So this winter i am doing a couple things to my motor i should have done when i put it together like verified rocker arm geometry and run vortec heads and a couple other small things. I have read a lot of things about my cam being outdated and a bad design. Its an Edelbrock performer rpm cam. What are the pros and cons with this cam? My current setup is sbc350, 441 heads cr=9.25:1, flat top pistons. Im putting vortecs on this winter which will bump the cr=10.5:1. Any input would be great. Thanks
Got that from Edelbrock's site, guessing that is what you're running. The cylinder head swap will improve the breathing, you will be making more power and torque and moving the peaks higher in RPM. This is a pretty good compromise for street/strip purposes, what are you looking to change?
I wouldn't be too quick to say it is a 'bad design', it's a compromise to make a fairly broad torque curve and maintain some low-speed response. Which way are you tempted to go?
I'm pretty lazy myself so I would be very tempted to run it as-is and see how I like it.
Hope you've got a nice tight quench to go with your calculated compression ratio, or hopefully you're estimate is high.
quench is at .040". I don't want to pull the cam out i just want to hear opinions on it. I plan on running a 3000 stall converter.
I saw a article from chevy high performance and shows how to modify vortecs to accept .525" lift and modify the guides for larger springs. Stock i think its like .450". I will buy the tools from comp to do it. I have the heads sitting at home just waiting to finish the port job and get my valve grinding machine :thumbup: Picking it up for $500 can't wait
I'm a big fan of tight LSA. 106/108 LSA. I like that lumpy idle. AND with the kind of CR you will have with the vortec heads.....you may need the tighter LSA to bleed off a little compression at lower rpm's to prevent pinging. 10.anything is pretty high for todays fuel.
Just a thought,
6sally6
the DCR is 8.5:1 is that alright? I used the calulcator at kb-silvolites site and they said to use the intake closing point and rod length. If the closing point was given at .050 lift like mine was 44* add 15 degrees to that so i got 59*. heres the link http://kb-silvolite.com/calc.php?action=comp
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