Tuning this beast has been the most difficult task.
Stock timing set to 8.5 deg BTDC
Spart plug gapped at .035 inch running NGK iridium 1 stage colder plug
Boost timing master start point 21/2 PSI
Retard setting approx 1/2 deg per psi give or take depending on conditions.
Turbospecalties fuel controller set to 40%
set lower when it is cold.
Super AFC Hotwire Sensor 7/7 1 in 1 out
adjusted fuel for low throttle -6% from mid rpm graduated from center.
adjusted fuel setting for high throttle +6 percent from mid rpm and lowered gradually from center.
My boost setting is dependant on the current air temperature
Stock power 108 HP
Non turbo upgrades 0psi 120 HP
110 deg F and up 3 psi 135 HP
100 deg F and down 4 psi 145 HP
85 deg F and down 5 psi 162 HP
I use a higher gain setting in the heat and a lower gain setting in the cold.
75 deg F and down 6 psi 171 HP
65 deg F and down 7 psi 179 HP
60 deg F and donw 8 psi 190 HP
HP rating is calculated for crank HP wheel HP would be 15 percent less.
Each PSI produces approx 8.5 HP for my car plus a linear curve for the current air temperature.
You can not boost high pressure in the heat the air is too hot and you end up adjusting the boost timing
master retard so high to hold off knocking, that you loose any gain you might have had. Heat is a real killer
for turbo charged engines especially in Arizona.
Lets be real in the summertime my car is a real dog, but let it cool down a touch and I can eaisly keep
up with most V-6 powered cars. Or any V-TEC honda.