Topgunz full supercharger kits!!

"Z"en · 08-27-2019, 01:54 AM

Quote:

Originally Posted by takemorepills

OK Guys, I have spent a bunch of time going back and forth on this forum, Youtube and the G37 forums and I think I have it figured out.
For a 7At G37 looking for around 430-450whp (or more) 91oct, can someone(s) let me know if I've figured it out correctly and what I may be missing?:
1. Buy TopGunz A2A full kit
2. Buy Aeromotive 340 fuel pump and CJM billet tophat assembly
3. Buy injectors somewhere around 750
4. Keep an eye on my stock cats and probably get some (Berks?) in the near future
5. Get ECUTek, I have a reputable ECUTek shop near me.
6. MAFs, shouldn't need to upgrade if I'm under 500hp?

That seems like everything I could find, am I on the right track?

You can use stock MAFs and get an Omni or Haltech MAP to ask your tuner doing hybrid tuning in ECUTek. Don't use stock cats. It will only hinder the performance. Remember the more the back pressure you reduce the more the performance you can improve. I'd recommend injector size 850 If your sure you won't go E. Last but not least, I'd strongly recommend you get a trans oil cooler for your automatic G.

TopgunZ · 08-27-2019, 07:38 AM

Quote:

Originally Posted by "Z"en

You can use stock MAFs and get an Omni or Haltech MAP to ask your tuner doing hybrid tuning in ECUTek. Don't use stock cats. It will only hinder the performance. Remember the more the back pressure you reduce the more the performance you can improve. I'd recommend injector size 850 If your sure you won't go E. Last but not least, I'd strongly recommend you get a trans oil cooler for your automatic G.

This.

takemorepills · 08-27-2019, 12:41 PM

Quote:

Originally Posted by "Z"en

You can use stock MAFs and get an Omni or Haltech MAP to ask your tuner doing hybrid tuning in ECUTek. Don't use stock cats. It will only hinder the performance. Remember the more the back pressure you reduce the more the performance you can improve. I'd recommend injector size 850 If your sure you won't go E. Last but not least, I'd strongly recommend you get a trans oil cooler for your automatic G.

Thanks for the suggestions, I'll definitely go with 850 and a trans cooler.

turtle64b · 08-28-2019, 11:09 AM

Quote:

Originally Posted by takemorepills

OK Guys, I have spent a bunch of time going back and forth on this forum, Youtube and the G37 forums and I think I have it figured out.
For a 7At G37 looking for around 430-450whp (or more) 91oct, can someone(s) let me know if I've figured it out correctly and what I may be missing?:
1. Buy TopGunz A2A full kit
2. Buy Aeromotive 340 fuel pump and CJM billet tophat assembly
3. Buy injectors somewhere around 750
4. Keep an eye on my stock cats and probably get some (Berks?) in the near future
5. Get ECUTek, I have a reputable ECUTek shop near me.
6. MAFs, shouldn't need to upgrade if I'm under 500hp?

That seems like everything I could find, am I on the right track?

If you need help with anything (if you're doing it yourself), I'm right on the other side of the water from you!

I went with a fuel return system and test pipes as well. I got ID1050x injectors. Topgunz can get you a great deal on those! My car runs like stock even with injectors that big. I also still use stock MAFs.

-Brett

Blandino · 09-01-2019, 03:13 PM

I thought I remembered someone mentioning the FI tow bar will work with this intercooler, but I can't find it again. Can anyone confirm this will fit?

redondoaveb · 09-01-2019, 04:52 PM

Quote:

Originally Posted by Blandino

I thought I remembered someone mentioning the FI tow bar will work with this intercooler, but I can't find it again. Can anyone confirm this will fit?

You want to know if it will work with Topgunz's intercooler? If so, yes it does.

takemorepills · 09-02-2019, 10:02 PM

Wasn't there an issue with the tow hook location on the G37?

DrBacon · 10-07-2019, 11:23 PM

I may be the first person in history to ask this question, but: how would I go about lowering the boost? I imagine swapping out one of the pulleys, which one though and where would I get one? The car is currently making 12.7psi of boost and Sebastian thinks more timing and less boost would be beneficial with the fuel I have available to me.

Senna-F1 · 10-07-2019, 11:27 PM

Quote:

Originally Posted by DrBacon

I may be the first person in history to ask this question, but: how would I go about lowering the boost? I imagine swapping out one of the pulleys, which one though and where would I get one? The car is currently making 12.7psi of boost and Sebastian thinks more timing and less boost would be beneficial with the fuel I have available to me.

Hmmm... so the car only makes too much boost at or near redline, correct?

So he wants you to sacrifice boost and power in the other 90% of the rev range in order to increase it at the very end, where you probably will spend very little time?

DrBacon · 10-07-2019, 11:43 PM

Quote:

Originally Posted by Senna-F1

Hmmm... so the car only makes too much boost at or near redline, correct?

So he wants you to sacrifice boost and power in the other 90% of the rev range in order to increase it at the very end, where you probably will spend very little time?

I am just relaying the information I was told. I think it's pretty safe to say Sebastian with his knowledge and experience is probably the undisputed best tuner for this platform, I trust his advice. I am however thinking I might put the car on a dyno to see how much power it makes at the current boost/timing, then play with the pulleys and have the timing adjusted and get the car re-dynoed, it would make for a nice comparison and I'll be able to know for sure which is ideal. But yes, you're right, it would ultimately depend on what I want more, more peak power or more power everywhere else. I haven't made that decision yet and I think comparing two dynos would be the best way to make that choice. If I'm only losing a little bit of power down low but making a decent amount more at the top end, then yeah that would probably be what I'd go with.

"Z"en · 10-08-2019, 08:05 AM

Quote:

Originally Posted by DrBacon

I am just relaying the information I was told. I think it's pretty safe to say Sebastian with his knowledge and experience is probably the undisputed best tuner for this platform, I trust his advice. I am however thinking I might put the car on a dyno to see how much power it makes at the current boost/timing, then play with the pulleys and have the timing adjusted and get the car re-dynoed, it would make for a nice comparison and I'll be able to know for sure which is ideal. But yes, you're right, it would ultimately depend on what I want more, more peak power or more power everywhere else. I haven't made that decision yet and I think comparing two dynos would be the best way to make that choice. If I'm only losing a little bit of power down low but making a decent amount more at the top end, then yeah that would probably be what I'd go with.

I'm interested in your supporting mods, too. Curious about the reason of lowering boost. I've been running 13psi on stock block of filter on and pump 93 gas for up to 6500 miles with no issues. What fuel are you using? What exhaust system (cat/catless/header/test pipes/cbe/pipe diameters) are you using? What fuel system are you using? What ignition timing is with your car? Increasing volumetric efficiency by means of better intake and exhaust can benefit power without the need of too much boost and is always good to do so, but it's better to let us know your mods first so that one could comprehend the reason. Lowering boost can be achieved by either a larger jackshaft pulley (serpentine side) or a larger supercharger pulley (supercharger side).

TopgunZ · 10-08-2019, 07:36 AM

What are you mods? How are you making almost 13psi with my kit? The only thing I can think of is that you have a restriction in your exhaust somewhere therefore creating too much backpressure which is exactly how boost is measured.

Do you have stock cats? Free flow exhaust?

DrBacon · 10-08-2019, 01:59 PM

Quote:

Originally Posted by TopgunZ

What are you mods? How are you making almost 13psi with my kit? The only thing I can think of is that you have a restriction in your exhaust somewhere therefore creating too much backpressure which is exactly how boost is measured.

Do you have stock cats? Free flow exhaust?

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.

"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:

10-08-2019, 07:36 AM	#12 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	What are you mods? How are you making almost 13psi with my kit? The only thing I can think of is that you have a restriction in your exhaust somewhere therefore creating too much backpressure which is exactly how boost is measured. Do you have stock cats? Free flow exhaust? __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM Last edited by TopgunZ; 10-08-2019 at 08:35 AM.

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09-01-2019, 03:13 PM	#5 (permalink)
Blandino Base Member Join Date: Jan 2018 Location: Sierra Vista, AZ Posts: 36 Drives: 370Z Pleb Edition Rep Power: 8	I thought I remembered someone mentioning the FI tow bar will work with this intercooler, but I can't find it again. Can anyone confirm this will fit?

09-02-2019, 10:02 PM	#7 (permalink)
takemorepills Base Member Join Date: Apr 2019 Location: Seattle, WA Posts: 196 Drives: Q60 3.7 AWD Rep Power: 6717	Wasn't there an issue with the tow hook location on the G37?

10-07-2019, 11:23 PM	#8 (permalink)
DrBacon Enthusiast Member Join Date: Nov 2016 Location: Washington Posts: 286 Drives: 2014 Nismo Rep Power: 27365	I may be the first person in history to ask this question, but: how would I go about lowering the boost? I imagine swapping out one of the pulleys, which one though and where would I get one? The car is currently making 12.7psi of boost and Sebastian thinks more timing and less boost would be beneficial with the fuel I have available to me.