For Jay: Questions: The Great Intake Comparo

[jimeast]

Jay, I have the book, extremely helpful.

I have a 390 stroker  to build and a 427 block that will be built after the 390.  I'm curious about the idling conditions and street-ability of the 390 stroker and 427 (non-stroker) dyno mules you built.  I suspect the cams you used are a little too aggressive for most street rides, but thought I'd ask.  And if you have any data, I'd be curious about the general vacuum conditions these two dyno mules delivered.

[jayb]

I don't have vacuum data on those engines, but with the cams used in them you can figure that the vacuum would probably not be enough for power brakes; you'd have to have an auxiliary vacuum source if you need the vacuum for power brakes.  As far as streetability, I think that is pretty subjective.  To me they are both easily streetable, but not everyone would agree.  They both idle right around 1000 RPM, and you'd want a 3500 stall converter to run them on the street (or a stick). 

I think you could take either one of those engines and convert them to a milder hydraulic roller, and get the vacuum up where you want it for power brakes while maintaining or increasing horsepower on the 390 stroker engine, and probably not losing a whole lot on the 427.