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RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.
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View Poll Results: Which one would you get for your 8?
TurboCharger
55.07%
SuperCharger
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Multiple Choice Poll. Voters: 138. You may not vote on this poll

Turbocharged or SuperCharged?

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Old Apr 21, 2009 | 04:44 PM
  #151  
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Life begins @ 30 psi
 
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I've been trying to figure it out since I first saw your posts, and I just can't come up with a good reason for why you bother posting. Thus far I've never seen you post something remotely useful or helpful. If you want to contribute to this thread thats fine, by all means... but going to every thread that catches your eye and talking about what you do not like is not a constructive contribution to the forum.
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Old Apr 21, 2009 | 04:47 PM
  #152  
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^ +1
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Old Apr 21, 2009 | 04:53 PM
  #153  
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Originally Posted by renesisgenesis
Ok, you said INCREASING the power by 160%. That is 603 flywheel bhp. Please don't pretend you didn't screw that up. I know it is not important, but come on now..
Uh. You fucked up... 232hp X 1.6 = 371.2hp to the flywheel. There you go.
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Old Apr 21, 2009 | 04:54 PM
  #154  
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Originally Posted by blackenedwings
I've been trying to figure it out since I first saw your posts, and I just can't come up with a good reason for why you bother posting. Thus far I've never seen you post something remotely useful or helpful. If you want to contribute to this thread thats fine, by all means... but going to every thread that catches your eye and talking about what you do not like is not a constructive contribution to the forum.

Hey... I don't help much either
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Old Apr 21, 2009 | 04:56 PM
  #155  
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Originally Posted by shazy
Uh. You fucked up... 232hp X 1.6 = 371.2hp to the flywheel. There you go.
His sole contribution has been pounding the variation between 232 x 1.6 vs 232 x 2.6 (100% + 160%)...

Generally I am a stickler for words and getting the right ones, but no need to be-labor a point so trivial. Mathematically challenged people probably shouldn't be doing their own tuning anyway

Originally Posted by shazy
Hey... I don't help much either
There is a difference between 'not helping much' and 'actively spreading discord'. Your fine

Last edited by RIWWP; Apr 21, 2009 at 04:59 PM.
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Old Apr 21, 2009 | 04:58 PM
  #156  
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Originally Posted by shazy
Uh. You fucked up... 232hp X 1.6 = 371.2hp to the flywheel. There you go.


omg people this is 6th grade math...


INCREASING by 160% is 232 x 2.6 = 603. MULTIPLYING by 160 % is 232 x 1.6 =371.

INCREASING by 60% is 232 x 1.6 =371.

wow......


I must be higher than I thought
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Old Apr 21, 2009 | 05:00 PM
  #157  
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Originally Posted by renesisgenesis
I must be higher than I thought
Congratulations. Maybe that is why you are looking down so much.

Don't fall!
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Old Apr 21, 2009 | 05:06 PM
  #158  
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Originally Posted by renesisgenesis
Well, obviously if the only thing we know is that doing a certain something increases power by 60 percent (I don't think you meant a 160% increase, because that would be about 603 flywheel BHP.....) then yes that would be a good idea, but of course that certain something can create all kinds of unwanted side effects. You did not even mention the loss in drivability, throttle response, and of course the unwanted extra stress on your motor, transmission, etc. Bottom line is simple: I don't trust adding FI to a car which was specifically designed as NA. The rx7 is turbo, the rx8 is not.

don't get me wrong, I LOVE turbo, but only in rare cases.

F40 anyone...?
Sounds like you need to go for a ride in a SC 8,,, has absolutely the same responce driveability and throttle responce of an NA Rene, just with oodles of power...
Edit- let me just say that an NA Rene may even have more of a "lag" feel with its power really coming strong from 6K up, as where I start making noticebly strong power around 3300-3500 rpm,,,

Last edited by Rotr8; Apr 21, 2009 at 05:11 PM.
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Old Apr 21, 2009 | 05:08 PM
  #159  
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From: Eugene, Oregon
Originally Posted by blackenedwings
I've been trying to figure it out since I first saw your posts, and I just can't come up with a good reason for why you bother posting. Thus far I've never seen you post something remotely useful or helpful. If you want to contribute to this thread thats fine, by all means... but going to every thread that catches your eye and talking about what you do not like is not a constructive contribution to the forum.


Offering what one does like or offering what one does not like are equally valuable and useful to others. If I make 200 negative posts, and 199 of them are useless, that means I still posted 1 thing negative that is actually useful, so in that respect my presence does have value. I am sorry if my negativity is bothersome, but that is simply the character I bring to the forums. It is up to the users to sift thru and use all the helpful posts from a vast array of differing opinions/thinking styles.
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Old Apr 21, 2009 | 05:11 PM
  #160  
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Originally Posted by renesisgenesis
It is up to the users to sift thru and use all the helpful posts from a vast array of differing opinions/thinking styles.
Must you make it so painful for us though?
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Old Apr 21, 2009 | 05:13 PM
  #161  
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Originally Posted by Rotr8
Sounds like you need to go for a ride in a SC 8,,, has absolutely the same responce driveability and throttle responce of an NA Rene, just with oodles of power...
Edit- let me just say that an NA Rene may even have more of a "lag" feel with its power really coming strong from 6K up,,,
A little turbo lag is SLIGHTLY annoying but more than made up for by the gobs of torque at your disposal
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Old Apr 21, 2009 | 05:15 PM
  #162  
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Damn you Brettus every time you post, I think its Konig talking...
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Old Apr 21, 2009 | 05:20 PM
  #163  
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We are still doing this???

In the Fall - me and Rotr8 are gonna play trade cars and do some hotlaps.... then we can write a review - hell even video the freakin thing. I bet a few bucks we both come away happy with both cars.

U down Rotr8?
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Old Apr 21, 2009 | 05:27 PM
  #164  
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hell yeah ,, you coming over to the East coast?...
Guess who will be up here also?,,, Moon and he's build his own Highly modified Pettit kit, that fits under the Engine cover,,,
By that time the Street Ray will be up and rolling around too,,, talk about fun, that thing will make both our cars look stupid...
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Old Apr 21, 2009 | 05:29 PM
  #165  
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Hey no fair competing on weight!!!! LOL - Hard to fight a car/thing that wieghs a third of mine.

But yeah - I'm aheadin to FT Useless, VA.
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Old Apr 21, 2009 | 05:30 PM
  #166  
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Originally Posted by Kane
.... then we can write a review ?
which will lead to another SC vs turbo dedate
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Old Apr 21, 2009 | 05:37 PM
  #167  
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By then my car will be an overall great performer,, in two weeks my BBK goes on, as well as my Bodykit and newly refinished Volks, as well as the secondary Rad setup that Moon and Cam developed on my undertray, which will be released to the public in a batch of 10 to gauge interest...
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Old Apr 21, 2009 | 08:35 PM
  #168  
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Keep in mind that there's a difference between turbo lag and boost threshold. If you're at 6,000 RPM's in a turbo RX8 and floor it, thats not lag. Nothing spools up instantly, not even a supercharger. Even a naturally aspirated car "lags". From the time you step onto the gas pedal, to where your throttle body opens, your intake becomes pressurized, etc. A properly sized turbo won't lag.
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Old Apr 21, 2009 | 08:44 PM
  #169  
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Here's a direct link to me downshifting (no throttle at all) then hitting the throttle. It looks like there's about 200-300 rpm before it gives me the max boost set by the boost controller.

http://www.youtube.com/watch?v=pUoA0RuD7Pk#t=1m20s

Keep in mind this was filmed before I had the boost controller settings setup really nicely, so if you watch the entire video, you'll see that I thought I could get max boost about 1,000 rpm earlier.

By the end of tweaking it, I could get 10-12 psi by ~2800 rpm. So if the WG door wasn't fully shut in the video, the 200-300 rpm time before max boost was reached could have been lower because a partially open WG allows air to bypass the turbo and increase spool time.

Either way, 300 rpm to hit 10 psi isn't a big deal. It's insignificant. You'll note boost was increasing during the 300 rpm, so it was already climbing and making more power than stock before that point.
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Old Apr 21, 2009 | 08:57 PM
  #170  
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Originally Posted by mysql



By the end of tweaking it, I could get 10-12 psi by ~2800 rpm. .
that is pretty awesome - i don't think my greddy spools to 10psi until about 3500 .....
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Old Apr 21, 2009 | 09:09 PM
  #171  
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Seeing the poll at the top is pretty nice to see that it essentially a split between the preffered FI....
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Old Apr 21, 2009 | 09:17 PM
  #172  
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/\ lets face it , any FI is better than stock . We are all just one big happy family . Cough !
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Old Apr 21, 2009 | 09:31 PM
  #173  
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Originally Posted by Rotr8
Seeing the poll at the top is pretty nice to see that it essentially a split between the preffered FI....
If you come to a rotary meet in Orlando you'd think it was 2-1 in favor of superchargers



(And there was 1 more that was busy giving test rides that didn't make the picture)
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Old Apr 21, 2009 | 09:39 PM
  #174  
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D-d-d-damn! O.O
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Old Apr 21, 2009 | 09:42 PM
  #175  
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Good god, y'all

Pettit's setup looks great, since it's so consistent.
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