For V1 & reference material for 350z motors & kits:
Forced Induction for Noobs...
VQ37VHR:
With the upgrades of the VQ35HR motor, Nissan decided to take the VQ motor one step further. Introducing the VQ37VHR... a similar engine setup but with newer technology such as VVEL, beefier internals, and better engine components. The VHR can easily make 500whp on a stock motor; which is an improvement over the HR which estimated around 450whp. If your hopes where to install a turbo kit, and some other goodies and have a 450-500whp daily monster... the VHR is your platform of choice.
For the brave souls out there who want to TT or SC there VHR; GTM, Greddy, Fast Intentions, and Stillen have what you need.
Turbo 101:
So the life long question of "What's better Single or Twins". Simple answer... both. It all depends on what you’re looking to use the turbo for. Are you strictly daily driving? Do you autocross, time-attack, drag race? You have to think about what you want to use your car for.
One of the easiest ways to explain the difference between the two is...
Twins - Gives you good low-end power and great mid-range, but lacks in the top-end. This is ideal for auto-crossing and time-attack. Twins will give you better response from the dig, and exiting corners. You have really good response in the low-mid range rpm's.
Single - Lacks in the lower rpm range but is great in the mid-range and top-end. This is the "ideal" setup for drag racing where your rpm's are mainly in the mid to upper range. The term “turbo-lag” is the time it takes for the turbo to see boost. The bigger turbo you have the more lag you will get.
Singles are sometimes preferred for daily driving. For the fact that when you cruising at low-rpm's; your car is actually seeing vacuum rather then boost. This helps with the longevity of the motor. Others prefer twins for daily driving because you have more "useable" power when cruising around town. Though with Twins, your motor will see boost more often then a single.
1/4 Mile Times: Link
Finished Builds: Link
Factory Coolant Gauge Readings: Link