jono20

...but does it matter whether you're free revving, or under load?

Omixeo

iTrader: (1)

No. But doing it while you are driving is more fun .

Madrx7racer

^^^yes..............under load to clear any carbon deposits........

mikaz

Free revving in neutral probably does more harm than good.

Omixeo

iTrader: (1)

Why?

RyoFC3S

iTrader: (1)

Should be.. "A redline a day keeps the carbon away!"

RETed

Doesn't matter...
The rotors are spinning at the same RPM's whether under load or revving in neutral.


-Ted

CokeRx7

I say red line it! twice a day.. in the morning goin to work and in the evening before you settle in the house.. red line 2nd gear.. cuz 3rd will take you around 90-100mph.. (ive done it several times.. :-D)

airworks-fc3s

do it! but do it under load!

it's more stress to the system doin' it in neutral, 'cause the mechanical components are not under a sort of working pressure that gives them less clearance, they are just free moving and under no load, meaning they are likely to sort of shatter!

compare it to a dirtbike: lots of people say; "don't redline your little twostroker in neutral, 'cause it's under no load, giving it too much wear!"

take it or leave it...

jouslee

yea, my car feels healthier after i redline, i ususally do it or twice a week, just to take it easy on the gas

Turbo II

iTrader: (1)

i'm sitting here trying to think what's the longest i've held it at redline or better with the buzzer going off... so many times, so much fun... better yet is keeping it tached up around there running around a track or through the twisties all day and hearing it go off all the time!

slpin

iTrader: (9)

there is no problem reving it in neutral
you are a retard if you think it does damage
there is less load on the motor, how does that create more stress?

it is just easier to over-rev, thats when the problem comes out....

CyborgRyu

iTrader: (8)

not recommended for boosted folks! I get near it, but not into it.

brio125

i'm afraid that i'll blow up the engine with boost at redline, that or fuel cut. 6500 absolute max for me.

duc lover

iTrader: (4)

To clearify what airworks said about 2-strokes (dirtbike):
The reason you don't want to rev a 2-strok in neutral is because they have no rev limit and just keep building pressure until they either blow apart or sieze form heat. Unlike a 2-stroke there is a rev limit on the rotary. where the 2- stroke will just keep reving (insted of stoping at 8k rpm they will go in an excess of 21k rpm or when ever the sieze).

airworks-fc3s

ok let's clarifiy some things:

1. to duc lover: a dirtbike with a twostroke motor doesn't have a rev limiter, very correct!
but: the two stroke engine on a dirtbike usually got a ignition box controlling timing of the spark. to provide a rather useful powerband on these stingy motors the timing is adjusted automatically throughout the whole rpm band, meaning the timing is started with quite early sparking then consequently continuning to go late as rpm rises, 'cause the engine is in need of late timing as high rpm is given. at a certain point (depends on manufacturer), the ignition box is no longer taking timing back (earlier) due to no more performance gained (about 12'000rpm) this naturally prevents the engine from overreving! the only problem you'll have with redlining it for a longer period of time is the twostroke motors tendency to lean out at wide open carbs... but please; i thought we were talking about redlining, not holding the engine at its full rpm for minutes! (fyi, i worked for KTM about 3 years)

2. thanks slpin for calling me a retard... maybe you can't imagine but it really does make a difference if you rev you engine reely (neutral) or under load. excuse my rather non-professional language (maybe due to english not being my native tongue) but i'm trying hardly: the free reving (and shattering into redline) engine has no opposing force/ no "work" decelerating it, there is nothing held against the forward going force of the internals -> the effect is, that ist sort of shatters internally. 'cause all the different moving parts in the engine have some (yes quite small, but there) clearances, so under load these are held towards one direction (revolution forward, against load trying to decelerate it), under free rev (with redline) the clearances are sort of thrown from one direction to the other -> shatter!
so this would not mean immediate damage, it just does harm all your internal components... try to imagine, otherwise forget it and think of something easy!

thanks guys...

drft_180sx

^ Anyone have any hard proof of this? Especially cause i don't think i understand the shattering concept?

duc lover

iTrader: (4)

I respect you for working on KTM's.
Even if they are my rivals!

thanks for the extra knowlege!
but on every 2- stroke i have worked on, they have never had an ignition box only a crank sensor/magnito that sends a signal to spark the spark plug.
i know this was off topic.
But like i said i still respect you because KTM makes some really competive bikes and are defnitaly on the cutting edge, so this might be why i have never seen an ignition box on a dirt bike.(but they do have them on streetbikes)

Terrh

iTrader: (7)

8000RPM once a day, every day.

(actually usually it's 20 or 30 times a day, heh)

StarScreaM2k1

does redlining more then once a day actually have any detrimental values to the engine? (esp. on a turbo). I assume this is for a stock motor, but what about one thats been ported? and has a larger turbo on it?

88durel

iTrader: (4)

isnt redline set on a stock motor for a reason.....

that buzzer is telling you to shift because your going to blow somthing, just like the low coolant buzzer, but its louder for a reason.

i redline no more then 1000.... maybe 7.3k rpm

and i do it only when im next to a civic/accord/300zk/elcipse

whatever else has big coffee can mufflers that sound like ****, and a driver that rev's with the clutch in driving down main @ 60... just cuz they did it on Fast and the Furious...

Secondmessiah

dude, redline in most cars (especially rotaries) is a fair margin below causing actual engine damage, if the car is in good repair, then redline will be fine

i have been know to shift at 7500 rpm (yes thats 500 past redline)

Turbo II

iTrader: (1)

After redline on most "stockish" sevens there is nothing to gain. I've hit 8K a few times and lived at redline or better running events with my Turbo and my Vert sees redline at least twice everyday. If you're going to run your car in that range you want to take the basic precautions and do the dependability mods on your car.

CokeRx7

Well ported engines.. you already deteriated ya engine life in half.. especially wit a turbo.. you basically have a short life on ya engine..

but red lining isnt that bad.. it helps to make sure everything is running properly.. i had to kick out an extra 200 bucks cuz the previous owner didnt red line the car enough.. so i had to get new injectors, Pineapple racing sleeve inserts and had to clean out the wholes and everything.. its alot easier to just red line the car..

StarScreaM2k1

how did i cut my engine life in half? and with a turbo even more?! this total news to me. how do you know this? any proof?