too much understeer now!

m4a1mustang · 11-16-2010, 12:25 PM

More negative camber up front should help with the turn-in, but really it's going to be difficult to overcome that amount of tire stagger. Ideally you would maintain the OEM ratio or decrease it.

FWIW, you can fit up to a 275 width tire on a 9" wheel.

You could also leave the OEM sway bar up front and run a stiffer rear bar, but that will mostly help center-off.

s30z · 11-16-2010, 01:05 PM

I think you should change the tire size to one of these combo.

F 255-40-19 R 285-35-19

or

F 275-35-19 R 305-30-19

I prefer the first one since 2nd combo is way too much in my onpinion for the stock setup and power.
Generally speaking, if you over size the tire too much, you might get a nicer look, but you not only eat at your power but it can also tend to numb the feel of the vehicle.

vortrex · 11-16-2010, 01:13 PM

neither of those sizes are good though for the wheel though. a 275 on the front is going to be bulging like crazy and a 285 on the rear is going to be stretched quite a bit. my 295's on the rear are already too small for the wheel.

Quote:

Originally Posted by s30z

I think you should change the tire size to one of these combo.

F 255-40-19 R 285-35-19

or

F 275-35-19 R 305-30-19

I prefer the first one since 2nd combo is way too much in my onpinion for the stock setup and power.
Generally speaking, if you over size the tire too much, you might get a nicer look, but you not only eat at your power but it also can also tend to numb the feel of the vehicle.

vortrex · 11-16-2010, 01:14 PM

Quote:

Originally Posted by m4a1mustang

More negative camber up front should help with the turn-in, but really it's going to be difficult to overcome that amount of tire stagger. Ideally you would maintain the OEM ratio or decrease it.

FWIW, you can fit up to a 275 width tire on a 9" wheel.

You could also leave the OEM sway bar up front and run a stiffer rear bar, but that will mostly help center-off.

question, how do other makers get away with an even bigger stagger? porsche has a huge stagger in the 997 and it obviously handles very well.

m4a1mustang · 11-16-2010, 01:16 PM

Quote:

Originally Posted by vortrex

question, how do other makers get away with an even bigger stagger? porsche has a huge stagger in the 997 and it obviously handles very well.

The Porsche needs that stagger as it has the weight of the engine over the rear wheels.

Over the years the 911s have always been notoriously "loose" cars due to their rear-engine design. Porsche engineers have done a lot to balance the car out with each redesign, and part of that includes quite a large stagger.

ChrisSlicks · 11-16-2010, 01:47 PM

Yeah, the weight distribution of the 911 Carerra is 38% front, 62% rear. The large stagger is designed to induce understeer and stop people from going sideways into the nearest tree. There is a reason they used to call the 911 Turbo the "Widowmaker". For the Z you want a 20mm to 30mm stager at most.

s30z · 11-16-2010, 02:12 PM

Quote:

Originally Posted by ChrisSlicks

Yeah, the weight distribution of the 911 Carerra is 38% front, 62% rear. The large stagger is designed to induce understeer and stop people from going sideways into the nearest tree. There is a reason they used to call the 911 Turbo the "Widowmaker". For the Z you want a 20mm to 30mm stager at most.

11-16-2010, 12:25 PM	#1 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6964	More negative camber up front should help with the turn-in, but really it's going to be difficult to overcome that amount of tire stagger. Ideally you would maintain the OEM ratio or decrease it. FWIW, you can fit up to a 275 width tire on a 9" wheel. You could also leave the OEM sway bar up front and run a stiffer rear bar, but that will mostly help center-off. Z34NA likes this. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

11-16-2010, 01:05 PM	#2 (permalink)
s30z Base Member Join Date: Aug 2010 Location: usa Posts: 21 Drives: 73 240z 10 370z Rep Power: 16	I think you should change the tire size to one of these combo. F 255-40-19 R 285-35-19 or F 275-35-19 R 305-30-19 I prefer the first one since 2nd combo is way too much in my onpinion for the stock setup and power. Generally speaking, if you over size the tire too much, you might get a nicer look, but you not only eat at your power but it can also tend to numb the feel of the vehicle. Last edited by s30z; 11-16-2010 at 01:31 PM.

11-16-2010, 01:47 PM	#6 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 655	Yeah, the weight distribution of the 911 Carerra is 38% front, 62% rear. The large stagger is designed to induce understeer and stop people from going sideways into the nearest tree. There is a reason they used to call the 911 Turbo the "Widowmaker". For the Z you want a 20mm to 30mm stager at most. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

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