[TJay74]

The issue with the LT1 isnt it cant handle over 650hp, it is just that on stock internals and more so the piston rings you have to be careful pushing over 650rwhp. The ring gaps are a crap shoot, some have found out that over 650rwhp and tight ring gaps produce broken ring lands on the pistons around the wrist pin area of the piston.

The LT4 fuel system (in-tank pump, high side pump and injectors) will really help you get more out of the setup and do it safely on the tune while adding some other HP mods like a RF CAI and maybe a smaller pulley. You could even have the tuner tune the OEM FPM to boost the voltage as it only costs $50 to unlock the FPM via HP Tuners. After that you are getting into 3rd party fuel pump voltage boosters in order to push the system even further.

You should be able to get to 600-650 to the wheels with the full LT4 setup and tuning the OEM FPM.

I am at 650rwhp now with meth injection and will stay there a bit. I may one day down the road put the rest of the LT4 fuel system in my car and unlock the FPM and see what I can get safely on 91 octane E10 up to maybe E50 if possible and turn the meth injection off, or at least maybe reduce the meth injection duty cycle.

Once I have to get into my engine I plan on drop in forged pistons, forged rods and a cam change to eliminate the AFM stuff and change out the springs. Then shoot for around 750-800 to the wheels at that point.