bigdman Posted January 30, 2006 Report Share Posted January 30, 2006 is the underdrive pulley from a 3100 the same size as a 3.1? Quote Link to comment Share on other sites More sharing options...
chadz34 Posted January 30, 2006 Report Share Posted January 30, 2006 I believe so. Quote Link to comment Share on other sites More sharing options...
TeeJay3800 Posted January 30, 2006 Report Share Posted January 30, 2006 They are different parts that mount differently and are not interchangeable, but both FFP pulleys are of the same diameter. Quote Link to comment Share on other sites More sharing options...
dbtk2 Posted January 30, 2006 Report Share Posted January 30, 2006 is the underdrive pulley from a 3100 the same size as a 3.1? 3.1 and 3100 pulleys from FFP are identical. They are both 18% or 19%underdrive IIRC and they CAN be interchanged. Shawn Quote Link to comment Share on other sites More sharing options...
TeeJay3800 Posted January 30, 2006 Report Share Posted January 30, 2006 Yeah they are, my bad. I was going off this pic and at a glance they looked different. http://www.fastfwdperformance.com/images/products/udp/ud-3-big.jpg Quote Link to comment Share on other sites More sharing options...
digitaloutsider Posted January 30, 2006 Report Share Posted January 30, 2006 2.8/3.1/3100/3400 are all interchangable (FFP). Quote Link to comment Share on other sites More sharing options...
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