Mr Paddle.Shift
08-27-2005, 09:31 PM
"You're crazy!"
"You're an addict!"
With such compliments about me tracking my car, how can I not resist taking the car to another event? 3 events in a month. That's about 1 track event per 10 days.
First off, I have a camcorder this time. But still learning the features. So some of the clips might seem a bit washed out. Next time I will promise better quality.
Small collage clip of the last session. (http://home.comcast.net/~csl.parts/Buttonwillow_0826/Buttonwillow_last.WMV)
Following a STi. (http://home.comcast.net/~csl.parts/Buttonwillow_0826/Buttonwillow_STi.WMV)
Secondly, an interesting mod with data to back up. For those who have followed one of my previous reports, I have an intercooler water spray system which I put together. The original intention was to spray the old ASA intercooler. Since my Alpina bumper opening is quite restricted, I needed to cool the top part of the IC. It worked well on the tracks. Since having the new Technik Engineering IC, the IC spray has proved to be less than functional, producing very minimal results. Reason is simple. The TE IC is wider and lower, which in fact is a nice pair-up with my bumper. This being the case, just a couple of days before the event, I decided to re-design, re-route and re-direct the spray nozzles at the oil cooler instead. Don't take this the wrong way. The oil cooler works wonder as is. But with 40~45C (104 ~113F) on the tracks, I figure additional cooling won't hurt.
Here are the nozzles pointing at the oil cooler.
<img src="http://home.comcast.net/~csl.parts/Buttonwillow_0826/oc_spray.jpg">
Now, you must be thinking: "3 small nozzles and what can they do?". It's all about doing the engineering math, choosing the right nozzles and pressure.
Here's the graph.
<img src="http://home.comcast.net/~csl.parts/Buttonwillow_0826/oc_spray_data.jpg">
"Oil X" means oil temperature for session X. Similar notation for "IAT X". Oil and IAT from the same session have the same line colors. The percentage next to "Oil X" presents whether the spray was used. 100% means the system is armed and will spray when boost is above 0.10kgf/cm^2. There is a 40% in Session 3. The reason is almost half way through the session, I ran out of water in the tank. Session 4 is 40% as well, cos I only have 0.2gal of distilled water left. So I had to disarmed the system half way through. 0% means system not armed and not used.
Towards end of the day, it was so hot that I pitted earlier. So the data logging is shorter.
This is getting REALLY technical. Be prepared.
So what do we observe here from the graph? Oil temp from Session 2 never exceeds 130C with and average IAT of about 35C. This is also the session when the spray system was used throughout the session. One might argue that the day wasn't that hot to begin with. IAT of 35C was measured at air in motion.
Session 3 is interesting. As mentioned, I dis-armed the spray almost half way through the session and you can see the oil temp rising from 901 on.
Session 4 (after refilling the tank with 0.2 gal) shares similar oil temp profile. But soon the water ran out and I decided to pit.
Now, Session 5 is totally without using the spray. Note also that IAT 3, 4 and 4 were similar. I drove the car as just hard and without the spray, see how the initial oil temp profile in Session 5 rises. It peaks as high as the non-sprayed section in Session 3 as indicated by the black arrows. I pitted early and called it a day.
========================================
Other things to mention:
1. After fixing the hose (as per this saga (http://forum.e46fanatics.com/showthread.php?t=284800)), it never popped off again. Everything is working as intended.
2. I upgraded the brake caliper guide sleeves from OEM rubber to solid brass. Braking feel is better. The upgrade is more significant if you track your car. <img src="http://home.comcast.net/~alpina.nut/solid_caliper.jpg">
========================================
My next report will be end of Sept. Until then, drive safe! :thumbup:
"You're an addict!"
With such compliments about me tracking my car, how can I not resist taking the car to another event? 3 events in a month. That's about 1 track event per 10 days.
First off, I have a camcorder this time. But still learning the features. So some of the clips might seem a bit washed out. Next time I will promise better quality.
Small collage clip of the last session. (http://home.comcast.net/~csl.parts/Buttonwillow_0826/Buttonwillow_last.WMV)
Following a STi. (http://home.comcast.net/~csl.parts/Buttonwillow_0826/Buttonwillow_STi.WMV)
Secondly, an interesting mod with data to back up. For those who have followed one of my previous reports, I have an intercooler water spray system which I put together. The original intention was to spray the old ASA intercooler. Since my Alpina bumper opening is quite restricted, I needed to cool the top part of the IC. It worked well on the tracks. Since having the new Technik Engineering IC, the IC spray has proved to be less than functional, producing very minimal results. Reason is simple. The TE IC is wider and lower, which in fact is a nice pair-up with my bumper. This being the case, just a couple of days before the event, I decided to re-design, re-route and re-direct the spray nozzles at the oil cooler instead. Don't take this the wrong way. The oil cooler works wonder as is. But with 40~45C (104 ~113F) on the tracks, I figure additional cooling won't hurt.
Here are the nozzles pointing at the oil cooler.
<img src="http://home.comcast.net/~csl.parts/Buttonwillow_0826/oc_spray.jpg">
Now, you must be thinking: "3 small nozzles and what can they do?". It's all about doing the engineering math, choosing the right nozzles and pressure.
Here's the graph.
<img src="http://home.comcast.net/~csl.parts/Buttonwillow_0826/oc_spray_data.jpg">
"Oil X" means oil temperature for session X. Similar notation for "IAT X". Oil and IAT from the same session have the same line colors. The percentage next to "Oil X" presents whether the spray was used. 100% means the system is armed and will spray when boost is above 0.10kgf/cm^2. There is a 40% in Session 3. The reason is almost half way through the session, I ran out of water in the tank. Session 4 is 40% as well, cos I only have 0.2gal of distilled water left. So I had to disarmed the system half way through. 0% means system not armed and not used.
Towards end of the day, it was so hot that I pitted earlier. So the data logging is shorter.
This is getting REALLY technical. Be prepared.
So what do we observe here from the graph? Oil temp from Session 2 never exceeds 130C with and average IAT of about 35C. This is also the session when the spray system was used throughout the session. One might argue that the day wasn't that hot to begin with. IAT of 35C was measured at air in motion.
Session 3 is interesting. As mentioned, I dis-armed the spray almost half way through the session and you can see the oil temp rising from 901 on.
Session 4 (after refilling the tank with 0.2 gal) shares similar oil temp profile. But soon the water ran out and I decided to pit.
Now, Session 5 is totally without using the spray. Note also that IAT 3, 4 and 4 were similar. I drove the car as just hard and without the spray, see how the initial oil temp profile in Session 5 rises. It peaks as high as the non-sprayed section in Session 3 as indicated by the black arrows. I pitted early and called it a day.
========================================
Other things to mention:
1. After fixing the hose (as per this saga (http://forum.e46fanatics.com/showthread.php?t=284800)), it never popped off again. Everything is working as intended.
2. I upgraded the brake caliper guide sleeves from OEM rubber to solid brass. Braking feel is better. The upgrade is more significant if you track your car. <img src="http://home.comcast.net/~alpina.nut/solid_caliper.jpg">
========================================
My next report will be end of Sept. Until then, drive safe! :thumbup:
