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RX-8 Discussion General discussion about the RX-8 that doesn't fit in one of the specialty forums.
View Poll Results: Which one would you get for your 8?
TurboCharger
55.07%
SuperCharger
52.17%
Multiple Choice Poll. Voters: 138. You may not vote on this poll

Turbocharged or SuperCharged?

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Old 04-15-2009, 01:32 PM
  #26  
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I say turbo, just because that's all I've used in any other car. Don't get me wrong, I wouldn't complain if I saw a SC on my 8.
Old 04-15-2009, 01:35 PM
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Gotta look at what the OEMs are using these days - 95% turbo, 5% SC.....

Even the new Mini has dropped the blower and gone turbo.
Old 04-15-2009, 01:36 PM
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plus if you go turbo you can keep your warranty since the MS8 uses turbo.
Old 04-15-2009, 01:39 PM
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A: Whichever one puts a bigger grin on your face. Seriously, it's your car, make your decision. Hopefully with research and thought, but still, your opinion, your car.

Personally, while turbo has higher highs, I would do S/C because it would preserve more of the N/A curve and response, and still provides more power than is really useful, while being more reliable and simpler to install/maintain/tune. And sounds like a spooling jet engine.

Something else to think about is the turn-over rate of people that go turbo, then go back and get rid of the turbo. Compare briefly to the number of people that have gone back to NA from a supercharger.

It says something.
Old 04-15-2009, 01:49 PM
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Turbos operated with wasted energy, superchargers are pure parasitic. Anytime you can capture otherwise wasted energy your ahead of the game.

Turbo all the way!
Old 04-15-2009, 01:57 PM
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I completely agree. Just gotta watch out for when that captured energy doesn't want to be caught, and decides to pop your engine and put you behind the game
Old 04-15-2009, 02:49 PM
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Originally Posted by Jedi54
jedi, i think this is the BEST post you have ever made...

it made my day
Old 04-15-2009, 02:54 PM
  #33  
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Old 04-15-2009, 04:09 PM
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I used to think that too, until I educated myself on the subject (thanks in no small part to some of the more learned here on the topic).

It's all compromise at some point. I just prefer s/c as more innately reliable.

Nice graph Jedi.

Originally Posted by Raptor75
Turbos operated with wasted energy, superchargers are pure parasitic. Anytime you can capture otherwise wasted energy your ahead of the game.

Turbo all the way!
Old 04-15-2009, 04:30 PM
  #35  
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Wastegate!

Originally Posted by RIWWP
I completely agree. Just gotta watch out for when that captured energy doesn't want to be caught, and decides to pop your engine and put you behind the game
Old 04-15-2009, 04:47 PM
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I also use to think this way and my continuing education on the matter just reaffirms my initial conclusion. Turbos are the superior FI system!

Both have plus and minuses but in the end you are recapturing wasted energy with a turbo which translates into more power from each gallon of gas. This is why most manufactures are using turbos to one extent or another in their line ups while SC remain a obscure option for all intensive purposes.

Originally Posted by Huey52
I used to think that too, until I educated myself on the subject (thanks in no small part to some of the more learned here on the topic).

It's all compromise at some point. I just prefer s/c as more innately reliable.

Nice graph Jedi.
Old 04-15-2009, 04:57 PM
  #37  
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10 sequential turbos for mega boost across all rpms!!!!!

S/C will add a little bit more down low, whereas you get the most gains from the turbo higher up.. depending on how you size the turbo
Old 04-15-2009, 05:39 PM
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Originally Posted by Jedi54
OMG guys, I figured it out!!!!

RX8 Turbo vs Supercharger <--- click!
Sadly, the first hit comes right back to this page.
Old 04-15-2009, 06:15 PM
  #39  
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Everyone's WRONG. You just need one of these:

http://www.myhotmustang.com/TurboTip...nd-Tip/533190/
Old 04-15-2009, 06:26 PM
  #40  
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BreastCharged.
Old 04-15-2009, 06:40 PM
  #41  
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**** and beer charging FTW
Old 04-15-2009, 07:01 PM
  #42  
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lols on the 2jz

but its preference with lots of other threads on this.

reasons i would sc:minority, persuasive pettit theory on turbo failures, new hymee sc.

reasons i would tc: bov, you FEEL the power.
Old 04-16-2009, 06:23 AM
  #43  
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Listening to Pettit talking about turbo failure theory is like listening to Osama Bin Laden talking about USA. It's not going to be objective.
Old 04-16-2009, 06:40 AM
  #44  
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Originally Posted by neXib
Listening to Pettit talking about turbo failure theory is like listening to Osama Bin Laden talking about USA. It's not going to be objective.
Not really, they've probably turboed more Renesis engines than they've installed their supercharger. Their paper is very objective, see my sig and read it and see for yourself.
Old 04-16-2009, 07:41 AM
  #45  
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Capturing that wasted energy also restricts the exhaust, so ..... as always, compromise.

The real reason that there are substantially more turbo's than superchargers in the sportscar world is that they are more bang for the manufacturers buck - easier to cheaply manufacture, easier to locate (most anywhere in the exhaust stream). etc, etc.

Originally Posted by Raptor75
I also use to think this way and my continuing education on the matter just reaffirms my initial conclusion. Turbos are the superior FI system!

Both have plus and minuses but in the end you are recapturing wasted energy with a turbo which translates into more power from each gallon of gas. This is why most manufactures are using turbos to one extent or another in their line ups while SC remain a obscure option for all intensive purposes.
Old 04-16-2009, 08:09 AM
  #46  
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The reason everyone is killing your thread is because there are at least 985,679,411.7 other posts asking the same question. Research first. Write down exactly what you want from an FI kit, and find the closest one that matches your needs. Be reasonable though, you are only dealing with 1.3L. Don't settle. If your dream kit costs $9K just for parts, don't settle for the $5K kit thats not as good but more within reach. You do NOT want to save money on forced induction, you want to SPEND money. You're going to spend a lot of money on FI. Either at first or later. If you cheap out and get some POS kit, ask anyone on this site, you're going to pay later. Do it right the first time. If you can't pay, don't play.

There are tradeoffs with each type of kit. A turbocharger will be a more quiet ride and flows much more torque. I have yet to meet someone with a supercharged RX8 that wasn't happy with their ride though, especially since a supercharged RX8 is basically no different than a naturally aspirated RX8 as far as maintenance goes. Ending advice is RESEARCH. If you're serious into FI then do your homework. Worst thing that could happen is that you actually learn something. BTW if a turbo and supercharger kit are both set up correctly, there's nothing that could go wrong on a turbocharger that can't happen to a supercharger. You can run lean and detonate on either kit, so arguing which is more reliable in theory is pointless. This is my first and last post in this thread. Have a nice day.

Last edited by Red Rex; 04-16-2009 at 08:16 AM.
Old 04-16-2009, 08:27 AM
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Arguing which is more reliable, in practice, is not pointless. Also my last post in this thread, and have a nice day.
Old 04-16-2009, 08:57 AM
  #48  
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Originally Posted by RIWWP
I completely agree. Just gotta watch out for when that captured energy doesn't want to be caught, and decides to pop your engine and put you behind the game
You have to watch out for that regardless of the form of FI. Superchargers are not "intrinsically more reliable" than turbochargers. Either option is cramming more air into your engine, if you screw up in the cramming portion or don't introduce enough fuel for what you are shoveling in, *BANG* goes the motor.

Both options have benefits and disadvantages. If you prefer the OEM like power curve that stays linear a SC is the best bet. If you want a brief spool that kicks you in the back, go with a turbo. Arguing that more cars are turbocharged than SC because its cheaper for the manufacturer is asinine, there are a hell of a lot more aftermarket turbos than factory. Its just as silly to say that SC are somehow a fringe technology and nobody uses them, as tons of cars use superchargers. More muscle cars use superchargers than turbos because the power curve is so linear and they generate so much low end torque.

They are both viable in general, they are both viable for the RX-8, and it boils down to personal preference, price, and what you want your car to drive like. I love both SC and turbo, but I personally find a turbo more fun to drive. Besides, blow off valves sound amazing, and really you are picking between the sound you like more: vvvvVVVRREEEEEEEEEEEeerrrrr (SC) or vvvrrrrRRR PssssHHHHHH
Old 04-16-2009, 08:58 AM
  #49  
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AH thanks guys for bringin a smile to my face when i woke up
Old 04-16-2009, 09:35 AM
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Agreed, the turbo will cause some restriction but the overall equation is a big plus from normally wasted energy. SC do not recapture any wasted energy, they are parasitic to the main power. With SC the net result is more power but at a lower efficiency then a turbo.

I also agree with your second comment which pretty much reaffirms my initial statement that Turboing is a superior solution. I understand when a SC makes sense and why some people would select it but over all Turboing is a less expensive, more efficient solution. I would even go as far as to say just as reliable when set up properly ie STi or EVO.

On a side note, if you have seen these arguments before then leave! No one has a gun to your head to read this thread and although other treads like this exist this one allows people like myself who had not participated in the earlier threads to discuss what we think. I may not agree with Huey52 opinion but I am interested in why he made it and debating it with him. So if this bores you...move along, we are really less interested in hearing from you then you are from us.


Originally Posted by Huey52
Capturing that wasted energy also restricts the exhaust, so ..... as always, compromise.

The real reason that there are substantially more turbo's than superchargers in the sportscar world is that they are more bang for the manufacturers buck - easier to cheaply manufacture, easier to locate (most anywhere in the exhaust stream). etc, etc.


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