Thread: Finally Building the 350 this week... what do you think about the setup?

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..hmm... so can I keep everything else I have and just swap out the cam? I hope that's what you guys are telling me. What cam would be the best with the rest of the setup staying the same?

Originally Posted by 67CamaroProject

..hmm... so can I keep everything else I have and just swap out the cam? I hope that's what you guys are telling me. What cam would be the best with the rest of the setup staying the same?

No you can't. With 10.7 static c.r., if you shorten up on the cam, you'll raise the dynamic c.r. to the moon, making so much cylinder pressure that the motor will not operate on pump gas. You are pretty much optimized with your combination right now. I just don't think you're gonna like it for very long.

The only way to do the whole thing differently is to start over with either different combustion chamber volume or different piston crown volume to lower the static c.r. to where it will be pump gas compatible (around 9.0:1) with a short cam. The shorter cam will make power down lower and you won't have to run a high stall converter.

Bottom Line: Maybe you have spec'd the motor the way you want it. If that's the case, bolt it together and enjoy.

Originally Posted by techinspector1

No you can't. With 10.7 static c.r., if you shorten up on the cam, you'll raise the dynamic c.r. to the moon, making so much cylinder pressure that the motor will not operate on pump gas. You are pretty much optimized with your combination right now. I just don't think you're gonna like it for very long.

The only way to do the whole thing differently is to start over with either different combustion chamber volume or different piston crown volume to lower the static c.r. to where it will be pump gas compatible (around 9.0:1) with a short cam. The shorter cam will make power down lower and you won't have to run a high stall converter.

Bottom Line: Maybe you have spec'd the motor the way you want it. If that's the case, bolt it together and enjoy.

Tech,are using part Speed Pro #H345cp in your formula when you are figuring the comp. ratio?