I take it an oil cooler didn't solve overheating?
#1
Le Mans Master
Thread Starter
I take it an oil cooler didn't solve overheating?
Somewhere, someone along the way must have tried a dedicated, separate oil cooler for our cars, right? I'm aware of the aux cooler added to the M7 models, but don't actually know if it removes the water-oil exchanger or not (I assume not).
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
Last edited by davepl; 05-28-2017 at 12:51 PM.
Popular Reply
05-29-2017, 07:17 PM
Former Vendor
In addition, I am working on a new kit that will package two air/oil heat exchangers in the same area as the A8 or GMPP add on cooler. One cooler for ATF and one for Engine Oil. This design will allow Z06/A8 cars to completely remove the engine oil heat by eliminating the brick cooler and exhausting this heat below the car. The connections for the A8 ATF will be the identical size and location as the factory for plug and play installation.
We may expand this offering with a M7 version, with the 1st section used as an EOC and the 2nd second used for an "add on coolant" heat exchanger.
In both cases the horizontal mounted H.E. is upgraded from 26mm to 46mm thick. Minor plastic trimming will be required to allow for this increase in thickness. I expect to release this design sometime in July so it will be just in time for those hot summer days.
#2
Melting Slicks
Somewhere, someone along the way must have tried a dedicated, separate oil cooler for our cars, right? I'm aware of the aux cooler added to the M7 models, but don't actually know if it removes the water-oil exchanger or not (I assume not).
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
There is now a temperature controlled bypass that opens up at 177dF iirc that replaces the 'brick''; why this hasn't been paired with a dedicated setrab etc. oil cooler surprises me, although getting airflow to a dedicated oil cooler remains a challenge.
Bish
#3
Amat Victoria Curam
Somewhere, someone along the way must have tried a dedicated, separate oil cooler for our cars, right? I'm aware of the aux cooler added to the M7 models, but don't actually know if it removes the water-oil exchanger or not (I assume not).
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
The only way to bleed off all the heat involves opening the car's nose to additional radiators.
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davepl (05-28-2017)
#4
Supporting Vendor
Somewhere, someone along the way must have tried a dedicated, separate oil cooler for our cars, right? I'm aware of the aux cooler added to the M7 models, but don't actually know if it removes the water-oil exchanger or not (I assume not).
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
You'd imagine that if you could find airflow for it, removing the entire engine oil heat load from the coolant (since it's just in the little block-mounted exchanger from the factory) should take a LOT of load off the cooling system, especially once oil temp gets >250.
What was the result though? Too hard to fit, so no one ran a test that way, or didn't make enough of a difference when it WAS tested?
The aux cooler is just a secondary radiator and still uses coolant to cool the oil.
We are working with DeWitts to finish up an oil cooler kit for the C7 using our thermostatic oil cooler adapter and their cooler. It should be available both from us or DeWitts.
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thebishman (05-28-2017)
#5
When GM created the overheating problem with their second generation Duramax diesel a number of owners (and firms) tried to solve it with a large oil cooler. The Dmax also uses a oil to coolant exchanger. But the additional cooler helped very little and the only approach that worked was a large secondary radiator. Unlike the C7 there was plenty of room and airflow for the pickup but it is a history repeats itself moment when once again a platform had been released with insufficient cooling capacity for its rated (and highly advertised) capabilities.
#6
Le Mans Master
Thread Starter
Dewitts makes a dedicated outboard oil cooler to go along with their radiator and intercooler upgrades. When tested as a package, it made a "significant" difference, but still unable to dissipate *all* the heat generated. Search for the very informative thread from GSpeed.
The only way to bleed off all the heat involves opening the car's nose to additional radiators.
The only way to bleed off all the heat involves opening the car's nose to additional radiators.
#7
Le Mans Master
https://www.corvetteforum.com/forums...ooler-kit.html
http://store.katechengines.com/mobil...-kit-p551.aspx
http://store.katechengines.com/mobil...-kit-p551.aspx
Last edited by johnglenntwo; 05-28-2017 at 03:44 PM.
#8
Supporting Vendor
When you remove the oil cooler from the cooling system, and you're able to keep the oil temps below 275, the net cooling gain is roughly 15-20*.
If you leave the oil cooler in the cooling system, you are adding that heat load into the cooling system, which cannot work hard enough to keep coolant temps in check, even with added radiators. We ran the OEM oil cooler and with the stage 2 system we offer (70mm dewitts, and 50% secondary radiator) and coolant temps were reaching 240, with oil temps over 300.
Please see post 164 of our cooling thread from 1 year ago, last summer:
https://www.corvetteforum.com/forums...post1592637335
If you leave the oil cooler in the cooling system, you are adding that heat load into the cooling system, which cannot work hard enough to keep coolant temps in check, even with added radiators. We ran the OEM oil cooler and with the stage 2 system we offer (70mm dewitts, and 50% secondary radiator) and coolant temps were reaching 240, with oil temps over 300.
Please see post 164 of our cooling thread from 1 year ago, last summer:
https://www.corvetteforum.com/forums...post1592637335
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GSpeed C7Z Cooling Development
2014 NASA Texas TT1 Champion
2015 NASA Texas ST1 Champion
2018 NASA TTU & TT3 National Champions
2019 NASA ST2 National Champion
2019 NASA Texas TT2 Champion
2020 SCCA Majors COTA GT2 pole sitter
2020 SCCA Trans Am Road Atlanta SGT Winner
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#9
Le Mans Master
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#10
Supporting Vendor
It's best to increase coolant capacity of the radiator by upgrading it and adding secondary radiators while also removing the burden of oil cooling from it by running a separate air-to-oil cooler.
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thebishman (05-30-2017)
#12
Former Vendor
In addition, I am working on a new kit that will package two air/oil heat exchangers in the same area as the A8 or GMPP add on cooler. One cooler for ATF and one for Engine Oil. This design will allow Z06/A8 cars to completely remove the engine oil heat by eliminating the brick cooler and exhausting this heat below the car. The connections for the A8 ATF will be the identical size and location as the factory for plug and play installation.
We may expand this offering with a M7 version, with the 1st section used as an EOC and the 2nd second used for an "add on coolant" heat exchanger.
In both cases the horizontal mounted H.E. is upgraded from 26mm to 46mm thick. Minor plastic trimming will be required to allow for this increase in thickness. I expect to release this design sometime in July so it will be just in time for those hot summer days.
Last edited by Tom@Dewitt; 05-29-2017 at 07:28 PM.
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#13
Le Mans Master
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#14
Le Mans Master
Thanks!
We are really excited to team up with IR with our cooling components. Some customers that race and drive their cars in the north have said the oil cooler works a little too well and the addition of a IR adapter would fix that.
In addition, I am working on a new kit that will package two air/oil heat exchangers in the same area as the A8 or GMPP add on cooler. One cooler for ATF and one for Engine Oil. This design will allow Z06/A8 cars to completely remove the engine oil heat by eliminating the brick cooler and exhausting this heat below the car. The connections for the A8 ATF will be the identical size and location as the factory for plug and play installation.
We may expand this offering with a M7 version, with the 1st section used as an EOC and the 2nd second used for an "add on coolant" heat exchanger.
In both cases the horizontal mounted H.E. is upgraded from 26mm to 46mm thick. Minor plastic trimming will be required to allow for this increase in thickness. I expect to release this design sometime in July so it will be just in time for those hot summer days.
In addition, I am working on a new kit that will package two air/oil heat exchangers in the same area as the A8 or GMPP add on cooler. One cooler for ATF and one for Engine Oil. This design will allow Z06/A8 cars to completely remove the engine oil heat by eliminating the brick cooler and exhausting this heat below the car. The connections for the A8 ATF will be the identical size and location as the factory for plug and play installation.
We may expand this offering with a M7 version, with the 1st section used as an EOC and the 2nd second used for an "add on coolant" heat exchanger.
In both cases the horizontal mounted H.E. is upgraded from 26mm to 46mm thick. Minor plastic trimming will be required to allow for this increase in thickness. I expect to release this design sometime in July so it will be just in time for those hot summer days.
#15
Le Mans Master
Lets see!? ;)
1.) The new air stream outs the back. But, that air stream is HOT!
And like the vender said it's omitted by the move, most significantly!
But, yes - where's the data!?
Last edited by johnglenntwo; 05-29-2017 at 08:23 PM.
#16
Supporting Vendor
we use/sell the prospeed oil cooler kit on our c7z customers and c7 customers that road race. works wonders and fits amazing.
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Cordes Performance Racing aka "CPR"
Owner of AZ's premier LSX/LTX motorsports shop
http://cordesperformanceracing.com/
www.facebook.com/cordesperformanceracing.com
joe@cordesperformanceracing.com
480-359-5914
#19
Former Vendor
We wanted to create a package that :
1. Removed the Engine oil heat from the coolant (Delete Brick)
2. Exhaust the above heat without going through the HX or radiator
3. Did not require removing or altering the front fascia
4. Use the same factory lines for TOC (A8)
5. Mount in existing A8 TOC bolt pattern (Or GMPP)
6. Affordable pricing
I feel this new system accomplishes all the above requirements.
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#20
Burning Brakes
Joe, that is a nice system. It takes the engine oil heat off the coolant system and exhausts it out through the wheel well and that was part (#1 and #2) of the criteria behind our new design.
We wanted to create a package that :
1. Removed the Engine oil heat from the coolant (Delete Brick)
2. Exhaust the above heat without going through the HX or radiator
3. Did not require removing or altering the front fascia
4. Use the same factory lines for TOC (A8)
5. Mount in existing A8 TOC bolt pattern (Or GMPP)
6. Affordable pricing
I feel this new system accomplishes all the above requirements.
We wanted to create a package that :
1. Removed the Engine oil heat from the coolant (Delete Brick)
2. Exhaust the above heat without going through the HX or radiator
3. Did not require removing or altering the front fascia
4. Use the same factory lines for TOC (A8)
5. Mount in existing A8 TOC bolt pattern (Or GMPP)
6. Affordable pricing
I feel this new system accomplishes all the above requirements.