D. Kuhn Jackson Racing Aftercooler

Here is the dyno:

D. Kuhn contacted me very determined to do this and offered his supercharger manifold, plate, time to develop and test the cooler.

The cores are tested to 45psi with water to check for leaks. Each one is tested and inspected before getting sent out.

The results have been awesome, Dan noticed an immediate improvement in throttle response and power without tuning. He even experienced some lean cut that he had to fix.
Below is the sample of the data he collected during cruising and wide open throttle with the cooler runing with 7 psi setup:

WITH COOLER TURNED OFF AND EMPTIED

with water at core start 71, end 105.2
no water at core start 110.5 end 172.3

That is a difference of 67 degrees. Plus a difference of 30 degrees in temperature rise.

Also, please note that the sensor on the runner is different than the GM sensor and I think it reads slower than our GM sensor. but it gives you some idea as to what is going on in the runner overtime. We had space issues using the GM sensor at the runner and are using a smaller sensor that works with the gauge system.

The temps at the core are using the GM sensor we all have come to love and use and will help compare results.
Also, I want to point out that the GM IAT sensor is located right under the core for this test.
3″ pulley Temperature numbers with GM sensor corrected numbers.
August 29,2009
Ambient 74 degrees
3.0 inch pulley
……………………………………………………………….. …GM
…………………………………………………….. gm………corrected
……………intake……water…..runner……core……..core
10:05am……74.………79.……..75.………64.9.……..79.………. …. start
10:15am……87.………80.……..100.…….78,6.……..90.…. ………idle
10:20am……97.………79.……..109.…….73.6.……..84.……… …..cruise
10:25am…..105.………86.……..117.…….82.4.…….93.…….. …..little wot

11:55am…..101.………80.……..109.……..70.3.……80.…….. ….178.5 before wot
11:55am……na………..na……….na…….122.6.…….133..……… .177.0 after 2,3,4, gears 32 to 103 mph
12:05pm…..105.………81.……..113.……..69.5.…….80..…… ….183.2 shutdown

Peak 10.3 psi
Injector duty 87%

I have gone the simple system to enable those, again with limited budgets to afford cooling on their vehicles. But I guarantee inexpensive does not mean you wil have a broken system in just a few months. I have ran this setup for a year before I decided to bring it to you and driven countless thousand of miles. Dan (this tester) daily drives his car daily.

After testing my setup I found that water refills are non existent. I agreed with Dan to use the water bottle from the OEM radiator for any minor pressure surges. Everything else is very simple and easy to install by almost anyone. This comes from nearly a year of testing on my personal car that is used for leisure driving and racing events. Dan has now driven this for many months and has yet to add any fluids to his car. My two other TwinScrew installs also report not need to refill the system after a few months now driving their vehicles.