Thread: VF570 installed
View Single Post
      02-04-2013, 12:46 AM   #152
Rated M Roadster
Captain
Rated M Roadster's Avatar
160
Rep
891
Posts

Drives: F10 M5, i3, Z4M
Join Date: Jun 2011
Location: PDX

iTrader: (9)

Quote:
Originally Posted by dre99gsx View Post
Why did VF stop at the 570 kit? Would be nice if they offered a "race" Stage3 kit!

Based on HPF's turbo data, they seem to be able to push 600whp on stock internals (granted better gas than 91 octane):

LHD Stage 2 Dyno

91 Octane (518hp)
91 Oct + Alc (670hp)
110 Octane (731hp)
110 Oct + Alc (762hp)
Multiply by 0.82 for rwhp
60-130mph in 6.86 sec
Factory Internals

It would seem that VF could go one more step further, perhaps a VF670 kit which requires meth or race fuel at the minimum (perhaps 12-14psi?).
VF does offer a stage 3, but it's custom build only and requires a built motor with lower compression. While running a meth dependent tune is feasible, it's not reliable. Most fail-safes on meth kits are connected to the boost controller; of which a centrifugal SC does not have. A meth pump fails and there goes your motor.

VAC even has a VF/VAC710 kit listed on their site.

I'm actually ordering an Aquamist meth kit shortly, but only for extra cooling and a slight octane boost on the track. It will have 6 jets spraying an ~17% mixture-to-fuel ratio 4 inches before each TB; with flow relative to the fuel injector duty cycles.
__________________

CURRENT ll F10 M5 l E85 Z4MR l I01 i3 REX
SOLD ll E70 X5M l E85 Z4MR VF570 l E36/7 Z3MR l E36 328i
Appreciate 0