Help [me choose performance mods]

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06-27-16, 03:45 PM

#16

Icy350

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Quote:

Originally Posted by redspencer

It's okay. a set of Penske coilovers that have been properly dialed-in would be a good alternative.

But that is not budget friendly

but yes Penske is known for their coils. That would be a great alternative.

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06-27-16, 07:09 PM

#17

blkout250

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Quote:

Originally Posted by blkout250

Kool thanks

I wanna get an exhuast that is not loud like the greddy exhaust

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06-27-16, 08:05 PM

#18

MWIS350

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Test drive and Trade it in for IS350 or IS-F that's an easy 100-200 hp gain.

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06-27-16, 08:06 PM

#19

MWIS350

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We used to have IS250 and IS34050. I did nothing to it beside rims, but did everything to my IS350. After a year we trade IS250 for ES350.

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06-28-16, 12:38 AM

#20

Parsa

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Quote:

Originally Posted by redspencer

IMHO, rather than spending the money for straight-line performance gains (which would be minimal), I would take advantage of the lighter curb weight and look into handling mods instead.

An IS250 equipped with the F-Sport suspension accessories package (shocks/springs/sway bars/chassis brace) will handle nearly identical to the 2011 IS-F (which itself was an improvement over the 2008 IS-F via a revised suspension and Torsen LSD). Below, you can see an Edmunds video review of a 2008 IS250 equipped with the F-Sport Accessories package and its slalom and skidpad results are near identical to the 2011 IS-F which was also tested by Edmunds:

2008 Lexus IS 250 F-Sport | Track Tested | Edmunds.com - YouTube

2011 IS-F Review and Stats- http://www.edmunds.com/car-reviews/t...exus-is-f.html

IS250 w/ F-Sport Accessories Package-
Skidpad = 0.89
Slalom = 71.0 mph

2011 IS-F w/ Revised Suspension and LSD-
Skidpad = 0.90
Slalom = 69.7 mph

how can an is250 with some upgraded suspension parts even have comparable handling to an isf when it has an open differential?

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06-28-16, 08:15 AM

#21

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Quote:

Originally Posted by Icy350

I hope you realize you just shat on the best handling IS in the USA LOL. Take the suspension advice from Redspencer, he knows what he is talking about.

Budget friendly coils nowadays are all for looks, not for function.

I wasnt ****ting on it I was just saying for what he is looking for he may benefit more from coilovers lol.

Maybe read my comment better next time bud. I agreed with what Redspencer said.

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06-28-16, 08:35 AM

#22

redspencer

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Quote:

Originally Posted by Parsa

how can an is250 with some upgraded suspension parts even have comparable handling to an isf when it has an open differential?

Weight distribution can be a contributing factor (54:46 for the IS-F vs 52:48 for the IS250) as well as a 300 pound difference between the two models. Both models also share the same 225 front and 255 rear tire widths (which is too narrow for the IS-F, even with a Torsen diff).

The figures I provided from Edmunds was an attempt to use the data from the same source but the results can vary due to weather conditions, temperatures, time of the year, etc. I have seen the 11+ IS-F pull better numbers from other publications but then it becomes an apples-to-oranges comparison, IMO.

There are other subjective factors not included in the handling comparison which is steering feel and feedback (which the IS-F has and the IS250 lacks). A proper remedy to alleviate this issue is upgrading the Steering ECU to the one from the IS-F (preferably from the 11-12 or 13-14 IS-F Steering ECU).