Topgunz - air to air upgrade

TBatt

Which MAP sensor are you using? The stock sensor was not designed to read pressure so it could be off. I'm using the Nissan GTR sensor that SpecialtyZ sells along with there remote tune package. My AEM boost gauge and the GTR sensor agree with each other.

When I was looking for a boost leak I made a leak tester and pressurized the system up to 8psi and both of the sensors read the same (engine not running) during the test. The leak showed up around 3psi if I remember correctly. If you have an aircompressor and a good pressure regulator I'll be glad to loan you my tester that I made.

Top, do you have any words of wisdom that you can share?

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RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!

overtureZ

Did the leak make your car idle funny? Run rich?

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Auto/Z Enthusiast - Mechanical Engineer - Fabricator - Do it for dale

TBatt

No it didn't because the leak was at the exit of the intercooler which is still before the MAF sensors. The leak only affected my boost or lack of it. When I installed the A2A kit I missed tightening the clamps that hold the coupler from the intercooler to the intake pipe with the MAF sensors on it. It was very embarrassing.....

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RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!

perez519

Yes I have GTR map sensors. But for some reason they still over range and the map code still came back. So I got my tuner to disable that map code.

I don't think I have a vacuum leak I've checked all the lines. I could do a vacuum test as you mention and find out.

I'm using greddy infometer touch boost sensor and gauge. It's digital and connects via OBT-2 live. The monitor can record hi peak of the boost. The weird thing is, it says I hit 9.3 psi at 7600rpm. But during dyno it only shows 7.5-7.7psi max and my tuner could see on top end the power when the car start to slip or not get anymore psi.


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perez519

Also can anyone explain the mid power dip on torque? As you can see the top dyno was done October 2016 and the only changes I made was put on Tbatt anti-slip pulley. Hoping to fix my top end slip and get 9psi.

Is it possible it slipping on the SC idler pulley also? I'm using 9lb pulley provided by stillen btw.



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Jayhovah

What clutch are you running (assuming your are MT)?

My dyno had a similar dip in the middle and it was my OEM clutch starting to slip.

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2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted

perez519

Using Southbend TZ Kevlar/ fly wheel/ Zspeed CSC kit. My torque is only at 339tq.


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TBatt

The top graph looks like classic belt slip to me. The bottom one looks like a tuning issue.

Did you do any changes to the exhaust such as removing the stock cats and going to test pipes?

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RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!

perez519

Yeah talking to my tuner now. He also thinks it might be Uprev's ROM updates! But not sure yet.

No changes to exhaust system. Just the anti- slip pulley kits and a re-tune to clean up the top end. Was hoping to pick up 9psi and little more top end power.


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Kamillio

I have the Omni 4bar sensor from Specialty Z. I have an air compressor, I do have to see if I have a pressure regulator or a friend of mine has one. But both sensors reading different numbers makes no sense regardless of boost leak or not.


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370z

TBatt

I agree. They should be close at least.

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RJM pedal, Hotchkis Sway Bars, FI TDX, FOG Light, Z1 Slotted Drilled rotors, Stillen SC, Quaife ATB, Z1 Oil cooler, AEM Gauge Set, Galeforce gauge mount, Avant Garde M590 Hypersilver w/RE-11, TopgunZ A2A kit., ECUtek tuned by Seb: ROLL TIDE!