camshaft tech info needed

came across a deal on a few cams, both are solid rollers, with cam cards, they read..just need to know the rpm range

cam #1---600 lift intake
578 exh
dur @.050---254 intake---258exh
adv dur------318 intake-----324 exh


cam number 2)---- .648 intake
.651 exh
dur @.050--254 intake-----263 exh
adv-------302 intake-------312 exh

What cubic inch? I'll take a stab at it for ya based on the 2 cams I have had.... 1st one about 6,000 and the 2nd a little under the first based on my 521 setup. Hope that helps some. Whats the LSA?

My cams were 260/268 and the current one is 268/279, the first one peaked around 6,300 give or take some. They were flat tappets also.

Tennessee Bullitt wrote:What cubic inch? I'll take a stab at it for ya based on the 2 cams I have had.... 1st one about 6,000 and the 2nd a little under the first based on my 521 setup. Hope that helps some. Whats the LSA?

My cams were 260/268 and the current one is 268/279, the first one peaked around 6,300 give or take some. They were flat tappets also.

duh...actually they are for a sbf..both cams have 105 lob sep

with a 105 lobe seperation they arent low rpm, torque cams. 3500-6500 range i am guessing

cooter wrote:with a 105 lobe seperation they arent low rpm, torque cams. 3500-6500 range i am guessing

found some cams similar in the comp and crane line up..im really confused now...if i look at just the dur @.050 and find a cam that fits that with the same 105 deg separation..rpm is 4000-7800..if i use the adv numbers it comes with to 4600-8200...cam is for buddies 408 sbf..so the cubes will eat up some of the dur...

the next question you need to ask yourself is what range you need the motor to work in and are the cams you have even close? If these cams are used then spend the money and buy a new cam that matches your combo.

cooter wrote:the next question you need to ask yourself is what range you need the motor to work in and are the cams you have even close? If these cams are used then spend the money and buy a new cam that matches your combo.

X2

cooter wrote:the next question you need to ask yourself is what range you need the motor to work in and are the cams you have even close? If these cams are used then spend the money and buy a new cam that matches your combo.

thats fine, but thats is not what i am asking...just want to understand what rpm range these cams are