Got Carl's ultimate 335xi sleeper on the dyno for just a quick session with the F-RB's (regular, i.e. not lites, not the +). Turbos did not disappoint. The car has the most basic of mods, outlined below. We only ran it 3 times, and out of time as we are leaving half a day for the new year. I believe this is about the max of this basic fuel system, but we will try to squeak some more out next week. We are testing a new product PFS has cooked up, and so far it's doing a very good job.
Boost was 26 psi, Timing set around 10-11 degrees but getting some corrections. 26 psi held to redline with only 57% WGDC. Run 2 it was over-boosting on the tune it came in on, as the turbos flow a TON more. We made some adjustments to the adder and got boost back under target so it wasn't closing the throttle. Results perfectly smooth graph.
It's quite clear these
out-spool the competition, and on a car with a real fuel system I.E. PI, Dual Walbro Fuel pump, no cats, 700 would a walk in the park.
Mods:
- 335 XI (X-delete)
- Pump E85 (reads E75)
- Stock N54 engine
- Stock N54 head
- Stock cat back exhaust (secondary cats IN PLACE)
- Stock intake manifold
- Stock PCV system with VTT Breather
- VTT F-RB's
- VTT Aluminum outlet
- VTT 2" Inlets
- VTT Dual cone filters
- PFS Single-shot LPFP (single 274 Walbro)
- PFS Soon to be announced HPFP upgrade
- VRSF DP's
- NO PI
- NO Stage 3 or Dual Walbro pump
- NO Meth
- 1 revision from what the car was brought in with GC Lites
We overlaid the runs with the last time the car was here on GC Lites, Stock HPFP, and E50. You can see the F-RB's give up a tiny bit to the GC Lites in spool, about 100 RPM not much, and lots left looking at the WGDC.
We have some decisions to make add a Double shot pump to the tank to get the LPFP up a bit, and possibly add some better fuel in it like 117 One Ethanol, but that is about 90% ethanol and will compound the fuel system being on the limit.
For the first test on a car that has minimal mods, very impressed. We will also be doing some pump testing as this car is flex-fuel. We can get 93 about 45 minutes away.
F-RB - Best Bang For Your Buck - Period...
Logs:
Run 2:
https://datazap.me/u/vargasturbotech/12-30-20-carl-morris-f-rbpod-1?log=0&data=3-4-23-27&zoom=87-154
Run 3:
https://datazap.me/u/vargasturbotec...f-rbpod-1?log=1&data=3-4-23-27-30&zoom=83-152