How to get a little heat with crossovers...?
05-31-2015 | 08:12 AM
#41
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Joined: Sep 2006
Posts: 2,123
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From: Wis
after installing that thermastat id be watching youre water pressure .. it will jump up fast at higher speeds .. probly will need water relief and water dump .. i spiked to 40 psi in a new york second , just saying .. more too it than just adding a stat .. im no expert though ..
05-31-2015 | 01:15 PM
#44
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Joined: Jul 2008
Posts: 931
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From: Little River SC
I will share my experience with by-pass crossovers. The best water crossover is the one from Stainless Marine, the thermostat housing is cast polished stainless, that has a diverter in which keeps the cold water from confusing the thermostat with cold water. That cold water will, make the thermostat close early NOT ALLOWING, the water to flow the hot water from the last 2 cylinders on each bank. You will never see a high temp reading on the gauge, allowing the rear cylinders to overheat, causing the cylinder head to expand beyond the quench of the gasket.
I experienced; a confused thermostat on a 750 hp 540 NA I was told drill 5-7 holes in thermostat. This issue cost me much time and $$$$, the end result of the cold water hitting the top of the thermostat, wasn't a enjoyable journey, for my clients lost boating time and my time and money to correct the issue. the end result was a dropped valve seat and a bent valve. After repairs were made, a thermo-heat gun determined, 300 + degrees in back cylinders. determining what was going on. The only bypass I us now if needed is from Jerry @ Stainless Marine.
I experienced; a confused thermostat on a 750 hp 540 NA I was told drill 5-7 holes in thermostat. This issue cost me much time and $$$$, the end result of the cold water hitting the top of the thermostat, wasn't a enjoyable journey, for my clients lost boating time and my time and money to correct the issue. the end result was a dropped valve seat and a bent valve. After repairs were made, a thermo-heat gun determined, 300 + degrees in back cylinders. determining what was going on. The only bypass I us now if needed is from Jerry @ Stainless Marine.
05-31-2015 | 02:04 PM
#45
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Joined: Feb 2005
Posts: 570
Likes: 47
From: cincinnati,oh.
I will share my experience with by-pass crossovers. The best water crossover is the one from Stainless Marine, the thermostat housing is cast polished stainless, that has a diverter in which keeps the cold water from confusing the thermostat with cold water. That cold water will, make the thermostat close early NOT ALLOWING, the water to flow the hot water from the last 2 cylinders on each bank. You will never see a high temp reading on the gauge, allowing the rear cylinders to overheat, causing the cylinder head to expand beyond the quench of the gasket.
I experienced; a confused thermostat on a 750 hp 540 NA I was told drill 5-7 holes in thermostat. This issue cost me much time and $$$$, the end result of the cold water hitting the top of the thermostat, wasn't a enjoyable journey, for my clients lost boating time and my time and money to correct the issue. the end result was a dropped valve seat and a bent valve. After repairs were made, a thermo-heat gun determined, 300 + degrees in back cylinders. determining what was going on. The only bypass I us now if needed is from Jerry @ Stainless Marine.
I experienced; a confused thermostat on a 750 hp 540 NA I was told drill 5-7 holes in thermostat. This issue cost me much time and $$$$, the end result of the cold water hitting the top of the thermostat, wasn't a enjoyable journey, for my clients lost boating time and my time and money to correct the issue. the end result was a dropped valve seat and a bent valve. After repairs were made, a thermo-heat gun determined, 300 + degrees in back cylinders. determining what was going on. The only bypass I us now if needed is from Jerry @ Stainless Marine.
05-31-2015 | 02:58 PM
#49
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Joined: Nov 2004
Posts: 14,150
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From: On A Dirt Floor
05-31-2015 | 03:10 PM
#50
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Joined: Jul 2011
Posts: 9,594
Likes: 46
From: Ft. Worth TX
I have not read all the posts but would this help whomever
https://www.cpperformance.com/Instru...540-160200.pdf
https://www.cpperformance.com/Instru...540-160200.pdf
