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How much Horsepower in my 2001 Z28

This is a discussion on How much Horsepower in my 2001 Z28 within the Dyno Information forums, part of the Racing Forums category; My new set up will include; SLP Cold air induction K@N Filter SLP Airbox lid Granatelli Mass Air Flow(W/cold air ...

  1. #1
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    Question How much Horsepower in my 2001 Z28

    My new set up will include;
    SLP Cold air induction
    K@N Filter
    SLP Airbox lid
    Granatelli Mass Air Flow(W/cold air tuning)
    Smmoth air bellows
    Throttle body bored out to 78mm
    Crane roller rocker arms
    JBA Shorty headers
    SLP Y pipe
    160 Thermostat
    Throttle body bypass
    reprogram with a Hypertech 3
    I wonder how much horsepower I will make?

  2. #2
    Member TACE02's Avatar
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    ASC #753
    2002 Collector's Edition

    why shorty headers, LTs are better for LS1s. If I had to guess though, maybe somewhere around the 330 RWHP/ 340 RWTQ give or take a couple digits. Rough guess. Every car is different though. one could see 320 and the next 330. I would also have to say the numbers will be lower if you have an automatic. Now put all that in and add a medium size cam and have it professionally tuned you can see 370+ RWHP/ 360+ RWHP.

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    SUPREME member-oderator oneBADDz's Avatar
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    Let me fix this for you
    My new set up will not include;
    SLP Cold air induction
    Granatelli Mass Air Flow(W/cold air tuning)
    Smmoth air bellows
    Throttle body bored out to 78mm
    Crane roller rocker arms
    JBA Shorty headers
    SLP Y pipe
    reprogram with a Hypertech 3

    But it will include:
    Long tube headers
    Off-road y pipe
    ported throttle body (either DIY or shaner)
    K&N Filter
    SLP Airbox lid
    160 Thermostat
    Dyno tune
    I wonder how much horsepower I will make?
    And then you can buy me some beer with the $600 dollars I just saved you since I got you more power than you would have had. Look for 350hp at the rear wheels, especially thanks to the long tubes and dyno tune. Can you work on it yourself? save up another $200 on top of what you saved doing it my way and put a cam kit in there to put over 400hp to the ground

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    Member jmhvenom's Avatar
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    One badd z is right... most of the that stuff is completely pointless unless you have an extremely modded car. Hypertech is crap, you can just get a street tune to save some money I would wait for dyno tune until you have heads and cam. Smooth air bellows can be made at home depot for 5 dollars. Im very confused as to why you would want new rocker arms with a lightly modded bolt on car... hrm... save yourself some pain and frustration.

    I have Airlid, bellows (cheap ones), 160thermo (didnt cost much, doesnt help much), K&N which is great, Free mods (some help there for mostly free).. Then the real stuff is Pacesetter Longstubes, Pace Ypipe, Vig 3800 stall, 3.73 gears, 3inch cutout, street tune... and it screams, for about the same amount of money you would be spending.

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    SUPREME member-oderator oneBADDz's Avatar
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    Is it an auto or a 6-speed, that's the big question. I meant to ask already

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    It is an auto, I wanted a 6 spd.
    I bought the shorty headers due to concerns over California emissions.
    The roller rocker arms were a poor man's new cam.
    I intend to get a dyno tune, but I do not know where to get it done.
    Guess I have more work to do.
    Thanx
    Last edited by lonewolf37; 07-05-2006 at 10:58 AM.

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    SUPREME member-oderator oneBADDz's Avatar
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    Do you already have these parts then? A stall will be the best mod you could imagine, it will make it feel like a whole different car. What parts do you already have and which ones do you still need to buy? We'll help with the best hp per $ if you give us a chance

    '99 Z28 It's got the BADASS mod
    IT'S FOR SALE here:
    http://www.ls1.com/forums/f38/99z28-lower-price-70562/

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    Quote Originally Posted by lonewolf37 View Post
    My new set up will include;
    SLP Cold air induction - No Effect
    K@N Filter - No Effect
    SLP Airbox lid -8 to 10 rwhp
    Granatelli Mass Air Flow(W/cold air tuning) - Can cost you up to 18 rwhp
    Smmoth air bellows - No Effect
    Throttle body bored out to 78mm - No Effect
    Crane roller rocker arms - Might get you 15 rwhp
    JBA Shorty headers - Maybe 3 or 4 rwhp
    SLP Y pipe - No Effect
    160 Thermostat - No Effect
    Throttle body bypass - No Effect
    reprogram with a Hypertech 3 - If you put in the "tuning" in combo with an AM MAF you're just begging for KR ... costing you another 10 to 15 rwhp
    I wonder how much horsepower I will make?
    How much rwhp you make depends on what you base. I've seen '01 Z28s base anywhere from 278 rwhp(mine) to 305 rwhp .... but with your set up you may be anywhere from improving 5-10 rwhp over stock to actually losing yourself rwhp.

    Quote Originally Posted by lonewolf37 View Post
    ... I intend to get a dyno tune, but I do not know where to get it done.
    Guess I have more work to do.
    Thanx
    Force Fed in Sacramento or Newtech in Fremont ... I personally like Nick at Newtech. But, I have lot of friends who swear by Keith at Force Fed.

    Also check out www.norcal-ls1.com for the local scene in NorCal ...

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    prolly not more than 285-290 with that setup...like these guys are sayin, the tune's and headers are everything. I have my 00 SS w/o headers, but with good boltons, an LS6 intake and a great tune doin 325 to the wheels. Next, I'll put in a mild cam and LT's and prolly get to 360-375. Hypertech is crap. Have it done right. You don't need a dyno. You just need to get a good PCM tune put on there for your mods. They're not that expensive. With your mods, the dyno piece is only gonna yield 4-7 HP over the PCM tune...not worth the extra dyno money. Wait till you got the cam and LT's in there to hit the dyno.

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    Oh Sh*********t!
    I allready have all these parts and a friend of mine is about to put them on.
    Where do I go from here?
    Oddly enough there is an ad for Granatelli MAF on this page.
    Cam or heads?

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    If you cant get the out good, you can not get it in good. Really think about LT's with a good y-pipe, high flowing mufflers also. If your gonna put money in the car you right as well do it right. I agree with so many others here with you choice in mods. when i read through it i didnt understand why.
    Granatelli Mass Air Flow(W/cold air tuning)- do nothing
    Throttle body bored out to 78mm- might as well buy a good intake for those expensive heads you be buying later, Its all good thou, with just a little money you gonna have this thing screamin.

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    Quote Originally Posted by lonewolf37 View Post
    Oh Sh*********t!
    I allready have all these parts and a friend of mine is about to put them on.
    Where do I go from here?
    Oddly enough there is an ad for Granatelli MAF on this page.
    Cam or heads?
    Well the good news is you haven't put the parts on.

    Here's my $.02 ...

    SLP Cold air induction - It doesn't do anything for rwhp, but you will see a kick in the top end .... maybe an extra mph or 2 in the traps
    K@N Filter - Again no rwhp, but it's a lifetime filter if properly maintained ... and with the SLP CAI, you'll be picking up all kinds of crap off the road, so it'll pay for itself in not having to buy a new filter every couple of months
    SLP Airbox lid -It's good to go
    Granatelli Mass Air Flow(W/cold air tuning) - Sell it on E-bay
    Smmoth air bellows - Doesn't do anything, but it does look good.
    Throttle body bored out to 78mm - Again no impact on rwhp, but you may see an improvement in throttle response. If it has the bump stop mod, it's good for a little more at WOT
    Crane roller rocker arms - I assume these are the 1.8s. Since you have them, put them in. But. if you do go with cam down the road, they will limit your cam options.
    JBA Shorty headers and SLP Y-Pipe - OK here's where it get's tricky. Shorties in and of themselves are hardly worth the effort. But we have the pesky smog issue here in CA. So you get LTs with an ORY pipe and join the bi-annual header swap out club. But since you have the shorties and the SLP pipe - which is absolutely useless - here's an option. Put on the shorties, get a set of spare cats for the flanges and weld in a set of straight pipes and put on the SLP Y. You will need a set of O2 sims. Then every two years you can get by with just swapping out the Y-pipe and cats
    160 Thermostat - Since you have it, put it in. In doesn't gain anything in and of itself. But if you ever decide to go down to SRP, in conjunction with resetting the fans, it will keep you a little cooler in the staging lanes.
    Throttle body bypass - This is one of the free mods, it gives you something to do when you don't have any money and you want to do a mod ... then you you can put it in your sig on the message boards.
    reprogram with a Hypertech 3 - Since you have an A4, you can use to adjust your shift points, bump the RPM and set the afore mentioned fans. If you don't use the GMAF, you can try the tuning. But, all the HPP3 is doing is adding timing and during the summer months, around here, that can cause KR issues.

    Before H/C ... there are couple of other things you can do. First and formost, I don't see any mention of a new catback, safe proven and effective. A pulley is another effective mod. And with an A4 a high stall TC is a must.

    Then suspension. The stock suspension is pretty easy on a 52 year old butt. But, it needs to be stiffened up to effectively plant the power an LS1 is capable of. LCAs and SFCs are the minimum.

    Good Luck

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    Senior Member Danger731's Avatar
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    Keep doin research and askin questions, you are heading in the right direction.
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    Thumbs up I appreciate the help

    Thanks for the directions, my 52 year old butt will be making some changes.
    Incidentally, I added up all the HP these mods promised, it came to 135 HP.
    I had not thought about my transmission, I will be on the transmission thread looking into a high stall TC.

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    The worst part is that I bought the MAF on ebay.

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    Member jmhvenom's Avatar
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    Quote Originally Posted by lonewolf37 View Post
    Thanks for the directions, my 52 year old butt will be making some changes.
    Incidentally, I added up all the HP these mods promised, it came to 135 HP.
    I had not thought about my transmission, I will be on the transmission thread looking into a high stall TC.
    Most people will be laughing about now, but we have good intentions. Adding up what they "say" will happen is not a good idea. Those mods wouldnt make 135 even at the flywheel.

    Free mods, LTs, ypipe, cutout, lid, pulleys might make you 50hp. Still would be close.

  17. #17
    member since may 2000 nhraformula's Avatar
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    im cammed, stalled, headers and just about all the other mods and im nowhere near 135 over stock rwhp
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    Member GMS Fleet's Avatar
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    Quote Originally Posted by Hi-Po View Post
    Granatelli Mass Air Flow(W/cold air tuning)- do nothing
    Really?

    It does nothing?

  19. #19
    Member GMS Fleet's Avatar
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    Quote Originally Posted by jmhvenom View Post
    The amount of tuning plus the cost of the MAF makes those gains practically nothing compared to other mods that would do so much more for the same price.
    There is no tuning necessary with our MAF. I didn't say there is other mods that give you more HP per dollar. Lids & some cat-back exhausts do give more HP per dollar, but other modifications are MORE costly in comparison to HP per dollar, especially if you need a mechanic to do the install.

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    There is an entire thread dedicated to that debate, take it in there. Don't f up this thread in a pissing match

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