Looking for feedback on this base map as I'm in the process of tuning to reach my target boost:
About this map:
- conservative timing and fueling
- conservative 17psi boost target (update: now 19psi)
- maf scaling and injector flow/latency scaling done
- Turbo dynamics continuous tables reduced for EWG and EBCS
- All major tables scaled for increased engine load.
- other random misc. tables changed
Setup + mods:
- 2004 wrx with 2017 sti short block (hybrid 2.5 setup), thicker head gaskets, racing studs, no avcs
- dark blue 560cc injectors
- AEM 340 fuel pump
- vf48 turbo
- tial 38mm External Wastegate (13psi spring)
- Grimmspeed EBCS
- Dry filter cold air intake
- Sti intercooler
- CNT Equal length headers
- high flow catted downpipe
- Borla catback exhaust
- Subaru legacy 5 speed transmission XD
Context
- This car has been a daily driver for years, and plan to keep it that way. Never ending fun project.
- This base map seems to be working well in terms of fueling/timing, not seeing any knock on this map. Boost seems to spool well, getting peak boost around 3400rpm.
Questions
- I've heard that 18-19psi is around where i can make peak power with the vf48 due to the turbo's efficiency. How true is this?
- Can i hold 18-19psi with the vf48 to redline? What's people's experience with pushing the vf48?
- How can i adjust my tables to ensure my WGDC can increase/decrease fairly quickly? Is this a matter of my turbo dynamics tables needing adjustments? Or my initial/max wastegate duties?
Any help or feedback is appreciated! Use this rom at your own risk!
Changes/Issues
v1.5.6
- Around 3400 to 3600 rpm i experience some overboosting to 18.4psi, followed by an over-correction by my turbo dynamics dropping boost to 16.5psi, which makes it take a long time for boost to reach back up to my targets. You'll notice in the log WGDC hits 16% @ 3400rpm followed by a correction down to 8% @3600rpm, and struggles to make it's way back up, being at ~11% @5100rpm
- Attached a log
v1.5.7
- Reverted some turbo dynamics changes, (from .25 of stock, to .5 of stock). Hoping to allow TD's to make faster adjustments
- Updated Max WGDC table to target incremental increase from 12% to 16%, rather than a flat 16% to help prevent the overboost
v1.6.0
- After experiencing a fuel cut I realized I needed to raise the boost fuel cut tables
- I raised the target boost to 19psi tapering to redline, and played with wastegate duty tables to reach the target
- Power seems good, making ~316wtq @4315rpm in 3rd (romraider dyno)
- Raised maf CEL voltage limit to 4.9v
| Attachments: |
File comment: 3rd gear pull with v1.6.0 - 316wtq @4315rpm
romraiderlog_20250814_202137-dyno-3rd-160.csv [13.43 KiB]
Downloaded 16 times |
|
File comment: v1.6.0-basemap
v1.6.0-04wrxhybridvf48.zip [87.05 KiB]
Downloaded 28 times |
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File comment: 4th gear WOT with v1.5.6
romraiderlog_20250731_v1.5.6-4th.csv [7.23 KiB]
Downloaded 11 times |