vortec question

[NecroWolf]

i got a stock set of vortec heads and a set of oversize valves that look like they are .100 longer. is it worth the trouble and cost to put these in? and what kinda of adjustments will i have to make to the rest of my valvle train with these valves being .100 longer? i've also got a set of comp cams springs #26918-12, installed pressure of 130 lbs @ 1.80 height. will these be too much spring for a mild cam and stock lifters?

 

[supersports10]

Re: vortec question

valves being .100 longer === pushrods have to be .100 shorter

the 918 springs should be fine on a mild cam, and a set of stock lifters.

you didn't have to machine the heads to put on the 918 springs, and retainers did you... direct bolt on??

 

[NecroWolf]

Re: vortec question

yeah they look like a drop in on the valve springs, they cam with the longer valves and by the box will handle a cam/rocker combo of about 0.600 lift pretty easily. i got my stock pushrods to use with these heads, so i'll probably need 0.100 shorter push rods to use the valves. so is the flow increase from the larger valves worth the cost of machining and shorter push rods?