On 04/22/2013 02:31 AM, harry wrote:
> On Apr 21, 11:21 pm, Ashton Crusher > wrote:
>> I was thinking of putting a higher pressure cap on one of my cars to
>> increase the factor of safety against boiling. Looking thru the web
>> for info on the likelihood of changing from 7 psi to 13 psi causing
>> leaks I found little on that issue but did find a couple references to
>> the pressures created by the water pump. One site boasts of a 19 PSI,
>> $25 cap to get you thru your "hard driving".http://www.mishimoto.com/mishimoto-h...tor-cap-13-bar....
>> Thought I'd see if anyone else has heard of this. The claim was that
>> the water pump could create over 30 PSI of pressure. Since that is
>> double the normal operating pressure of most modern cars I find it
>> hard to believe. If the system was at full 15 psi of pressure while
>> the car is idling and then your floored it and ran it up to near
>> redline and created another 30psi of additional pump pressure, or
>> even 10 psi of additional pressure downstream at the radiator cap, you
>> would immediately cause the system to have to vent to the overflow to
>> relieve this higher pressure. I've never seen a car vent due to me
>> revving the engine up while I'm working on it. Thoughts?????
>
> The only way to increase the system pressure would be to change the
> thermostat to a higher temperature one so increasing temperature as
> well as pressure.
> You would then have to change the radiator cap too. But changing the
> radiator cap alone wouldn't change the pressure but in the event of
> engine overheat/pressure would negate the protection it gives.

What? you haven't any clue how a cooling system works do you? Please
just shut up if you don't have any knowledge of what the **** you're
talking about.

nate


--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel