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VTT 2+ Results - WIP

This will be a work in progress post.

Setup

  • N54, FBO, 6MT
  • JB4 G5, Cobb backend flash
  • e50
  • 60/40 meth/water, CM10 + CM5 nozzles
  • Map 6 (25psi target)
  • VTT 2+, 20T, clipped turbine


Subjective observations: the car drives like stock turbos, with no noticeable lag. You can give it part throttle at 60mph in 6th gear and it just goes, just like stock snails (this is great). The turbo spool and whistle sound is louder than stock which is cool.

I've been working with Terry to get the boost dialed-in, and even with the WG's basically shut, it won't hold more than 17psi to redline. The boost tapers through each gear from the get-go.

Here are some single gear logs:



PWM is basically maxed-out. This is definitely different from log posted by NJZ (LINK) who can hold 20psi with only a 44% duty cycle (vs. 99% for me).

I'm hoping to get to the bottom of the lack of capacity of this set of turbos.
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