I was thinkin bout running my zz9 cam... what valve springs do i need to get...

i would prefer not to have to have machine work done on the heads...

thanks,
Chris

 

If you dont want the heads machined,then your limited to 1.250 springs.
As far as I know, K-Motion makes the best single H7 spring.Its a 1.265 diameter,.610 max lift,130-lbs at 1.700 installed hieght,and coil bind at 1.050.
Im going to be using these springs on WP heads with .544/.576 lift cam.
Nitro Don

 

sweet...

thats what i wanted to hear...

later,
Chris

 

If it was me, I would give the Cam manufacturing companies a call for suggestions. Springs with too much pressure can be "counterproductive" because the engine would have to make an extra effort to open the valves. The ZZ9 doesn't need too much pressure and eventhough NitroDon didn't mention open spring pressure, they sound like a bit of overkill. Besides that, if you have factory pressed in studs (like I do) you can kiss them good bye; they will all pop loose.
When I first put my cam in, I installed K-Motion springs and after 3 of them broke (Jeg's had misspelled the specs) I called Crower and fixed the problem. They are a bit mo' moni', but they are good quality.
Rick