Tension Bolt S4 Vs S5
#12
Old bolts had a shorter threaded section. My two R5 13Bs had different lengths of threading. The short threaded bolts had rotor housings with three aluminum outcroppings around the spark plugs. The longer threaded bolts had semi-circle shrouds like FB 12As, which makes me think it's newer. This phenomena is only on the newer engines.
As to why, I can only guess that it's to try to prevent snapped bolts during high RPM running. Or they could make only one length of bolts and just chop 20mm from the ends for use in 12As (rather unlikely).
As to why, I can only guess that it's to try to prevent snapped bolts during high RPM running. Or they could make only one length of bolts and just chop 20mm from the ends for use in 12As (rather unlikely).
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slvr7
Rotary Engine Building, Porting & Swaps
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05-17-2004 11:26 AM
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