steel or aluminum driveshaft?

[Bill Diehl]

Originally Posted by Jim Caughlin

Same issue with lightweight rearend parts, gundrilled axles, alum spool, lightened ring gear, no noticable improvement. On the other hand, lighter weight flywheel and clutch made a huge difference. In my case, this is a 4 cyl motor that crosses the finish line at 9200.

If any gains are to be had you should see it by using all the parts.


You have met the required parameters.... rpm, 4cyl power, ect. all those "should" improve your performance, results speak louder than theory though

[magnumv8]

Mark...go to the Mark Williams website and look up "critical speed"..... while a performance improvement is nice you need to spec out your driveshaft based on your trap rpm you achieve.....the diameter and material type will be decided once you have your shaft length and trap rpm....


as an example for my stocker build I needed a shaft 54" long and needed to handle at least 7000 rpm and since it had to be steel I required a 3.5" chromoly shaft.....while aluminum can give you a higher critical speed it is less durable.....


D L Rambo.....Stk 1300