junkyard 396ss coolant advice

[Eric Fahlgren]

Bruce wrote:

> The coolant is exposed to temps in the range of 500dF around the exhuast
> valve seat / guide areas (SBC, at about 1 HP/CID).  It is real easy to flash
> the coolant into steam in those areas.  Steam will absorb little to no heat,
> so in effect at high engine loads you can drive the exhaust valve temps

Yes, which is why it is imperative that you run the highest pressure
system (i.e., high pressure radiator cap) that you can find.  This
reduces the steam bubbles in the head and can significantly reduce
detonation.

-- 
Eric Fahlgren                            Mechanical Dynamics, Inc
efahl at adams.com                          Ann Arbor, Michigan, USA
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org