One inch pipe has a bore of one inch. One inch pipe to one inch AN
fittings are available from C & R.   I based my decision to use one
inch AN fittings  on several considerations. First even though
standard rad hose is much larger, the thermostat is a major
restriction that every stock cooling system functions with.    The
racers I talked with at SevenStock  replaced the  thermostats with
either 5/8" or 1/2" restrictors.  I asked Griffin for a
recommendation for AN conversion and they said one inch.   I want and
need the ease of routing one inch hose.  However,  I am not saying it
will work.     Jerry

Jerry:

I have 1" pipe ports in my rad, with the AN adaptors to 1" hose.  But
I'm only
cooling 120 HP.

Perry

 
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