Topgunz full supercharger kits!!

"Z"en · 10-08-2019, 02:04 PM

Quote:

Originally Posted by DrBacon

It's a full motordyne exhaust, including ART pipes, so no catalytic converters. I know it's not the absolute best free flowing exhaust but it should flow very well, significantly better than OEM. The "muffler" for it is just an x-pipe. I was surprised at that much boost too, considering everything I've seen people are making 10-11psi on the same setup. I have no idea why it is making so much boost, really don't.

Do you know the pipe diameters of your muffler? Any pics of your exhaust? I'm assuming your boost readings are correct....

DrBacon · 10-08-2019, 02:15 PM

Quote:

Originally Posted by "Z"en

Do you know the pipe diameters of your muffler? Any pics of your exhaust? I'm assuming your boost readings are correct....

I believe it starts at 2.5" and gradually increases to 3" or something like that, it's literally the stock motordyne shockwave exhaust for the 370z (https://motordyneengineering.com/pro...ockwave-e370z/)

I'm second guessing the boost readings my self, I am using the omni 4 bar map sensor. I just looked at the peak number for Manifold Absolute Pressure (and confirmed it with Sebastian as well). But, actually going back in the logs and seeing when it hit that number, it hit .80 bar at around 6500 rpm, peaked at .88 bar at 7,100rpm, then actually dropped a bit to around .78 bar by redline (7,700 rpm).

I'm still new at forced induction, but correct me if I'm wrong but I don't think a centrifugal supercharger is supposed to hit peak boost before redline then drop off, I suppose that would potentially indicate a boost leak, however it's already making more boost than it should.

Here's the MAP sensor log for the pull:

"Z"en · 10-08-2019, 02:56 PM

Quote:

Originally Posted by DrBacon

I believe it starts at 2.5" and gradually increases to 3" or something like that, it's literally the stock motordyne shockwave exhaust for the 370z (https://motordyneengineering.com/pro...ockwave-e370z/)

I'm second guessing the boost readings my self, I am using the omni 4 bar map sensor. I just looked at the peak number for Manifold Absolute Pressure (and confirmed it with Sebastian as well). But, actually going back in the logs and seeing when it hit that number, it hit .80 bar at around 6500 rpm, peaked at .88 bar at 7,100rpm, then actually dropped a bit to around .78 bar by redline (7,700 rpm).

I'm still new at forced induction, but correct me if I'm wrong but I don't think a centrifugal supercharger is supposed to hit peak boost before redline then drop off, I suppose that would potentially indicate a boost leak, however it's already making more boost than it should.

Here's the MAP sensor log for the pull:

Could you please check if there is any dust around the bracket? What's your combination of the pulley and belt? Are you overspinning your blower? I'm guessing your suffering from certain degree of belt slip in addition to the boost leak (if any).

DrBacon · 10-08-2019, 03:05 PM

Quote:

Originally Posted by "Z"en

Could you please check if there is any dust around the bracket? What's your combination of the pulley and belt? Are you overspinning your blower? I'm guessing your suffering from certain degree of belt slip in addition to the boost leak (if any).

I don't know the exact details, what I got is what went on, there was no extra parts to get mixed up with, so Aaron would know better about what's on it. In fact, the three pulleys and belt on the back of the supercharger already came pre-assembled, I never even had to touch any of that.

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