[Supras] richness under boost

[berniek at technicaldevelop.com]

Today, I temporarily wired up a Dawes A/F indicator, and found that as 
expected, the engine runs richer under boost than needed for best 
power.  There are ways I will be considering to lower combustion 
temperatures, such as water injection (already have the RV water pump).  
But for now, the Dawes readout always has the blue LED lit under boost, 
I guess the way Toyota intended it (about 9:1 A/F ratio).  The car feels 
good, so I'd rather be safe than sorry, but can use any number of means 
to get the A/F up to about 11:1 under boost.  I'm particularly concerned 
about safety since I'm running the stock pistions at 15 PSI, with one 
second long spikes up to 17-18 PSI.  Has 550cc, Lex, 3" exhaust, 57 trim 
turbo, Walbro and the usual mods which go along with these parts.


As always, any information would be appreciated.


Berniek