>>>>>>it's got about 185000KM on it and I was wondering if I should push it
>>>>>>hard. The engine is still silent. The last 40K were all highway
>>>>>>driven and have had Synthetic oil used. >>>>>>>>>>>
So long as the car shows no signs of deterioration(ie-- burning oil,
excessive blow-by, weird noises from the valve train, unreasonably low gas
mileage, etc) I see no reason why you can't push it regularly. The factory
sets the parameters in the ECU *very* conservatively, which helps prevent a
lot of potential damage (ie-- conservative timing maps, rich A/F ratio, low
red-line), so as long as you are careful about proper maintenance, you
should be fine. My car had 94K miles on it when my father gave it to me, and
it now has 135K. Granted, all the miles my father put on it were very
gentle, but my car runs like a bat out of hell. The more mods I add, the
more power I bring out of the engine with no signs of damage or
deterioration. My gas mileage is still quite good, even with my "spirited"
(Ahem...) driving style and mostly city miles. Nothing has ever broken, nor
does any component seem to be in anything less than optimal condition, with
the possible exception of the piston rings, as I seem to be gettting an
awful lot of blow-by, but from what I understand, all Nissan engines do
that, regardless of their health.
In short, do some diagnostics, make sure the engine is healthy, and if
everything checks out, go have some fun!
>>>>>>Since I don't currently have a tach installed I have know way of
>>>>>>knowing if my limiter is working.>>>>>>>
The rev limiter is controlled by the ECU, so if it somehow stopped working,
your whole car would probably be functioning very erratically, if it ran at
all. Your rev limiter is fine.
>>>>>>It should be, it's just when I reach about 50K on first gear it feels
>>>>>>the car starts stops pulling>>>>>>>>>>
Since your car is stock, that's fairly normal. Do the intake/headers/exhaust
routine and you'll fix that problem.
Hope this helps,
JWolfe
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