Thread: 383 air flow ????

Tweet

Dave, it all depends on where you're gonna operate the motor MOST OF THE TIME. On a typical hot street motor where you'll use a cam that makes power from 3000 to 6500 and use maybe a 2800 to 3000 stall converter (yeah, I know you're a 3-pedal kinda guy ), the motor will make more torque with a high-rise, dual-plane such as the RPM or Stealth. It makes little sense to use a single-plane that makes a little more power starting at 6000, but less torque 3000 to 6000, if your rev limit is 6500.

Now, if you're building a race motor and using a cam that makes power 5000 to 8500 with a 5000 stall converter, then it makes little sense to use a HRDP that starts to choke off at 6000.

It's all about using components that will maximize area under curve for the intended purpose.

As you're well aware, that's why we bang on these kids about the COMBINATION.

When I DynoSim'd your combination, I used a fairly short cam because you indicated this is basically a street motor and I wanted to keep it just a little bit tame so that the car would drive a little easier and also to build max torque down low so that when you grab a lower gear and wood it, the torque would be there to turn the car sideways.
Also, as you know, E85 will tolerate 15:1 SCR easily, so I used a cam that makes a very high DCR figure that would be well tolerated on that fuel.

Now, if you want to give me another set of operating guidelines, I'll plug everything in accordingly and we'll see what happens.