Sprint Car Torsion Bar.975" O.D x 30", 1 1/8", 3/4" Gun DrilledBrand: STRANGEPart Number: STSEE09753000Description: Strange Oval bars have 1" of bearing surface on each endof the bar. All other brands have 2" - that's 2 additional inches of bearing surface thatwe eliminate (overall) that weuse to increase the bar's effective length. Our effective length is 24" (our Sprint car bars have a 23" effective length) while all others are 22". We also increase our bar's O.D. (Gun-drilled bars only) to compensate for the bar rate vs. increased effective length. This further increasesthe strength of the bar. The effective length provides a more reactive, durable and stronger bar that retains its original rate over a longer period of time.
Many torsion bars are made from 4340 or a lesser grade steel...NOT OURS! Strange Ovaluses aircraft chrome vanadium steel which offers superior yield strength, fatigue properties, and impact strength. We use this proprietary aircraft steel which is high in carbon and Vanadium content. The high carbon content allows for increased hardness/strength and the Vanadium alloys have ahigher Shear Modulus and elongation. Bottom-line....this enables the bar to be stressed to a much higher point (20%-30%) ascompared to the common use of 4340 steel and also contributes greatly to bar memory without any ride-heightchange.
Superior material allows for unmatched bar hardness (Rc60 surface/Rc50 core), which equals superior strength, consistency and dependability.Strange Oval bars have a hardness of Rc60 surface and Rc50 inner core. The next closest competitor bar is Rc52surface & Rc46 inner core.So what does that mean? As thebar twists, the harder and stronger the bar material is AND the longer the bar will last without permanently yielding which means Increasedbar LIFE....period!
