Looking for some advice from people who have experience tuning these cars or have personal built one to be over 1000hp.

I’ve purchased Kelfords tx-280r/288 head package(Springs,retainers etc) I 100% believe the springs and retainers will hold as they are rated for 1600hp . But the cams are recommended for up to 40psi with a 64mm turbo or bigger. Will be running a GTX3582R gen 2 .i dont believe that will take me to over 1050whp. What are your opinion on this? Should i go with different cams? I was also thinking potentially a small shot of nos?

 

Hey, the Kelford TX-280R/288 cams (with matching springs/retainers) are a solid choice for your high-power Evo 4G63 build targeting 1000+ whp on a GTX3582R. They're aggressive enough for big boost (up to 40+ psi) and will work well with that turbo on pump gas or E85. For over 1050 whp plus a small shot of NOS, they should hold up fine as long as you have good tuning, proper fuel system, and supporting mods. Just degree the cams during install and verify valve clearance with your head. Many guys are making similar power on Kelfords without issues. If you're worried about lift/duration, you could always go bigger later, but these aren't holding you back.