Johnson intercooler pump flow enough?
- Thread starter Sy777
- Start date
Re: Johnson intercooler pump flow enough?
After going through 3 pumps on my Intercooled Impala, I have had this one in for 2 years without a problem. Well worth the extra bucks. I would assume you could adapt it somehow. I had 2 Johnsons and some other brand I forget that crapped out on my and were LOUD.
Choose the GM option for +$80 and you can pick the inlet / outlet size too!
https://www.zzperformance.com/grand_prix/products1.php?id=425&catid=139
You can barely hear the thing running when the engine is off and key is on!
After going through 3 pumps on my Intercooled Impala, I have had this one in for 2 years without a problem. Well worth the extra bucks. I would assume you could adapt it somehow. I had 2 Johnsons and some other brand I forget that crapped out on my and were LOUD.
Choose the GM option for +$80 and you can pick the inlet / outlet size too!
https://www.zzperformance.com/grand_prix/products1.php?id=425&catid=139
You can barely hear the thing running when the engine is off and key is on!
AZtyphoon
New member
Re: Johnson intercooler pump flow enough?
Yes, but at what head? There is a large amount of pressure drop through an aux. intercooler, a factory cche, and our stock intercooler. The use of the rubber hoses helps lower the pressure drop but not that much. I would rather keep the pump at the lowest point, as in the stock location for the most consistent pressure and better priming. I just can't find any data to guarantee a pump for our setup....anyone?
Sy777 said:
Yes, but at what head? There is a large amount of pressure drop through an aux. intercooler, a factory cche, and our stock intercooler. The use of the rubber hoses helps lower the pressure drop but not that much. I would rather keep the pump at the lowest point, as in the stock location for the most consistent pressure and better priming. I just can't find any data to guarantee a pump for our setup....anyone?
AZtyphoon
New member
Re: Johnson intercooler pump flow enough?
:rotf: I doubt that. That's pretty fast. Do you mean gph? That's like 3.7-4.2 gpm - much more believable. Either way I would need to know what gpm at what head. I can't seem to find any info on these type of pumps. I can find flow data for the shurflo, but I want to keep the factory style pump in the factory location...maybe there's not a strong enough pump that I can put there? What do other people with aux. heat exchangers have for pumps?
EcSy#2671 said:
:rotf: I doubt that. That's pretty fast. Do you mean gph? That's like 3.7-4.2 gpm - much more believable. Either way I would need to know what gpm at what head. I can't seem to find any info on these type of pumps. I can find flow data for the shurflo, but I want to keep the factory style pump in the factory location...maybe there's not a strong enough pump that I can put there? What do other people with aux. heat exchangers have for pumps?
Last edited:
Loeryder
New member
Re: Johnson intercooler pump flow enough?
I used a johnson with a dequick lower cche and an atr aux cooler and it still had enough pressure to visibly circulate the liquid in the upper.
Local truck here has dual hayden heater cores set up as aux coolers and he runs dual pumps.
So while it is not necessary I don't think you will hurt anything.
Although there is a point at which the liquid flows too fast to transfer heat efficiently.
I used a johnson with a dequick lower cche and an atr aux cooler and it still had enough pressure to visibly circulate the liquid in the upper.
Local truck here has dual hayden heater cores set up as aux coolers and he runs dual pumps.
So while it is not necessary I don't think you will hurt anything.
Although there is a point at which the liquid flows too fast to transfer heat efficiently.
Foot Performance
Donating Member
Re: Johnson intercooler pump flow enough?
You dont buy any chance have the GM number for this pump.
If flows 6 GPM I like it becuase I can go 90% thread on lines :tup:
NOWAY55 said:
You dont buy any chance have the GM number for this pump.
If flows 6 GPM I like it becuase I can go 90% thread on lines :tup:
20psiGMC
Member
Re: Johnson intercooler pump flow enough?
Gotta call you on that one, Jas
Coolant efficiency actually improves with greater flow. The only way increased coolant speed could have a negative effect is if:
(1) It is excessive enough to cause cavitation (coolant coming away from the exchanger walls).
(2) The pump used becomes so large that it adds heat to the system.
I know some people believed that faster coolant flow was bad after measuring the temperature differential before/after the lower IC and observing it was greater with a slower pump. What you really need to do is measure the total amount of heat taken out of the system, rather than between two specific points, which is a lot harder to do…
There is a point of diminishing returns, but generally speaking, faster is gooder. :thumbsup:
Loeryder said:
Gotta call you on that one, Jas
Coolant efficiency actually improves with greater flow. The only way increased coolant speed could have a negative effect is if:
(1) It is excessive enough to cause cavitation (coolant coming away from the exchanger walls).
(2) The pump used becomes so large that it adds heat to the system.
I know some people believed that faster coolant flow was bad after measuring the temperature differential before/after the lower IC and observing it was greater with a slower pump. What you really need to do is measure the total amount of heat taken out of the system, rather than between two specific points, which is a lot harder to do…
There is a point of diminishing returns, but generally speaking, faster is gooder. :thumbsup:
Foot Performance
Donating Member
Re: Johnson intercooler pump flow enough?
I would have to disagree,
If you take a termostat out of small block they will over heat seen it several times the water does spend enuff time in the radiator to disapate the heat.
I have even seen a car running a 160 stat run 195 degrees al day switched to a 180 and it came down 180 :2cents:
20psiGMC said:Gotta call you on that one, Jas
Coolant efficiency actually improves with greater flow. The only way increased coolant speed could have a negative effect is if:
(1) It is excessive enough to cause cavitation (coolant coming away from the exchanger walls).
(2) The pump used becomes so large that it adds heat to the system.
I know some people believed that faster coolant flow was bad after measuring the temperature differential before/after the lower IC and observing it was greater with a slower pump. What you really need to do is measure the total amount of heat taken out of the system, rather than between two specific points, which is a lot harder to do…
There is a point of diminishing returns, but generally speaking, faster is gooder. :thumbsup:
I would have to disagree,
If you take a termostat out of small block they will over heat seen it several times the water does spend enuff time in the radiator to disapate the heat.
I have even seen a car running a 160 stat run 195 degrees al day switched to a 180 and it came down 180 :2cents:
20psiGMC
Member
Re: Johnson intercooler pump flow enough?
Yep, I believe it. Engine cooling system = lots different then a charge coolant system
Lots of other factors there…
Centrifugal Impellers are most efficient at one speed and have trouble coping with variances in revs. Water passages through the block/heads/thermostat provide restrictions and some pumps are engineered for a specific amount of backpressure in order for the pump to even circulate the coolant properly. Remove the thermostat/change backpressure and you upset this balance…
IC systems are low-restriction and the pump operates at a fixed (ideal) speed.
Effective transfer of heat from the fluid to the metal(s) of the exchanger(s) is not affected by the speed of the fluid, providing the fluid does not lose physical contact with the exchanger(s). The physics of heat transfer dictate you move the fluid faster, you move more heat. (Again, there is a point of diminishing returns). I like to think of it like this: the absolute best scenario you could have would be a medium in the system that would transfer the heat instantly from one exchanger to the other. That’s not possible, but one way to improve what we’ve got is by increasing the speed of the fluid transferring the heat.
Foot Performance said:
Yep, I believe it. Engine cooling system = lots different then a charge coolant system
Lots of other factors there…
Centrifugal Impellers are most efficient at one speed and have trouble coping with variances in revs. Water passages through the block/heads/thermostat provide restrictions and some pumps are engineered for a specific amount of backpressure in order for the pump to even circulate the coolant properly. Remove the thermostat/change backpressure and you upset this balance…
IC systems are low-restriction and the pump operates at a fixed (ideal) speed.
Effective transfer of heat from the fluid to the metal(s) of the exchanger(s) is not affected by the speed of the fluid, providing the fluid does not lose physical contact with the exchanger(s). The physics of heat transfer dictate you move the fluid faster, you move more heat. (Again, there is a point of diminishing returns). I like to think of it like this: the absolute best scenario you could have would be a medium in the system that would transfer the heat instantly from one exchanger to the other. That’s not possible, but one way to improve what we’ve got is by increasing the speed of the fluid transferring the heat.