I bought a cam from my local store and I wanted to compare it to a stock cam. He said it was bigger than stock, but I wan to know how much. My new cam is .490 valve lift, .280 cam lift, lobe spread of 110 duration is 212 @.050" Any info will help. Thanks.

 

According to the Haynes manual, the stock cam lift is .253 intake/ .278 exhaust. With the rocker arm ratio of 1.73 that equals .438 intake/ .481 exhaust. They don't give the duration figures.

 

Thanks a bunch. I just wanted to see how much bigger it was. Thanks.

 

I posted about a month back the stock specs on the late model EFI460 cam.July 16th was when it was posted.Looks close to the specs for the 460-4V cam.