Alignment recommendations in the GT350 supplement

[matthewr87]

Anyone know why the recommended alignment specs in the GT350 supplement differs so much from year to year?

The 2018 specs have the lowest camber numbers. The 2019 front specs are the only one with positive toe. The 2020 specs are back to toe out but with the same camber as 2019.

Very confusing....

2018:

2019:

2020:

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[Postal Bob]

Well first, the 2018's had Super Sports as their OEM tire. Then in 2019 the OEM tires were changed to the SC2's. So that's the obvious reason for the difference from the 2018's. And just guessing here, by 2020, they tweaked the alignment settngs for what worked best for the SC2's.

 

[CharlesC]

Following this. Will go in for an alignment shortly and wondering for my 2019 (maybe use 2020 alignment specs?)

 

[matthewr87]

Yeah I too am going to have to get an alignment shortly. That's why I was looking through these supplements. Odd thing is that the GT350R settings also changed substantially between 2018 and 2019 and AFAIK the tire compound stayed the same there. The R also has slightly different settings for 2020 but I believe they changed the knuckle that year.

 

[svttim]

Good answers on the reasoning's but, still muddy. As far as track, how much camber can you get? Im getting -2.7 to 2.8. And I need more.

 

[K4fxd]

The track settings in the manual are a joke. These pigs need -2.5 camber at a minimum.

 

[mikedahammer]

I ran -2.75 front and -2.0 rear zero toe and still could use more. But I believe that is all I could get with the Steeda camber plates and the strut tower notched.

If you are on the stock setup I would have it maxed out - assuming track only use - but please do not admit that.

 

[matthewr87]

Thanks guys. I'm going to see what is possible with the SPL adjustable front LCAs and tension rods.

 

[K4fxd]

Start at -2.5 and check your tire temps. If you push hard you will end up over -3

 

[The Chairman]

I ran -2.75 front and -2.0 rear zero toe and still could use more. But I believe that is all I could get with the Steeda camber plates and the strut tower notched.

If you are on the stock setup I would have it maxed out - assuming track only use - but please do not admit that.

No need to notch the strut tower. Just use one camber bolt to get near -3* with camber plates.
Many versions out there.

 

[JAJ]

A couple of thoughts on the issue. First, the more aggressive front camber settings came when the GT350 started having adjustable factory camber plates in 2019. Until then, front camber recommendations were limited to what you could squeeze out of the non-adjustable factory setup.

As for how much camber you need, I'm running GT350R springs, bars, dampers and VDM programming on my 2016 GT350 Track Pack with OEM 19x11 aluminum rear rims all around and the settings in the Owner's Supplement work pretty well for me. I've checked at multiple tracks with my Longacre needle type pyrometer and I've got even temps across the tire face. YMMV.

 

[matthewr87]

A couple of thoughts on the issue. First, the more aggressive front camber settings came when the GT350 started having adjustable factory camber plates in 2019. Until then, front camber recommendations were limited to what you could squeeze out of the non-adjustable factory setup.

As for how much camber you need, I'm running GT350R springs, bars, dampers and VDM programming on my 2016 GT350 Track Pack with OEM 19x11 aluminum rear rims all around and the settings in the Owner's Supplement work pretty well for me. I've checked at multiple tracks with my Longacre needle type pyrometer and I've got even temps across the tire face. YMMV.

That's a good point about the camber plates. When you say you are running the settings in the supplement, which ones do you mean (2018? 2019? R or regular?) Thanks.

 

[JAJ]

That's a good point about the camber plates. When you say you are running the settings in the supplement, which ones do you mean (2018? 2019? R or regular?) Thanks.

It's a bit of a hybrid. Front is -2.2 degrees negative camber, zero toe (the average of the 2019 R and the 2020 R front setup). Rear is -1.75 degrees camber, 0.3 degrees toe in. I couldn't quite get -1.60 degrees of camber as called for in the R specs for both years in the back so I settled for the FP350S rear camber setting instead.

 

[SL8888]

I don't understand why the GT 350 R camber adjustments are more than the GT 350 camber adjustments. I thought that the factory aluminum rims that came on the GT 350 have more deflection under cornering loads, and the CF Rims that came on the GT 350 R are a much stiffer rim so deflection under cornering loads is almost non existent, so why does the R spec more camber ?
Educate me please.... Thanks

 

[sukhoi_584th]

Also getting an alignment shortly. For a 2019 GT350 with PSS should I just stick with the 2019 specs even though they're for the Cup 2s? I'm hesitant to go with the 2018 specs as I thought even the base model had some suspension changes for 2019, no?

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