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[ZR1] Huge thanks to GKZR1 for amazing cooling improvements
C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
Since you asked...
This was a long cruising log that I took on the way to work (one of many) when I had your kit on. Here is a pretty cool day (mid 70's) and my IAT 2's hovering around 113. For comparison, my IAT2's are 113 when it's in the mid 90's with my new setup. This log was 30 minutes long and was at highway speeds (60 MPH) taken last September after the kit was initially installed at RKT performance. Rick at RKT bent over backwards calling you and making sure the kit was installed correctly and that the system had no air pockets. It was all flowing correctly. Since then, I also had another shop go over the entire setup completely and found no issue with the install or components on the car. Regardless, it still was not delivering the performance I needed from a 3k+ price tag.
On a day like today when it was mid 70's I saw 85-87 degree IAT2. Not 113. That's a 20+ degree difference.
Originally Posted by D3PE
Curious to see data from both setups. We've got cars that used to see 180 or more with cam/bolt-ons, now with our system and fully built with an iron block keeping around 125-135 on a 160mph+ pull. The added capacity of your large trunk tank plays a helping part for sure, but I can't see it being 20-30 degrees improvement
Last edited by WeaponsGradeTorque; 09-16-2016 at 01:43 AM.
It has a slightly higher BTU heat transfer rating and the inlet/outlet on it are placed in position for a much better water flow path than something like the magnuson heat exchanger. Surface area is about the same but the core is a tad thicker as well.
Ah man time to upgrade again lol bought the magnuson last year when you recommend it.
I am in no way trying to start an argument with this post. But I do believe you must have had something wrong with your D3PE kit. Here is some log info from mine.
This log was taken in about 70 degree weather like you mentioned having 110+deg cruising temps.
As you can see here before the pull I have 28 degree inlet temps, that is 82.4 degrees Fahrenheit at 63mph.
And now of course you can see where I let off at 162mph. My inlet temp is 48 degrees which is 118 degrees Fahrenheit. Which is lower than D3PE posted earlier. They were going off the numbers I told them when I didn't have access to my logs so I just guessed because I couldn't remember exactly.
Here is the peak IAT2 you see just after I let off before it starts to recover. 51C which is 124F.
And then just 1 minute later temps are back down to 39C which is 102F. And you can see it is still dropping pretty consistently after that so you have good temps when you go to do another pull.
Also I would like to mention although BallBearing had the same issue as you, the owner after him did get it fixed, I believe the issue was air bubbles and they had to add a breather somewhere, not sure why they had issues with that and others don't but that was the fix for him. Either way glad to see you have a working setup now, and I am sorry to see the D3PE setup didn't work for you like it does for me. I am very happy with mine!
You do realize the OP posted saying the 70* weather with 113 IAT2s was with the D3 kit and the new kit it was in the 90s and he still held 113 IAT2s.
His log was mid day and yours is at 10:57pm to 12:24am so I would assume he had higher IAT1 vs yours automatically. Also at that point things like engine temp should be factored in and his would be higher during mid day.
You do realize the OP posted saying the 70* weather with 113 IAT2s was with the D3 kit and the new kit it was in the 90s and he still held 113 IAT2s.
His log was mid day and yours is at 10:57pm to 12:24am so I would assume he had higher IAT1 vs yours automatically. Also at that point things like engine temp should be factored in and his would be higher during mid day.
Yes, I was commenting on the fact that his iat2 was 113 degrees while driving around in 70 degree weather with the D3PE kit. Mine in the same weather was about 10 degrees over ambient which it almost always is while cruising.
Also those times you're reading are time from the beginning of the log not the actual time of day... ProEFI does not log the time of day and neither does hptuners as far as I know. Look at my coolant temp, it is right there. I am not on my pc so I can't see it clearly but I belive it is 88C after the pull which is 190F. Which is normal with my D3PE fan setup. I have to beat on it pretty hard to get over 200. Edit: Just went back and seen his coolant temp was also 190 degrees so it is a good comparison.
Last edited by SquirrelyNutz; 09-19-2016 at 01:26 PM.
Yes, I was commenting on the fact that his iat2 was 113 degrees while driving around in 70 degree weather with the D3PE kit. Mine in the same weather was about 10 degrees over ambient which it almost always is while cruising.
Also those times you're reading are time from the beginning of the log not the actual time of day... ProEFI does not log the time of day and neither does hptuners as far as I know. Look at my coolant temp, it is right there. I am not on my pc so I can't see it clearly but I belive it is 88C after the pull which is 190F. Which is normal with my D3PE fan setup. I have to beat on it pretty hard to get over 200. Edit: Just went back and seen his coolant temp was also 190 degrees so it is a good comparison.
My bad thought it showed time of day not log length. Its monday so I am using that as my excuse. His shows time of day at the bottom.
FWIW, I too had a very tough time bleeding my D3 kit, however once that was worked out it's been great. Typical drive in our miserable S. Fla heat (92-95*F) usually results in ~10F difference IAT vs. IAT2 in city driving, ~7-8*F on the highway. Really sounds like you had air trapped in the system, same problem I had with my old Fasterprom system.
It has a slightly higher BTU heat transfer rating and the inlet/outlet on it are placed in position for a much better water flow path than something like the magnuson heat exchanger. Surface area is about the same but the core is a tad thicker as well.
Magnusson unit is less than ideal for flow path inlet/outlet. I quite frankly dont recommand magnusson H/X core at all! Greg got it all right!!
I had to do all kind of bend smoothing while trying to install the magusson H/X right. Its 2 bottom inlet/outlet which sucks. If they were side ways it will be a whole different story!
Magnusson unit is less than ideal for flow path inlet/outlet. I quite frankly dont recommand magnusson H/X core at all! Greg got it all right!!
I had to do all kind of bend smoothing while trying to install the magusson H/X right. Its 2 bottom inlet/outlet which sucks. If they were side ways it will be a whole different story!
IATs on my boost only Wannagofast 179mph pass. Ambient was in the mid 60s. No ice.
(sidenote: the end of the pull is actually 180mph. The logging software maxed at 158mph as you can see where the green line goes flat.)
Wouldn't it be better to connect the reservoir outlet on the drivers side, to the upper heat exchanger inlet and then connect the pump inlet to the lower heat exchanger fitting? Wouldn't this yield a better flow in the heat exchanger?
Wouldn't it be better to connect the reservoir outlet on the drivers side, to the upper heat exchanger inlet and then connect the pump inlet to the lower heat exchanger fitting? Wouldn't this yield a better flow in the heat exchanger?
I'm not following you on that thought terry. There is no reservoir upfront. Just a heat exchanger. The pump and reservoir are in the back.
I'm not following you on that thought terry. There is no reservoir upfront. Just a heat exchanger. The pump and reservoir are in the back.
OK, I understand that you've eliminated the front reservoir. For my street application, I'll be keeping mine and perhaps place an additional reservoir up front along with a Edelbrock HX.
OK, I understand that you've eliminated the front reservoir. For my street application, I'll be keeping mine and perhaps place an additional reservoir up front along with a Edelbrock HX.
09-16-2016, 01:23 AM
