We have been working with Carlos for several years to raise power levels on his 2015 Nissan GT-R while retaining the stock engine and transmission. On his last visit to ZCG we installed USDM turbos from SIR, bolt-ons and performed an ethanol tune.

This time Carlos was ready to hold that boost for a little bit longer. We reached out to Bill Guthrie of SIR and purchased his upgraded actuators matched to our turbos. Originally we had not installed the actuators, trying to keep the boost level down to minimize stress on the engine/tranny. As we all know, the boost fix can last only so long! Carlos came back to ZCG for additional upgrades including an HKS transmission cooler and larger, single FMIC from Boost Logic.

 

Acuators:

Transmission temps are the enemy of high power levels and track duty for the R35. We installed an HKS transmission cooler and we are really impressed with its quality and performance.

You can also see our installation of this HKS cooler on Dan J’s R35, and he reports zero trans temperature issues on the track!

 

 

The dual intercoolers from the factory were replaced with a single, larger unit from Boost Logic:

OEM vs single:

Installation of the FMIC:

 

On Carlos’ last visit the R35 put down 611hp/520tq on 91 octane and 703hp/621tq to the wheels on E85. With the new actuators and FMIC it now makes 661p/590tq on 91 octane and 774hp/653tq on Ethanol.

91 Octane:

Before tuning on E85, 759p/628tq:

After tuning on E85, 774hp/653tq:

Allowing the boost to be held to redline resulted in high-end gains in both hp/tq. We can make more power at these boost levels but we are being conservative until we can do a proper built engine/tranny. Enjoy The Boost Carlos!