FFTEC VFF900 kit or the Vargas VTX-R 67 that is the question. (and related issues)

Alright before you read this post I want it to be known I have literally read every thread, post for post, about the FFTEC VFF900 kit and the Vargas VTX-R 67 that I have found. I tried to post all the threads I researched but my Reputation isn't high enough to post links..... These questions and topics are some that I feel have not been thoroughly covered. If I have overlooked a detail or thread forgive me. I have been reading day and night since I decided to pull the trigger on one of these kits so I can make a final spreadsheet on all the parts I need to order. The events im looking to compete in are quarter mile, half mile, whole mile and trap speed roll racing.

I will slowly update this original post with answered information. Just so much information to research so I wanted to get the ball rolling.

I have a 2007 335i sedan that I purchased in April 2014. I already have the car at FBO and its just not enough power for me…(I chose this platform for a reason…if I wanted to be like everyone else I would have bought an American muscle car so please don’t tell me I “chose the wrong platform” because at one point in time every 4 digit car has been where we are with our cars)
Current mods for those who are wondering are
-JB4 g5 w/meth controller
-Meth kit
-DCI
-VRSF Downpipes, 7” intercooler, Charge Pipe w/tial bov
-BMS back end flash

The following questions I’m open to any and every bit of knowledge you want to throw at me. I typed them up on word as I thought of things throughout the day.

Main Question...

Single Turbo FFTEC VFF900 kit or the Twin turbo Vargas VTX-R 67 AND WHY?



FUEL

1. What is being done for fueling?

-What are they running?
-What are they doing with LPFP (255,455, 485, dual?)
-What are they doing for HPFP
-Who makes the best HPFP

1. How much e85 are they running?
2. Are you running race fuel?
3. Are you running methanol?

-what percentage mix of meth and water are you running?
-how many nozzles, what size and where are they installed?
5. Are you running separate fuel system for example are you running extra injectors in the charge pipe?

Drivetrain questions

1. Do you have manual or automatic transmission?
2. Did you build your transmission?
3. Are you running factory axles?
4. Do you have LSD/ what gears are you running?
5. Do you have a separate tune that handles your transmission?

Software

1. Who tuned the car and what software/system did they use to tune the car and why?

1. What 3.5 MAP sensor did you choose and why?

Exhaust

1. What route did you take for exhaust?
   
   1. Why did you take this route?
      
      1. Brand whore or dyno proven?