Per my old thread, I proved that the stock turbo inlets were restricting flow at higher boost levels and so I did some testing and built custom intakes.
Since then, I installed BMS's port injection kit, Fuel-it stage 3, and ditched the meth using full e85.
Setup:
Specs on Intakes:
The dyno photos in order are:
Here is a log of the last dyno run:
http://datazap.me/u/ghost/2015-02-05...&data=1-3-4-11
Misc notes:
Special thanks to Terry@BMS for the extensive support and parts, Fuel-it and VTT both for good components and support.
Since then, I installed BMS's port injection kit, Fuel-it stage 3, and ditched the meth using full e85.
Setup:
- N54, FBO, 6MT
- JB4 G5, Cobb backend flash (ATR)
- Custom 2.25" turbo inlets, w/BMS DCI
- BMS Port Injection kit
- Split Second injector controller (AIC1-G4H)
- Fuel-it Stage 3 dual LPFPs
- e85
- Stock exhaust (catted)
Specs on Intakes:
Quote:
Originally Posted by The Ghost
![Click here to enlarge]()
- Front intake specs: 2 1/8" 90 degree silicone elbow, 2.25" pipe directly into filter on passenger side. Piping covered with head reflective foil
- Rear intake specs: 2 1/8" 90 degree silicone elbow, about 14" of 2.0" aluminum pipe, 45 degree 2.25" silicone coupler to about 14" of 2.25" aluminum piping, 45 degree silicone bend to filter (2.25"). The picture below shows the upper half the intake.
- BMS DCI filters reused
- Vac canisters moved to driver's side (shown in attached)
- PCV retained, mounted bung near same place as stock (shown in attached)
- My maxed FBO meth/e85 car vs. my final tune today
- Comparison of timing changes (4-7 degree ramp, vs 7-9 degree ramp)
- FBO map 0 baseline vs. today's final tune
- All plots from today (tuning iterations)
Here is a log of the last dyno run:
http://datazap.me/u/ghost/2015-02-05...&data=1-3-4-11
Misc notes:
- Targeted 12.7:1 AFR (max power lean e85), however PI map needs work as it goes very rich (10:1) on spool as well as at 6500rpms. I didn't have time to keep reflashing the AIC, so I'll do that at a later time which should help torque and top end.
- Adding a small amount of timing made a HUGE difference in power (especially top-end). I decided to stop where I was as I was happy with the progress.
- These turbos (with these intakes) can make any reasonable boost it seems. 26psi@7krpms has a 66% IDC.
- Next mod is probably exhaust. While the e92 exhaust is supposedly pretty free-flowing, at 600+whp, I suspect there are gains to be had going to a 3.5" single exhaust without cats.
Special thanks to Terry@BMS for the extensive support and parts, Fuel-it and VTT both for good components and support.