Rigging/plumbing things
02-08-2017, 08:11 PM
#12
That is at idle though. At 6000rpm screaming across the lake, making big hp, and big HEAT, I am sure the system is capable of much more water flow. I'd want to keep those headers as cool as possible, by giving them as much water as they can take.
At idle speeds, you aren't seeing 1300, 1400, 1500+ degree exhaust temperatures.
02-08-2017, 08:17 PM
#13
I think the big problem with headers, especially at idle speeds, is the distribution of water. Each tube is its own channel so to speak. Its being fed from a single line. There is no guarantee, that each tube, gets an even amount of water flow.
I know for a fact, certain tubes tend to run hotter than others on mine, at idle. one of the things I was looking into last year, was a better drive ratio for the water pump.
In the aftermarket world, say with roots blowers, alot of the crank accessory pulleys, are small. Smaller than mercury used. That slows the pump down. I did some calculations last year, and forgot what they were, but just because you may be idling at 700 engine rpm, depending on the pulley setup, your pump certainly may not be.
I know for a fact, certain tubes tend to run hotter than others on mine, at idle. one of the things I was looking into last year, was a better drive ratio for the water pump.
In the aftermarket world, say with roots blowers, alot of the crank accessory pulleys, are small. Smaller than mercury used. That slows the pump down. I did some calculations last year, and forgot what they were, but just because you may be idling at 700 engine rpm, depending on the pulley setup, your pump certainly may not be.
02-08-2017, 08:21 PM
#14
Platinum Member
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iTrader: (6)
My headers have a 1 inch ID connection to the the distribution manifold and the same size ( single ) to the tail pipe, Im a bit concerned going to a -12 5/8 ID connection on the input side of the header.
02-08-2017, 08:25 PM
#15
Charter Member#568
Charter Member
These builds are the first for me not running a circ pump, going with a cross over with the whipple water pump delete kit, Im running CMI sweepers, it would be nice to know what the gap is between the primary and outer tube. if you put a large amount of water volume to the header manifold and it cant disperse it through the tubes you build pressure.
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Straight bottoms and flat decks
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Last edited by bck; 02-08-2017 at 08:39 PM.
02-08-2017, 08:28 PM
#16
Registered
iTrader: (3)
I think the big problem with headers, especially at idle speeds, is the distribution of water. Each tube is its own channel so to speak. Its being fed from a single line. There is no guarantee, that each tube, gets an even amount of water flow.
I know for a fact, certain tubes tend to run hotter than others on mine, at idle. one of the things I was looking into last year, was a better drive ratio for the water pump.
In the aftermarket world, say with roots blowers, alot of the crank accessory pulleys, are small. Smaller than mercury used. That slows the pump down. I did some calculations last year, and forgot what they were, but just because you may be idling at 700 engine rpm, depending on the pulley setup, your pump certainly may not be.
I know for a fact, certain tubes tend to run hotter than others on mine, at idle. one of the things I was looking into last year, was a better drive ratio for the water pump.
In the aftermarket world, say with roots blowers, alot of the crank accessory pulleys, are small. Smaller than mercury used. That slows the pump down. I did some calculations last year, and forgot what they were, but just because you may be idling at 700 engine rpm, depending on the pulley setup, your pump certainly may not be.
02-08-2017, 08:29 PM
#17
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iTrader: (6)
02-08-2017, 08:39 PM
#19
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iTrader: (6)
Mild, with your stellings dumping a 3/4 inch fitting per tube to the tail, I have to think there is a larger volume of water passing between the inner and outer tubes compared to the CMI
02-08-2017, 08:41 PM
#20
Banned
iTrader: (9)
that is correct about not much area gap in between the header tubes especially at the bends and very easily for stuff to collect / clog in those narrow areas causing restrictions of water flow thru, hence why sometimes one header portion of the header runs hotter than the one next to it,
