OK i have a 402 with a TFS head in a 98 Camaro stock weight 6 speed 3:73 rear the cam i have is to small and one of them cheater ford lobs which i don't really like that. the car is more of a cruse but a little kick so i was toying with idea but what i want to do is put a 240/244 with a 115 or116 LCA in it now i rather have better spring life and less checking so what would be the HP difference between a xtream RPM cam compared to a XER cam which is kinda hard on the valves and springs opinions needed guys that have shops and had swap cams like this and saw numbers would be great to hear what you found

 

Best thing you can do is to have a custom cam ground for you. I offer them for 370, send me your email in a pm and I"ll send you a questionaire to fill out and get one speced for you. You can either go with it or not, your choice.

 

ya but i don't need a custom cam my question is how much power will ya loose with an extreme RPM over a XER 5 HP 10 HP or more? I can get the cam for $200 my self thanks any ways .

 

I have seen slower ramp speed cams make more power than super fast ramp speed cams, but as long as you keep with a 1.7 rocker, then could just run the XER. I just put XER on my intake lobe and a slow ramp on my exhaust, so you could do the same.

 

ya i really do not want to run a XER lob i just really want to know how much better dose the valve springs hold up some one said the extreme RPM would loose 8hp in the mid rang but pick up more up top 8 to 10hp IM believing