supercharger coolant expansion tank question

I have 2 questions...So I found a really good deal on a canton aluminum 4 quart hi capacity supercharger coolant expansion tank. I would be installing this in my 06 GT with a dob manifold and m122 blower on a stock 3v engine so 450 whp will be my cap for now. I wouldn't even be looking at this tank because its prob more tank than I really need but its priced really right. I figure more volume of coolant in the system would give better cooling and I found a good deal on an afco double pass heat exchanger too so cooler is better right?

So I am reading up on this canton tank and on lethal's website they state the tank is for drag racing only. I am not planning on drag racing the car its my weekend evening cruise toy, g to understand what it is about this tank that maybe road trips to beach or NYC so it would be driven for extended time periods. What is it about this tank that makes it only for drag racing? Should I pass on this tank and get one not for drag racing only? I am trying to figure out why its for drag racing only, I hate to pass up on a good deal on something like this. Sorry if the question sounds dumb.

https://www.lethalperformance.com/c...nqSOjQIW8Yby24qC_AOCdDuZacqHLMxxoCgSYQAvD_BwE

2nd question
07-10 gt500's run coolant for intercooler from heat exchanger through the expansion tank then into the intercooler. 13-14 gt500's have a bypass hose so that the coolant doesn't get routed through the expansion tank. I have to assume the bypass hose added to later models is an improvement over the previous years configuration. I am thinking I should model my coolant hose configuration after the 13-14 gt500. Anybody have any input/experience with this?

I also read on DOB's website about relocating the pump to be closer to the inlet for the intercooler because the intercooler will be the most restrictive point in the system so I want the highest pressure in the system to be at the intercooler, that a lot of aftermarket pumps attach to the side of the expansion tank to accomplish this. I am not planning on spending 350.00 on a high volume pump that this could be done with. This mounting of the pump on the expansion tank as an upgrade to cooling system makes me question if the bypass design of the 13-14 gt500 is worth the hassle? Has anybody relocated the oem style pump from the heat exchanger (lower on system) to up higher and closer to the intercooler? I would imagine if the pump is moved up in the system it would need to be someplace where it would have coolant constantly being fed to it like at the bottom of the expansion tank? Sorry for the marathon post just trying to sort things out and design the best system the first time!
Joe

I'd have to think that the tank your looking at is intended for drag racing because of the large cap and drain valve on the tank. Adding ice to the reservoir is a great way to keep temperatures down for a short blast down the drag strip, the larger opening makes it feasible to add ice and the drain lets you remove some fluid to make room for the ice.

It also seems to have a larger capacity (~4 quarts to 2.4 quarts) compared to the alternate part number listed on the lethal performance page.

As far as being drag racing 'only'? Maybe it's a little cya for the drain valve being unintentionally left open or a leaky cap, it's difficult to say.

My understanding of the main reason for a reservoir bypass it to avoid cavitation of the flow caused by a combination of a high flow pump and a restrictive tank fitting. If you're not upgrading the pump cavitation probably won't be an issue.

Depending on the size of the bypass line it will also change the volume of the fluid that is actually circulating in the system. A large enough bypass line will cause the tank to act solely as an expansion tank. The fluid that is actually moving will bypass the tank, so the fluid in the tank appears stationary. Fluid level will only raise or lower as needed due to temperature change etc.

Similarly, an appropriately sized but smaller bypass line will allow some of the flow to bypass the reservoir, eliminating cavitation issues, while the remaining flow goes through the tank, circulating that fluid as well.

At the end of the day there's a trade off in the volume of fluid that is circulating. A smaller volume of fluid heat soaks quicker, but it is also easier to cool the small volume of fluid via the heat exchanger. Likewise, it will take longer for a large volume of fluid to heat soak, ie when racing and using ice in the tank, but it will take a longer time for your heat exchanger to remove all of that heat.

Silver has it right . . that tank is for drag because it allows for easy fill of ice and then drain. I have something similar, and I don't race my car; it is fine for the street.

And yes, the bypass is because the 13/14 GT500 pump creates enough flow that it needs the bypass to avoid extraneous bubbling in the tank which can eventually lock things up.

On mine, I put the bypass down low and the tank is up high. By doing so, I accidentally turned the degas bottle into a true expansion tank . . . all the flow goes through the bypass and virtually none through the tank because it would have to fight gravity to get there. Instead, the tank is now just a place for the coolant to go when it heats and expands - just like the engine coolant overflow bottle.

I once had a large exp. tank - it is a dumb idea. Just more weight and hot water to haul around. The hot side rad already holds more fluid. I have live IAT's in my car and can see what actually affects them - it is not really the cooling system, it is the bypass operating, the air filter sitting in smoking hot air, airflow through the engine etc...

Run the stock 2013 GT500 tank, and build a bypass where the tank is merely the high/degas/fill point. Put a flow restrictor in the line to the tank. You will need two tees to do this.

eighty6gt said:

I once had a large exp. tank - it is a dumb idea. Just more weight and hot water to haul around. The hot side rad already holds more fluid. I have live IAT's in my car and can see what actually affects them - it is not really the cooling system, it is the bypass operating, the air filter sitting in smoking hot air, airflow through the engine etc...

Run the stock 2013 GT500 tank, and build a bypass where the tank is merely the high/degas/fill point. Put a flow restrictor in the line to the tank. You will need two tees to do this.

View attachment 70689

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Maybe mine is an abnormality, but when the bottle is way above the bypass, you won't need a flow restrictor in the line to the tank . . . at least I didn't. All the flow takes the path of least resistance and goes where it doesn't have to fight gravity.

But, I run a Kenne Bell, and the IC is supposed to be pretty restrictive. So, maybe my flow through the whole system is slowed down so much, and that's why I get nothing through the bottle. Cools well though (for a Kenne Bell without the DOB IC solution).

option b!

I run a metal degas with an E-Force on my 05. I bought the pump and bypass kit from DOB. The tank is mounted at the stut tower with the 2 “T’s” directly in front of the tank openings. Only 10% if flow goes into tank with the rest right to the heat exchanger. Works perfectly.

All of the posts above did a great job of answering your question.

I run an aluminum Canton icebox with 1 inch inlets and outlets. That is only so I can run ice at the dragstrip.

For a street car, there is zero reason to have a giant tank. As stated above, more fluid will take longer to heat up - but also take longer to cool down once heat soaked.

The best mods to do in this area are to increase the diameter of all coolant lines, add a Stewart-EMP pump and install the biggest heat exchanger you can fit. DOB is working on one or you can go with Steeda, VMP, Afco or Revan in double or triple pass. In my personal experience - fans make little difference. I flow over 14GPM now with the aforementioned mods.

I do not think the pump location makes a huge difference but it is critical that the pump is pushing into the intercooler, not sucking. If it “sucks”, your coolant lines may collapse. Ask me how I know this:

https://www.s197forum.com/threads/dimoras-intercooling-system-upgrade-operation-iceman.98185/

eighty6gt said:

I once had a large exp. tank - it is a dumb idea. Just more weight and hot water to haul around. The hot side rad already holds more fluid. I have live IAT's in my car and can see what actually affects them - it is not really the cooling system, it is the bypass operating, the air filter sitting in smoking hot air, airflow through the engine etc...

Run the stock 2013 GT500 tank, and build a bypass where the tank is merely the high/degas/fill point. Put a flow restrictor in the line to the tank. You will need two tees to do this.

View attachment 70689

Click to expand...

I somewhat agree with you, the biggest problem is the Air filter soaking all the hot air BUT I do think more volume in coolant will help.
im getting a bigger rsv tank this weekend. I'm upgrading my small stock rsvr that came with my edelbrock..AND if I get a deal on a hood with a scoop that will suck in more fresh air that would be my next mod.

2010 GT, Edelbrock Eforce stage 2

Sent from my SM-G955W using Tapatalk

more volume won't help, you need more flow and a bigger front cooler, good luck

more coolant, more flow, and the larger HE, the better. I had a 3 gallon tank in my trunk that I would pack with ice before a pass at the track.

thanks guys! I wont be tracking the car just ripping around town on the weekends and evenings! I appreciate all the input!!

Sactown said:

more coolant, more flow, and the larger HE, the better. I had a 3 gallon tank in my trunk that I would pack with ice before a pass at the track.

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The reason more coolant worked in your case was because the large volume of coolant with the ice prevented the heat from building up...allowing you to make passes with ice-water flowing through your intercooler.

More fluid volume takes longer to heat up...but once heated up, it takes longer to cool down.

For a pure street car (no ice), a smaller degas (overflow/reservoir) is better.

eighty6gt said:

more volume won't help, you need more flow and a bigger front cooler, good luck

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This 100% for a street car (without ice)

Small tank is all you really need. I made this GT500 unit fit my setup by moving the power steering tank out of the way. Afco dual fan HE...an excellent idea too. Mine got rid of all the heat soak from my lil m90.