posted by toshi in an old post
in order to tune R33 on dyno, board is needed, which approximately costs $350-$400 only board.
Tuner makes ECU map on dyno themselves and this data is transfered onto PLCC chip then fitted onto the customers ECU
Other wise use R32 ECU ( need change all map.not only fuel and ignition).
R33 chip is selling at http://www.grid.co.jp/en/prod/prod93.htm.
This is a one time chip.
when remapping ignition timing DIY, make E F colum same as D colum ignition timing. ( also remove speed and boost limitter)
This means about same AFC.
And adjust base ignition timing by crank angle sensor about 2-3 degrees.
There is no need for a fuel map change.
Because when fitting dump pipe and hi flow cat , cat back, air pod , boost 0.8-0.9 bar A/F changes to about 11. (depends on parts performance)
A/F 11 is not rich. HKS kansai drag racer GTR A/F11 for safe and power.
I think rechip is cheaper way ecu tune for std turbo R33 GTS-T.(my map is totally different std map).
If change turbo in the future I recomend power fc for R33.
I think R32 do not need power fc.
If some one having pomping or fuel rich problem please send me PM or yuna@tpg.com.au.
I be able to chack problem by softwear then I will fix it. ( NSW only)
http://users.tpg.com.au/yuna/Skylines.html
Basically a lot of mucking around and will be hard to find someone in your area to do it.