A couple of weeks ago, a customer contacted us because he was looking for some assistance with his One Lap of America set up on his new GT-R. A week later, we received a beautiful 2012 Black Edition GT-R straight off of the show room floor with single digit mileage and window stickers intact. After consulting with the customer, and assessing his goals and budget we developed a very cost effective plan for an outstanding weekend track package while still maintaining 100% of the OEM comfort and safety features inherent in the GT-R.

• Cobb Tuning SF Intakes
• AMS Catless Downpipes
• CBRD 90mm Y-Pipe
• Dodson Front Adjustable A-arms
• SPL Rear Camber Links
• SPL Rear Toe Links
• Forged Performance Sway Bar Kit with Solid Monoball End Links
• Forged Performance Stainless Steel Brake Lines
• Carbotech XP12 Brake Pads
• Willall Victory Spec Transmission Fluid
• Dodson Transmission Fluid Filter and Magnet Kit
• Willall Differential Fluid
• Traqmate Data System
• Schroth 4-point ASM Harness
• Volk G2 Wheels
• Michelin Pilot Super Sport Tires 295/35/20 Square
• Forged Performance Spec Track Alignment
• Forged Performance Custom ECU Calibration using Cobb Accessport (numbers withheld at the customer’s request, due to the upcoming OLOA 2012 race)
• Engine Break-In on our Dyno Dynamics Load Based Dyno
• Final Track Test and setup at Road Atlanta by Sharif@Forged

Before shipping the vehicle back to our customer we agreed that a track test would be essential to insure the car was perfectly dialed in and setup to compete at next year’s OLOA event. With the customer's blessings, Sharif tested the vehicle at Road Atlanta for final track adjustments and confirmation of our work. There is always something unnerving about taking a customer’s brand new car to one of the most dangerous tracks in North American and pushing it to 10/10th’s. But with thousands of laps around Road Atlanta, Sharif quickly and safely confirmed the setup with only tire pressure adjustments in between hot laps. Sharif programmed three different road course calibrations during the dyno tuning process which are, naturally, switchable on the fly. During testing, he only used the lowest boost map which is comparable to the factory delivered boost pressure. Remarkable, even with stock shocks the car handled superbly and Sharif emerged from the car with a big smile on his face. With stock boost, in traffic on a damp track, 1:33 laptimes were had. No doubt with open and clear track this fairly mild build can easily see 1:32’s or better. For comparison, our track prepared GT-R runs 1:28’s. At the end of the test, we felt confident that the owner would be very happy with the car’s performance and handling characteristics. The car was very easy to drive which allowed very early application of power and a confidence inspiring transition from turn to turn. Nissan made 100’s of small changes to the 2012 GT-R that in total have resulted in a much improved driving experience out of the box. With the Forged Performance track treatment, the good work became great! The biggest improvement we feel, comes from the awesome Michelin Pilot Super Sport tires and our Forged Performance Sway Bar kit. Our large bars with solid race grade monoball end links really help tighten up the suspension in the corners while allowing enough flexibility for good transient response. With a few key suspension mods and without breaking the bank, this is a terrific entry level track package. Thanks for looking.

 

Bump. for someone who is looking into a gt-r build. I found this thread to be extremely well said and educational. TY

 

Where does harness attach to from behind?

 

It attaches to the rear seat OEM seat belt anchors

Remember we are running Schroth ASM harnesses, not regular harnesses. Schroth I believe is one of the only manufacturers that offers an "anti-submarine" mesh in their ASM 4 point harnesses. All other 4 point harnesses are unsafe, IMHO. These are different harnesses from the normal Schorth 5 and 6 point harnesses. For clarification, the pictured harnesses are not an ASM harness...we placed them there for the photos. The ASM harnesses didn't arrive in time for the photo-shoot.



The patented SCHROTH asm® system offers an unique safety advantage for 4-point harnesses. asm® is the acronym for anti submarining. The risk to submarine (sliding underneath the lap belt), a well known phenomenon during frontal impacts, is significantly reduced by the asm® safety system. The energy converter is located in the inboard shoulder belt. Therefore make sure you purchase left and/or right harnesses. Severe injuries or death are possible using 4-point harnesses without the SCHROTH asm® safety system or an anti-sub strap. SCHROTH harnesses designed for use on public roads (FE push button models) or those likely to be used as 4-points come with the asm® safety system. The performance of the SCHROTH asm® safety system has also been positively tested in conjunction with airbags.

Spinal compression is mitigated since the shoulder belt angle does not exceed Schroth's recommended level of 20-25 degrees and ASM allows the body to roll naturally. The shoulder harnesses are not bolted to the floor. Spinal compression occurs from rigid non-ASM or 5/6 point harnesses that are angled at too extreme of a downward angle. Hope that clarifies things. Our bolt in 4 point harnesses bar/cage are in powder coating phase and it would certainly be an added safety benefit for a street driven car. Finding the happy balance of safety for both the street and the track is one of the most challenging tasks.

 

Very nice simple mods for a very nice car