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I'm a little concerned about the 52-lb injectors that come with the HO/Stage2 kits. I did some calculation based on some fuel-injector size formula for superchargers and it seems to say 52-lb injectors are recommended up to 550 RWHP with 60-lb injectors for up to 632 RWHP. Also, at 9 PSI and...

Fuel Injector Sizes Needed for GT with a SC question below... More boost PSI = more air through engine requiring more fuel. I found the below formula from AmericanMuscle's website for selecting fuel injector size versus HP...

Nice pic! Do you have 3.31 gears? What's your 0-60 or 1/4 look like with those wider tires?

Thanks for the feedback. Just updated post #1 with the confirmed info. BTW- that is an insane HP boost when you start out with 360 - 390 RWHP factory default and are sitting at 660 - 670 RWHP (72% to 83% HP adder) with no other changes. Whipple is making a lot of GT owners happy with...

10 PSI = 735 flywheel HP (625 RWHP est) 11 PSI = 780 flywheel HP (663 RWHP est) Default pulley produces between 10 - 11 PSI So everything makes sense so far... I consider the Hennessey car as well as some previous posts claiming the default Whipple produced 715 HP (not 735 - 780 HP), so...

Thanks, but the Whipple rep said he can do 735 HP at 10 PSI (see comment #13 on page 2: at 11psi, were at 780 engine HP. At 10psi (stock TB), 735 engine HP). I would think 9.5 PSI is around 715 HP based on the Whipple rep's comment, but just wanted to get it right before I change the HP/PSI in...

At what PSI does the Whipple need to run to make 715 HP at the flywheel?

With a Whipple SC making 717 HP, 3.15 rear axle, and removal of the speed limiter, you can go over 195 MPH in the GT in a straight line without any mods except for a lower suspension (less air going under the car). See post #268...

Just found a video of a Whipple SC pushing the GT to 195 MPH: [ame] Base Vehicle: 2015 Ford Mustang GT, 6-speed manual transmission with optional Track Pack Power • 717 bhp @ 7,000 rpm • 632 lb-ft torque @ 4,400 rpm Performance • 0-60 mph: 3.6 sec. • ¼ mile: 11.2 @ 131 mph • Top Speed: 195.2...

I have a SCT x4 brand new in the box. Was hoping to use it with my supercharger install, but if I go with Procharger, they have the Diablosport and I need to get rid of it. I paid $400 for it. I might still be able to return it to american muscle, but I'm not sure what their return policy is...

Yes, you are correct, this was done by an installer and not the manufacturer. I was hoping that in addition to the manufacturer install manual, they would also release a video. I guess any installer can take a video of their install and kind of promote their shop and show how they properly...

Maybe he can copy and paste his custom H.O. tune in my car if I go with the H.O. kit including the smaller intercooler, but the Stage II will require a new custom tune because of the larger IC with different MAF sensor?

Thanks for the post. I was so excited to see that first listing of $3000 for the PP wheels/tires, I didn't really look for the 'average' sales price. Oh well, what's an extra $1000 when I have so much $$ in the car :)

As far as the installation video option, I think it gives the DIY guy a little more confidence the installation was done right and saves time as it's hard to mess up when you follow a video. Video is not required, but improves first-time installation complexity when available.

What are good (widest rear) Tires/wheels to go with a supercharger for best daily driver street performance that will last at least 15K to 30K miles? If I keep the stock wheels/tires, I don't expect to get much grip, but that means less wear and tear on the drivetrain but also frequent...

How about an installation video also :)

That's a good idea to compare my GT w/o SC to his with the HO and his custom tune. I'm hoping the tune is just copy and paste into my car.

I just found and watched this step-by-step 2015 GT SC installation video! It is showing a Roush install: [ame] Would be nice if other SC manufacturers had a video instead of just a document.

What rear tires/wheels are you going to use? What is the price/hour you have to pay for the install labor for just the SC (without the other mods)? I was thinking about a SC for a while now and really wanted to install one as a birthday gift to myself :)

The D1SC doing it's job. On 93 pump gas we got 703hp/551tq on the stock motor. At what boost PSI? Is it a safe boost PSI for a stock car with no mods? Also, I saw somebody saying they are using 315 mm wide rear tires to get better grip. I think the 315 mm Nitto tires fit a 20 x 11 wheel...