Congratulations to Patrick Chio for his 2nd place finish in the Modified RWD class in Round 6 of the 2013 Redline Time Attack race! He has been a top contender in this series with 1st/2nd place finishes. Recently he added a Vortech supercharger and this compounded the 350z’s high oil temp issues under hot race conditions. Read Patrick’s report and how Z Car Garage helped tune his 350 to survive the blistering temperatures and demands of the Auto Club Speedway:

Due to a City Tech Auto Body track day at Mazda Raceway Laguna Seca we missed the practice day on Saturday. Arriving on Sunday early morning we completed the check up, tech, registration and temperature was rising to 77 degrees right before our first session.

Auto Club Speedway is known to put a lot of stress on the motor because of the NASCAR banking at high speed. Our Z hit 5th gear, full throttle, 6k+ rpm on the bank over 140mph. During the first time attack session, our Z was able to keep the oil temperature just about 200F through out the whole session at around 82 degree ambient temperature. However, during the 2nd session ambient temperature rose up to 100F+. We saw many M3, STi and highly modified cars forced to pit after the 2nd lap. Despite the high heat, we managed to finish the full session and oil temperature reached 260F right before the checker flag.

We were amazed that a supercharged 350z was able to last the full session in this harsh environment. Rob and his crew at Z Car Garage have done an amazing job again keeping our time attack Z alive! Below is the video in one of the session (Count how many super cars we have passed):

 

Keep up the superb driving Patrick and thank you for letting ZCG work on your Time Attack Z!

 

We’ve known Patrick for a long time and when he is not running City Tech Auto Body he is out on the track his Time-Attack prepped Porsche orange 350z. Patrick was running an NA motor then made the jump to forced induction via the Vortech supercharger. He installed the kit himself and visited ZCG for tuning and advice on how to keep the VQ cool during blazingly hot track days ie. Buttonwillow Raceway. Here is an update from Patrick from Round #5 of the Redline Time Attack:

As some of you might know, our Z Car Garage and CityTech Auto Body Sponsored 350z has been through a lot of struggling with overheating problems after we installed the a Vortech Supercharged Kit. We have spent tons of time and testing to make it cool down. Our goal is to make it last through the whole 20mins session without worrying about overheating with full power.

07/20/2013 Saturday: The first practice day of the Redline Time Attack event was at 102F, a perfect day to put a ultimate heat test to our new setup. Compared to our last event which the Z lasted only 2 laps before overheating, we installed a 2nd oil cooler, running 50/50 Methanol water injection and de-tuned. Also, Rob suggested that to remove the aftermarket electric fans and put back the stock fan with shrouds. With all the help from our crew and Z Car Garage, we double checked all the fluid levels are full, adjusted tire pressure and started our first 20mins session. The Z felt great with the supercharged power on the first lap, pulling on every gears to the redline. But will it last full 20 mins without a drop of power? 4th lap passed by, our Nitto NT-01 tires started to get greasy due to the heat, but Oil temperature still stayed at 230F, intake and water temp stay cool without a sign of overheating, no power dropped. We are so amazed because our last event only last 1 ½ lap before oil temp reached 290F. We managed finished with the best lap time of 1’58.8 running CW13 configuration.

07/21/2013 Sunday: This was a much hotter day at 107F. In our first qualify session, everyone was running slower time than yesterday. We managed to qualify at the lap time of 1’59.5 which placed us third in our class. All other vehicles in our class were full race gutted car and our Z still have the full dash, door and windows in place. During the race session, temperature got worse which rose up to 108F. Despite the burning sun and air, the Z’s water and oil temp were both stayed cool and no overheating throughout the entire race session, however, the tires were giving up after the 2nd lap from the heat. We couldn’t get any better time than the qualifying session due to the hot temperature and traffic on the track and ended up the time 2’00.391. We ended up third place in modified RWD Class.

Special shout out to Z Car garage crews for their awesome work keeping the Z at operating temperature while making great power in this extreme operating environment.

The next event will be at AutoClub Speedway, Fontana on Sep 15, 2013. We will be doing some more modifications and possibly installing a full roll cage on the Z. We will keep you guys updated.