<VV> CHT Re: valve seats and "Ping"

[FrankCB at aol.com]

John,
     Of course I didn't NEED the CHT gauge to tell  me there was a 
problem!!  But I did NEED the gauge to tell me how far I  could drive before I had 
to cool off the engine by shutting down and lifting the  engine compartment 
lid.  How far would YOU have driven a Corvair one time  on 3 cylinders and 
another time with NO functioning  fan????   The CHT "told" me how far I could 
drive each time before I  had to pull over and cool off so the engine was 
not damaged.
     Since the average driver will simply not bother to  add water to a 
water injection system, the mfrs. all use intercoolers which are  virtually 
idiot proof.  Oldsmobile found that out the hard way when they  installed water 
injection briefly on their turbocharged Jetfire engines in  1962-63.  It's 
hard enough for the average driver to remember to add  engine OIL when 
needed.  I remember seeing a woman at a gas  station once with NO oil showing on 
her dipstick and the attendant had to add 3  quarts of oil to replenish the 
level.  And yes, he DID push the stick down  all the way into the tubing.
     If water injection was good enough for 20,000 of  our fighter planes 
during WW 2, it's good enough for me.
But maybe "they" weren't "smart enough" then to use intercoolers????
     
     Frank Burkhard
     Boonton, NJ
 
 
 
In a message dated 5/14/2012 8:32:31 P.M. Eastern Daylight Time,  
jvhroberts at aol.com writes:
 
But did you REALLY need a  gauge to tell you there was a problem? Of course 
not. 

And Tom had better  cooling. A LOT. The problem with Bonneville is the 
power is on for a long haul.  Alas, the engine can't store that much heat, like 
it could in a drag strip run,  so, something more was needed. And yes, as 
awful as water injection is, it does  provide improved cooling, well, as long 
as the tank holds out. 

And yes,  a better fan would offer better cooling. Of course, the silver 
lining here is,  the stocker is HORRIBLE, so, any well designed replacement 
will beat the stocker  hands down. And obviously, intercoolers are a proven 
technology, and that's why  all turbo cars made today have at least one, and 
none have water injection!  




John  Roberts