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  1. Boost by gear re tune with new trans?

    Engine Management
    I've got a 98 hatch with a d16y8 vitara build. Will be making around 400 wheel. The car is going to be tuned on Neptune and i would like to do boost by gear. the goal is a 10.99. I know i will have the power its just a matter of putting the power to the ground and driving the car. So my question...
  2. Shops That Tune NeptuneRTP near MI

    Engine Management
    I'v extensively searched forms, shops and even asked around in person at some meets..I cannot find anyone who tunes Neptune RTP in Michigan!! I've also looked out of state(Indianan,Ohio,Illinois) and still couldn't i don't want to drive 4+ hours just to get a tune. Am i missing any shops? is...
  3. D16Y5 questions. I will not give up.

    Engine Management
    Hello D-series.org I have done a ton of research but not enough to really answer one burning question of mine. I hope I get my answer but maybe this will just be one more thread about "swap out the y5 for a y8" etc. I am very familiar with VTEC-E, lean-burn, etc. I m hoping people of great...
  4. D15z7 Turbo tuning help 3stage

    Engine Management
    Hey guys I'm am currently trying to tune my D15z7 on boost peak boost is about 9-10psi when it gets there. Maps really rich up top rite now so she stumbles to make full potential. My issue is light load stumble and break when barely on the TPS 5% or under, curious if i can rid this with the fuel...
  5. boosted ef, z6 @ 8 psi, low numbers???

    Forced Induction
    I am wanting opinions or possible reasons as to why I got such low numbers when i boosted my z6. So here's a quick run down of everything. When I bought my ef it was already boosted. It had an a6 head on zc block, with exhaust ports gasket matched, msd cap, igniter and wires, stock injectors and...
  6. NepTune RTP Letting me Down?

    Engine Management
    I was driving around today with my friend adjusting fuel trims and out of nowhere the battery light comes on and check engine light, the car stalls out and I coast it to the side of the road. I try to restart the engine but it doesn't start. I look at my Wideband and it reads 8.8 with the car...
  7. Ignition Map advice! (pics)

    Engine Management
    Heres my setup: d16z6 vitara/ eagle build d15 head vtec bisimoto 2.4 turbo cam greddy 15g w/ 2.5in back Neptune rtp huckstorf 690cc injectors blox IM Here are snapshot of right before Vtec engages (4800rpm) And right after vtec engages (5000rpm) It seems like my low cam ignition map is way off...
  8. Laptop, NepTune, Crome Pro, white Vaio

    For Sale
    Price Drop: $500 Shipped with CromePRO, $450 Shipped on its own no software. Hey guys I'm putting my Sony Vaio laptop up for sale since I have a desktop and another laptop. This was used for school, tuning and programming with Visual Studio. I'd like to sell it with the copy of Crome Pro that...
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