I do NOT have his del Slow, although my Civic HB was the same color as his Sol
In my driving I was averaging 67-70 mph (70-73 mph) indicated, mostly on I-75 between Detroit and Cincy.
Above a certain ambient temp the ECU starts to use less timing as an overkill measure to protect the engine. This kills performance and MPG, well it did in my testing with THAT tune. Normally my drives were at night to avoid the mid day heat.
Knowing what I have done with my old car, reading what pgfpro has done, as well as what I'm learning on here, if all that info was combine into one car....yeah.
But drop the hammer and the car isn't boring anymore. I drag race and autocross for fun.
With OBD-2 you can convert back to OBD-1 to be alble to tune....unless you are in Cali with the smog Nazi's. Thing is I'm putting out less pollution per mile even if NOx numbers are slightly higher (ppm) they end up lower (ppM) per Mile driven.