SB2 cooling help.
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SB2 cooling help.
a friend has these SB2 heads, that have two cooling ports.. they both go to the same place but the smaller has tube going towards the center of the head? we planned to run the back to the radiator pulling hot water out of the head.
Any suggestions would be aweseome!
Any suggestions would be aweseome!
Both of those should go to the water RETURN or radiator to pull
hot water OUT , ..
one with the brass tube goes to the deck between the center ex ports
to keep from blowing the gasket there, .. the other pulls water
from the water jacket in the center, ..
Curtis
hot water OUT , ..
one with the brass tube goes to the deck between the center ex ports
to keep from blowing the gasket there, .. the other pulls water
from the water jacket in the center, ..
Curtis
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- jmarkaudio
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Drag race or circle track? Here is some other cooling info for SB2's.
viewtopic.php?t=7018
viewtopic.php?t=7018
Mark Whitener
www.racingfuelsystems.com
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www.racingfuelsystems.com
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Good work isn't cheap and cheap work can't be good.
Re: SB2 cooling help.
[quote="Jackstand"]a friend has these SB2 heads, that have two cooling ports.. they both go to the same place but the smaller has tube going towards the center of the head? we planned to run the back to the radiator pulling hot water out of the head.
I can tell you this. These water conduits are supplied from the outlet side of the water pump ( presure ) and push water ( intake temperature ) between the two exhaust valves to stop overheating the gasket at that point causing the gasket to fail. The hole or port goes between the two chambers to the intake side. This is not new and SB2 is not the only head that needs this modification. The large one pulls water. Stuart.
I can tell you this. These water conduits are supplied from the outlet side of the water pump ( presure ) and push water ( intake temperature ) between the two exhaust valves to stop overheating the gasket at that point causing the gasket to fail. The hole or port goes between the two chambers to the intake side. This is not new and SB2 is not the only head that needs this modification. The large one pulls water. Stuart.
thanks Curtis, that what i thought
I have read conflicting info on weather to drill the block for coolant holes, did you do that on your motor, or just weld them up?
100mm turbo street car Might see a few local radial races. Thanks mark , I have already read all sb2 discussions on here!! I just didnt see anything on the two ports so i thought i would ask.jmarkaudio wrote:Drag race or circle track? Here is some other cooling info for SB2's.
viewtopic.php?t=7018
I have read conflicting info on weather to drill the block for coolant holes, did you do that on your motor, or just weld them up?
Sure, ..Jackstand wrote:thanks Curtis, that what i thought
I have read conflicting info on weather to drill the block for coolant holes, did you do that on your motor, or just weld them up?
I'd drill the block, . . simple to do and you can't have enough cooling, ..
you are talking about the plug cooling holes right?
c
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http://www.stewartcomponents.net/Mercha ... de=ChevyS4
That link has a picture of were the 2 threaded bosses are located on the side pump for external water feed to the heads.
That link has a picture of were the 2 threaded bosses are located on the side pump for external water feed to the heads.
- jmarkaudio
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robert1 wrote:Someone is going to read this and pull water out here into the top of the water pump. Don't do it. You will then be bypassing the radiator and putting the hottest water the engine makes directly into the water pump and mixing it with water drawn from the radiator.
topic discussed please see:
viewtopic.php?t=12947&highlight=sb2+cooling
Also. check how the cup cars are built. You'll see two water lines piped to the exact location i mentioned.
It sounds logical to pump water in there, but how much water at say 18psi can you pump into an area with say 18psi )…mmmm not going to flow much coolant ..pretty much deadheads…the suction side of the pump is less then the pressure inside block & heads, hence water will flow freely from area.
Obviously this relies on the entire cooling system including pumping water into the side of the block and not the front
Last edited by stealth on Fri Jan 09, 2009 2:28 pm, edited 1 time in total.
Yep..that is not a feed...that is the suction side of pump (the upper small ones on the sides), the larger ones are to feed coolant to the center of the block.Racerrick wrote:http://www.stewartcomponents.net/Mercha ... de=ChevyS4
That link has a picture of were the 2 threaded bosses are located on the side pump for external water feed to the heads.