Re: Idling at 900 RPM

["David Teitelbaum" <jtrealty@xxxx>]

Just guessing on this but not only was the idle set low for emmisions,
it also makes it easier to shift into 1st gear (and is easier on the
torque converter on an automatic). This was probably done because the
gear ratios are different in the Delorean than other applications. The
low idle speed does cause a problem with running too much electrical
load at idle. For instance at night with the lights on, the A/C
running and the cooling fans, it is too much. The quick and dirty
work-around would be to change the pulley on the alternator to a
smaller one so it turns faster at the lower idle speed. The problem
with that is you are going over the safe RPM limit when you rev the
motor up. This usually isn't a problem, there is enough of a safety
factor built in but you are pushing the upper limit and probably will
wear the brushes and bearings out a little faster. The problem is
compounded if you have an old battery, it can't handle the short
periods when idling in traffic so the motor could die if the voltage
drops too low.
David Teitelbaum
vin 10757


-- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote:
> 900 RPM is Volvo idle spec for B27 and B28. 
> 
> Wonder if DeLo lowered for US emissions?
> 
> Bill Robertson
> #5939
> 
> >--- In dmcnews@xxxxxxxxxxxxxxx, "John Hervey" <john@xxxx> wrote:
> > If your alternator is dropping low enough in voltage to turn on the
> battery,
> > then that's to low. At that level you can go below battery voltage
> and the