Thread: redline??limiter

You might want to find the redline for the PAS pump first - that's usually the first thing that goes 'pop'.

Don't ask me how I know though .

99 views and only one answer that now has me worrying when my PS pump will grande itself :-) this donk does mind a good rev but an answer would be good as to much of a good thing is not always good for us ..Gary

the limiter is usually the valve bounce.

I have never had valve bounce in my 3.5 or 3.9. I usually chicken out and back off or change gears once it doesn't sound like a V8 anymore, it becomes a loud continuous scream.

Originally Posted by Gary S11

After reading MSD l've often wondered what is the red line on a 3.9 and do they have a rev limiter like most EFI motors ..My Disco certainly revs a lot freer than the 3.5 in my ex 84 RR ..Gary

Vehicles with hydrauclic tappets usually are limited in revs by the "pump up" action of the lifters. eg: the lifters cannot expel or take in any more oil, thus causing the valves to remain open a bit on each stroke of the piston therefore not allowing proper compression. This then limits the revs of the motor.
I've had my 3.5 out to 5500rpm and would not like to do it again as it sounded terrible. Bob

You ant herd nothing till you hear me red 186 in me ski boat dance them valves

Originally Posted by stig0000

You ant herd nothing till you hear me red 186 in me ski boat dance them valves

Just remember that rods escaping the block, will take out limbs ..

Originally Posted by BigJon

I have never had valve bounce in my 3.5 or 3.9. I usually chicken out and back off or change gears once it doesn't sound like a V8 anymore, it becomes a loud continuous scream.

Same here ... I don't see anything usefull after about 4800

Originally Posted by mike 90 RR

Same here ... I don't see anything usefull after about 4800

Nothing useful after 4800, but I have seen my tacho needle heading well towards 6000.... I needed it to get up a big sandhill.