Dual heat exchangers

[racebronco2]

I thought about this on monday after the last track event. Picked one up from a friends shop. The heat exchanger fit perfectly in the upper grill area. The hard part was to fab up some brackets to mount the heat exchanger to the body. It worked out really well. I will try and put it all together tomorrow and do some testing after i get back from the valley.
Lower bracket attached to the heat exchanger

 

[03 DSG Snake]

op:

 

[98 Saleen Cobra]

So you are going to run one heat exchanger on top of the other?

 

[mu22stang]

Very interesting idea. Wouldn't you want the flow to start at the top and work its way down? It appears your flow is from the I/C pump to the bottom fitting of the new upper h/e, to the top fitting of the new upper h/e and then down to the bottom h/e.

 

[racebronco2]

I am changing it a little. According to a thermal engineer i need to run them paralell. The fitting are where they are at. It would be idea to plumb the top so that gravity helps the water to flow downwards.....I might try and see if i can plump both tops. Thanks for pointing that out. I guess since it all went together so easy i didn't think about a few things.

 

[mu22stang]

I am changing it a little. According to a thermal engineer i need to run them paralell.

I see. Perhaps the parallel recommendation is to reduce resistance on the pump? I had a conversation with an HVAC expert on this site a while back and he informed me that maximizing/increasing flow (airflow or coolant flow) is the best way to improve efficiency in a heat exchanger system. You've seen that firsthand by boxing the h/e and radiator. I wonder how the extra resistance (y-fittings, more frictional head loss, bends, etc.) will affect the improvements. Several guys on here use a Meziere water pump to increase flowrate (Tractionless1 comes to mind). That may be a way to claw back some gpm if it is in fact lost.

 

[racebronco2]

A little update. Me and a friend were doing some datalogging, his 500hp 03 cobra with no cooling mods except the head cooling mod and mine with almost everyone. While cruising thru the mountains my ait1's were about 20* cooler then his were and our ait2's were about the same. While idling his ait1's and ait2's did go up relatively quick.

On the dyno i datalogged several of my dyno runs in january and in april.
In january the ambient temps were 72 degrees vs in april 80 degrees. All ait2's were taken at the same rpm at wot which is 3000rpms and 6800rpms.
January at 3000rpms ait2's were 112* and went to 118*. April we did 3 runs back to back runs. 1st run started at 82* and ended at 90*, 2nd run 90* and ended at 98* and the last run was 98* and ended at 106*. So far the temps look to good to be true. I am going this weekend to an open track event so i should have some more data.

 

[racebronco2]

I did check the flow in the reservoir and it looks just like it before the added heat exchanger. From what the engineer told me is that if you run the h/e in a series the restriction does go up but if you run them in paralell the restriction goes down and the flow increases which in turn is able to pull more heat out of the intercooler. I did check out the heat differences between the two heat exchangers at idle and the temps in and out are almost exactly the same.

 

[Blkkbgt]

What exactly are you talking about when you say you are running them parralell? Is the coolant being devided between the to heat exchangers?

 

[racebronco2]

What exactly are you talking about when you say you are running them parralell? Is the coolant being devided between the to heat exchangers?

yes.

 

[racebronco2]

Below is a quote from me in another thread "http://www.svtperformance.com/forums/open-track-racing-203/833681-some-data-when-open-tracking-whipple-14psi.html"I went to another track this weekend and the ait2's went as high as 170* again. I installed the 3.50 pulley for about 12psi and the ait2's never went over 140*. Only a couple of degrees of timing was being pulled compared to 5* timing at 170*.

I installed a bigger inter-cooler pump since the last track event. Ambient was about the same but my iat2's were only 150* so it seems like the pump and the dual heat exchangers are doing their job.

Compare this to a kenne bell 01 cobra at 6psi. Engine temps were 245* and ait2's were 140*.

 

[98 Saleen Cobra]

Damn.. I just got my C&R installed today.. That thing is crazy with cooling so far in this AL heat..

 

[N/Angel]

Damn.. I just got my C&R installed today.. That thing is crazy with cooling so far in this AL heat..

which C&R did you get? the GT500 unit?

 

[98 Saleen Cobra]

Yup

 

[Blkkbgt]

C&r?

 

[98 Saleen Cobra]

Yes a C&R heat exchanger from a GT500.

 

[Blkkbgt]

Didnt know they made one for the GT500. Do you have any pics of the install? Do you have any data logs to compare the new C&R to your old setup?

 

[98 Saleen Cobra]

It's in the works with Van at Revan Racing. I have no data logs but in 85 degree humid heat 3 back to back WOT pulls, and about 8 red lights I pulled into the drive way with zero cool down and the water was 65 degrees in the cooler!!

Compared to my previous setup just cruising on the freeway for 30 mins 45 min cool down the water was so hot it burned my hand.. Probably in and around 180 degrees or so. My shit was heatsoaked so bad from just cruising..

Keep in mind I have Vortech T-trim with a A/W aftercooler so it's not a 04 Cobra setup.

 

[racebronco2]

It's in the works with Van at Revan Racing. I have no data logs but in 85 degree humid heat 3 back to back WOT pulls, and about 8 red lights I pulled into the drive way with zero cool down and the water was 65 degrees in the cooler!!

Compared to my previous setup just cruising on the freeway for 30 mins 45 min cool down the water was so hot it burned my hand.. Probably in and around 180 degrees or so. My shit was heatsoaked so bad from just cruising..

Keep in mind I have Vortech T-trim with a A/W aftercooler so it's not a 04 Cobra setup.

Please don't take this the wrong way:-D but next time get us some datalogs with cold hard facts. Your cool down was before and after each red light. Did you have some sort of gauge to see that it was at 65*? I would like to see any cooling system that uses only the ambient air temps that cools the fluid 20 degrees colder then ambient temps. Any cooling system that works that well i would by in a second.

All air to liquid coolers are basically the same. The greater the difference in temps the more heat can be removed and cooled. If the temps are not that great then very little heat can be removed. If the intercooler temps are cooler then the ambient temps then the ambient temps will warm-up the water til it stabilizes above ambient temps.

My car is 80 degree weather the ait2's were 118* cruising on the feeeway. Once i get into traffic and redlights it will go up about 10-15 degrees but once up to speed the temps start to lower again.

I have temp sensors on the inlet and the outlet of the heat exchangers. On track i did have a chance to check the temps going in and out a couple of times. When the ait2's were at 150* the inlet temps into the intercooler were 250* and the outlet was at 165*. So the dual heat exchangers are pulling out 85* degrees with very little increase in engine temps which were running 202*-206* most of the time.

 

[N/Angel]

Yup

cool, that's the one I'm going to get if I ever think I need better cooling, up to now the Gords unit is working great for me but I'm going to be upping the boost soon with a new Eaton :banana: