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Nismo350z#0310 Nismo350z#0310 is offline

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  1. Resmarted
    02-06-2015 04:52 PM
    Resmarted
    But yeah you should look at bigger turbos, and I really recommend a meth kit. Direct port is worth it. If you go devil's own you can get a really nice setup for about $400.
    The cool thing about the water meth is how it can affect your tune. If you have it come on with a simple hobbs switch, early into the boost curve, it can basically slow down the engine. So if you set it up right it can help that power curve slow down how it comes in, without hurting anything. And keeping boost building. You can also tune around it and make "room" for it by leaning things out and advancing timing, but it can help if turbos are coming in really hard a little earlier than you wanted... There are a lot of little things like that combined with how you set the duty cycle on the boost controller to help ramp in boost slowly. Depending on how your wastegates are actually plumbed though, you might not get all the results you want with just wastegate control.
  2. Resmarted
    02-06-2015 04:47 PM
    Resmarted
    Oh yeah of course there is parasitic loss, but what's put to the ground is what actually matters. The one nice thing is that pump/meth for both (sc vs larger turbo-s), the S/C can have more low end torque. But obviously not at a very aggressive rate, it just is linear across the hole band. That's pretty nice for tuning and engine longevity. But the loss is definitely a big draw back. I'd feel comfortable with a ysi on my fuel setup, because I have a -10 line and -10 FPR on-top of the big injectors and dual pumps. So I have a ton of fuel flow. Most people don't have that much though. The stock tank routing sucks a$$. Since I made pretty much all the stuff on the car, I just figured it out as I went. So I didn't know the corners were so tight around the stock tank until it was too late LOL. I have a spare veyron pump and sump if you're ever interested (sell it for cheap compared to the cost new).
  3. Nismo350z#0310
    02-06-2015 04:17 PM
    Nismo350z#0310
    SC also has the parasitic loss, so even at 600whp you're making a little more at the engine than a turbo (more than 15% avg drivetrain loss), so it's kind of a hidden effect you're not seeing on the dyno. But either way, there arent kits available anymore for the HR I dont believe with GTM going under. Higher numbers are harder to come by the SC builds from what Ive seen.
  4. Nismo350z#0310
    02-06-2015 04:17 PM
    Nismo350z#0310
    Yeah, we've discussed the possibility of running bigger turbos, to lesson the torque in the lower mid/range. It's got smaller garrett, so that's the reason we were surprised at the numbers, but also for the higher torque which is around 520. My tuner believes the HR limit is 540 and is confident it will be fine. Most the similar builds he's tuned as well as the one's we have seen have only hit around the 530s mark in the mid 11 psi range. So +80ish whp on only 2 more psi was surprising. There are a few VHRs running around in the mid 600s with no problems, and theyve actually tuned the owners previous 370 to around 650whp for a while with no issues. same weak points; rods, etc. So we believe given an optimal tune it will be fine. The GTM kit is pretty efficient and my external wastegates, full 3" exhaust setup probably helped maximize the output.
  5. Resmarted
    02-06-2015 03:30 PM
    Resmarted
    If the tune is nice and conservative (and turbos are spooling up slowly and not super early) you should be able to run that tune all the time. Although, you could just throw caution to the wind and run that power a lot of the time... Dropping in another stock long block isn't terrible hard or expensive.
  6. Resmarted
    02-06-2015 03:28 PM
    Resmarted
    As for your block though, I'm not surprised about your numbers. With the more aggressive cams, and exhaust variable timing, you can easily make plenty of power. Along side the shorter runners HR's have. The block is better put together too, and you can rev higher. Lastly better rods... I think if you had a S/C you could run reliably 600whp, just so the engine made less torque and the powerband was as conservative as possible. Torque is what kills our rods (rod stroke ratio is high, similar to what's on 4g63's).
  7. Resmarted
    02-06-2015 03:17 PM
    Resmarted
    I want to have the flexability of being able to run e85. Rumors are an e85 station will be coming to our little town some time maybe soon. Also I might move away from home (again), so bigger cities tend to have e85. As for duty cycle. No idea lol. Whatever makes the power I want to make. The goal from day one is 600whp on a mustang dyno with pump and meth. So whatever gets me there is what I'll use. I wanted the car to be fast enough on any given day to handle most anything I run into (Zr1's, most boosted imports, KB cobras, GT500's etc). That's enough power to do so. Then on a race gas or e85 tune I want the car to trap 140+. The main goal though is that 600whp on a low dyno, 700whp on a high is the important one. I'd rather have a car that makes less power on race, and more on pump + additives, because that's what I can use anywhere. I've seen tons of cars that are "700whp" or some number but only run pump gas like 400whp or 500whp
  8. Nismo350z#0310
    02-06-2015 02:48 PM
    Nismo350z#0310
    Well I hope your health issues get better, and its good the car is on its way. ID2000s are huge, what you planning on running at? I've got in a little bit of an overkill with ID1000s, but I got a killer deal on them barely used with a free 340 pump, so had to go with it.
  9. Resmarted
    02-06-2015 01:59 PM
    Resmarted
    So the car's better than I am as of now lmao. Just want to finalize the wiring inside the car (for the gauges). Pretty happy with where it is. We're going to re work the hotside piping a bit. Have been contemplating getting a YSI instead, but will probably just stay turbo. Got a twin 044 setup and id2000's as well... New wideband... You know, always adding to the list.
  10. Resmarted
    02-06-2015 01:57 PM
    Resmarted
    Car was running but badly. I kept tinkering with the tune, and had little to no results. That was like... 5-6 months ago. Spent the last 6 months or so in and out of hospitals/doctors offices. Health went to sh**. But now I'm doing a bit better again... I pulled the coil packs on cylinders 1&3 for sh**s and it didn't run any worse. While checking the plugs I found oil in between the coils and plugs and realized why I was getting ignition problems. So finally last night swapped in some new valve covers to fix that seal issue. Just waiting on the RTV to dry to put oil back in her and get to messing with the tune again. Car sounds absolutely mad. Just insane with the 4". Love it.
    Have to the rear brake lines I cut to make room for the secondary oil system lines, but I got rid of the separate oil system idea for simplicity's sake.

About Me

  • About Nismo350z#0310
    Z/G Owner
    Z
    Location
    The Piedmont
    Color
    Black
    Trim Level
    Nismo
    MyMods
    GTM Stage 2 Tuner Twin Turbo kit (SOLD)
    Made 621whp on stock motor

    Remaining Parts:
    GTM 25 Row Oil Cooler Kit
    Motordyne TDX Version 1 3" exhaust
    Stance Pro Comp coilovers
    Swift race springs 12kg front, 6 kg rear
    SPL Pro front camber arms
    SPL Pro rear camber arms
    SPL Pro rear toe arms
    SPL Pro Essentric Lockout Kit
    Hotchkis sway bars
    Circuit Sports sway bar endlinks
    Volk RE30 19x10 , 19x11
    Yoko Advan AD08r tires 275/30/19 front
    Dunlop Sport Maxx Race tires 305/30/19 rear
    Z1Motorsports drilled/slotted brake rotors
    OEM Brembo brake calipers
    Hawk HP Plus race brake pads
    Seam hand-welded chassis by Autech
    Front & rear Autech/Yamaha chassis dampers
    Southbend Stage 3.5 clutch
    Southbend lightweight steel race flywheel
    ZSpeed heavy duty Slave Cylinder
    Wilwood heavy duty Master Cylinder
    Carbon fiber driveshaft
    Partially gutted rear trunk
    Nismo GT titanium shift knob (FTW)
    Kenwood DNN990HD touchscreen Navigation
    Hydrodipped CF door panels
    Country of Residence
    US
  • Signature
    2007 Nismo 350z l Current Build 1,xxxwhp Goal: RJM Closed Deck sleeved block, GTR manifold, Carrillo Rods, CP pistons, Tomei Cams, OS Giken Triple plate clutch, DIY top mount PT7675 Gen 2 turbo kit, and the list goes on...

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  • Last Activity: 02-23-2017 06:00 PM
  • Join Date: 05-29-2012

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