smile on my face. (sometimes)

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