wat valve springs should i use?

[toolman162002]

what valve springs should i run with my comp cam 306 i was thinkin comp cam 26918-16 or the comp cam 26986-16 any ideas? or wat have you guys used with ur cams?

[hoogiesngrinderz]

The 918's will fit stock heads, I think the 986's require the spring pockets to be machined. I'm pretty sure I used Lunati 73815K5 with my custom ground Comp Cam (.575/.585 lift) but I'm running aftermarket heads

EDIT: That was for my old SBC heads. I'd have to look up installed height and seat pressures to see what would be better for an LT1

[toolman162002]

i have stock heads on my sbc. i went to comps website to see wat the recomend and it siad the 918's but i went to summit racing and talked with them and the suggested 986's but i just want to see wat other's opinion on and wat i should run and wats better for my money.

[hoogiesngrinderz]

918 are single beehives and tons of people run them with the cc306, they will handle that cam into high RPM's and you won't have to worry about machining the pockets

[toolman162002]

ok thanks alot!!!

[hoogiesngrinderz]

Don't just toss a set on and call it good though. Work with a good cylinder head guy to get proper spring height and seat pressures, as well as proper geometry. I had to run +.100 stem valves to get springs squared away. Proper pushrod lengths will keep the geometry in check (centered on the valve tip)