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01-09-2013, 12:43 PM | #1 |
Scooby Newbie
Member#: 333819
Join Date: Sep 2012
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Prepping for track duty - Oil Temp & Inj Duty Cycle
Ok, I'll start off that I've been searching these topics and PMing people before I even owned the car (2013 WRX base). I also understand that everybody's ambient conditions are different. I'm also only planning to do 2-3 track events per year.
Based on a Torqued Performance Stage 2 (Cobb DP), will running a Koyo radiator in combination with a KillerBee oil pan (1.3qt increased oil capacity) be enough to keep oil temps in check on the track and avoid an oil cooler? 2nd thing, I'm close to 99% inj duty cycle at higher rpm during one of my data logs in 3rd gear (35F day, almost at sea level in NJ). Should I be running larger injectors/fuel pump or could I just lower the boost (peaking at 19psi) a bit and with the warmer temps (Spring to Fall track season), the two will lower the inj duty cycle to a more acceptable range? It's tough, I see people going both ways on both topics, but thought I would post this in the motorsports section and here your opinions. I had an oil cooler and larger injectors on my previous 500hp LS1 based track car.
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01-09-2013, 01:05 PM | #2 |
Scooby Specialist
Member#: 73422
Join Date: Oct 2004
Chapter/Region:
SWIC
Location: Gilbert
Vehicle:04 STi JVP |
Do you have an oil temp gauge?
The increased oil capacity should make a BIG difference. |
01-09-2013, 01:05 PM | #3 |
Scooby Newbie
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NWIC
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Vehicle:2011 STI Sedan Silver |
I ran my 09' WRX at ~20 events a year for 2.5 years with the stock radiator, oil pan, etc..
I would suggest a very conservative tune for the track unless you are running race gas. |
01-09-2013, 01:12 PM | #4 |
Scooby Specialist
Member#: 73422
Join Date: Oct 2004
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SWIC
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Vehicle:04 STi JVP |
Yeah, you are pretty stock...I think an increased oil pan and a gauge to keep track of the #'s and you are G2G.
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01-09-2013, 01:14 PM | #5 | |
Scooby Newbie
Member#: 333819
Join Date: Sep 2012
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Quote:
With LS1 people would say it could hit 300+ and could do damage at 280F. My combo kept me in the 220-240 range. |
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01-09-2013, 03:07 PM | #6 |
Scooby Specialist
Member#: 84181
Join Date: Mar 2005
Chapter/Region:
NESIC
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Vehicle:NASA #530 GTS2 |
I have an N/A Race car - Heavily modified to make some good power (for a 2.5L N/A lol)
I have 12x8 oil cooler and my oil temperatures run around 240-250 in most conditions. I run a 10w-30 oil on cool weather days and may bump it up to a 10-40 if its hot as crap. Turbo motors run ridiculously hot, keep an eye on it. 280 is hot as hell... |
01-09-2013, 03:13 PM | #7 |
Scooby Guru
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Join Date: Sep 2007
Location: Aussieland
Vehicle:2003 SOHC destroker |
stock pan with no cooler... it'll get hot enough to start losing oil pressure. if you start losing oil pressure, it's definitely time to do something.
running a richer tune will cool things a bit better, and you can run straight water with water wetter to make your radiator cool things better too. so yes, if you lowered the boost a tad that will give you a safety buffer. a killer bee pickup, oil cooler, good brake fluid and good brake pads are the 4 bare minimums for track work (assuming your car is totally stock) IMO. also assuming you're running quality oils/fluids everywhere else at their maximum levels. heat wrapping the headers and dump will do wonders for underbonnet temps. |
01-09-2013, 03:42 PM | #8 |
Scooby Guru
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South East
Location: Wandering 285, GA
Vehicle:2007 350Zed Base Sold: 07 STI LTD #576 |
I had my tuner make me a road course map @ 18psi for my 1.5 XTR with a built motor and ELHs. At CMP in SC last month, my oil temp (using the rear gallery plug) climbed up to 260* towards the end of the day. I'm looking into oil cooling for this year.
For comparison's sake, 1.5 XTR, ETS TMIC, Tomei ELH/uppipe, Cobb TBE, ID 1000cc injectors, built motor, stock heads. |
01-09-2013, 03:46 PM | #9 |
Scooby Specialist
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Vehicle:2005 Legacy GT NASA SE PTB Champ |
for 2-3 track days I'd,
a. turn down the boost (dunno about the new STI, but isn't ist weird that your running out of injector, on stock turbo) b. change oil before and after track event c. buy oil temp and oil pressure gauges and pull off if things get too hot d. install good brake pads and let her eat |
01-09-2013, 04:02 PM | #10 | |
Scooby Specialist
Member#: 73422
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Vehicle:04 STi JVP |
Quote:
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01-09-2013, 04:31 PM | #11 |
Scooby Specialist
Member#: 30367
Join Date: Nov 2002
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Vehicle:2005 Legacy GT NASA SE PTB Champ |
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01-09-2013, 06:28 PM | #12 |
Scooby Specialist
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Join Date: Oct 2004
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01-09-2013, 11:17 PM | #13 |
Scooby Newbie
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BAIC
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Vehicle:2011 Impreza WRX DGM |
I track my 2011 wrx stage 2+ with built motor, ewg, avo tmic and a conservative tune from eq tuning on a stock radiator and oil plan. Have egt and oil temp gauge and when running 25min sessions I'm hitting 240-250f.
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01-10-2013, 08:35 AM | #14 | |
Scooby Specialist
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Vehicle:NASA #530 GTS2 |
Quote:
No offense of course, HPDE 1 is a great place to start! |
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01-10-2013, 09:06 AM | #15 |
Hoodbridge!
Moderator Member#: 560
Join Date: Nov 1999
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MAIC
Location: Woodbridge, VA
Vehicle:2006 STi, 16 Outback Crystal Gray, Silver |
I've been tracking my '06 STI for 6 years with the stock oil pan and no oil cooler. Never had a problem. This is with ~300 WHP & stock turbo. I used to run 15W-50 Mobil 1, but now run 15W-50 Motul. I usually fill it about 1/2 quart more than the owner's manual says. I don't have AC, so no condenser in front of the Koyo radiator. I also just just water + water wetter.
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01-10-2013, 10:41 AM | #16 |
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Staying on the stock turbo does not require an oil cooler as temps won't get higher than 240 on track. The biggest part to add to any track driven Subaru is a good air oil separator.
Tony |
01-10-2013, 11:42 AM | #17 |
Scooby Newbie
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Vehicle:2006 STI WRB |
I would say from my experience getting the gauges is the first step. Then seeing what the car is actually doing. If you find your car is pushing 250 in oil temp on the regular look into an oil cooler if not then you are set. I would say that tracking my car in 100+ degree weather here in so cal I have more problems keeping my water temp out of the red more than my oil temp.
Although I do have an oil cooler as well as a koyo rad. My oil temp has never gone over 260 with the cooler on. Other things I have had the fun of dealing with is brakes, I would recommend TI shims, a decent set of pads and nice fresh fluid. I have went to a brake duct system and now 2 pic rotors to help with cooling as well. |
01-10-2013, 11:43 AM | #18 |
Hoodbridge!
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What would you recommend? I made the mistake of trying the Grimmspeed one...and that's jaded me a bit.
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01-10-2013, 11:47 AM | #19 |
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01-10-2013, 11:52 AM | #20 |
Hoodbridge!
Moderator Member#: 560
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MAIC
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Vehicle:2006 STi, 16 Outback Crystal Gray, Silver |
Under high lateral load in extended duration cornering, it sucked oil out of the filler tube. Basically doing the opposite of what it was supposed to. On a street car it may work OK. But on a track car that has lots of sustained lateral Gs, it does more harm than good.
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01-10-2013, 01:59 PM | #21 |
Scooby Newbie
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I use the Crawford performance AOS and I have no problems with it.
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01-11-2013, 11:41 AM | #22 | |
Scooby Guru
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Vehicle:2007 350Zed Base Sold: 07 STI LTD #576 |
Quote:
Ditto. |
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01-11-2013, 12:08 PM | #23 |
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01-11-2013, 01:31 PM | #24 |
Scooby Specialist
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01-11-2013, 03:07 PM | #25 | |
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Quote:
I have a Koyo rad and stock oil pan with a stage 2 protune. I have seen up to ~270 oil temps in the block in 90* ambient temps, so things can get too hot even with stock turbo. In 50-70 ambient temps I usually don't see above 255* oil temps. |
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