Guys,
I need some help making some decsions on what cam I am going to use. I went through the old threads and there were a few ideas but here goes. My motor is a 340hp car motor .30 Ross 10.5:1 forged pistons, I will be using the 817 heads however we are doing some work to the heads. Bowl blend and so forth and adding larger valves. I have been on the phone with Comp Cams several times and they have been most helpful but it has been my experience in the past that the cam grinders offer a little more conservative profile than you would like. What they reccommend is 236@50 with a 561 lift 108 lobe center and then advancing cam 4 degrees. Not knowing these engines that well will this have a rough lopey idle? I am going for that nasty drag car idle but still able to run. I am putting this in a 34 Ford, 700 R4 4:11 gears 32" rear tires. They reccommend a 2500 stall converter. My other question is that the valve springs they reccommend 911-16 have an installed height that will be hard to get. Is it common to use longer valves in these engines to attain the desires spring pressures? Any problems to look out for? Do the push rods need to changed as well, guide plates needed......
Any help would be greatly appreciated.
Thank You,
JM
I need some help making some decsions on what cam I am going to use. I went through the old threads and there were a few ideas but here goes. My motor is a 340hp car motor .30 Ross 10.5:1 forged pistons, I will be using the 817 heads however we are doing some work to the heads. Bowl blend and so forth and adding larger valves. I have been on the phone with Comp Cams several times and they have been most helpful but it has been my experience in the past that the cam grinders offer a little more conservative profile than you would like. What they reccommend is 236@50 with a 561 lift 108 lobe center and then advancing cam 4 degrees. Not knowing these engines that well will this have a rough lopey idle? I am going for that nasty drag car idle but still able to run. I am putting this in a 34 Ford, 700 R4 4:11 gears 32" rear tires. They reccommend a 2500 stall converter. My other question is that the valve springs they reccommend 911-16 have an installed height that will be hard to get. Is it common to use longer valves in these engines to attain the desires spring pressures? Any problems to look out for? Do the push rods need to changed as well, guide plates needed......
Any help would be greatly appreciated.
Thank You,
JM