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ok ok, this is not a newbie question, and I know about redline being the limit RPM the engine can do without damage, it's just a question out of curiousity I have, our cars cut off at 7100RPM, of course this can be adjusted by changing the governor to like redline at about 8000RPM, but this will hurt our engines

my question is, if 7100RPM is the limit of our engines, why put the redline all theway to like 9000 or 10000RPM, what is it there for???? why not put the end of the meter 7100RPM instead of all the way to 9000 or 10000???? [IMG]i/expressions/face-icon-small-confused.gif[/IMG]

 
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im wondering the same thing since i never drove a stick car..but i have a auto and i reached 7k rpm before..but i have no clue what the red line does..so help uus out!

 
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The redline on a car is, typically, about 300-1000rpm before the "true" redline. The true redline is where an engine encounters its mechanical rotational limit. If it is revved beyond this barrier, it could come apart...it'll throw a rod, some internal gears will break, pistons will seize...you get the idea. So the redline you see on your tach is merely a warnuing zone advising you to back off the throttle, lest you over-rev and destroy your engine.

You can sometimes increase the redline--or the threshold of the warning zone--by electronic tuning. If you reprogram or replace the EPROM chip inside the car's ECU, one of the modified parameters is this redline.

 
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ohhh...I see...thanks a lot man!!! I can always say I'm a little bit more wiser thanks to guys like you.... cheers! [IMG]i/expressions/face-icon-small-cool.gif[/IMG][IMG]i/expressions/beer_yum.gif[/IMG][IMG]i/expressions/beer_yum.gif[/IMG]

 
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You're welcome. If you want a better understanding of how your engine works--or any engine, really--check out this site.

 
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Unless you get new engine internals like new valves, pistons, rings, cams, crank shaft, fuel rail, etc you should not change the redline governor.

 
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Good post.

Also fire can come out of your exhaust if you get on it too hard.

And your post also brings me to just point out the Acura NSX. From looking at the dash, it looks like it redlines at 8,000 RPMs right? You can actually safely push it up to 8,700RPMs. For the Integra Type R, I heard an owner of it was able to push it to 8,600RPMs (it redlines at 8,400 just in case anyone didn't know that). It might be able to safely go a lil' further.

s2000man01 seems to go a lil' beyond the redline in his s2k - I forgot how much.

If I'm racing a car, I seem to always hit the rev limiter with redlines just below 7,000. Last night, I discovered that there's one on my buddy's 94 Supra... which redlines at 6,900RPMs.

 
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several ppl sware there fuel cutoff on the 2k1 is 7500rpm, but I wouldnt know, mines an auto. My Si redlines at 8200, and there is no "governor". If you want to change your redline, get a diff ECU program or ECU, but be prepared to upgrade your engine parts unless youd like valve float or the engine to just give out on you.

 
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fuel cutoff seems to be at 7,100-7,200 for me. I dont see how they can bring it to 7,500..

I wasn't paying and forgot to shift, thats how I discover it. heh.

 
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wow....my post still alive...?anyway!! I don't get it, how can different 2k1's redline at different RPM's...aren't they mass produced?? they should all be the same...excluding the canadian Si/Ex... hmmm [IMG]i/expressions/face-icon-small-confused.gif[/IMG][IMG]i/expressions/face-icon-small-frown.gif[/IMG] I have an auto too...like CapYoda, my redline's at 7100 that's when I pop it to 2nd and just push it to see how far it goes...but the car shifts at 6900RPM [IMG]i/expressions/face-icon-small-tongue.gif[/IMG]

 
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Our cars can't go 150mph but you're not saying anything about that.

 
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very good info on this topic,most of us think the higher u rev the engine,the more power we will have,not true.we cant go over or close to 150mph is that we dont have enough hp.for cyclosporine,,, the governor inside the transsmision determind when to make a shift even u maually change the gear(for ur wallets sake)..for u techno guys out there here is something i found,127 hp at 6,300 rpm... 114 lb torque at 4,800 rpm,oh for those with stick shift,,dont need to rev it sky high to launch ur car cus it will just sit there and get ur feelings hurt,stick shift is not popular at all on a drag strip cus they dont run consistance time,for the guys need more top end speed,,i cant help u much but u can do most of the induction mods to gain a few ponies.