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Review Z1 400HP Package

Old 04-29-2017, 09:46 AM
  #16  
StarKiller
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can these mods be applied to the X Sedan?
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Old 04-29-2017, 11:46 AM
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I don't see why not. Give Z1 a call. They are pretty knowledgeable.
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Old 04-30-2017, 03:08 AM
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I have a 2013 g37s automatic. I can say the HP gains are incorrect from Z1. It is definately faster but I have the stillen gen intake, z1 upper, z1 lower also, eps big bore throttle bodies, z1 headers, z1 high flow cats, stillen light weight udp, z1 2 piece rotors, stock cat back for now and I just got an ecutek dyno tune last week. I am putting 312 hp at the wheels, 276 torque at the wheels. This was done a wheel dyno, with 91 octane gas. Outside temp was a little warm for Los Angeles, about 83 degrees.
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Old 04-30-2017, 05:20 AM
  #19  
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I'm sure z1 meant crank hp. Not wheel. Also different dynos will give different readings
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Old 05-01-2017, 11:56 AM
  #20  
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If anyone gets this kit- you may want to pick up some MAF sensor cleaner at O'Reilly's for $8.95-ish. My passenger side MAF sensor kept putting me into limp mode and throwing CE lights. I cleaned it once and it worked for a week. I cleaned both of them thoroughly a second time and swapped them to opposite intakes and they have been good for just over 2 weeks now. Fingers crossed it stays this way...

I am not sure if it was due to the new air filters or not. Maybe take some compressed air to them before installing them to see if that helps too.
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Old 05-01-2017, 12:06 PM
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Speaking on which, my MPG went up after cleaning MAF's few weeks ago, also car idles better around 500 rpm vs fluctuation 500-700rpm before.
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Old 05-01-2017, 12:44 PM
  #22  
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Good point. That was the other thing I noticed- mpg's. Mine went up 2-3 mpg after cleaning the MAF's. I don't think it is kicking out black dust from the exhaust anymore either. All good things. Hopefully, it stays all good.
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Old 05-03-2017, 11:41 PM
  #23  
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i intended to clean my MAF sensors, but when i pulled one out at 30k miles, it was still shiny clean (looked like new), so i didnt bother.

i'll check again at 40k ...
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Old 05-04-2017, 05:29 PM
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Originally Posted by Landshark View Post
i intended to clean my MAF sensors, but when i pulled one out at 30k miles, it was still shiny clean (looked like new), so i didnt bother.

i'll check again at 40k ...
I thought the same thing. My MAF sensors looked spotless, but were still throwing codes. Probably some part inside of them that was getting the slightest bit dirty.
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Old 10-11-2017, 08:38 PM
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I've been trying to figure out this MAF sensor CE light issue with the Z1 400hp kit and not getting any help from Z1. I just wasted $300 on a new MAF sensor, but the car still goes into limp mode and throws a CE light almost at will over 5k rpm (especially in 3rd gear) or if I bog the engine accelerating in too high of a gear.

Anyone else have this kit on a sedan or experience the same problem?
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Old 10-11-2017, 08:49 PM
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I have this kit. My car used to go into limp mode as well. I also have the stillen gen 3 CAI and eps big throttle bodies. What other mods do you have?
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Old 10-11-2017, 09:00 PM
  #27  
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The Z1 kit is composed of their intakes, intake plenum, tune, headers, high flow cats and high flow exhaust. It sounds like you have different parts? You got the same CE light for MAF sensors? How did you fix it?
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Old 10-11-2017, 09:38 PM
  #28  
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The z1 400 power pack is comprised of upper intake manifold, headers, hfc's. What the heck did z1 sell you?
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Old 10-11-2017, 09:52 PM
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The z1 400 power pack is comprised of upper intake manifold, headers, hfc's. What the heck did z1 sell you?
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Old 10-11-2017, 10:06 PM
  #30  
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Regardless of what you bought, the mafs are going crazy from the added air flow. Your problem is lack of tune even though you spent money on an e tune from z1. I would never run that on my car. Not safe long term. I permanently fixed my problem by taking it in for an ecutek dyno tune and get rid of that uprev garbage z1 uses. Ecutek can also modify throttle body response to get rid of the laggy pedal input most g owners experience. It comes from the factory as a tiny little cheat to up gas mileage. Another great thing with ecutek is you can tune transmission line pressure for better shifting and lower risk of slip from the added power. I was going into limp mode almost everday before tune. After ecutek, my car literally came to life with 329 whp and 290 wtq. ZERO check engine lights since dyno tune. Find a ecutek tuner, tell them all your mods and what you are experiencing problem wise... best $700 i ever spent. Plus getting to watch your car dyno for the first time is ****ing awesome!
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