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Old 10-01-11, 11:48 PM   #1
RichyIS250
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Default Where can i find a 2008 is250 rwd turbo kit

I've been looking for turbo kits for my lexus is250 and i really cant find anything i need a help finding one. thank you
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Old 10-01-11, 11:53 PM   #2
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I've been looking for turbo kits for my lexus is250 and i really cant find anything i need a help finding one. thank you
I dont know about turbo kits but there a few superchargers from Arma and LMS but they cost around $5K and you will only get around 50 whp if your lucky. I think it has something to do with the compression ratio of the engine but Im not too sure.

Honestly if your looking for more power, the best thing to do is to trade in your 250 for a 350 or an F

Last edited by bob4256; 10-01-11 at 11:53 PM. Reason: spelling error
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Old 10-01-11, 11:53 PM   #3
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^dont really know were you can look but if you do this mod you need to post lots of pics and dyno sheets thanks
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Old 10-02-11, 08:13 AM   #4
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I've been looking for turbo kits for my lexus is250 and i really cant find anything i need a help finding one. thank you
You can't, as they don't exist.

Your engine has a 12:1 compression ratio and very limited options for any sort of tuning.

Plus, it makes no financial sense as an IS350 is only about 4k more and adds 102 hp.... any forced induction kit costs more and adds considerably less power to a 250.

For example there's one guy in Greece (where they don't sell 350s) who adapted the IS350 LMS supercharger kit to his car- he added considerably less than 102 hp and spent considerably more than the difference between a 250 and a 350.


LMS doesn't sell their kit anymore, because even on a 350 it made little sense (about 6k for 40-50 hp).
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Old 10-02-11, 09:02 AM   #5
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http://cgi.ebay.com/ebaymotors/DIY-U...#ht_3560wt_991

J/K!
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Old 10-02-11, 11:27 AM   #6
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I'm pretty sure Toyota ECUs are a nightmare to tune. Plus, you'd have to run meth to make any significant amount of power because of the high stock compression.


You want to do it, you'll have to build your own kit. Not worth it unless you absolutely must have a stick, and even then, you'll spend more money than you think by about 75%.
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Old 10-02-11, 11:52 AM   #7
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Nice J/K. iF HE DO IT FOR REAL, I DON'T KNOW WHAT GONNA HAPPEN TO HIS ENGINE LOL
This SUPER TURBO blown 1 Miata, 1 Civic HACK, 1 MR2. LOL
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Old 10-02-11, 12:02 PM   #8
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I'm gonna repost something i posted a while ago...

How to make IS250 faster:

1. Put car in "D"
2. Drive to Lexus dealership
3. Put car in "P"
4. Trade in Car for IS350/IS-F
5. Put IS350/IS-F in "D"
6. Drive

No seriously though, if your looking for something to turbo and make faster, you bought the wrong car. The ECU is untouchable and dropping a turbo in isn't gonna get you much power and will cost you more than trading up to a 350 for an extra 100+ hp boost.
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Old 10-02-11, 12:26 PM   #9
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1. Rebuild w/lower compression pistons.

2.2JZ conversion.
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Old 10-02-11, 02:31 PM   #10
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Why is everyone worried about boosting on 11.8:1 - 12.0 compression? The direct injection helps out with that, plus with alternate fuels...like pump E85, its totally doable with the right support.
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Old 10-02-11, 09:27 PM   #11
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Why is everyone worried about boosting on 11.8:1 - 12.0 compression? The direct injection helps out with that, plus with alternate fuels...like pump E85, its totally doable with the right support.
It's totally doable, however, you're missing the most important support which is ECU tuning. Toyota unfortunately doesn't allow any sort of alterations when it comes to engine management. There's no PnP ECU or reflash that'll still read the factory sensors such as water temp and ambient temperature for your climate control, just to name a few.

You can argue that a piggy back ECU such as AEM Fuel Ignition controllers and GReddy EManage might work. But without having any access to the stock ECU, even the piggy back systems will be finicky at best.

Terrance
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Old 10-03-11, 04:44 AM   #12
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From a financial aspect, trying to get power from the 2.5l doesn't make any sense. If you're made of money and dead set on doing it, you're still limited by the unhackable ECU that these cars come with. You could go stand alone, but then you would lose all the other features the OEM ECU controls.

If you really want a turbocharged engine in your IS250, I would advocate a 2jz-gte or 4g63 swap (I'm a mitsu guy, sry). Or try to shoehorn a domestic V8 in there (LSx swap anyone?).
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Old 10-03-11, 06:53 AM   #13
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1. Rebuild w/lower compression pistons.
Which don't exist last I knew... one member sent a stock one off to have a custom set made, but last I read hadn't gotten anything back and no response when trying to contact the company.

This ignores the other issues with the solution like lack of tuning, the unknown limitations of the cylinder walls, the limits of the fuel system, and the large $ in labor involved in basically rebuilding the motor.

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Originally Posted by 07Lex350 View Post
2.2JZ conversion.
Which will be hundreds of hours of labor (much of it in wiring) and you'll still have a dash light or two you can't get rid of at the end (and good luck with inspection if your state has em)... at which point, assuming you mean a 2JZ-GTE not GE, you'll be roughly as quick as a stock 350 would've been... granted you'll have much more potential to mod for more power going forward at least.




can you get a running car with either solution? Sure.

Does it make any sense, bang for buck wise, versus just ditching the 250 for an already-much-faster-from-factory IS? Nope.
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Old 10-03-11, 06:56 AM   #14
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Which will be hundreds of hours of labor (much of it in wiring) and you'll still have a dash light or two you can't get rid of at the end (and good luck with inspection if your state has em)... at which point, assuming you mean a 2JZ-GTE not GE, you'll be roughly as quick as a stock 350 would've been... granted you'll have much more potential to mod for more power going forward at least.




can you get a running car with either solution? Sure.

Does it make any sense, bang for buck wise, versus just ditching the 250 for an already-much-faster-from-factory IS? Nope.
I don't know about you, but if I was going to drop in a 2JZ-GTE, it wouldn't be going in with the OEM twins.....
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Old 10-03-11, 07:34 AM   #15
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MAPECU3 will work in open and closed loops for blown applications. It is my next goal but I'm out of funds for now. I have it setup and installed with this in mind so all the right wires and options are connected, I just need boost.........
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