I finally got my 3200 RPM spring installed last week . . man, what a difference.

Here's some observations about my truck you guys might find interesting.
** 40 PSI boost gauge appears to peg at 20 PSI (figures)
** Boost gauge used to peak at 23 PSI & drop to around 16 PSI at shift point
** After spring, gauge pinned at 20 psi & stayed at 20 psi to 3300
** After spring, truck smoked all way to 3300, till I upped boost setting
** Before the spring, truck left a puff & cleared as revs climbed
** Turbo spools much faster now than before
** Truck leaves a puff of black & clears up on full throttle with over 20 PSI
** Stock converter gives 2800 stall on this combo
** Truck will now burn tires from a slow roll
** Engine is much more responsive now
** Truck has no problem running 65 - 70 mph in 3rd gear

Over all I like the result, transmission even shifts better . .no more hanging in low when cold because shift point is higher than governed RPM at light throttle. The truck is simply much more enjoyable to drive.

 

thats the best 20 bucks a guy could ever spend

 

I was amazed after I replaced mine. What a difference a few hundred rpm can make!