IS-F suspension on IS350?
#3
Should be a direct swap..but since the is-f weighs more than the 350, the spring rates and damper rates might be too stiff for the 350..would be interesting to see the results in ride height and ride quality..i say try it out..
#4
2011 Curb Weights:
IS250 M/T:
F: 1804lbs
R: 1651lbs
T: 3455lbs
IS250 RWD A/T
F: 1775lbs
R: 1660lbs
T: 3435lbs
IS250 AWD:
F: 1982lbs
R: 1669lbs
T: 3651lbs
IS350 RWD:
F: 1849lbs
R: 1678lbs
T: 3527lbs
IS350 AWD:
F: 2011lbs
R: 1693lbs
T: 3704lbs
IS F:
F: 2045lbs
R: 1735lbs
T: 3780lbs
Based on the above, I'd say you'd be better off finding the factory Sport Suspension for the IS250/350 than going with the IS F suspension, but it's hard to know exactly how it would handle. I had also planned on going for the factory IS F suspension, but now I'm thinking that the IS250 Sport Suspension might be the way to go instead.
Jeff
IS250 M/T:
F: 1804lbs
R: 1651lbs
T: 3455lbs
IS250 RWD A/T
F: 1775lbs
R: 1660lbs
T: 3435lbs
IS250 AWD:
F: 1982lbs
R: 1669lbs
T: 3651lbs
IS350 RWD:
F: 1849lbs
R: 1678lbs
T: 3527lbs
IS350 AWD:
F: 2011lbs
R: 1693lbs
T: 3704lbs
IS F:
F: 2045lbs
R: 1735lbs
T: 3780lbs
Based on the above, I'd say you'd be better off finding the factory Sport Suspension for the IS250/350 than going with the IS F suspension, but it's hard to know exactly how it would handle. I had also planned on going for the factory IS F suspension, but now I'm thinking that the IS250 Sport Suspension might be the way to go instead.
Jeff
#6
Tech Info Resource
iTrader: (2)
The geometry on the F is different as well as the springs and shocks, so you're not going to get what you expect.
As softly sprung as the 2IS are from the factory, I'd really doubt it would be bad. The F needs more front spring for track work - it definitely likes to lift the inside rear wheel in fast on-camber turns, so it may not be all bad if you want better track manners.
You might be very unhappy with the street performance though.
As softly sprung as the 2IS are from the factory, I'd really doubt it would be bad. The F needs more front spring for track work - it definitely likes to lift the inside rear wheel in fast on-camber turns, so it may not be all bad if you want better track manners.
You might be very unhappy with the street performance though.
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#8
The geometry on the F is different as well as the springs and shocks, so you're not going to get what you expect.
As softly sprung as the 2IS are from the factory, I'd really doubt it would be bad. The F needs more front spring for track work - it definitely likes to lift the inside rear wheel in fast on-camber turns, so it may not be all bad if you want better track manners.
You might be very unhappy with the street performance though.
As softly sprung as the 2IS are from the factory, I'd really doubt it would be bad. The F needs more front spring for track work - it definitely likes to lift the inside rear wheel in fast on-camber turns, so it may not be all bad if you want better track manners.
You might be very unhappy with the street performance though.
#9
The geometry on the F is different as well as the springs and shocks, so you're not going to get what you expect.
As softly sprung as the 2IS are from the factory, I'd really doubt it would be bad. The F needs more front spring for track work - it definitely likes to lift the inside rear wheel in fast on-camber turns, so it may not be all bad if you want better track manners.
You might be very unhappy with the street performance though.
As softly sprung as the 2IS are from the factory, I'd really doubt it would be bad. The F needs more front spring for track work - it definitely likes to lift the inside rear wheel in fast on-camber turns, so it may not be all bad if you want better track manners.
You might be very unhappy with the street performance though.
Jeff
#11
The IS F springs/shocks will probably fit fine, but they're designed for a different weight vehicle with different suspension geometry. It won't handle just like an IS F, it will be slightly different.
Probably not bad, but not identical to the IS F. You could always order the arms that are different if you really wanted to.
Jeff
Probably not bad, but not identical to the IS F. You could always order the arms that are different if you really wanted to.
Jeff
#12
Tech Info Resource
iTrader: (2)
So, you've looked up all the part numbers and they're the same on the F and F Sport models for 2011?
#13
That is correct. I checked all the control arms (front and rear), and the rear subframe (front subframe is obviously different to accommodate the 2UR-GSE).
You are correct about the track differences between the ISx50 and the IS F. Obviously the wheel/tire specifications will also make an appreciable difference as well.
Jeff
You are correct about the track differences between the ISx50 and the IS F. Obviously the wheel/tire specifications will also make an appreciable difference as well.
Jeff
#14
Tech Info Resource
iTrader: (2)
Sweet! Which pieces are they? The two that measure out differently in the service manual? I think I can afford two links a lot easier than waiting for a wrecked 2011 F and getting the whole rear subframe...but I would get the LSD with that too...still...