Real world TPI hp gains

George M. Dailey gmd at tecinfo.com
Wed Feb 21 01:25:28 GMT 1996


Decreasing inlet air temp(and intake manifold temp) will increase horsepower
with no other changes, assuming the ECM is allowed to adjust accordingly.
Has any one dyno tested a '89 350 TPI engine and then changed only the
thermostat (195 to 150) and removed the hot coolant going to the throttle
body to see the net 'real world' torque increase?  What do you guys think
about an electronic controlled thermostat on FI cars?  Dial it low for fun
in the sun power.  Dial it high when Jack frost is biting your head off.  

It's my understanding that, too low of an engine temp is bad for the engine
(long term).
Higher engine temps give better fuel economy and other desirable
characteristics for every day driving.  An electronic controlled thermostat
could allow street roders to have the cake and eat it too... if the gain is
substantial enough. 

GMD




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