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Discussion Starter · #1 ·
Looks like the new 4V head design & Navigator intake cams work pretty damn well on the Mach 1 4V:

Both my 4V engines had ~ 700 miles on them when I tested, and were bone-stock - right down to the paper filter & intake silencer/snorkle.

Runs were done ~ 2 years apart (for obvious reasons), but it is the same dyno.

No wonder the Mach 1 stock feels like my '01 did with the 4.10 gears installed!
There's lots more torque down in the lower RPM's, while nothing is lost up-top until 6800 rpm.

I wonder how this thing will respond to a few "minor" bolt-ons.... :D
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