Year Make Model | Painless Performance
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Frequently Asked Questions

Find answers to the most frequently asked questions about Painless Performance Products by clicking on the links below.

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LS2 - LS3 - LS7
24X & 58X Crank Position Sensor Reluctors

LS2 engines equipped in 2005 Corvettes and 2005-06 GTOs and 2006 SSRs with engine codes ZJA, ZJB, 5MC, YTA and 6MC all had 24X crank position sensor reluctor wheels.  These LS2 engines can be operated with a LS1 ECM and Painless fuel injection harnesses 60520 and 60521.  An LS1/LS6 Corvette style accelerator pedal and TAC module must be used along with Corvette ECM calibration.
 
LS2/LS3/LS7 engines equipped in 2006 and up Corvettes had 58X crank position sensor reluctor wheels.  These engines can be operated with Painless fuel injection harnesses 60524 and 60525.  These harnesses utilize the E-38 ECM and a 2006 and up Corvette accelerator pedal. 

 
Cooling Fans

E-38 ECMs control the factory 2006 and up Corvette cooling fan through the use of a PWM signal to a fan shroud mounted cooling fan control module.  The fan control module pulse width modulates the cooling fan motor in order to control its speed.  The ECM changes the pwm signal to the fan control module according to a look up table as shown below.  Desire fan speed is shown as a percentage between 0 and 100.