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Discussion Starter · #1 ·
i have 335 vortex heads.....268xtreme comp cam stock springs.. it pulls all the way 5500rpm....an i want more so i was thinking about mill the heads to get higher compression an going with a 294 but im open to suggestion???????
 

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Do you have any of your motor specs, chamber volume, piston dome or dish, piston volume, compression height, or anything to calculate you're current c.r.? How much compression are you looking for? Pump gas friendly? After 5500 rpm's do the valves float? That's not exactly a monster cam, but stock springs? Thinking about going to a 294 what? Cam?

I'm not sure what your thread title "Vortec 294???" means.
 

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Discussion Starter · #3 ·
its basically a late model 350 i got machined 30 over.......flat top pistons 4 valve relief......9:5:1 compression......670 street avenger...1.5 rockers...street fire disrupter 2800 torque coverter......after 5500 rpm the valves do float.....i was thinking bout goin with 294 extreme comp cams and milling the heads but im open to suggestion?????
 

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Simple answer, your springs aren't up to the task if you're floating valves, that's the end of the motor pulling or revving. Put in a larger cam and it'll get worse. You need to use the manufacturer's recommended springs for that cam.
 
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