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  1. #276
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    700whp and 3500lbs better be a lot faster than 132mph Click here to enlarge 500whp in a 3100lb Z06 is enough to do that.
    It's also easier to launch a Z06 + isn't dependent on boost (500 WHP on an LS7 can be done with standard bolt-ons). Z06 can also do 60+ in 1st gear so you're shifting only ~3 times while you'll have to shift 4 times in 335, regardless of the 6AT or 6MT 's Final Drive.

    Click here to enlarge Originally Posted by BEAR-AvHistory Click here to enlarge
    Random question. What muffler set does this car have?
    Full HKS Legamax, which has 65mm piping (~2.5") so there's a power restriction, need to go full 3" with some resonators (HPF & VRSF systems are both 3.5", Magnaflow, aFe + ETS are all 2.5" also, not sure about the Active kit @Andrew@activeautowerke).
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  2. #277
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    Click here to enlarge Originally Posted by benzy89 Click here to enlarge
    It's also easier to launch a Z06 + isn't dependent on boost (500 WHP on an LS7 can be done with standard bolt-ons). Z06 can also do 60+ in 1st gear so you're shifting only ~3 times while you'll have to shift 4 times in 335, regardless of the 6AT or 6MT 's Final Drive.
    All of which you just said is regarding ET, it doesn't affect trap speed all that much (2-3mph or so); other posts have explained why Shiv's car performed so poorly (it wasn't because of the launch). There were RB cars running high 120s with MUCH less power than 630whp. I'd be surprised seeing lots of LS7s make 500whp with standard bolt-ons. They make 440whp stock, so it's a lot to gain with only so many mods (a cam is not boltons).

    A single 3" would be restrictive on this car. The VRSF is a 3.5" single, HPF is similar. Need something closer to 4" single for this much power TBH. The head flows so poorly that it needs all the help it can get.

  3. #278
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    Dual 3" or single 4" would work fine.

  4. #279
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    IIRC he's running the HKS. So not the best flowing, but I'm not sure if its a restriction or not.
    Not sure where u got that. HKS is one of if not the best qualitt N54 exhaust on the market. Best piping, resonators mufflers. Definitely not restrictive at all.
    Click here to enlarge

  5. #280
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    A single 3.5" flows less than dual 2.5"
    Click here to enlarge

  6. #281
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    All of which you just said is regarding ET, it doesn't affect trap speed all that much (2-3mph or so); other posts have explained why Shiv's car performed so poorly (it wasn't because of the launch). There were RB cars running high 120s with MUCH less power than 630whp. I'd be surprised seeing lots of LS7s make 500whp with standard bolt-ons. They make 440whp stock, so it's a lot to gain with only so many mods (a cam is not boltons).
    With just an intake and a tune, you can gain 50rwhp on a LS7.

  7. #282
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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    It just keeps getting better every year but I think this year is pretty special
    This is most definitely a special year.

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  8. #283
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    Click here to enlarge Originally Posted by RnmEvo9 Click here to enlarge
    With just an intake and a tune, you can gain 50rwhp on a LS7.
    Not from what I've seen. Maybe with a new intake manifold and headers.

    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    Not sure where u got that. HKS is one of if not the best qualitt N54 exhaust on the market. Best piping, resonators mufflers. Definitely not restrictive at all.
    It's still a dual 2.5". You're at the power level where you need something better flowing than that.

    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    A single 3.5" flows less than dual 2.5"
    Not true. They flow about the same; considering a 3.5" also has more room for less bends than a dual 2.5" taking up the same space and only going through one muffler; the 3.5" generally wins. Do the math.

  9. #284
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    Not from what I've seen. Maybe with a new intake manifold and headers.



    It's still a dual 2.5". You're at the power level where you need something better flowing than that.



    Not true. They flow about the same; considering a 3.5" also has more room for less bends than a dual 2.5" taking up the same space and only going through one muffler; the 3.5" generally wins. Do the math.

    The total cross-sectional area of the 3.5" single is slightly lower than the 2.5" dual, but the frictional losses due to the exhaust wall surface area and the effect of bends would be greater in the dual exhaust. For a dual turbo setup though, I would definitely keep the exhaust streams divorced and run a dual 3".

  10. #285
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    Click here to enlarge Originally Posted by CBR335 Click here to enlarge
    The total cross-sectional area of the 3.5" single is slightly lower than the 2.5" dual, but the frictional losses due to the exhaust wall surface area and the effect of bends would be greater in the dual exhaust. For a dual turbo setup though, I would definitely keep the exhaust streams divorced and run a dual 3".
    This.

    Btw i've done the math Click here to enlarge downpipes is where it starts to matter but even exhaust piping itself is not a concern until you go past 1000whp

    All you pick up with larger diameter piping is more noise at these power levels..try it out or best just mount a pressure probe on your exhaust and see how much backpressure its seeing
    Last edited by dzenno@PTF; 04-27-2013 at 05:43 PM.
    Click here to enlarge

  11. #286
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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    This.

    Btw i've done the math Click here to enlarge downpipes is where it starts to matter but even exhaust piping itself is not a concern until you go past 1000whp

    All you pick up with larger diameter piping is more noise at these power levels..try it out or best just mount a pressure probe on your exhaust and see how much backpressure its seeing
    So 3.5" flows more than dual 2.5". Did you get that math right (its pretty simple calculating areas of circles)? I'm not sure dual 3" will be so easy to fit, honestly I'd doubt there will be any significant gains of a dual 3" over a single 4" (but there might be, who knows). I'd prefer the sound of a single exhaust over a dual, just personal preference. Also easier to make stealthy (I'm looking into a 328i bumper too, I'm already de-badged)

    I hear what you're saying for the 1000whp mark, and I've heard it before. I'm just saying you're wrong in reality as there is data that speaks otherwise. There's MANY MANY Supras running around with 4" exhausts that saw significant gains over their existing 3.5" setups when stepping into the 650whp+ range.

  12. #287
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    2 out of 2 members liked this post. Yes Reputation No
    The 335 is probably one of the best sleeper cars around. 328 bumper, 4'' exhaust to normal looking muffler, 328 badge, possible 700+ whp if not more. Talk about taking money from people...$#@!. Even if you pop the hood it can look stock other than the intake and possibly a charge pipe. Can beefed up DVs handle this HP?

  13. #288
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    Click here to enlarge Originally Posted by Torgus Click here to enlarge
    The 335 is probably one of the best sleeper cars around. 328 bumper, normal looking muffler, 328 badge, possible 700+ whp if not more. Talk about taking money from people...$#@!.
    Click here to enlarge

    I'm going further. Looking for stock BMW wheels of some sort to fit some R888's in the back. I'll be taking them to a wheel specialist to have them widened and setup with the perfect offset to fit some 295 or 305s in the rear. I dunno about a 328i badge though. I figure badgeless so at worst they think I'm an M3 poseur or something (I've got an Mtech front bumper)

  14. #289
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    So 3.5" flows more than dual 2.5". Did you get that math right (its pretty simple calculating areas of circles)? I'm not sure dual 3" will be so easy to fit, honestly I'd doubt there will be any significant gains of a dual 3" over a single 4" (but there might be, who knows). I'd prefer the sound of a single exhaust over a dual, just personal preference. Also easier to make stealthy (I'm looking into a 328i bumper too, I'm already de-badged)

    I hear what you're saying for the 1000whp mark, and I've heard it before. I'm just saying you're wrong in reality as there is data that speaks otherwise. There's MANY MANY Supras running around with 4" exhausts that saw significant gains over their existing 3.5" setups when stepping into the 650whp+ range.
    Single 3.5" flows less than dual 2.5". So naturally going single 4" vs single 3.5" will do better. Going dual 2.5" vs single 3.5" would see gains too Click here to enlarge

    Anyways once the kits are on we can see how exhausts play out Click here to enlarge
    Click here to enlarge

  15. #290
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    Click here to enlarge

    I'm going further. Looking for stock BMW wheels of some sort to fit some R888's in the back. I'll be taking them to a wheel specialist to have them widened and setup with the perfect offset to fit some 295 or 305s in the rear.
    Epic. All you need is a way to change the sidewall markings. Oh you want to race Ferrari? $1000 says I win.

  16. #291
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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    Single 3.5" flows less than dual 2.5". So naturally going single 4" vs single 3.5" will do better. Going dual 2.5" vs single 3.5" would see gains too Click here to enlarge

    Anyways once the kits are on we can see how exhausts play out Click here to enlarge
    A single 3.5" flows more than a dual 2.5" in reality, you can't avoid this. On a straight pipe it flows almost exactly the same, but in the real world it does flow more (real-world exhausts have bends in them) for reasons I said originally (as did cbr335i). Assuming a well-done y-pipe of course. I've already talked with Burns Stainless about that one Click here to enlarge

    And yes, we will see Click here to enlarge

  17. #292
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    I figure badgeless so at worst they think I'm an M3 poseur or something (I've got an Mtech front bumper)
    actually, PUT an m3 badge on it so you DO look like a poser.

  18. #293
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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    actually, PUT an m3 badge on it so you DO look like a poser.
    LOL.

  19. #294
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    Click here to enlarge Originally Posted by Sered Click here to enlarge
    Not from what I've seen. Maybe with a new intake manifold and headers.
    Straight from a 2008 Z06 owner on here:

    Click here to enlarge Originally Posted by Amerkin Click here to enlarge
    Compliments to the promoters and staff for a great event! I haven't had that much fun racing in quite awhile. It beats the heck out of running at Famoso, and with a lot less abuse on the vehicle. I had only three losses all day, with two not completely surprised, and one definitely. I ran the black 458 Italia with my '08 ZO6 (we are both running about 40hp over stock, me with a cold air intake and tune added 43rwhp, the Ferrari with hi-flow cats and tune the owner says worth 40+) and he won by 1/2 car. I lost to a GTR on E85, added boost, etc. by one car. The surprise was Terry Burger's 135i who pulled out a car on me just about at the top of second gear and we then stayed even on the rest of the run with him winning by a car length. I thought I would catch him in 4th where I had a distinct advantage with almost every car I ran, but not to be. I never raced a car with less power and out ran many with considerably more, thanks to light weight, aero and some old school racing savy. An event well worth the money and would definitely do it again.
    I don't see why its so hard to believe an LS7 gaining so much power from a few bolt ons.

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    0 out of 1 members liked this post. Yes Reputation No
    Nice, but one can only wonder what it makes on 91 and 93 pump octane gas with no methanol. Special fuel claims are not relevant for everyday non track experience.

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    Click here to enlarge Originally Posted by maxnix Click here to enlarge
    Nice, but one can only wonder what it makes on 91 and 93 pump octane gas with no methanol. Special fuel claims are not relevant for everyday non track experience.
    There's already data posted on the strict 91 octane results for the Vargas Stage 3s, 573 WHP / 537 WTQ. Probably won't start seeing 93 octane results until the kit gets into user's hands because 93 isn't readily available in CA
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  22. #297
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    Click here to enlarge Originally Posted by RnmEvo9 Click here to enlarge
    Straight from a 2008 Z06 owner on here:



    I don't see why its so hard to believe an LS7 gaining so much power from a few bolt ons.

    awesome post to read
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  23. #298
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    Click here to enlarge Originally Posted by maxnix Click here to enlarge
    Nice, but one can only wonder what it makes on 91 and 93 pump octane gas with no methanol. Special fuel claims are not relevant for everyday non track experience.
    I'd go back and read the other threads before commenting in this one.

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    Click here to enlarge Originally Posted by RnmEvo9 Click here to enlarge
    I don't see why its so hard to believe an LS7 gaining so much power from a few bolt ons.
    Nice link Click here to enlarge I guess I assumed GM had strung the motor out a bit more. Looks like 500whp is doable for that car with headers.

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    3 out of 3 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by RnmEvo9 Click here to enlarge
    Straight from a 2008 Z06 owner on here:



    I don't see why its so hard to believe an LS7 gaining so much power from a few bolt ons.
    LOL, I was at that Famoso event and witnessed Terry beating up on many a car with the 135i.....including me.

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