1956 oldsmobile valve spring Q

Hi,

What is the "installed height" aprox. of a 1956 oldsmobile (#10 heads).

I am installing a camshaft 218 duration @.050 with .450 lift and 112 lobe.

Do I need other, better valve springs? maybe beehive springs??

Anton

 

i have a set of #10 heads out back,i'll go measure that for you later.
send me a PM to remind me,because i'll forget.

 

I'll go way out on a limb here, and recommend that you change your 50 year old valve springs.

Ask the cam manufacturer which springs they recommend and use them.

 

I mean do I need other then new stock springs with this lift.

anton

 

my Motors manual says 1956 Olds valve lift @ zero lash is .418 which is only .032 less than the cam you want.

i should have written down my cam specs when i built my engine,but i think it's wilder than the one you wanna run,and i'm using stock springs.
i think beehive springs would work pretty good too.i bet they would probably cost about the same as NOS springs.

 

have a look at this http://www.compcams.com/information/whatsnew/Files/26120%20Beehive%20Spring2.pdf
i checked my books and did some measuring.
stock spring is 1.45" diameter.
coil bind at 1.275"
installed height is 1.875"
i think i'm gonna use beehives when i install my #10 heads!
i'm running #8 heads from a '55 right now.

 

I think you would be happer with a set of new springs. The stock will work with your new cam without coil bind set at 1.83 installed height,,,but pressure on the stock springs is only 85-95 closed, 150-160 open. Not performance matched with your cam,,after being aged not even that good,, shoot for a set around 125-135 closed, just under 300 open ,,,lose the lifters and get new, old stockers go to sleep at too low a rpm . Kinda got to look at the complete system when slipping in a bigger cam.

 

Thanks Yorgatron, Thanks Don_wow

anton