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Old 05-12-2008, 05:54 PM   #1 (permalink)
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Default RPM'S What is the real redline

1992 1.6 8 valve the tach peg's at over 6000. hOW REALISTIC is that when
the little squirrels in there sound like they are ready to blow at around 4000
rpm's i would never redline mine.
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Old 05-12-2008, 07:01 PM   #2 (permalink)
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ecu has governor set between 5500 and 6000
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Old 05-12-2008, 07:11 PM   #3 (permalink)
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I've revved mine to 6700RPM. It's not the end of the world but it's hard on the engines long stroke and theres no power to be had up there anyway. It's pretty stupid to rev above 6000RPM in my opinion plus If you shift a 6000RPM the next gear falls nicely into the peek torque area.
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Old 05-12-2008, 10:11 PM   #4 (permalink)
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are you serious? mine sounds like it's gonna blow @4500RPM
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Old 05-13-2008, 12:18 AM   #5 (permalink)
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I guess I should mention mines a 16V but the 8V should still have know problem revving above 4500RPM.
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Old 05-13-2008, 12:44 PM   #6 (permalink)
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My 8v is auto so it shifts itself well under 5000RPM, my 16v is manual and I shift it under 3500 under normal driving and around 5000 when accelerating hard...
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Old 05-13-2008, 07:14 PM   #7 (permalink)
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on some ECUs there is no limit !so then end point is when the valves float.
the newer ones have this limit code and is not really an issue as the max torque and rpm are way below.
floating valves on a 16v engine can be dicy.

90-95-max torque is 3000-4000 (# of valves)
max HP is at 5400 to 5500

Grand Vitara can rev to 6500 before max HP is achieved.

as they say shifting at 3000 or less , saves a ton of gas.
shift quickly and with out overloading engine, gives max mPG,

I do not know how all ECU's cuts, RPM but on my bench tester it rolls timing retarded
soom after 6000 rpm, (91 FED ecu) on some other Canadian older ECU's behave completely different it seems. (lots of ECUS world wide)

my after market ECU one can roll timing or cut injection, any way I want.
but cuting timing is safest way. some have staged cuts, timing then if it 7000 fuel is cut like a light switch.
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Old 05-13-2008, 07:24 PM   #8 (permalink)
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I hit 6700RPM by accident on my old automatic. The tranny was on it's way and I thought it was going to shift but it was way late.
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Old 05-13-2008, 08:00 PM   #9 (permalink)
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digital tach or analog.?
most analog tachs are like speedo's, mostly ball park toys.

My other toys have OBD2 and the digital tach in the ECU differs greatly with dash cheap.
the ECU is dead right on.
fyi;
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Old 05-14-2008, 05:54 AM   #10 (permalink)
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funny story (well sort of) on the way home from work (I am a sgt @ the state pen)
i was crusing along and what sounded like a radiator hose blowing i thought well this
rig is toast it just so happened that a latch came lose on the top and wind was comming in making one heck of a racket.
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