How many miles on your car? Let us know if you think it runs better. Will you be upgrading the spring stiffness or using the oem .550 springs?

 

28k miles.2014 so I am just changing them while I install the supercharger.I will use the BTR replacement springs for now.May do a cam on the next round of mods.

 

Now you will have to decide if you install the .550" lift or the .660" lift springs.

 

Good luck finishing it up!

I'm doing my valvesprings this week as well, as I have a 2015 and don't want to risk them breaking. I went with BTR 550 springs.

Trying to take care of all of the preventative maintenance items so the worst-case scenario doesn't happen.

 

Get the,,,, Bluegrass Performance BPPLT1DVST Valve Spring Compressor,,,,, Made the job much easier than the single spring compressor. I made sure the piston was at TDC on the left side, it was such a pain in the ***, I didn't worry about it on the right side. I used the hose and pressurized the cylinder to 140 PSI. JB has the 14mm thread hose for $17. With the spring compressor tool I didn't put any downward pressure on the valves. Make sure you watch the end of the valve when compressing the spring, to be sure it doesn't push down. I replaced the valve cover gaskets, the valve keepers, and the valve seals also.
The hardest part was getting at the right rear spark plug hole. It took me an hour to thread the hose into the spark plug hole to pressurize it. I was able to move the coolant tank out of the way without disconnecting the bottom hose, it didn't leak hardly any fluid.
As long as I had the plugs out I replaced them also. Have fun.

 

what the heck do you have that makes 750 hp NA?

 

Let us know how it goes.