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02-06-2015, 01:43 AM #1
VTT 2+, Port Injection Build - Dyno Progress
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 (Burger Tuning) 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:
The dyno photos in order are:
- 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.
Last edited by The Ghost; 02-06-2015 at 01:53 AM.
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