How does the E-LSD work with plus sized wheels ?
Thread Starter
Racer
Joined: Nov 2017
Posts: 318
Likes: 46
From: Scottdale, Arizona
How does the E-LSD work with plus sized wheels ?
Hi,does the e-lsd/traction control/abs have any hiccups when plus sizing front and rear wheels ? assuming the front to rear is kept within the same ratio as stock- will the traction control and e-lsd work exactly the same? i would put a 355/30/19 in the rear (viber acr tire) - but its quite a bit taller than the stock cup tire.
Last edited by howdigethere; Nov 13, 2017 at 09:55 AM.
Thread Starter
Racer
Joined: Nov 2017
Posts: 318
Likes: 46
From: Scottdale, Arizona
it has to make difference with how the traction control/abs/ even the e-lsd system works. changing the rolling diameter might confuse the computers.
not sure why chevy did such an odd thing by putting a 25 series tire in the back... it looks terrible, and i cant see how a 25 series runflat sidewall would perform better than a proper 355/30/19 tire (viper ACR tire).
not sure why chevy did such an odd thing by putting a 25 series tire in the back... it looks terrible, and i cant see how a 25 series runflat sidewall would perform better than a proper 355/30/19 tire (viper ACR tire).
Last edited by howdigethere; Nov 13, 2017 at 04:56 PM.
Racer
Joined: Sep 2016
Posts: 304
Likes: 67
From: Bay Area CA
I went 20/21, 295 & 355. Car has a mind of its own.. the handling has gone to ****.. I've posted multiple times here about if a recal is needed for the mag ride control or the e-lsd, and have not had a single intelligent answer.. So far I'm suspecting the Mag Ride to be the main culprit as the car tail wags really scary bad under hard throttle as if the MRC cant figure out what to do under that condition. I've been too lazy to switch back to the OEM set up to see it that resolves it, but the car had no issues prior to new tire/wheel install, and Ive also aligned it twice to rule out alignment..
On the upside, my car looks bad ***!!
On the upside, my car looks bad ***!!
Last edited by gymdoc; Nov 14, 2017 at 01:07 AM.
Le Mans Master
Joined: Aug 2000
Posts: 6,486
Likes: 1,659
From: Las Vegas NV
Keep the same ratio of front/rear overall tire overall diameter, and everything should stay happy. The car neither knows nor does it care what rim size or aspect ratio tire is mounted. All it “sees” are 4 rotational speeds as reported by the four Wheel Speed Sensors.
The car’s ABS, Active Handling look at difference in rotational speed between the 4 tires, not ground speed. The Car also knows that as designed, the rear tires are about 1” taller than the fronts, so the rears will always show that much slower rotational speed than the fronts, even on a flat dry road with no wheel slippage occurring, so it builds that difference into its calculations.
Rule of thumb here is to keep the rear tire/wheel OA diameter between 1” to 1.25” taller than the fronts. This seems to work well with near-stock sizings. More difference would be needed if you are going much taller, but I would think you’d have physical clearance issues before that.
The car’s ABS, Active Handling look at difference in rotational speed between the 4 tires, not ground speed. The Car also knows that as designed, the rear tires are about 1” taller than the fronts, so the rears will always show that much slower rotational speed than the fronts, even on a flat dry road with no wheel slippage occurring, so it builds that difference into its calculations.
Rule of thumb here is to keep the rear tire/wheel OA diameter between 1” to 1.25” taller than the fronts. This seems to work well with near-stock sizings. More difference would be needed if you are going much taller, but I would think you’d have physical clearance issues before that.
Last edited by Kent1999; Nov 14, 2017 at 12:29 PM.
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Thread Starter
Racer
Joined: Nov 2017
Posts: 318
Likes: 46
From: Scottdale, Arizona
355/30/19 is about 1" taller than stock 20" set up....
so if i plus size the front to make the rear exactly 1" taller than the front- all will be 100% fine ?
so if i plus size the front to make the rear exactly 1" taller than the front- all will be 100% fine ?
Last edited by howdigethere; Nov 14, 2017 at 02:45 PM.