mike73737

That's a very odd video. Does it die because all the coolant just boils out the top?

Socket7

Rules of the rotary #42: Thou shalt not fear the red line.

RotaryP7

If you won't redline.. There is no point in turning the car on.

VampireSix

So the point of a once-a-day redline is to prevent the carbon build-up on the last two ports by flicking them open and allowing air to flow through them, right? If they don't open until 6250 and 7250rpms, then I don't see how 4000 - 4500rpm highway driving is going to accomplish this.

Razz1

Jedi fears the redline.

Mu ha ha...............

zerobio

Not only do I love the redline, as the revs get up that's when I hear my exhaust belch, burp, and pop. Sounds so cool. Double bonus for redlining.

enforcer

I tend to do it every now again when I pull out onto the highway....just for a few seconds every week won't hurt it.

Musker

dude I have never chirped my tires in shifting gears. My car doesn't even HAVE traction control equipped, so don't tell me that's the problem. I shift fast and hard enough, but don't get chirping like I do in other cars.

O_o

what the heck?

mdw1000

04 and 05 ATs are 4-port. 06 and up are 6-port.

RedRocket8

The guy who did this to his RX7 doesnt love rotaries or deserve one for that matter. he should be shot.

rodjonathan

iTrader: (6)

it cant do any harm and it helps alot

Eish

Redline brigade, please answer me this simple question, where is credible proof of your theory? Mazda even put a rev limiter (a technical way of saying "this is too much, stop!"). Meaning they knew there are people out there crezzy enough to rev it that far, they are trying to stop them

JinDesu

iTrader: (2)

YOU don't have to redline your engine. That's fine by us. Just don't assume that a manufacturer, which has to deal with lawsuits, environmental concerns, and the general stupidity of people, will tell you it's perfectly fine to redline an engine.

Go ahead and don't redline your engine. In fact, go use that 5W-20 that the MNAO manual says to use. Don't premix either, the manual never mentioned that.

DeViLbOi

iTrader: (1)

The rev limiter on the RX8 was installed as a limitation of the transmission and not the rotary engine. While the RX8 in it's stock form can rev to 14K RPMs safely it was found that no measurable gains were delivered past 9K RPMs so the limit was brought down to there. For more information about this argument please read threads related to the removal of the rev limiter via the Cobb AP.

Eish

Jindesu, you are creepy, it's like you are reading my mind. I use 5W30 actually, Edge(the dealership put it, i will change it to Magnatec 15w40). I also don't premix. The only things I do are.

1. Fill up with premium
2. Top up with Magnatec
3. Change tyres whenthey are done
4. Wash and polish the car on weekends
5. And I just drive

That, my friend, is how an RX8 is supposed to be. No carbon buildup out of the blue. If you are having carbon buildup, check you oil, premix and all these other fancy mods that people install. You will find the problem and you will sort it out and have a "redline optional" drive like me.

JinDesu

iTrader: (2)

Unfortunately, since the engine uses oil, it will build up carbon. No matter what oil you use, it is a chemical product that does not burn as cleanly as it should. In fact, by premixing with certain additives, that helps clean out some of the carbon - just like adding those fuel cleaners or whatever.

The way the engine works is that it opens its ports at certain RPMS. The two ports that open at the higher RPM are still affected by this carbon buildup. If you don't open them regularly, then eventually the buildup will become so thick that it will never get removed.

Additionally (and I'm not sure if all RX-8's need this), higher RPMs help to clean the trailing spark plugs. Those plugs can become fouled from running your engine at lower RPMs at a long time. That one is caused by the engine not burning as much of the gasoline as it should in the lower RPMs, I believe. Someone can correct me on that if I am wrong.

To re-cap, if your engine burns engine oil, then it will leave carbon (ash). There is no logical reasoning for why it wouldn't leave carbon. Even gasoline has residue when you burn it. Why this affect a rotary engine more than a piston engine (a question you brought up in another thread) is because the rotary engine burns engine oil directly in it's combustion chambers. It just does, carbon will build up, you might last 50k, 80k, 100k with the carbon build up, but it will never last as long as if you red-lined it.

Afternote - I am in no way trying to put you down, my previous post sort of had that tone. I am just saying, manufacturer's do NOT put their product's best interest first. What comes first to the manufacturer is money, legal concerns, and political (environmental) concerns. That is why your manual will not give you these information.

jefecito87

iTrader: (3)

first ahnd experience here i been driving slow lately freaking gas plus i been lazy and been around town a lot and when i went on the highway and felt like crappp like literal crap i hadnt hit redline in like a month i beat the crap out the car stayed a redline and on the return trip from my gf house i got on and felt like new again redline is your friend and i missed that beep so much plus the car is louder my friend noticed i pulled up to his job and said it was louder then the pevious day i saw him and knew i had been beating on it i will say it makes quite a difference when redline is touched

CarAndDriver

I try to redline everytime I drive it at least once. Even if it is more than once a day.

rotarybois

[QUOTE=mysql101;2148751]it's not going to harm the engine, but it might hasten damage to your transmission.

my syncros are now shot for 4th gear. When I get my new transmission in, I plan to keep it below 7k for the most part (which is fine because I make almost 300 whp at 7k). The transmission was not designed for this car - it's a modified tranny used in the miata.[/

you were supposed to by a manual, rx8s were never designed with automatic in mind

icemantbi

Redline it EVERY DAY! In fact, redline everytime you start from go.

EXCEPT! Do NOT redline until the engine is completely warmed up. In other words, when your temp gage is in the middle and then five more minutes after. Thats the only time you need to baby it.

Thats what I have done, car is still running extremely well with 75K miles on the original engine. Oh, and premix with Idemitsu

Jedi54

iTrader: (7)

redlining is probably good for the engine (at operating temps) but as has been mentioned, it could be detrimental to the transmission.
some of the synchros are a bit delicate and a misshift at 9,000 rpm's from 1st to 2nd is pretty rough on them.

wcs

iTrader: (2)

It's likely just me reading something in to this thread that isn't there, but my general impression is that I believe people think the rotors are rotating at 9k rpm.
Which isn't true it's only the eccentric shaft that is rotating at that speed.

I hear you on the syncro's @Jedi54 , mine are not in the best shape.
Been nursing those syncro's for a few years now.