Steve's Toyota Supra Turbo
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Dyno Charts

In dyno charts of Supras with stock twins (that I've viewed) torque peaks at 4500 rpm.  In order to dyno my auto in 3rd gear I had to bring it up to 75 mph in 3rd (4200rpm) and then floor it.  By the time the turbos spool (4800 rpm?) the peak torque rpm has passed.  Next time I'll do a 2nd - 3rd pull to see the real peak torque (should be right around 430 rwtq)

Here is my dyno with the above mods, ~97 octane in tank (100 octane - 93 mix), spraying the intercooler with a 50/50 mix of isopropyl alcohol and water before the run, ice on intake (this is the before and after the fuel controller and cam gears.  The cam gears contributed about 5 rwhp max.)

Here is the difference between ~97 octane in tank (100 octane - 93 mix) and 93 octane

Turbo Connection in Edwardsville, IL is the place to dyno in the St. Louis, MO area.  Jim has the only dyno in the area that has a wideband O2 sensor for tuning.  Sadly, the sensor is not integrated with the dyno so the O2 readings do not print on the dyno charts.  Hopefully this will soon change.

An interesting observation during the Supra / RX-7 meet in St. Louis.  After even a single dyno pull a stock intercooler gets warm to the touch.  A friend's front mount intercooler stayed cool to the touch.  If one is going to make several dyno pulls with a stock IC within a few minutes, the 50 percent isopropyl alcohol / water mixture spray on the intercooler is critical for adequate cooling of the charge air.

last modified on Saturday, August 12, 2006