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Series I Aftermarket Performance Modifications Discussion of power adding modifications

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Old Sep 17, 2008 | 08:33 AM
  #1  
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I could make a great desicion tomorrow or a HUGE mistake. I need your opinions ASAP. I currently have a 2004 Mazda RX8 6-spd with 53K. I have always loved the IS300's and there is a 2002 with 37K for sale that is automatic. I remember when these cars first came out I had a set of RICH friends in high school who both had IS300s and with 3 different drivers the auto was faster than the stick. However I was just wondering how are auto's with turbo?
What im trying to get to is, I know the is300 has a lot more potential than the RX8 b/c of the limited amount of power that can be put on the 1.3L rotary BUT the rx8 is really quick and the 6spd is so much fun.
I just wanted some opinions on wether its worth going to an auto IS or staying with what i have? I know this could be bias so I am posting it on my IS300 forum too, I just want HONEST opinions on what you would do?

BTW for a lot of IS300 haters, its black onyx with black leather interior and the DARK carbon fiber tailights NOT the ricer lookin white and red ones.
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Old Sep 17, 2008 | 08:39 AM
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I would keep the rx8, I mean you have a warranty until 100k on the core and the auto is300 isn't near as fun to drive.
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Old Sep 17, 2008 | 08:44 AM
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Here are the pics of the two cars







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Old Sep 17, 2008 | 08:48 AM
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keep the 8.
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Old Sep 17, 2008 | 09:17 AM
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friends don't let friends drive automatic slushboxes.
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Old Sep 17, 2008 | 09:18 AM
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do you know is the e shift auto is closer to the manual than the horrible auto rx8 power difference.... im wanting to say its not that much of a diff in the is300?
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Old Sep 17, 2008 | 09:33 AM
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09Factor's Avatar
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the IS300 looks boring. keep the 8.
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Old Sep 17, 2008 | 09:46 AM
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IS300 is trash keep the 8
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Old Sep 17, 2008 | 09:52 AM
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Any way you can afford both? Both of them great looking but different cars. I personally think it would be fun to have both.
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Old Sep 17, 2008 | 09:54 AM
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Even if an auto IS300 is faster than a stick IS300 as you mentioned doesn't make it any more fun to drive. If I had to get a Lexus it would be an IS but it damn sure wouldn't be an auto. BTW, I used to love those original IS's but the exterior is really starting to look dated.
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Old Sep 17, 2008 | 09:59 AM
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IMO I say keep the 8, that IS just looks abit too old fashioned for me.
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Old Sep 17, 2008 | 01:27 PM
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Originally Posted by lifeisgoodrx8
What im trying to get to is, I know the is300 has a lot more potential than the RX8 b/c of the limited amount of power that can be put on the 1.3L rotary......
So how much power exactly do you think the RX-8 is capped at?

And how much do you think the IS300 is capped at?
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Old Sep 17, 2008 | 01:35 PM
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the highest rx-8 i've seen a dyno for is a mazsport. 380whp.

the highest is300 i've seen a dyno for is 640whp.

slight difference.
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Old Sep 17, 2008 | 03:36 PM
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^ yeah but who cares about horsepower these days anyway?
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Old Sep 17, 2008 | 03:39 PM
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kee ur 8

the IS300 is t3h fail compared to it
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Old Sep 17, 2008 | 03:41 PM
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link to the is300 thread!
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Old Sep 17, 2008 | 03:41 PM
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hey, you could always buy the IS and start a local IS club.

you know, invite all the trophy wives out in their automatic IS's.

discuss the best car seat brands and such.

Last edited by Big Money Pit; Sep 17, 2008 at 03:49 PM.
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Old Sep 17, 2008 | 03:43 PM
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^^^
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Old Sep 17, 2008 | 03:50 PM
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joking aside, if it were a 6 speed i'd be on the fence about it myself.

the IS is a fine automobile.

but never... NEVER for an automatic.
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Old Sep 17, 2008 | 03:55 PM
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My brother has an IS300 5spd. He works with a guy who has a IS300 turbo 5spd. Then he has 2 other friends who had IS300 turbo autos. I met a few of the other IS300 guys. Things to know:
1. It's a better power platform than the Rx-8.
2. It's got excellent trunk space and cabin space if you like driving people around (I don't).
3. It's got that supra-like reliability down (lol).
4. Stock for stock, my rx-8 was as fast as my brother's IS300. They have similar power levels and the IS is heavier. I never flat out raced him from a dig (I don't race anybody) but I never felt him pulling on me if we went out driving.
5. On a track, I'd expect my car now (post ignition) to keep or beat the turbo ISs. They're all well north of 400 hp (a couple over 500) and much faster in a line, but it's not a true sports car platform. I do not like driving my brother's car. It feels too easy. You can release the clutch at idle and just roll down the road. The seats feel shallow.
6. I like numbers.

If I had to buy a car to drive to work and take people to meetings and lunch, I would love an IS300. It's an awesome car. If I wanted something for a solo cruise or track day, I would want my Rx8. The Rx8 has more driving feel to it whereas the IS platform is designed to separate the driving from the road more.
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Old Sep 17, 2008 | 10:46 PM
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this model is old. it sales for 3000K to 5000K in Japan. Why go for old model? i don't understand. Why go one step down?
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Old Sep 18, 2008 | 01:33 AM
  #22  
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Originally Posted by kersh4w
the highest rx-8 i've seen a dyno for is a mazsport. 380whp.

the highest is300 i've seen a dyno for is 640whp.

slight difference.
On a stock motor for the Lexus? Most people end up swapping in the ever popular 2JZ-GTE, which isn't cheap to get or buy parts for.

I've seen higher numbers than that (not too a large amount) on an RX-8 with an unopened Renesis.

I bet you it's cheaper to mod an RX-8, considering you can get 400-rwhp without cracking the motor open and no need to buy cams, internals, valvetrain components, etc.

And, of course, the 8 handles much better.

But to each their own, I still like IS300s. The new IS-F's are hot ****.
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Old Sep 18, 2008 | 02:21 AM
  #23  
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buy a jetta. then ugly it up..

beers
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