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Old 10-24-2019, 03:44 AM   #2451
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^^^^
This is another good point.

Driving style and desired characteristics are another thing you need to look at and work out.

Understeer/oversteer/turn in/stability, are all effected and can be dialed in or out.

Just because a setting works well and feels good or fun for one driver doesn't mean that another driver likes it.

Have you started playing with your dampening settings yet?

A acceptable set up for your driving style starts at the road surface all the way to the nut at the end of the steering wheel.
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Old 11-02-2019, 09:54 AM   #2452
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Originally Posted by Jdmuscle View Post
Thanks ... Ended up getting the adjustable LCA and the toe arms. Might as well just do the alignment once and be done.

What alignment specs do y’all recommend? Mainly for street use.
i spent a lot of time writing the first post, for no one to read it

there is detailed alignment details there.

for street driving you really don't want more than -2 camber all around. the rear you don't want anything more than 2 as its double wishbone and will compress/add camber as suspension loads up. for track, you want a bit more than -2 up front though.


on street in first post i ran -2.2 in front and -1.8 in rear with toe in rear and slight toe out front.

you do not want to have zero toe. you want the rear to be slightly toed in for better stability. you can toe out the front if you would like better turn initial turn in.

As far as LCA's there aren't necessary, but once you lower the rear, it begins to camber in. theres no way to adjust it factory so you may have uneven camber and too much of it. just get SPC control arms, they are not expensive and they work great. give you +/- 2 degrees of adjustability which is all you need to get in spec.

and i saw discussion regarding running a 285 on a 9.5...actual grip will not be gained simply by going to a bigger size (once you're already at a 9 inch plus wide tire)
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Old 11-16-2019, 11:54 AM   #2453
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Alright guys. I have full coilovers, and camber bolts and camber plates for the front.
Just picked up Avid AV20 18x9.5 +38 wheels and 275/40/18 Michelins. Who wants to place bets if I can or can't fit these!?
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Old 11-16-2019, 12:13 PM   #2454
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I love this thread.. but only if the postings contain photos of the 'meaty' tyres..
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Old 11-16-2019, 09:20 PM   #2455
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Alright guys. I have full coilovers, and camber bolts and camber plates for the front.
Just picked up Avid AV20 18x9.5 +38 wheels and 275/40/18 Michelins. Who wants to place bets if I can or can't fit these!?
Really, 40 series 275 width 18s?

24.6" is OEM diameter.

A 275/40/18 is 26.7" diameter.

275/35/18s are huge at 25.6" diameter!

I'm not saying that you can't, but IMO, you shouldn't.

Good luck.
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Old 11-20-2019, 06:26 PM   #2456
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Originally Posted by Leonardo View Post
Really, 40 series 275 width 18s?

24.6" is OEM diameter.

A 275/40/18 is 26.7" diameter.

275/35/18s are huge at 25.6" diameter!

I'm not saying that you can't, but IMO, you shouldn't.

Good luck.
Whats the big deal with the difference in diameter? I downgraded to 245/40/18 in the front, but you know those low profile tires are more expensive that's why I got 40 series
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Old 11-20-2019, 07:45 PM   #2457
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Whats the big deal with the difference in diameter? I downgraded to 245/40/18 in the front, but you know those low profile tires are more expensive that's why I got 40 series
A 245/40/18 is 4.5% larger than the OEM diameter. A difference of +/- 3% or less is what is generally accepted as a good idea. I know there are alot of guys running 245/40/18s. I think it's alright, but would not go larger.

The diameter difference will change the accuracy of the speedometer and the odometer, can cause rubbing, and IMO adds unnecessary weight.

The largest diameter tire I would suggest is a 265/35/18. It is 2.8% larger than OEM. If you need a wider tire, a 285/30/18 is actually only 0.4% larger diameter than stock, 24.7" vs 24.6", and fits on the car easier than a 275/35/18.

A 275/40/18 is 8.5% larger in diameter than OEM and is 1.1" taller than your 245/40/18s!

I would sell the 275/40 tires and get smaller diameter ones.

Also, the profile of a tire changes with its size. A 215/45/17 and a 275/35/18 both have the same exact tire profile height of 3.8".



https://tiresize.com/calculator/
Play around with this tool. It helps see what tires will fit best.


Cheers!
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Old 11-20-2019, 08:01 PM   #2458
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Originally Posted by Leonardo View Post
A 245/40/18 is 4.5% larger than the OEM diameter. A difference of +/- 3% or less is what is generally accepted as a good idea. I know there are alot of guys running 245/40/18s. I think it's alright, but would not go larger.

The diameter difference will change the accuracy of the speedometer and the odometer, can cause rubbing, and IMO adds unnecessary weight.

The largest diameter tire I would suggest is a 265/35/18. It is 2.8% larger than OEM. If you need a wider tire, a 285/30/18 is actually only 0.4% larger diameter than stock, 24.7" vs 24.6", and fits on the car easier than a 275/35/18.

A 275/40/18 is 8.5% larger in diameter than OEM and is 1.1" taller than your 245/40/18s!

I would sell the 275/40 tires and get smaller diameter ones.

Also, the profile of a tire changes with its size. A 215/45/17 and a 275/35/18 both have the same exact tire profile height of 3.8".



https://tiresize.com/calculator/
Play around with this tool. It helps see what tires will fit best.


Cheers!
You're not wrong, but I was doing it more for budget oriented reasons and a will it work type of deal. Of course if I was buying all these tires new, sure I would get the lovely correct size yaknow, but I buy all my tires used so I try to get good deals and performance on a budget. I get the weight thing but I'm not too worried about that. I read somewhere with TPMS sensors speedo corrects on its own, or no? And yeah I get its a bigger tire and all but I just wanna play around and see if I can make it fit right. I was playing around on wheel-it-fit and with -1.7 camber from the 30-40 range they seem to all have the same clearance to the fender. Don't think I'm arguing and saying you're wrong, I'm just coming in from a different perspective of Cost for Performance and a can it be done type of thing. I do appreciate all the knowledge you're laying out
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Old 11-22-2019, 01:56 PM   #2459
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You're not wrong, but I was doing it more for budget oriented reasons and a will it work type of deal. Of course if I was buying all these tires new, sure I would get the lovely correct size yaknow, but I buy all my tires used so I try to get good deals and performance on a budget. I get the weight thing but I'm not too worried about that. I read somewhere with TPMS sensors speedo corrects on its own, or no? And yeah I get its a bigger tire and all but I just wanna play around and see if I can make it fit right. I was playing around on wheel-it-fit and with -1.7 camber from the 30-40 range they seem to all have the same clearance to the fender. Don't think I'm arguing and saying you're wrong, I'm just coming in from a different perspective of Cost for Performance and a can it be done type of thing. I do appreciate all the knowledge you're laying out
The only guys running tires close to the diameter of a 275/40/18 are rally guys. It looks like to me that you will need a 1" to 2" lift. Your front WILL rub when turning. your rears will rub on the bumper tab.

https://www.ft86club.com/forums/showthread.php?t=105692
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Old 11-22-2019, 02:06 PM   #2460
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The only guys running tires close to the diameter of a 275/40/18 are rally guys. It looks like to me that you will need a 1" to 2" lift. Your front WILL rub when turning. your rears will rub on the bumper tab.

https://www.ft86club.com/forums/showthread.php?t=105692
So you think 275/35/18 will fit with camber and lowered but with the 40 series it'll need a lift?
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Old 11-22-2019, 02:33 PM   #2461
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So you think 275/35/18 will fit with camber and lowered but with the 40 series it'll need a lift?
Yes.
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Old 11-22-2019, 02:36 PM   #2462
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Yes.


Such a little change but big at the same time. I now feel like an idiot. Will 245/35 up front fit with no rub


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Old 11-23-2019, 08:01 AM   #2463
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Such a little change but big at the same time. I now feel like an idiot. Will 245/35 up front fit with no rub


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245/35/18 is a great size. You won't have any issues with them in the front.

I'm currently running 245/35/18 square.
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Old 11-23-2019, 11:32 AM   #2464
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245/35/18 is a great size. You won't have any issues with them in the front.



I'm currently running 245/35/18 square.


Sweet. Car should be done Wednesday then so expect some pics


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