What did you do to your Boss 302 or S197 today?

[Mike_FL]

Good fun at Track night in America at Sebring

 

[Fat Boss]

Not today, but a couple of weeks ago I had the rear end fully rebuilt in the GT350. I went through the shop's stringent break in schedule and they changed the oil in it yesterday. It felt great to rip through the gears again, and it's quiet as the proverbial church mouse.

Anyone else headed to Vegas for the Shelby Bash this weekend?

 

[Sjohnson1800]

Well not today but this weekend. Finally got my wife to help me bleed the brakes after the s550 upgrade. Put it on the ground and finally drove it! First time this year now to find a track day I can actually make it to!

 

[Mike_FL]

How’s the brake pedal feel with the s550 brakes?

 

[Sjohnson1800]

Great! Not to much lower than the old one. I used G-lock gs1 pads for the street and so far they seem awsome! If I’m able to make it to any events this year I have some r18s which is what everyone is recommending for them and I will let you know. I know on the old brembos I used g-lock r12s and they were pretty good so excited to see how the r18s do

 

[Bill Pemberton]

The R18s are likely a better choice if at Road America, since they will take more heat and the rumor is you can hit Warp 7 down all three straights on the Elkhart Lake asphalt playground!

 

[Mike_FL]

Would r18s be too much for a 200tw tire?

 

[EF1]

That is another one of those questions where the answer is “it depends”. Not all 200 tw tires are the same. Results will differ based on car weight, driving style, tire size or compound.

For example, I was running R16’s on my 6 piston set ip with 275/35/19 Hankook RS4 or Toyo R888R tires and could out brake the tires. I ran the same brakes at NCM last weekend with 295/30/19 Toyo Proxes R. The tires were a better match for the brakes.

 

[steveespo]

That is another one of those questions where the answer is “it depends”. Not all 200 tw tires are the same. Results will differ based on car weight, driving style, tire size or compound.

For example, I was running R16’s on my 6 piston set ip with 275/35/19 Hankook RS4 or Toyo R888R tires and could out brake the tires. I ran the same brakes at NCM last weekend with 295/30/19 Toyo Proxes R. The tires were a better match for the brakes.

So true, brakes should really only be able to lock (engage ABS) at 90%+ brake pressure. So the tire becomes the variable in the braking equation. Data is how you read into it. Need Wheel speed channels and brake pressure channels activated in the data stream. Then do some testing to see what max brake pressure is (in Mustangs around 1100 psi or so) and then test where brakes show ABS engagement in a high speed straight line full pressure stop. If ABS activity comes in at lower than say 950 psi then you have too much pad bite for the tire, no lock up, you can go more aggressive. this will expand the pad bandwidth for modulation and trail. It is good to experiment to find the sweet spot for bite, heat resistance and modulation feel. Brakes don't just decelerate the car, they help the turn (rotation) and keep grip where you want it. Abrupt changes in brake force can upset how you wat to distribute load to each corner of the car in the entire lap dynamic. Lots of good stuff to learn from pro engineers and driver coaches out there. That is where the real speed will come from regardless of tire or brake compound. Optimize the combination and then optimize the driver. After that the speed will come in all configurations, I was 13 years into this sport before I totally realized that. And now I am finally learning some stuff. Thanks to @Black Sheep @Black Boss , Pete DiSisto, Dean Martin, Craig Capaldi, Sam Paley, Andrew Aquilante, Leo Capaldi, Billy Johnson, Jade Buford and many others who tried to guide me in the right direction.

 

[BlackMetal]

Ordered Hawk HP + front and rear brake pads in preparation for my upcoming very first, HPDE. And scrolling through these forms, looking for some guidance on rotors. I’ve read that you can upgrade the front and rear rotors to GT500 rotors which offer better heat dissipation and stopping power. I’m just trying to find information on that now..

 

[mikeD4V]

Ordered Hawk HP + front and rear brake pads in preparation for my upcoming very first, HPDE. And scrolling through these forms, looking for some guidance on rotors. I’ve read that you can upgrade the front and rear rotors to GT500 rotors which offer better heat dissipation and stopping power. I’m just trying to find information on that now..

2013-14 GT500 moved to a 6 piston caliper with 380mm rotors. The GT500s before that are the same fronts as your Boss.

The rear rotors can be upgraded to the larger 2013-14 size with a bolt on bracket and larger rotor. See link below for kits.

The S550 GT and variants had the same 6 piston front brembo caliper. These rotors came in several colors depending on the variant they were put on. You can use an S550 brembo on an S197 but I believe the rotor must be 2013-14 specific (please correct me if this is wrong). These front 6 piston brembos can be had for ~$250 each.

https://lmr.com/products/10-14-Mustang-Brake-Kits

 

[BlackMetal]

2013-14 GT500 moved to a 6 piston caliper with 380mm rotors. The GT500s before that are the same fronts as your Boss.

The rear rotors can be upgraded to the larger 2013-14 size with a bolt on bracket and larger rotor. See link below for kits.

The S550 GT and variants had the same 6 piston front brembo caliper. These rotors came in several colors depending on the variant they were put on. You can use an S550 brembo on an S197 but I believe the rotor must be 2013-14 specific (please correct me if this is wrong). These front 6 piston brembos can be had for ~$250 each.

https://lmr.com/products/10-14-Mustang-Brake-Kits

You’re correct. Someone posted here that you can upgrade the front brake to the S550 six piston callipers, but you need to order a 2014 Shelby GT500 rotor. I was hoping I could also moved up to the 15 inch front rotor using my 4 piston brembos with a relocation bracket.
I’ll put this upgraded in my back pocket for a winter project.

 

[XJCasper]

After 5 years of doing nothing (medical issues) but collecting parts ), I was forced to get a couple new tires and put the new wheels on.

Sunday, I will replace the beat up, discussing factory steering wheel for an NRG.

Week after that? Stereo time.

And den..... Gotta replace my drivers seat. Having difficulty determining a seat. Need a wide seat, but hearing mixed reviews about if the wide Forza or items will fit in the S197. Anyone have input? Been debating NRG, Corbeau, or Kirby.

 

[Fabman]

After 5 years of doing nothing (medical issues) but collecting parts ), I was forced to get a couple new tires and put the new wheels on.

Sunday, I will replace the beat up, discussing factory steering wheel for an NRG.

Week after that? Stereo time.

And den..... Gotta replace my drivers seat. Having difficulty determining a seat. Need a wide seat, but hearing mixed reviews about if the wide Forza or items will fit in the S197. Anyone have input? Been debating NRG, Corbeau, or Kirby.

KIRBY? Do you mean KIRKEY?
If so, that is my choice.

 

[XJCasper]

KIRBY? Do you mean KIRKEY?
If so, that is my choice.

Freaking autocorrect. Yes, Kirkey.

Do you know how well their wider seats fit in the S197?

 

[Fabman]

Freaking autocorrect. Yes, Kirkey.

Do you know how well their wider seats fit in the S197?

Well I’ll tell ya….I have always used their series 47 seats which were awesome. However, they discontinued them and now there is only a series 65. I just installed one in a car and it’s terrible. I looked online and that’s it…..no more series 47 seats so……Kirkey is out for me.

 

[XJCasper]

Well I’ll tell ya….I have always used their series 47 seats which were awesome. However, they discontinued them and now there is only a series 65. I just installed one in a car and it’s terrible. I looked online and that’s it…..no more series 47 seats so……Kirkey is out for me.

Thank you for the info.

 

[Anti]

You’re correct. Someone posted here that you can upgrade the front brake to the S550 six piston callipers, but you need to order a 2014 Shelby GT500 rotor. I was hoping I could also moved up to the 15 inch front rotor using my 4 piston brembos with a relocation bracket.
I’ll put this upgraded in my back pocket for a winter project.

100% correct. This is the setup I have on my 2007 gt. It works on all s197 year models.

 

[Anti]

Got the garage funk off the ol'gal Friday. Changed fluids in the rear end, transmission, and changed engine oil. Cleaning her up as well.


Also, take a look at those drain and fill plugs. Are the tr3650 plugs not magnetic? They were clean as a whistle when I took them out. The picture of them is exact how I took them out. No cleaning.

 

[Short circuit]

Took it for a spin