We test Spray It Racing’s USM GTR Turbos… Here’s the dyno results

As many of you already know, the R35 GTR is an extremely capable platform. Even in stock engine/turbo configurations, 600+Whp/wtq is easily achievable.  Though running the stock turbos at high boost levels is a cost effective solution for many, there are concerns with how hard they can be on the stock rods. Because the stockers are so small, they provide higher boost at midrange creating a high torque curve, which can be dangerous to the factory connecting rods. You will notice that all stock turbo dyno graphs show exactly what we are talking about. We like the SiR USM turbos because they allow us to keep peak torque in check for connecting rod safety while allowing more torque towards redline which means more horsepower at redline…. ALOT more! We are able to produce 691whp on just 17psi of boost!

Take this beautiful 2013 GTR for example. The owner came to us with a goal to make large turbo horsepower on a stock engine and we felt the following parts combo was the best way to get there. The car was tuned via COBB Accessport Flex Fuel by our in house tuner, Alex Kallin.

All parts available here at BCP (Call for current pricing please)

SiR USM Turbos
ETS Street FMIC
Got Boost Intercooler piping
Got Boost Flex Fuel kit
Injector Dynamics ID1300 cc injectors
Aeromotive 325 fuel pumps
Got Boost 3″ Intake
COBB V3 Accessport with transmission Flashing (Including custom features: ECU Traction Control, Rolling Boost, Map Switching)
Full catless turboback exhaust

                                                                Here we have 3 switchable E85 maps ranging from 565whp and 691whp. Notice the torque is smooth and does not crest over 605 ensuring rod safety.

                                                                              We run the R35 in RWD only, per Jack’s Transmissions specific instructions to ensure longevity to the AWD unit. 

                                                                                             To install the turbochargers, the engine must be lowered down. Don’t worry- You’ll never know it even came out!

                                                                              Preparing the ETS Front Mount for installation. Shortly after, the GotBoost piping slipped in easily.