IAT2 Improvements with J2Fab Flow Mod

So I've had a bunch of time on my hands and what better way to social distance than to enjoy a high hp cobra by yourself? I have been doing some datalogging lately and thought I'd share the results of my i/c mods. I have the j2fab modded stock cooler, j2fab flow mod, 7gal trunk tank, stewart emp pump, 1" lines, vmp gt500 h/e and about and 85/15 water to coolant mix. I know everyone battles iat2 temps especially on big boost cars, my car was no exception. I run a gen4 2.9 crusher at 25lbs of boost.
Outside temp at time of pull was 76 degrees and iat1 was 80ish throughout pull. Pull was in 3rd from 2k to 6500. Iat2 started at 114 and had dropped to 86 by the end. So a 28 degree drop and only 6 degrees above iat1. I'd say it's working, not sure how much more you can ask for.
I am in no way affiliated with justin or j2fab but just wanted to share my results. I still have the 2 10" fans on the h/e but they are only used when the car is sitting, if even then. If anything I'd say they are restricting air flow at high speeds. I'll probably just pull them as I rarely use them.
Yall stay safe out there!

I'm really curious how their new intercooler is going to work. I'm really interested in it, but have no motivation to pull the blower right now.

01yellercobra said:

I'm really curious how their new intercooler is going to work. I'm really interested in it, but have no motivation to pull the blower right now.

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The coolant flow increase is ridiculous. My GPM almost tripled and I already had the J2 flow mod etc etc, only thing I switched was the core. I had to redesign my IC tank as it was aerating the tank like crazy and cavitating the pump.

--Joe

I'm not sure of any real world numbers from his cooler or h/e but he does have flow data on the intercoolers. 40% increase in water flow and 35% increase in air flow. Obviously any increase is great news simply for efficiency. I can tell you that my water feed line has a ton of pressure in it. Once it enters the intercooler the outgoing line doesnt have nearly the pressure. So the increase it water flow would be very nice simply to take some of the strain off the pump
But at the end of the day I'll take a 6* temp increase from iat1. For a prolonged pull, something like a half mile, I can see where the extra air and water flow would be beneficial

Soap said:

The coolant flow increase is ridiculous. My GPM almost tripled and I already had the J2 flow mod etc etc, only thing I switched was the core. I had to redesign my IC tank as it was aerating the tank like crazy and cavitating the pump.

--Joe

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Hey joe, you have the new intercooler from justin? What tank are you running?

I'm going to do this set up again eventually.. I dont want to do the trunk mount again though. I think I'm going to use his new HE and IC and try to use my true forged tank and see how that does..

I really dont want to run giant 1inch lines all over again

Im going to order the j2fab cooling kit. I just wish he made a tank that mounts where the stock one is placed. I don't really want to relocate my battery.

Once you see how much this stewart pump flows you'll know why a factory size tank isnt going to work. To be honest I'm not sure how hes getting away with the new 3 gallon tank, must have some serious baffling. My 7 gal trunk tank seems like its barely enough

94slowbra1 said:

Hey joe, you have the new intercooler from justin? What tank are you running?

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Yes I got it 3-4 weeks ago. I have a trunk tank The pic of the flow meter is at the return line to my tank.


Didn't mean to hijack your thread. If you need anything else shoot me a PM.

--Joe

No worries bro. Thanks for the info

94slowbra1 said:

Once you see how much this stewart pump flows you'll know why a factory size tank isnt going to work. To be honest I'm not sure how hes getting away with the new 3 gallon tank, must have some serious baffling. My 7 gal trunk tank seems like its barely enough

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The solution is to install a bypass hose in parallel/around the tank, and a flow restrictor inline with the tank to divert most of the un-aerated flow through the bypass, which will likely be an even less restrictive path than flowing entirely through the tank was. Remaining restricted flow through tank is at a gentle rate.

Stangra said:

The solution is to install a bypass hose in parallel/around the tank, and a flow restrictor inline with the tank to divert most of the un-aerated flow through the bypass, which will likely be an even less restrictive path than flowing entirely through the tank was. Remaining restricted flow through tank is at a gentle rate.

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I think that's how the 13/14 GT500's are set up. The tank is essentially turned into a degas tank to burp the system. A couple guys on the S197 had good results going that route.

Soap said:

Yes I got it 3-4 weeks ago. I have a trunk tank The pic of the flow meter is at the return line to my tank.
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Didn't mean to hijack your thread. If you need anything else shoot me a PM.

--Joe

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When you get it installed can you post up hose photos from under the blower? After I saw his air CFM I was getting ready to buy one. Then I looked at my lines and the stock lines barely fit with my blower. I don't see how I could get the bigger lines to fit but man I would love this.

Stangra said:

The solution is to install a bypass hose in parallel/around the tank, and a flow restrictor inline with the tank to divert most of the un-aerated flow through the bypass, which will likely be an even less restrictive path than flowing entirely through the tank was. Remaining restricted flow through tank is at a gentle rate.

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This was my thought as well... To be honest I just want to keep my true forged tanks.. I was thinking about even running some kinda of second resevior hidden in the fender well to take the blunt of the pump pressure and add more volume. But that project is down the road.. I'm not in florida anymore so I'm not too worried about IAT2s like I was when I was living there. The majority of my driving time up here will be in cooler weather.

01yellercobra said:

I think that's how the 13/14 GT500's are set up. The tank is essentially turned into a degas tank to burp the system. A couple guys on the S197 had good results going that route.

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This is correct.
The ‘13-14 cars do that with the great OEM pump they have. Many guys had to adjust not seeing the water circulation in the intercooler tank.
Easy enough to run a Y and a straight bypass under your existing tank.
Great results OP.
I also run an ice tank and cooling mods on my ‘14 and it’s nice to see IAT2s drop on the drag strip and on long street pulls. Great to keep timing in it full time with E85 and cooling mods.
-J

Interesting, never knew the new cars ran a bypass. So that means the larger the tank capacity doesnt mean cooler temps.
I spoke with justin yesterday regarding the 3gal underhood tank and ge said the are water breaks and baffling to keep the aeration down.
I'll be looking to switch over to one of these soon to get rid of my trunk tank and 1" hoses running from one end of the car to the other.

GodStang said:

When you get it installed can you post up hose photos from under the blower? After I saw his air CFM I was getting ready to buy one. Then I looked at my lines and the stock lines barely fit with my blower. I don't see how I could get the bigger lines to fit but man I would love this.

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Josh,

It was installed the very same day The new intercooler does not change the hose location at all, that is all dependent on his manifold. The nice part about his manifold is if you did not have room you can easily modify it to route the aluminum tubes further way from the blower. Malcolm did something similar, not for blower clearance but for a cleaner routing of the hoses.

I'll be in the garage today and will shoot you a pic on FB.

--Joe

Thanks Joe this pics helped. I look forward to this item.

Soap said:

Josh,

It was installed the very same day The new intercooler does not change the hose location at all, that is all dependent on his manifold. The nice part about his manifold is if you did not have room you can easily modify it to route the aluminum tubes further way from the blower. Malcolm did something similar, not for blower clearance but for a cleaner routing of the hoses.

I'll be in the garage today and will shoot you a pic on FB.

--Joe

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If his i/c truly has the increase of water and cfm flow that he claims they would be very beneficial to the high hp crowd. I'm a sucker for new shiney tech so I'll probably pick one up

Great work, John! And Soap. That's excellent information on a critical weak link of these cars (well, relatively speaking.....these are insane power levels over factory)