S550 2022 Mustang GT Twin Turbo Build Thread Profile - S550 Mustangs

[Ludachris]

Jered, frankly, I do not understand the position the moderator took (nor am I challenging it) , but there are plenty of us that want you to stick around so that we can follow along with your build and see the outcome (including the moderator). I have spent a lot of time looking, and there just are not high quality postings on the internet about forced induction Mustang track cars. It is mostly a lot of speculation and I heard my friend's cousin's car overheated. This thread will truly be unique and let the rest of us learn from your experiences, good or bad, as you move forward and struggle to overcome any issues that arise.

What I am trying to say is that this thread should have some lasting value. Don't let emotion get in the way.

Exactly. Don't be offended by what I said, just make note of the collegial request and go back to participating.

 

[Junkyard Dog]

We ran 7 psi which is simply wastegate. Car already exceeded are goal of a 1:38 with a 1:37.1 at i29 speedway. So honestly we won’t turn it up much from that. As it sits horsepower isn’t the limiting factor in going quicker.

I looked up lap times at i29. I saw a C8 Corvette Z06 hit a 1:37, so that is pretty damn fast for your Mustang. I can't wait to see what more you have in store as you make changes.

Will you wait for spring to hit the track again?

 

[Jered_402]

I looked up lap times at i29. I saw a C8 Corvette Z06 hit a 1:37, so that is pretty damn fast for your Mustang. I can't wait to see what more you have in store as you make changes.

Will you wait for spring to hit the track again?

We won’t be back at the track until spring.

 

[Junkyard Dog]

Where's your interior?

Stripping out all of the excess weight?

 

[Jered_402]

Where's your interior?

Stripping out all of the excess weight?

Going to throw a cage in it. No real middle ground on a car like this, either stock safety or full out. Still will get some stuff back, dash, a/c is staying, power windows staying. Still has to go through a touchless car wash, take me to McDonald’s on a 110 degree day, and sit in a Walmart parking lot without worry. Joke with my friends when I try to explain what I want.

 

[Bill Pemberton]

Well Jered, get the beast done and your fellow Nebraska TMO members will hope to see you running on track at the Mustang Roundup , Fall of 2026. Feel free to call me for any thoughts or where there is someone who can do some work on your car ----- started working at Woodhouse Ford and Chrysler in 94 and by a crazy coincidence I am back with the company again , though in Iowa. Lived in the Omaha Metro for 30 plus years so might be able to give you some ideas on who does what if needed at a later date.

 

[Jered_402]

Well Jered, get the beast done and your fellow Nebraska TMO members will hope to see you running on track at the Mustang Roundup , Fall of 2026. Feel free to call me for any thoughts or where there is someone who can do some work on your car ----- started working at Woodhouse Ford and Chrysler in 94 and by a crazy coincidence I am back with the company again , though in Iowa. Lived in the Omaha Metro for 30 plus years so might be able to give you some ideas on who does what if needed at a later date.

Good chance you know some of my wife’s family from woodhouse. I will pm you.

I will keep that in mind, thank you. For the most part we are using the data from my last wheel to wheel car.

 

[Ludachris]

Yeah, you’re right near where one of the bigger annual Mustang track events takes place. I still haven’t made it out there but you should try to get out to the next one.

 

[Jered_402]

Yeah, you’re right near where one of the bigger annual Mustang track events takes place. I still haven’t made it out there but you should try to get out to the next one.

I haven’t been to the actual event there either but raced at motorsports park Hastings plenty of times.

 

[Dave_W]

Curious about your turbo layout based on the photos you posted. It looks like the turbos are back around the back of the gearbox - is that right? If so, do you find you have any boost lag from the longer exhaust length before the turbo, compared to "traditional" layouts with maybe 10-20 inches of exhaust header before the turbo?

 

[Jered_402]

Curious about your turbo layout based on the photos you posted. It looks like the turbos are back around the back of the gearbox - is that right? If so, do you find you have any boost lag from the longer exhaust length before the turbo, compared to "traditional" layouts with maybe 10-20 inches of exhaust header before the turbo?

Pictures are super deceiving. My connection pipes are as short as you can make them without using an entirely new manifold. It does have 1800hp worth of turbos on this engine with larger 1.05 a/r. But even then lag isn’t an issue at all, we are never waiting for power.

 

[Jered_402]

Quick video from a private track day with just us on the track. As you can see Justin isn’t waiting for power, more like grip etc.

 

[Junkyard Dog]

For the most part it’s still a factory cooling system, straight water, reische stat, removed all the active ducting. It’s only on 7lbs on e85, and it was only 65-70 degrees when we took it out both days. So keeping it under 240 cylinder head temps wasn’t much of an issues at all. We can’t monitor oil temp yet, and wasn’t worried about them since we don’t rev this car as high as the last one.

Add in 100 degree weather and it will need some solid upgrades. Which are coming.

(1) No oil cooler?

(2) Were these typical HPDE sessions, 25-30 minutes, 5 times a day?

(3) And how hard were you pushing? I am not asking you to rate yourself as a driver (I know, for instance, I am a novice, so my 100% might be 60% or worse for somebody in the Advanced category). What I am asking is, were you pushing the car hard or babying it? This might be a stupid question in light of the 1:37 lap time, but, well, I am big on asking stupid questions, and I have no idea whether with boost that car has much shorter lap times in it if pushed a little harder.

(4) Somebody asked about lag. Coming off an apex, as you gently get back onto the throttle, does boost just unexpectedly show up at some point, or is it a linear application - basically you are still controlling the torque to the rear wheels with the throttle the entire time?

I ask the last question because I am very aggressive (for a beginner, or, more frankly, maybe because I am a beginner), would the boost suddenly come in when the turn is not yet completed and turn the car sideways? Or is that going to require me to push the gas pedal too far, like when it is normally aspirated?


Sorry for so many questions, but I am so fervently hoping that a twin turbo track car can work for fun HPDE days.

 

[Jered_402]

(1) No oil cooler?

No but this was only for two private test days. On cooler days, factory oil maintainer still operational, and don't need to take it to 8,000 rpm. RPM is what really puts heat into the oil on coyotes. I will be installing one for next year.

(2) Were these typical HPDE sessions, 25-30 minutes, 5 times a day?

Generally speaking yes. But we aren't out there for max track time, just quickest lap time. One warmup, 1-2 Maybe 3 hard laps and a cool down. Its either going to do what we want or needs a setup change. No reason to be out 20 minutes if it sucks.

(3) And how hard were you pushing? I am not asking you to rate yourself as a driver (I know, for instance, I am a novice, so my 100% might be 60% or worse for somebody in the Advanced category). What I am asking is, were you pushing the car hard or babying it? This might be a stupid question in light of the 1:37 lap time, but, well, I am big on asking stupid questions, and I have no idea whether with boost that car has much shorter lap times in it if pushed a little harder.

Justin, who you will see driving it the most, is by far the best driver I have ever been around. He is a solid 100%. He is who runs the driving school at our local track. I am a 70%-80% but my time on the track is usually focused on specific setup changes, rather than lap times.
Our 1:37.1 is quick at our track, there is enough bad that we cant push it everywhere. ABS is absolute trash, so we had to brake early. Way more early then we should need too on the equipment the car has on it. IF that was the only thing we fixed for next year the car would do a 36 if not a 35 alone. Can only push someone so hard without knowing if it will stop.

(4) Somebody asked about lag. Coming off an apex, as you gently get back onto the throttle, does boost just unexpectedly show up at some point, or is it a linear application - basically you are still controlling the torque to the rear wheels with the throttle the entire time?

Incredibly linear. Way more then we ever thought it would be. But a good quality tune with road course in mind with linear throttle maps are important.

I ask the last question because I am very aggressive (for a beginner, or, more frankly, maybe because I am a beginner), would the boost suddenly come in when the turn is not yet completed and turn the car sideways? Or is that going to require me to push the gas pedal too far, like when it is normally aspirated?


Sorry for so many questions, but I am so fervently hoping that a twin turbo track car can work for fun HPDE days.

It shouldn't be a problem, you just have to remember to roll into the throttle. So the goal isnt apex then full throttle like say miata would be, it becomes apex then how much throttle can I apply without losing traction and apply more as traction allows. Adds another level to learn but it can be done.

Hopefully answered your questions. Please ask away.

 

[Jered_402]

ABS

One of our main issues with the car currently is the factory base model ABS. The car started as a base model with base gt brakes. But with the upgraded Essex AP brakes and race pads it was not a pleasant experience. We didn't have threshold braking , we had threshold abs. First day we used the base master cylinder, which gave us a not going to slow down to full ride abs stop.

So we decided to throw on a performance pack master cylinder and booster. The next track day was a bit better. We actually had a little more pedal before we were fully on the abs. I personally wouldn't call a pp master a "fix" but it does help. It would be crazy to say it does nothing.



My last car I went full manual brakes with no abs. Which was ok, but didnt want to go that route again.
Decided to go down the Bosch Motorsport ABS rabbit hole. Picked up a take off m4 unit, and found a harness from Andrew at Phoenix back from his s197 days that will fit fairly good.




Got the pump all mounted up in the factory location, still utilizing the factory rubber isolators.



Picked up a gspeed sensor mount. m4 only uses the front but figured i would install both if i ever upgrade to a m5 or monitor the rear with a datalogger.





Getting all the sensors to read was a bit of a trail and error. But think we have it nailed down.

 

[Junkyard Dog]

On my Dark Horse with the Trofeo RS tires, coming downhill at triple digit speed, I could practically stand on the brake pedal without skidding or ABS coming on (seriously, I felt like I was doing a one leg, leg press). The car bled off speed so incredibly quickly that I found it hard to believe (it was not something I had previously experienced). I attributed that great braking performance to the tires, but I have not changed anything, so it is just as Ford engineers set it up, down to the brake pads and tires.

ABS never activated in the track.

 

[Junkyard Dog]

Decided to go down the Bosch Motorsport ABS rabbit hole. Picked up a take off m4 unit, and found a harness from Andrew at Phoenix back from his s197 days that will fit fairly good.

Does this allow you to change settings, to "tune" it, or is it just so much less aggressive?

 

[Jered_402]

Does this allow you to change settings, to "tune" it, or is it just so much less aggressive?

Yes. We have 10 settings of adjustment. It’s all based on Bosch’s algorithm that takes the vehicle specs into consideration. Should be a much better experience.

 

[Dave_W]

I ask the last question because I am very aggressive (for a beginner, or, more frankly, maybe because I am a beginner),

you just have to remember to roll into the throttle.

This. Always. Even in low-power cars. IMHO, if you can stomp the gas pedal to the floor on corner exit, you're getting on the throttle too late, you're not carrying enough speed mid-corner, and/or you've got too much understeer built in (at least in a RWD car). As a novice, if you're developing muscle memory of stomping on the gas, you'll just have to spend time to unlearn it later. Try to smoothly feed in throttle as you unwind the steering wheel on corner exit, so you're at WOT when the wheel is straight. As an example, concentrate on watching the steering wheel angle while listening to the engine note in the video above.

Smooth is fast.

 

[Jered_402]

Got a lot of work to do on the interior, slowly getting evening pulled out.


Rear wind also showed up from Hurley Racing Products. Had a single element last time, no rule book means dual element and a bit wider.
Designing the uprights as well, 3d printing sure helps test ideas.