I am getting a 9C1 LO5 and I was told with a spring change I could run these. Which springs?

Also is the lt4 hotcam lopey? I know the zz4 cam would be streetable but how much worse is the lt4 hotcam? I want to do a cam swap before the motor goes in and swap heads next summer.

 

i have the hot cam in my l98 from a vette (aluminum heads). besides springs, you will have to have the valve guides milled down so the retainers don't smash into them and you will need to get screwed in rocker studs put in so they don't pull out. it's not too lopey, it'll idle at 750 no problem. i just ran a 14.9 in my car with an out of tune holley, if you got an lo5 i would ditch the tbi and put a good carb and intake on. no matter what anyone tells you, tbi was designed for economy, not power.

 

yeah im running a 670cfm carb with an intake...not sure which intake yet...could i run a zz4 cam with just springs?

 

nope, same process applies. i got my guides cut for $2 each, and since the vette l98 heads came with screwed in studs from the factory i didn't have to mess with that, but it shouldn't cost too much. i got the competitors "2300" springs from here: http://www.competitionproducts.com/page24.html They're stock diameter so i didn't have to have the spring seats milled.

 

if i was to get a set of World Sportsman II heads would I need to change anything to run a lt4 hotcam?

 

hmm.. good question. i dont know. i wouldn't think that you'd need to do any work but you should call them and ask things like spring rates and max lift, etc. You should probably be able to give them the cam specs and they'll tell you what, if anything, you need to do. with a roller cam engine you dont want to exceed 350# of spring pressure at full lift and i believe #300 with flat tappet.

 

Im pretty sure the world heads take a .560 lift...most of their heads do anyways.. oh well we will figure something out by this summer im sure,.