Last post on Oct 12, 2006 at 4:26 PM
You are in the Chrysler Pacifica Maintenance & Repair
What is this discussion about?
Chrysler Pacifica, Wagon
Sep 28, 2006 (3:29 pm)
May I ask why you need it to rev any faster than that?
Even my lawnmower has a governor on it.
Same but with computer control.......good idea
Keeps someone....(hint) from blowing up the motor.
#2111 of 2119 Re: OK......so........ [primetime2628]
Sep 29, 2006 (6:32 am)
you are not going to blow up the Pacifica's engine by revving past 2500 rpms sitting still (that is, if you were allowed to).
It already has a rev limiter to protect the engine ... it is at red line.
but, no, i don't necessarily need to rev past 2500 sitting still. I only discovered it when trying to jump a dead battery.
#2112 of 2119 Re: Engine RPM limiter [qbrozen]
Sep 29, 2006 (7:06 am)
#2113 of 2119 Re: OK......so........ [primetime2628]
Sep 29, 2006 (7:10 am)
If you ever fix a car engine you will understand why I'm asking about this rpm limit.
#2114 of 2119 Re: OK......so........ [qbrozen]
Sep 29, 2006 (9:09 am)
The purpose it to save the transmission in case one were to shift from P or N to a drive gear over 2500rpm.
Even increasing RPM for more alternator current (jump startign another vehicel) should not need more than 2000rpm.
So, what's the point to revving in neutral on with an automatic tranny?
#2115 of 2119 Re: OK......so........ [aaron_t]
Sep 29, 2006 (9:11 am)
what's the point to revving in neutral on with an automatic tranny?
i already said its not necessary.
Sep 30, 2006 (12:46 am)
Ok arrie, I do know the reason, I was expressing more the how. And yes I've rebuilt engines, carbs, and most other parts of a car. Safetys are built in all over. I guess that did come across as a little sarcastic.....sorry.
Just looking for some answers on my audio problem....thought I'd chime in on this one.
#2117 of 2119 Re: Engine RPM limiter [arrie]
by MrShift@Edmunds HOST
Sep 30, 2006 (11:31 am)
revving up an engine in neutral to high rpm can be quite risky...the engine has "load" (it's not doing any work) and at higher rpm the forces acting on the pistons are tremendous. So a rev limiter that prvents accidentally winding up the engine in neutral is a good thing.
#2118 of 2119 Re: Engine RPM limiter [Mr_Shiftright]
Sep 30, 2006 (2:21 pm)
A lot of noise for nothing!
Did you guys think about what I wrote in my post?
I was just asking if the behavior that I explained is what it is supposed to do.
I already guessed that it is correct behavior obviously to protect engine from unnecessary high revolution speeds. Just wanted to run it by to make sure others do the same.
This is the first car I have owned that has this feature though. Usually it is just the upper limit at around 5000 - 6000 rpm, if any.
And yes, high engine speed causes high forces on piston, push rod and crankshaft and it does not really matter if there is load on the engine or not. It is just a matter of the engine speed.
Oct 12, 2006 (4:26 pm)
Please go to the Chrysler Pacifica group top level and create a discussion that fits your comments/questions or post in an existing discussion.