Mishimoto Secondary Race Radiator Thread

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Frackz

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curious to hear from Jason@USR how much this help... wondering if it only helps marginally does this debunk the theory that the rad is not getting enough air since the engine still is over heating?
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any installation instructions? curious what will need to go on for this
 

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If anyone has any questions about the various configurations that we tested the secondary radiator in, just ask.....
Hi Jason,

Did you test this on your CTR Track car? I was curious if you removed your prototype hood vent to test this second rad. And if so, which set up offered more relief for a hot engine.

Any insight would be appreciated.

Thanks.
 


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Hi Jason,

Did you test this on your CTR Track car? I was curious if you removed your prototype hood vent to test this second rad. And if so, which set up offered more relief for a hot engine.

Any insight would be appreciated.

Thanks.
I posted on the previous page about the configurations it was tested in:

The initial testing was done on a stock car, with no other mods other than Mishimoto Oil Catch Can, and 18" wheels and tires. Was tested with 50/50 coolant mix, vacuum fill procedure and proper bleeding. Testing was done at Atlanta Motorsports Park and Road Atlanta in Georgia summer heat. The configurations tested were as follows:

Stock hood and scoop with secondary radiator - very little change was seen, no real air flow passing through cooler, but did take longer to reach normal temp on full cold start

Stock hood and scoop with secondary radiator with small fan mounted on top blowing down through radiator - improvement of time it took to heat soak coolant and much better recovery on a cool down lap

Stock hood and scoop with air channel removed to provide forced "cool" air to the radiator (tested with fan on and off) - noticeable improvement to time it took to heat soak, both with fan on and off. Fan does aid slightly while on track but really aids on cool down time (using temp switch auto fan control)

Stock hood modified with more opening cutout from under scoop area, with USR louvered scoop replacement with fan on bottom side of radiator so that the louver panel extracts air from the engine bay (tested with fan on and off) - Similar results to stock scoop without channel, but more improvement still and much more on recovery, was able to bring temps down to normal temp on a partial cool down lap after pushing hard multiple laps to reach 240F+.

I have said it multiple times over our development of the CTR. Every improvement adds up to better results. We have yet to find a real single improvement that solves the problem. Each test we are hopeful for better results and will continue to test more and more, with a stock platform as well as with our heavily modded shop car. This car is very sensitive to many factors, but it also pushes on pretty well through adverse conditions. We will continue to push the boundaries and keep the community up to date on what we find.

To elaborate on your question though, we did use this on our Time Attack car but used it with the Fan and using the Louvered hood scoop panel
 

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Any noticeable changes with IAT’s with a heat source close to the intake manifold(race or normal driving)?
 
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I posted on the previous page about the configurations it was tested in:

The initial testing was done on a stock car, with no other mods other than Mishimoto Oil Catch Can, and 18" wheels and tires. Was tested with 50/50 coolant mix, vacuum fill procedure and proper bleeding. Testing was done at Atlanta Motorsports Park and Road Atlanta in Georgia summer heat. The configurations tested were as follows:

Stock hood and scoop with secondary radiator - very little change was seen, no real air flow passing through cooler, but did take longer to reach normal temp on full cold start

Stock hood and scoop with secondary radiator with small fan mounted on top blowing down through radiator - improvement of time it took to heat soak coolant and much better recovery on a cool down lap

Stock hood and scoop with air channel removed to provide forced "cool" air to the radiator (tested with fan on and off) - noticeable improvement to time it took to heat soak, both with fan on and off. Fan does aid slightly while on track but really aids on cool down time (using temp switch auto fan control)

Stock hood modified with more opening cutout from under scoop area, with USR louvered scoop replacement with fan on bottom side of radiator so that the louver panel extracts air from the engine bay (tested with fan on and off) - Similar results to stock scoop without channel, but more improvement still and much more on recovery, was able to bring temps down to normal temp on a partial cool down lap after pushing hard multiple laps to reach 240F+.

I have said it multiple times over our development of the CTR. Every improvement adds up to better results. We have yet to find a real single improvement that solves the problem. Each test we are hopeful for better results and will continue to test more and more, with a stock platform as well as with our heavily modded shop car. This car is very sensitive to many factors, but it also pushes on pretty well through adverse conditions. We will continue to push the boundaries and keep the community up to date on what we find.

To elaborate on your question though, we did use this on our Time Attack car but used it with the Fan and using the Louvered hood scoop panel
No changes to IAT were seen
As always @JLOracing, thank you for providing your findings and data! We greatly appreciate you guys using some of your track time to test out these products!

Is a fan for sale with it?
There is not a fan provided with the kit, but we do offer a selection of fans that can be added to your order if you're looking to add some extra airflow to the radiator!

-Nick
 


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As always @JLOracing, thank you for providing your findings and data! We greatly appreciate you guys using some of your track time to test out these products!



There is not a fan provided with the kit, but we do offer a selection of fans that can be added to your order if you're looking to add some extra airflow to the radiator!

-Nick
You guys should put a kit together with fans included. Most have OEM styled hood and without the fan there seems to be little benefit to getting this mod.
 

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You guys should put a kit together with fans included. Most have OEM styled hood and without the fan there seems to be little benefit to getting this mod.
using the fan on the radiator is a pretty tight fit, installation is already tight without it. I personally think the simple effective way to make use of it is to remove the rivets that mount the "water diversion panel" to the underside of the hood and then allow the scoop to direct fresh air to the radiator. Keeps from adding the fan, wiring, etc.
 

creativedesignz

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using the fan on the radiator is a pretty tight fit, installation is already tight without it. I personally think the simple effective way to make use of it is to remove the rivets that mount the "water diversion panel" to the underside of the hood and then allow the scoop to direct fresh air to the radiator. Keeps from adding the fan, wiring, etc.
That would be even better. I hope that will be included in the install instructions
 
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using the fan on the radiator is a pretty tight fit, installation is already tight without it. I personally think the simple effective way to make use of it is to remove the rivets that mount the "water diversion panel" to the underside of the hood and then allow the scoop to direct fresh air to the radiator. Keeps from adding the fan, wiring, etc.
That would be even better. I hope that will be included in the install instructions
What @JLOracing racing said :p Fans back there would definitely be a tight fit.

We strive to design our products to not require any permanent modification to your vehicles, and with our testing we found that there was sufficient airflow back through there so there was no need to require modifying the under-hood air channels. That being said, it couldn't hurt to open it up for some extra airflow back there.

Can you guys keep the sale price until the install video becomes available?
Shouldn't be a problem! We're likely to have the installation video up in the next week or two!

-Nick
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