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Before shutting off your RX8

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Old 05-09-2008, 05:44 PM
  #51  
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I put a sponge in the air box, to prevent flooding.
Old 05-09-2008, 05:50 PM
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Originally Posted by bxb40
If cold outside, I rev to 4-5000 after parking, let off the accelerator and turn it off about the same time. I never had to shut the engine off when not fully warmed, so cannot comment on the usage to prevent flooding. The injectors and accelerator are electrical, so when the key is off, those are off too (hence useless to push the pedal after the engine is off - on RX8 at least). The oil pump is mechanical, hence it does not care about ignition off or not - lubrication and oil pressure depends on RPM, no issues to rev when engine is off. If thinking of the oil metering pump - it rarely injects oil anyway, so it does not matter.
Does it help anything? Probably not, but it cannot hurt either, so I consider this "prevention." Just like premix and many other quirks learned since owning the RX8 for 4 years... Don't care what people think - if the car needs it, the car gets it :o) But that's just me.
Ah, I see. I guess there's no need for me to step on the accelerator when I turn off the car while in rev. I do the same thing, 4500-5000 RPM, turn off the car, watch as the RPM drop besides the fact that I plant my feet into the accelerator.

Thanks for the info.
Old 05-09-2008, 05:51 PM
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Originally Posted by 4me2
I put a sponge in the air box, to prevent flooding.
I pour sand into my intake so I can port-and-polish my internals. This prevents flooding too.
Old 05-09-2008, 05:53 PM
  #54  
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Originally Posted by Renesis SE3P
I use to do that until I notice Yoshiya (Owner of Neptune Speed) stepped on the gas after he shut off the car while in rev. So my question: Which method is better?

P.S. It makes a cool intake suction noise when punching it after turning off the car while in rev.
i bet tats just the sound of normal intake, u just only hear it when u do this because the engine stops exploding and you can actually hear the intake.
Old 05-09-2008, 07:11 PM
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Originally Posted by invasion08
I have owned my RX8 since 2003 and this was the first time a heard the mazda dealer say you should rev the engine before shutting it off
No offense, but shouldn't you learn about the car yourself instead of listening to the dealer? They are glorified salespeople anyway. At least I don't expect store clerks to teach me how my TV work, and I don't care how much they can repair of it :P It surprises me how little interest people have in an expensive possession. I have read a million things about this car and haven't even got it yet. People are different though.
Old 05-10-2008, 02:09 AM
  #56  
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Originally Posted by Renesis SE3P
I pour sand into my intake so I can port-and-polish my internals. This prevents flooding too.
I add Clay bar at every fill up so I can clean the internals and keep them silky smooth.
Old 05-10-2008, 01:59 PM
  #57  
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i add jet fuel at every fill up so the rotary will spin faster
Old 05-10-2008, 04:07 PM
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Originally Posted by To be named later
I add Clay bar at every fill up so I can clean the internals and keep them silky smooth.
seriously? and sand ? thats a joke right? never heard of it.
Old 05-11-2008, 06:56 PM
  #59  
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Service people told me that as well, said that "the car was not meant to be driven by grandmas" and needed to be rev'ed a lot. I don't do it unless I'm only moving my car around the driveway, otherwise its always warm from the drive. If you lived in a colder climate I could see this being a problem though. Good luck!
Old 05-12-2008, 11:23 AM
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Originally Posted by Renesis Menace
seriously? and sand ? thats a joke right? never heard of it.
Yes, it's a joke. Don't put stuff in your intake.
Old 05-12-2008, 01:08 PM
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Originally Posted by dmc27
Yes, it's a joke. Don't put stuff in your intake.
damn... too late. better change my oil tonight no wonder i was blowin out glass vases thru my exhaust pipes everytime i hit 8k rpm.

noticin difference now with the high rev least once a day. starts up easier now.
Old 05-12-2008, 01:26 PM
  #62  
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I rev it up to about 3-4k, let off throttle then at that same moment turn the car off.
Old 05-12-2008, 01:32 PM
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Originally Posted by Detrich
not to be insensitive, but do none of the newbies read the quickstart guide and/ or owners manual... at all?!!

all the basics are covered in that quick little pamphlet that takes less than 5 min to flip through. mazda also provides a DVD with each rx-8.

good grief.

we were all newbies at some point. but, some of us know how to turn a page... or pop in the DVD- which btw also takes less than 10 min to watch.
I never got a DVD with my 06!
Old 05-12-2008, 01:37 PM
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sponges, sand, jet fuel! This thread is really entertaining!
Old 05-12-2008, 02:39 PM
  #65  
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Originally Posted by yale02
sponges, sand, jet fuel! This thread is really entertaining!
Its making my head hurt. A LOT.
Old 05-12-2008, 06:37 PM
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I think you guys need to note that if you are just revving your car like that, that you should have the clutch disengaged, it is bad for the transmission when you are revving it in neutral.
Old 05-12-2008, 07:51 PM
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I've been hitting 6K or higher and then killing ignition as the rpm drop. It doesn't smell so good. Almost as if something is burning or has melted. Same thing happens when rev to redline 3 or 4 times in a row.

Last edited by User24; 05-12-2008 at 07:56 PM.
Old 05-12-2008, 11:27 PM
  #68  
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Originally Posted by fahrfegneugen
I think you guys need to note that if you are just revving your car like that, that you should have the clutch disengaged, it is bad for the transmission when you are revving it in neutral.
Those aren't always the same thing: when my car is in neutral the clutch is usually disengaged (for example, right before stopping at a red light I typically put the car in neutral, disengage the clutch, and then use the brakes to stop; I don't put the clutch in again until the light changes). So is it bad to rev in neutral, or bad to rev with the clutch engaged?
Old 05-13-2008, 12:15 AM
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Bad to rev with the clutch engaged because then the transmission is connected to the engine and it is not made to do 9k in neutral.

Of course, you get that nasty electrical burn clutch smell anyways if you do it a couple of times anyways like user 24 described.
Old 06-15-2008, 02:07 PM
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All this time I experimented with the rev before shutting down, even though the car is fully warmed up. Sorry, but it does nothing. Rx8 is much better off just twisting key in the ignition to off, if it is already warmed up. However, if the car is not really warmed up yet and for some reason you're late to work and must shut it down immediately, then 3000 for 10 seconds is the proper procedure to reduce the chance of floodz.

Once again the dealer employees have misunderstood rx8 treatment, in your situation.
Old 06-15-2008, 04:52 PM
  #71  
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hmm, i was told it was VERY bad to rev the rx8 up right before shutting it off.... something about some part of the engine getting warped
Old 06-15-2008, 11:12 PM
  #72  
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I add a mini-key chain size Etch A Sketch® with every fill-up so I can get
a picture of the condition of my rotors and Apex seals.
Old 06-16-2008, 12:51 AM
  #73  
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I sprinkle black pepper right under the engine bay each time I park the car. Gets rid of the juju man. Which reminds me time to visit the spice store again!
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