Nissan 370Z Forum - View Single Post - GTM 370z supercharger 550bhp/400 ft of Torque: The Masterpiece

Mike@GTM · 03-07-2011, 02:59 PM

I would be happy to address your questions.

1) There is in fact a build thread for that exact car: GTM Performance Engineering 370Z SUPERCHARGER KIT PRESS RELEASE

2) This was part of the R&D process. Those numbers were made with a one-off race intake, GTM 2.5" cat-back exhaust and STOCK CATS. It is also an extremely aggressive tune on 93 octane gas. Mainly this was to demonstrate the supercharger's capability. Our off the shelf tune is conservative to ensure that everyone that buys and installs it will be able to achieve the advertised 500bhp (or very close to it depending on many variables) without undue risk to their engines.

The other main reason why we are showing such a graph is because we were able to achieve those numbers with this supercharger unit. Also, this is a strong validation that the supercharger unit is capable of more power with a better tuned VVEL tuning solution.

Here is the same supercharger unit making 490whp on a 350Z (VQ35HR with tuned dual CVVT) with 100 octane gas:

This shows very clearly how VVEL adversely affects power output with a supercharger. I cannot overstate that enough.

Again, we were able to make 460whp on the 370Z with STOCK CATS. The reason for that is because, quite simply, the back pressure generated by the stock cats keeps air from blowing through the engine. This means more air stays in the cylinder to be combusted. Once we are able to tune VVEL, we will be able to reduce the overlap and thus make more power on supercharged cars.

03-07-2011, 02:59 PM	#2 (permalink)
Mike@GTM Not an active Vendor. DO NOT BUY Join Date: Sep 2009 Location: California Posts: 391 Drives: '13 Hot Lava FR-S Rep Power: 17	I would be happy to address your questions. 1) There is in fact a build thread for that exact car: GTM Performance Engineering 370Z SUPERCHARGER KIT PRESS RELEASE 2) This was part of the R&D process. Those numbers were made with a one-off race intake, GTM 2.5" cat-back exhaust and STOCK CATS. It is also an extremely aggressive tune on 93 octane gas. Mainly this was to demonstrate the supercharger's capability. Our off the shelf tune is conservative to ensure that everyone that buys and installs it will be able to achieve the advertised 500bhp (or very close to it depending on many variables) without undue risk to their engines. The other main reason why we are showing such a graph is because we were able to achieve those numbers with this supercharger unit. Also, this is a strong validation that the supercharger unit is capable of more power with a better tuned VVEL tuning solution. Here is the same supercharger unit making 490whp on a 350Z (VQ35HR with tuned dual CVVT) with 100 octane gas: This shows very clearly how VVEL adversely affects power output with a supercharger. I cannot overstate that enough. Again, we were able to make 460whp on the 370Z with STOCK CATS. The reason for that is because, quite simply, the back pressure generated by the stock cats keeps air from blowing through the engine. This means more air stays in the cylinder to be combusted. Once we are able to tune VVEL, we will be able to reduce the overlap and thus make more power on supercharged cars.