Ideal Water Pressure??
02-27-2003, 06:51 PM
#1
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Ideal Water Pressure??
I would like to know what the consensus is on ideal water pressure for "big power" performance boats (700+hp). I have received some very diverse responses to this question. When posing the question I received these three different answers:
Response #1
Water pressure has to be at least 15-20 pounds at cruising and 25 pounds at WOT.
Response #2
5-10 at cruising and 10-15 pounds at WOT is more than sufficient. Just watch the water and oil temperatures and as long as they remain in the normal range everything is fine.
Response #3
Water pressure is not that important. Just watch your temperatire gauges and as long as they remain in the proper rnage everything is fine.
I would like some additional opinions on this matter. Thanks.
Response #1
Water pressure has to be at least 15-20 pounds at cruising and 25 pounds at WOT.
Response #2
5-10 at cruising and 10-15 pounds at WOT is more than sufficient. Just watch the water and oil temperatures and as long as they remain in the normal range everything is fine.
Response #3
Water pressure is not that important. Just watch your temperatire gauges and as long as they remain in the proper rnage everything is fine.
I would like some additional opinions on this matter. Thanks.
02-27-2003, 08:29 PM
#4
Toxic FORMULA
Platinum Member
I vote for #2 also. 25lbs wot is entirely too much , it may work but like Biggus said ,you're risking blowing a gasket and getting water in the engine ( or out of it
)
)
02-27-2003, 10:34 PM
#6
VIP Member
mine is 0 at idle ,rev motor out gear it may hit 10. running its 15-30 psi, hard its 29-32, wfo trimed up real hard its 32-36psi , therm stat keeps steddy temp.
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02-27-2003, 10:36 PM
#7
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Originally posted by Strip Poker 388
mine is 0 at idle ,rev motor out gear it may hit 10. running its 15-30 psi, hard its 29-32, wfo trimed up real hard its 32-36psi , therm stat keeps steddy temp.
mine is 0 at idle ,rev motor out gear it may hit 10. running its 15-30 psi, hard its 29-32, wfo trimed up real hard its 32-36psi , therm stat keeps steddy temp.
02-27-2003, 11:14 PM
#8
I agree with response #2 as well Jeffrey. That's where my boat engines run and I haven't had any problems with cooling or head gaskets blowing or anything. My naturally aspirated 540's make around 680hp @5500rpm. My conventional deep "V" (no step or notched transom) boat has transom mounted pick-ups for the engine cooling water. We have even done a temp test with a laser temp gun and everything seemed to be consistant with no "hot spots" or anything. The laser temp guns take the guess work out of everything! 
BTW, I run hoses with mechanical water preasure gauges all the way up to my dash so I can see what is going on with my water preasure constantly at every RPM level.
BTW, I run hoses with mechanical water preasure gauges all the way up to my dash so I can see what is going on with my water preasure constantly at every RPM level.
Last edited by KAAMA; 02-27-2003 at 11:23 PM.
02-27-2003, 11:30 PM
#9
i have seen other post on this topic,in the scarab john at pfm put a relief valve at 40 pis so it would not spike the innercooler. my race cars have a 24 psi caps on them. chip at hustler said the psi was ok?cant remember the post ,i think it was in the q&a sec.?i remember some were around 30-32 pis some reported.the gage is were the drain cocks go. i have gotten 15 psi reving out of gear.
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The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
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The Only Time You Have To Much Ammo Is When Your Swimming Or On Fire.
