: I am starting to look into a custom ground
: turbo cam, and was wondering if anyone has
: any suggestions? Lots of good cam grinders
: out there, but is there anyone that knows
: slants?
: Tom

: I am starting to look into a custom ground
: turbo cam, and was wondering if anyone has
: any suggestions? Lots of good cam grinders
: out there, but is there anyone that knows
: slants?
: Tom

: Doug has a cam grinding shop that he uses and
: he has collected "profiles" on a
: bunch of cams. I expect he will add his 2
: cents worth (now that I have goaded him!).
: Chuck

: In any turbo application, you want to use a
: slightly smaller cam than you would use
: normally aspirated and with slightly greater
: lobe seperation. Heat is what drives a
: turbo, not back pressure. In an ideal setup
: where the turbos would be mounted right off
: the exhaust ports, this cam recommendation
: holds true. As you move the turbos away from
: the ports, you loose the availability of
: heat and efficiency goes down. In this case,
: you start to drive the turbos less with heat
: and more with the pumping action of the
: engine. This is why you see 'crutch' cams
: with duration weighted more heavily towards
: the intake. This type of cam design was
: developed many years ago when turbo designs
: were largely inefficient. If you can mount
: the turbos close to the head, then you
: should be able to use a single pattern
: design as I described above.
:
: Mitch