I use my 02 Z06 primarily for the track and it runs hotter than I would like so I replaced the radiator with one from Trackspec. They provide parts for the Spec Corvette series and I assumed that the radiator would provide better cooling. The core is 2 1/2 " vs 1" for the factory core. When I refilled the system I had to add a little over 1 extra gallon to the system to fill the larger core. I retained the factory 196 F thermostat. I got the radiator with the internal engine oil cooler and I will actually be running the power steering fluid through it. Fittings for the internal cooler are 8AN

Install was very simple but did require a little trimming of the fan shroud especially in the area where the internal cooler fittings are. When we put it in we actually mounted the fans to the radiator and dropped the whole thing in as one. It worked perfect with a helper and prevented bending any fins on the radiator. I have yet to be able to put much of a load on it due to the Corona Virus and tracks being shut down but I have time next weekend at VIR and then again the 1st & 2nd of June so we should get a pretty good read at that time. People at Trackspec were good to deal with and answered the few questions I had quickly.

 

I'm interested in your results. I'm looking to upgrade to the Trackspec radiator with integrated oil cooler, for the occasional track day. If I may ask, why the decision to run the powersteering thru the integrated oil cooler, instead of running the engine oil thru the integrated oil cooler and just running the P/S thru our factory P/S cooler?

 

The factory PS fluid cooler would not keep up so I ran the ps fluid in the radiator and that problem was solved. I use a separate engine oil cooler from Improved Racing and it work well too.

 

Were you able to install the oil adapter plate and lines without having to remove the headers? I'm planning my install this week.

 

Car does not have headers. I am trying to stay around the Sec Corvette guidelines...

 

I finished my install successfully this weekend. Some notes from the product: I was very impressed with the quality of the AN lines and fittings, as well as the radiator welds and overall robustness of the radiator. It's a massive radiator. Also the oil cooler adapter is of high quality and it's actually from Improved Racing, and it's the non-thermostatic version. The kit also brought new mounting bolts for the oil cooler adaptor, all the AN fittings, a new oil temperature sensor with extended pigtail (you're going to need it), gasket plate, and Allen key. The packaging for the radiator was also A+. It came very well protected and all fins were intact upon arrival. The ONLY thing lacking I'd say are a good set of instructions, or just instructions in general since there weren't any provided. Luckily, the folks at Trackspec are easy to reach and pointed me in the right direction fairly easily before the install.

FYI for anyone else that gets the Trackspec Radiator with integrated oil cooler and has long tube headers, depending on the long tube headers (mine are TSP 1-3/4) it is actually possible to install the oil cooler adapter without taking the driver side header off. I said POSSIBLE, but not recommended. I was able to install the fittings and tighten the lines to the oil cooler adapter first, and then run the lines forward from where the oil filter is and snake them thru all the way towards where it would connect to the radiator. Once the oil adapter plate was in position, it was really tricky to thread in the mounting bolts because you're fighting the lines while trying to align the bolt threads into the hole. Another IMPORTANT note: I had to remove a ground wire and re-run it behind the AN lines to avoid the lines tugging on the wire. This wire I'm talking about is like a copper mesh wire, and connects to the driverside strut mount on the top (in front of the brake master cylinder). In my particular case, I found the pre-fabricated AN lines to be slightly long, but I was able to snake them thru and avoid kinks. I found the best route for the bottom AN hose was to loop it under the sway bar and then back up to connect it to the radiator. I also HIGHLY RECOMMEND to coat the O-rings of the fittings with silicone grease and also grease the threads a bit to avoid chewing up the aluminum threads. I wish I would've taken pictures of the install, but I was on a time crunch with an hourly rented lift/garage so I didn't take much pics. The install all in all went successful despite the painful part of routing the AN lines and installing the oil adapter plate, and I had no leaks. It took a total of 7 qts of oil just to get to the "low oil line" on the dipstick, so you're going to probably end up with 8qts to get to "full line". I ended up putting 8qts of oil. That is with a fresh oil filter too.

So far, I've noticed about 15-20 degrees difference in coolant temp (from about 190F to 170F for example) for normal cruising conditions and about 10-15, sometimes even 20 degrees difference on oil temp (from about 207F-205F to 185-195F). I believe my drop in temperature is not huge because I was already running somewhat cool for cruising conditions with my 160F Tstat and lowered "FAN ON" settings. Oil comes up to temp pretty quickly which is nice for daily duties. I've found no significant change in oil pressure, just slightly higher pressures (about 5-7PSI) on lower RPM's but I think it's mostly due to a decrease in oil temp which means higher oil viscosity therefore higher pressures. I'll report back my on-track results when I come back from the HPDE event on October 10th.

 

Thought I’d post my results after my recent HPDE with the Trackspec Radiator. Oil temps hovered around 250F for the entirety of the 20 min sessions, and maintained 40+ oil PSI. I never had to short shift once, kept shifting at or over 6500RPM. Super happy with it. This was with the Radiator WITH integrated oil cooler, running 5W-30. I also ran 50/50 dexcool but replaced a gallon of 50/50 for distilled water. I also used the big radiator shroud, and deleted the fog light housings covers for extra air intake to engine. Ambient temps were between 80-88F thru the afternoon and evening. I ran 4 20min sessions. My engine power is about 520-530 crank.

 

Always good to read a review with qualitative results. Thanks!
Two questions, if I may:
Single row of big tubes, multiple rows of smaller?
Do we know where it’s made?

 

I think it’s dual core, just slightly thicker than the Dewitts. It’s made in USA. The drain valve is super handy too btw. Way better than the stock plastic petcock valve.

 

Thanks for the results. Looking into a radiator addition for winter project. Do you have a before temp. on track for the oil? My Z06 is at 250 with the stock radiator, stock engine on track. Thanks.

 

Very dependent on track, driver, engine power, ambient temp...etc. But oil temp I saw 280,290, even 295 before being forced to do a cool down lap to avoid blowing up my engine. That was with even less power at the wheels (before CNC high comp heads and FAST92 intake). Now it plateaus at around 250F at the track.