40 Spline axles and the street

[PhilM]

Anyone run 40 spline gun drilled on the street? i was told that because of the hardness of the metal, they will fatigue. Is this true??

[Jim Filipowski]

YES.

[mike gerlach]

I asked strange the same question...........35 (street axle) vs. 40 spline..race

they emailed me that for my application the 40 spline was recommended and that I should be okay on the street, NOT recommended by them though, as long as I go easy around pot holes and railroad tracks.......sudden jarring is baaaadddd.

Now from what I can tell....the radius and fillet area on the 40 spline axle is huge. Much bigger then the 35 spline axle. This is where they say axles brake on street cars, so I'm not so sure the 40 wouldn't have an advantage... Also, the Mark Williams pro street axle makes this area (fillet) larger too.(hence ready for street duty...and I think they use their race alloy etc....they just make it the larger size in that area...........just like the 40 spline strange axle.....)

My thinking is that I would rather have the bigger axle and large fillet area and avoid the big pot holes.....

[Maliboost]

pardon my ignorance, but how is a pot hole differnt than a 6000 RPM transbrake launch? is this the difference between sheer strength & torsional strenghth?

bob

[Jim Filipowski]

pardon my ignorance, but how is a pot hole differnt than a 6000 RPM transbrake launch? is this the difference between sheer strength & torsional strenghth?

bob

Yes you answered your own ?

[PhilM]

Thanks for the replies.

Phil

[Maliboost]

Yes you answered your own ?

Doh, I hate it when that happens. I suppose I should be putting brain in gear B4 mouth.

Bob

[Ed-vancedEngines]

The Strange Engineering race axles have little ductability. They will not give. They are brittle and an break when subject to street driving stress. They are claiming to now have a street axle.

The Mark Williams axles are by design made to be resilient with good ductability and will work very well in street applications. Fact is Mark calls his axle tempering process an Austempering which actually gives it a memory to return to the original shape. With the Mark Williams axles on a hard launch the axle will slightly give and will not break as you are applying less torque the metal will return to it's home shape. Mark calls it Metal with a memory.

The Moser Enginering tempering process also adds ductability to the axles so they can also slightly flex while in use without breaking.

Hope thois helps some.
Ed