I'm swapping in a late 70s 302 that has gt40p heads and I need to put in a 351w cam so I can run it with my h.o computer in my car. I want to put a decent size cam in it and need help with trying to find valve springs for a hydraulic flat tapper can not a roller that I can just drop in with no machining links or part numbers would be helpful thanks
Fox Gt40p Valve Spring Question
- Thread starter Scrappy91
- Start date
-
Sponsors (?)
In general, roller cam springs have more closed seat pressure than a flat tappet cam. The exception to this is roller cam springs used in trucks and SUV's
Roller cams have faster lift rate that flat tappet. This gives the same HP without so much duration and overlap that it causes low speed performance losses when used in a street driven car.
Roller cams have faster lift rate that flat tappet. This gives the same HP without so much duration and overlap that it causes low speed performance losses when used in a street driven car.
Attachments
Last edited:
mikestang63
SN Certified Technician
Actually more like a .496/.520 lift
thats why I don't want roller springsIn general, roller cam springs have more closed seat pressure than a flat tappet cam. The exception to this is roller cam springs used in trucks and SUV's
Roller cams have faster lift rate that flat tappet. This gives the same HP without so much duration and overlap that it causes low speed performance losses when used in a street driven car.
Similar threads
