Nikw91
Senior Member
At least they did the right thing and paid for shipping/replacement.
Still time/labor and coolant isn’t the cheapest.
Hopefully this is just an anomaly.
Did you notice any temperature changes between the radiators?
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Still time/labor and coolant isn’t the cheapest.
Hopefully this is just an anomaly.
Did you notice any temperature changes between the radiators?
CG13
Member
- Thread starter
- #17
I wouldn’t say PWR products are lacking in quality based upon one report of failure. My intercooler and track spec radiator are working fine without issue.
I could not find any information on other Civic owners with PWR issues.
If I have any further issues I’ll certainly update but I don’t expect to.
CG13
Member
- Thread starter
- #18
Agreed on the wasted money and time. I’m going to accept this is part of tracking cars unfortunately.
I do notice a difference in temperatures between the OEM, the PWR track spec, and the PWR WOT triple pass spec radiators.
I’ve run all three with HEL oil cooler. I’ve run the track spec and WOT spec with the cooling under-tray.
OEM radiator - I could not complete a 20 minute session without overheating. I had to slow down and run cool-down laps. Those who can complete 20 minute track sessions are not pushing the car or they’re accepting high temps. It is not designed with enough cooling capacity at track pace.
PWR track spec - I can complete 20 minute sessions, depending on the track layout, ambient temps, and how hard I’m pushing on each lap. At Hedge Hollow I had no cooling issues. At I29, today I ran 6 sessions and on three of them I had to run cool-down laps in the middle of the sessions, which was fine because it helped with the garbage PS4S tires I’m running. The difference in these three sessions was that I was pushing hard every lap.
PWR WOT track spec radiator - I’ve only run three track days with this radiator before it failed. I had no temperature issues when running it, but temps were: mid-60s, mid-70s, and mid-70s.
I’ll know more later in the summer with the PWR WOT radiator to compare to the track spec. Both are miles ahead of the OEM setup.
CG13
Member
- Thread starter
- #19
06/26 update
06/26/26 Track Day at I29 Speedway
We ran a private track day with 10 people today. I spent a lot of time driving and riding in other cars. I put in 31 hot laps and another handful of cool-down laps that I didn't log.
I was only able to run 91 octane and my 91 fuel map so I was down on speed on the straight and I lost significant top speed (4.5 MPH) compared to last weekend. My best time today was a 1:46 lap, and that was disappointing. The PS4S tires have 99 laps over three track days and 16 sessions. I've rotated front to back and side to side to try to manage them. I'm still seeing really early delamination on the edges (both inside and outside, depending on the track's layout).
I'm going to switch to Hoosier Track Attack Pro or Nankang CR-S V2 next. While cheap, the PS4S aren't particularly enjoyable to drive and I constantly have to worry about overheating them.
Cars present today:
FL5 (me)
Heavily modified Viper, ACR+ level
GT350R
95 Cobra R
C8 (supercharged)
Mini
X5 M Competition (yes, the SUV)
GR86
991.2 Carrera
Fastest lap went to the GT350R, by a few tenths over the C8. both about a second faster than me. GT350R on Cup 2 tires, C8 on Track Attack Pro.
Most enjoyable lap for me was driving the 95 Cobra R on Cup 2 tires. It's not too powerful and it has all the suspension and chassis flex with the tire grip. It's not fast but it is fun.
Scariest car to drive and ride in was the Viper. I only drove six laps but I could not get comfortable with the horrible seating position, pedal offset, pedal spacing, and the very challenging short-throw shifter. I could not manage to do a 4-3 downshift without screwing up my braking. The car is extremely capable but I would need time to practice. As a passenger it felt sketchy.
Equipment issues on the day:
The C8 recently had a warranty repair done for an oil leak from the dry sump tank. It didn't make it through a track day without the issue repeating itself. Back to the dealer it goes.
The Viper had a blown front tire, cause undetermined.
The GT350R destroyed a set of Cup 2 front tires in one track day. Time for camber adjustments and/or a different tire.
06/26/26 Track Day at I29 Speedway
We ran a private track day with 10 people today. I spent a lot of time driving and riding in other cars. I put in 31 hot laps and another handful of cool-down laps that I didn't log.
I was only able to run 91 octane and my 91 fuel map so I was down on speed on the straight and I lost significant top speed (4.5 MPH) compared to last weekend. My best time today was a 1:46 lap, and that was disappointing. The PS4S tires have 99 laps over three track days and 16 sessions. I've rotated front to back and side to side to try to manage them. I'm still seeing really early delamination on the edges (both inside and outside, depending on the track's layout).
I'm going to switch to Hoosier Track Attack Pro or Nankang CR-S V2 next. While cheap, the PS4S aren't particularly enjoyable to drive and I constantly have to worry about overheating them.
Cars present today:
FL5 (me)
Heavily modified Viper, ACR+ level
GT350R
95 Cobra R
C8 (supercharged)
Mini
X5 M Competition (yes, the SUV)
GR86
991.2 Carrera
Fastest lap went to the GT350R, by a few tenths over the C8. both about a second faster than me. GT350R on Cup 2 tires, C8 on Track Attack Pro.
Most enjoyable lap for me was driving the 95 Cobra R on Cup 2 tires. It's not too powerful and it has all the suspension and chassis flex with the tire grip. It's not fast but it is fun.
Scariest car to drive and ride in was the Viper. I only drove six laps but I could not get comfortable with the horrible seating position, pedal offset, pedal spacing, and the very challenging short-throw shifter. I could not manage to do a 4-3 downshift without screwing up my braking. The car is extremely capable but I would need time to practice. As a passenger it felt sketchy.
Equipment issues on the day:
The C8 recently had a warranty repair done for an oil leak from the dry sump tank. It didn't make it through a track day without the issue repeating itself. Back to the dealer it goes.
The Viper had a blown front tire, cause undetermined.
The GT350R destroyed a set of Cup 2 front tires in one track day. Time for camber adjustments and/or a different tire.
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