Who Said We Can't Run 305/30/20 PSS
#1
"UPDATED w/Pictures" Who Said We Can't Run 305/30/20 PSS
More to come...Stay Tuned!!!
Thank you for your patience and after countless hours on the alignment rack the pictures the CL community has been waiting for:
Last edited by 16GSF00336; 12-14-16 at 02:59 PM. Reason: Added Pictures
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ModInJapan (01-11-17)
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16GSF00336 (12-19-16)
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16GSF00336 (12-19-16)
#7
Tech Info Resource
iTrader: (2)
Front looks like a 265/30/ZR19. Might understeer a bit more with that.
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#9
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iTrader: (2)
OK. 265/30/ZR20. You still increased the front to rear stagger and added camber in the rear. That doubly adds to push, not subtracts. Since the factory does everything in their power to make the car push, this will not be a mechanical performance modification, it will be a visual performance modification. Don't expect faster laps than a stock GSF on a track weekend, you'll be very disappointed.
Last edited by lobuxracer; 12-15-16 at 08:11 PM.
#11
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Right, but the factory spec promotes understeer along with 10 other things Lexus does to ensure understeer from the showroom floor. Anything adding to this, even in a small amount only exacerbates what the factory did. I've done enough chassis tuning over the years on a number of platforms, and all I can say is, the results of these modifications will make the car more prone to understeer than what the factory did, and they were very conservative in ensuring understeer because Ralph Nader, a man who has never owned a car at all, screwed all of us who prefer mechanical performance way back in the 60's.
My big question is, do we have enough room to fit a 295 in the front? If we do, that will generate a massive increase in mid-corner speed.
My big question is, do we have enough room to fit a 295 in the front? If we do, that will generate a massive increase in mid-corner speed.
Last edited by lobuxracer; 12-15-16 at 08:34 PM.
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16GSF00336 (12-19-16)
#12
Lexus Champion
iTrader: (9)
OK. 265/30/ZR20. You still increased the front to rear stagger and added camber in the rear. That doubly adds to push, not subtracts. Since the factory does everything in their power to make the car push, this will not be a mechanical performance modification, it will be a visual performance modification. Don't expect faster laps than a stock GSF on a track weekend, you'll be very disappointed.
Maybe I'm misunderstanding. But in stock guise (255/30/19 (25.1" OD) & 275/35/19 (26.6" OD) the front to rear stagger is 1.5". 265/30/20 has an OD of 26.3" & 305/30/20 has an OD of 27.2". The new front to rear stagger is .9". Doesn't that mean the OP lessened the stagger? Not sure how having the front OD over 1" larger will affect the handling and electronics though.
Lou
#13
Lexus Champion
iTrader: (9)
And with all this talk about the PSS being so much wider than other tires size for size. I just went out to the garage and tried to match the rear tire shot that the OP took. My rears are Bridgestone S-04 295/30/19. So they should be quite a bit narrower than the PSS 305/30/20 of the OPs. No measurement here, but just visually, I'm not seeing a lot of difference.
Lou
Lou
#14
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Lance
Maybe I'm misunderstanding. But in stock guise (255/30/19 (25.1" OD) & 275/35/19 (26.6" OD) the front to rear stagger is 1.5". 265/30/20 has an OD of 26.3" & 305/30/20 has an OD of 27.2". The new front to rear stagger is .9". Doesn't that mean the OP lessened the stagger? Not sure how having the front OD over 1" larger will affect the handling and electronics though.
Lou
Maybe I'm misunderstanding. But in stock guise (255/30/19 (25.1" OD) & 275/35/19 (26.6" OD) the front to rear stagger is 1.5". 265/30/20 has an OD of 26.3" & 305/30/20 has an OD of 27.2". The new front to rear stagger is .9". Doesn't that mean the OP lessened the stagger? Not sure how having the front OD over 1" larger will affect the handling and electronics though.
Lou
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16GSF00336 (12-19-16)