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GTP

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It's going to depend on what you have done to your car, but an S550 is an S550.

Camber: -2.5* front / -2.0* rear
Toe: 0.25mm in per side front / 2mm in per side rear on an 18" rim (don't make me calculate degrees)
Equal caster numbers if you can change it, but have the 'light' side at maximum.
Here you go @TeeLew :
https://robrobinette.com/ConvertToeInchesToDegrees.htm

I do a good string alignment, and then I switch over to toe plates for changing/checking toe.
I came up with a conversion factor of 2.66 for my toe plates. IOW, Degrees = 2.66 X Inches
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GTP

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It's going to depend on what you have done to your car, but an S550 is an S550.
...
On a track, if they're on the same basic tire, they will all run well with the same basic alignment even with slightly different spring/bar packages. It doesn't particularly matter if you're on the all-singing and dancing GT500 or the base of the base Eco's. They're all the same chassis. and the uprights aren't enough of a difference to change anything.
...
Bushing deflections will also have an influence on what you end up running. If you're on bearings, your toe will be different than if you're on stock bushings. It's hard to know how much.
An S550 is pretty much an S550. Yours has more power. That doesn't change basics of the alignment. I specified the tires. Different tires will need fine tuning, but these numbers will be a good start.
...
I tend to agree. The 550's are all about the same weight, weight distribution, wheelbase/track, etc. I think tire choice and alignment really make more of a difference (taking out driver skill).

For the intermediate that the driver claims to be, the best thing to do is go to his manuals supplement and start with the basic settings and adjust them from there. I don't track a mustang GT. I wouldn't begin to try to tell someone what the settings should be unless I was using the same car, same tires, and same track. Again, it all changes based upon the track.
...
Last weekend I went to a new-to-me track. Saturday morning was 3 sessions that were wet, damp, and then dry. I learned the track on my 275 square summer tires.

For the afternoon, I swapped to 305 square Cup2s, and changed front camber and toe accordingly.

By Sunday, I got a point-by from a GT350 that couldn't shake me, and I gradually pulled away from a GT500 in the turns, enough such that he could only catch me by the end of the straight. We were all on same or similar tires, but the '500 had still not made use of his front camber plates.

My GT has GT350 brakes and same or equivalent suspension and 10 added spherical bearings. So I think the biggest difference among the 3 cars was power, alignments and drivers.
 

Tomster

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You *have* to stagger the cold pressures at Daytona if you want them to be even when they're hot, because the right hand side will have a greater pressure rise than the left. I recommended 35 hot all around.

And your retort?
In all the years I have been running there, I find that information false. Early on a long time ago, I was fortunate enough to speak with a michelin tire engineer who was part of the cup 2 testing at Daytona. He gave me some very good advice.

First of all, the pressures on all 4 tires rise at pretty much the same rate. The average rise winds up to be about 8 psi. Again, symetrical. The pressures I run (cold) are 28 left, 29 right front, and 30 right rear. The reason for this (again) is because of the asymetric loads placed on the tires in the outside portion of the banked roval. I didn't come up with this stuff on my own, this was information from the team that developed the cup 2 at Daytona. That care and feeding guide I attached to a previous post was supplied by him. Although that brochure was for the original cup tire, he said that was very much applicable.

I don't know what you do for a living, but at this point, if you are some kind of tire engineer, that would be good information. I got my information from the source and it has proven well over many years of running at Daytona. I monitor my pressures in real time. Time and time again, the pressures rise and fall predictably as observed over many sessions and many many years of running at this specific track.

I live here. I track here. I know this track very well. Care to tell us about you and your specific background and what makes you an expert of this track? Again, my early knowledge of this tire at this track came directly from the engineers at michelin, and has been reinforced over many years of observation driving this track.

Now, as for you. The posts you participate all seem to have a consistent theme, and that is you being an ass.

Congrats on the condescending post of the day.
You may want to read your posts again and see how condescending you come across. Other theads with you in it, same thing. People like you don't last very long around here.

Cupcake, I could make you look very, very silly right now. Stop it.
So far, based on the incorrect advice you've been giving so far, I think its the opposite.

but an S550 is an S550
Yes, there are different factory settings for a stock alignment
Which one is it? You don't seem to get it that the GT350s and GT500s have different track alignment settings for the track. Each is different than the other and the version of each has separate settings. Completely different from the street settings. They are very good starting points for anyone to use and then tweak based upon how the car and the tire performs.

JFC, the pearls before swine thing gets fucking old.
Class dude.

And, yes, I am being an ass because you are being an ass, and I'm a lot better at it, Jack.
Everything was fine until you showed up, Jack. Now tell us what makes you a Daytona expert?

Regardless, a factory alignment is in no way optimized for a racetrack, whether or not your little advertorial said so.
Newsflash, the engineers and professional racecar drivers at FP, during the cars development, came up with track alignment settings for each version of the car. Who said anything about factory alignment? I think part of the problem is that you don't read very well. You jumped into this post claiming I was "condescending". Then you somehow come up with using a factory alignment on a track? You might want to start over and re-read how you came up with the crap you did.

And, no, not a particularly bad day, I just get sick of the Shelby-guy schtick, which was your opening. It's a Mustang. They're all just F'ing Mustangs. Have fun with it, but it's not a Bugatti, Dude, no matter what the sales guy told you
If you don't like the Shelby-guy schtick, then don't hang around here. You would definately be doing the community a service by not doing so. Your other thread here seems to have the same attitude by you, counterproductive, almost like you have an axe to grind.

You (and others) might want to have a read at the below thread. You showed up with the same attitude and what seemed to be agenda.
(1) GT3 @ Le Mans | Page 8 | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com

My favorite part was when @Epiphany provided solid proof that you indeed do make things up. I think you went away shortly after that. I enjoyed that as well.
 

TeeLew

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In all the years I have been running there, I find that information false.
Then don't use it.

First of all, the pressures on all 4 tires rise at pretty much the same rate. The average rise winds up to be about 8 psi. Again, symetrical. The pressures I run (cold) are 28 left, 29 right front, and 30 right rear. The reason for this (again) is because of the asymetric loads placed on the tires in the outside portion of the banked roval. I didn't come up with this stuff on my own, this was information from the team that developed the cup 2 at Daytona. That care and feeding guide I attached to a previous post was supplied by him. Although that brochure was for the original cup tire, he said that was very much applicable.
So you don't even know what your hot pressures are? I promise you 100% that the tires do not rise the same amount. It might be "close enough" in your world. It's not in mine. Yours are going to have the right hand side pressures come in high. There's a lot more energy put into the right hand tires than the left. This is not a debate.

I don't know what you do for a living
No, you don't and I'm not posting a resume. I've obviously spent plenty of time at that track.


People like you don't last very long around here.
Are you going to not be my friend?


So far, based on the incorrect advice you've been giving so far, I think its the opposite.

(1) GT3 @ Le Mans | Page 8 | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com

My favorite part was when @Epiphany provided solid proof that you indeed do make things up. I think you went away shortly after that. I enjoyed that as well.

I am giving you good information. You just don't want it. I'm not going to back down just because you disagree. If you don't want to use it, don't. Why would I care?

Funny, you mention another scenario where I was giving really good information. I went away because it was a waste of my time. The people in that thread aren't educated enough about Sportscar racing to have the conversation. They wanted to cheer 'their team.' Why get in the way of that? Incidentally, how many podiums have the Mustangs secured since LeMans? What I was saying in that thread is exactly how the season has unfolded. I was trying to temper expectations, because MM are racing a first-year, clean-sheet car. They're actually doing a really good job, but the unrealistic seem to think they're going to consistently finish at the pointy end. Was I clairvoyant?
 

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The people in that thread aren't educated enough about Sportscar racing to have the conversation.
There's no need for that here.
 

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Tomster

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So you don't even know what your hot pressures are? I promise you 100% that the tires do not rise the same amount. It might be "close enough" in your world. It's not in mine. Yours are going to have the right hand side pressures come in high. There's a lot more energy put into the right hand tires than the left. This is not a debate.
Sure I do. 36 left side and 37 right front and 38 right rear due to the load imposed on the right side. They consistently reach those pressures and are tweaked as the day progresses.


No, you don't and I'm not posting a resume. I've obviously spent plenty of time at that track.
So you say. Sure.

Are you going to not be my friend?
Why? Are you lonely?

Funny, you mention another scenario where I was giving really good information. I went away because it was a waste of my time.
If you hate the Shelby types around here, then I invite you to do the same as in your other post, get lost. All of your posts here that I can see are arrogant, condescending and wrong.
 

TeeLew

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If you hate the Shelby types around here, then I invite you to do the same as in your other post, get lost. All of your posts here that I can see are arrogant, condescending and wrong.
Put off by them is a better description and not even the majority...just the special few. My posts have very good information; you didn't like your toes getting stepped on because you have some sort of Daytona complex.

I don't care if you object to my bedside manner. I provided the logic behind every recommendation. If you have an issue with a technical point make it; otherwise, sod off.
 

TeeLew

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You said plenty. No need to comment on what you think others may know with an air of condescension. There are plenty that come here to learn, no need to hand them a failing scorecard.
 

TeeLew

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I did say plenty. Everything I said was correct, including some pretty fine-pointed details, which went completely unnoticed.

The whole FIA/ACO/WEC/IMSA homologation and BOP is too in-the-weeds for most people to care, but it has a massive influence on the racing. My error was trying to give a peek behind the curtain.
 

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Not everything necessitates a response. Your posts have not gone unnoticed.
 

TeeLew

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Lol, don't tell mom.
 

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I got 5.5mpg last weekend with my Gen3 A10 at a track with a single straightaway, my lowest ever.
I think my driving is getting better.

I guess my joke that a '500 uses one tank per session is not.
My Ecoboost gets around 7.7mpg or so on track days.... it doesn't surprise me one bit that a GT500 would only get half of that.
 

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20 ish laps per session, 3.5 miles per lap, 16 gallon tank = 4.3 ish mpg ?

WD :like:
 

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Chin Track day for Daytona is a bit expensive. Miss Audi Group
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