With a new fuel system, maintenance, other odds and ends taken care of I went back to the dyno and sent it again. Boost only on pump E85, no other power adders were used.
I believe this is a new horsepower record for the fairly common N54 6266 top mount setup
Mod list:
[LIST]
[*]Doc Race turbo kit, Gen2 6266 DBB 1.00AR
[*]NTK pre-turbo O2s, Innovate Motorsports venturi heat sinks
[*]DIY stage 4 fuel system on pump E85 (tested at ~83%)
[LIST]
[*]Walbro 450 + 525
[*]BMP 750cc port injectors
[*]Precision Raceworks FPR / return
[*]12psi hobbs, 6AN feed, etc etc.
[/LIST]
[*]R8 coils / NGK 97506 @ 0.025". Plugs indexed (gap facing intake) with shims
[*]VRSF 7.5" IC and charge pipe
[*]Motiv closed deck N54 short block (stock heads and cams)
[*]Spec 3+ / smfw
[/LIST]
Log: [URL]
http://datazap.me/u/veer90/n54-6266-800whp?log=1&data=1-10-14-18-24-35[/URL]
Tuning notes and observations:
[LIST]
[*][S]Boost limit - for 8.7 psi wastegate springs seems to be about 33psi at redline with a 3 port MAC. Car couldn't hold 34.5 psi target above 5500 rpm. [/S]This depends on ambient temperature.
[*]False knock fix - trim pots at 85k ohms + desensitize knock tables MHD check box combination is still sensitive to the condition of the plugs. Brand new plugs, no timing pulls. Old trashed plugs = timing pulls of 3-5* or more depending on boost.
[*]MBT timing - was 15.5* timing at redline for my setup. Pulls at 15* and 16* put down less power.
[*]Fuel system - could not be happier with it. Fuel pressure for dayssss
[*]Bank 1 pre turbo O2 got a bit too hot, was reading false lean during the very end of one pull but was not damaged. Cleared codes and it worked normally on the drive home.
[*]The spec 3+ slipped at 712 wtq last time and I'm making way more torque now. No clue how it's still holding together LOL
[/LIST]
Much thanks to:
[LIST]
[*][USER=24]
@V8bait[/USER] Justin Hubenak [USER=1099]
@all4bspinnin[/USER] David Shoup - really appreciate the tuning advice, patience, and knowledge sharing.
[*]Top Secret USA - dyno time and perpetual encouragement to send it.
[*][USER=820]
@PC Racing[/USER] - LPFP and fuel system help.
[*][USER=333]
@PRECISION RACEWORKS[/USER] [USER=1120]
@BlackMarketParts[/USER] - good products and very DIY friendly too, answered a lot of my questions on fuel system design.
[*]VRSF - no hassle quality go fast parts
[*]Motiv - built engine still alive and kicking
[*]Friends, too many to list - huge thanks for all the DIY help, prep time, etc etc.
[/LIST]