So in the interest of information sharing, I've decided to do a small write up on my build, tuning and results. My car is a 1999 6GSR. The specs that matter are as follows:
Fidanza cam gears (-4,-2)
Forged 2.0 L 9:1 CR
Fullrace prostock exhaust manifold
3" turbo-back exhuast
AMS intercooler /w 2.5 piping
Stock evo 9 turbo /w 21psi forge actuator
Blitz SUS intake filter thru stock MAF
Methanol injection kit
Stock head, Stock IM, Stock TB, Stock drivetrain /w ACT clutch
Evo 7 ecu tuned by me via ecuflash
Tuning this on local premium (~91oct?) has not been a joy. The max boost i ran was 24psi, making 342hp/320tq by audi. Timing was very low, 12* out the top, EGTs where 850*c @ the top of 3rd. holding 11.0 afrs.
To combat the octane issue, I started mixing methanol into the fuel... what I found was 1 gallon of methanol : full tank gave me a good bump in octane. At this level I was able to run as high as 28psi, doing 380/380. 14* out the top, with similar afrs and EGT.
The final tune I did was to switch on methanol injection. This added even more octane and cooled the intake some more, allowing ~30psi peak. Tuned to 11.4afr. Below is the dyno result:
Below is the log of the run:
Because of the small turbo, boost drops off to 26psi @ peak power and 20psi at the end of the pull. This last tune gets the odd 2-3count knock >7krpm. I turned boost back down to 28psi for daily use.
Currently, I'm installing an O2 dump and swapping the HKS cams for GSC. Aim is to break 400.
please feel free to ask any questions/ offer advice.
R.Mutt - for providing ecuflash support, definition files and general guidance in sorting out miscellaneous tuning issues which popped up. aka false knock! Also for helping witht he project R&D.
W2J - for being the plick that he is. And also for providing parts with great service and prices
Ricky - For his expertise in mechanics and a sturdy hand.