Driveshaft 3.5 or 4 what's the difference

[Racerx009]

Hey guys I have a 2017 mustang gt N/A with 3.73, long tubes JLT CAI. I am thinking of doing the driveshaft 3.5 or 4 inches. Which would be better and why??? Or don't bother doing it at all. Thank you

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[BmacIL]

All else equal, the 4" will be stronger, but will be heavier.

 

[Racerx009]

All else equal, the 4" will be stronger, but will be heavier.

Thanks for replying just trying figure out also if it's worth it for me since I am N/A but have all the mods done

 

[whatsup62]

It was the best mod I did when NA. Gives the car a much better response to pedal feel. You also shave off about 17lbs of rotating mass.

 

[Racerx009]

It was the best mod I did when NA. Gives the car a much better response to pedal feel. You also shave off about 17lbs of rotating mass.

Thank you for your input I will be buying one

 

[69mach1-395]

CF saved the weight, not the diameter. In general it has to do with shaft rpm...larger diameter will vibrate less at higher rpm IIRC.

 

[whatsup62]

1. CF saved the weight, not the diameter. In general it has to do with shaft rpm...larger diameter will vibrate less at higher rpm IIRC.

   Are you referring to my statement? I did not run a CF shaft when NA. I ran a Aluminum Dynotech shaft (which I would highly recommend over the others out there). Believe the stock shaft and center support was like 34lbs and the new Dynotech was like 17lbs.

 

[69mach1-395]

Well I wasn't sure if the OP was thinking of CF but you provide good info for sure.

 

[Racerx009]

Well I wasn't sure if the OP was thinking of CF but you provide good info for sure.

Thanks for the info I will be going with the 4in aluminum.

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