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Old 02-24-2013, 06:41 PM   #26
cjaghblb
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Great thread, I intend to start my own thread having been at this track day thing for about a year but I need 3 good posts first! Here's #1.
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Old 02-24-2013, 06:52 PM   #27
cjaghblb
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BTW, I spent some time researching the brakes situation after getting quotes for an expensive DBA 2 piece rotor braking setup to justify the expense. I came to the conclusion that it wasn't warranted for my experience level and commitment to the sport. I did upgrade the following however, stepped up to stainless lines at each corner, Motul RFB 600 fuild, and Hawk HT-10 pads at all 4 corners. I did this after my 3rd event and am still going strong with this. I intend to step up to Hawk DTC-60 pads up front once the HT-10s are done to see if it improves me track experience (meaning times!). Post #2!

Last edited by cjaghblb; 02-25-2013 at 11:05 AM.
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Old 02-24-2013, 07:07 PM   #28
cjaghblb
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To submit an answer your question about tranny/diff oil. I run Motul Gear 300 75w90 in the trans and Motul Gear FF Competition 75w145 in the diff. I did this completely on the recommendation of an experience builder/racer so understand that I have no genuine experience on what would be better or worse. I intend to change once a year when I average about 2500 miles on the car between 12 or so events and travel to/from. Please provide your 2 cents if you have something better than this for a relatively stock drivetrained STi. Post #3....I am golden!

Last edited by cjaghblb; 02-25-2013 at 10:36 AM.
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Old 02-25-2013, 09:06 AM   #29
mjfubar101
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I use the Motul fluid in the diff and trans as well although for some reason your weights seem different than what I am using cjaghblb.
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Old 02-25-2013, 10:35 AM   #30
cjaghblb
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Quote:
Originally Posted by mjfubar101 View Post
I use the Motul fluid in the diff and trans as well although for some reason your weights seem different than what I am using cjaghblb.
Yeah, I got the two oils transposed, I will edit and correct it.
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Old 02-25-2013, 04:04 PM   #31
yoshi0423
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Quote:
Originally Posted by mjfubar101 View Post
I use the Motul fluid in the diff and trans as well although for some reason your weights seem different than what I am using cjaghblb.
I've read that you should run the OEM Subaru LSD fluid in the rear diff due to design... 07+ you can run regular oil?
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Old 02-26-2013, 06:46 PM   #32
SubieEngineer
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Quote:
Originally Posted by yoshi0423 View Post
I've read that you should run the OEM Subaru LSD fluid in the rear diff due to design... 07+ you can run regular oil?
Correct, you must run a LSD fluid (that has the friction-enhancing additives) in the 04-06 STI rear diff, and can run regular 75w90 transmission fluid in the 07+ STI rear diff. Reason: 07+ is torsen, and doesn't use clutch packs.

I can't speak for the 04-06, but my 07 transmission much prefers Subaru Extra-S compared to the Motul that I ran in it for a year. The rear diff didn't seem to care what it received.
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Old 02-27-2013, 09:44 AM   #33
cjaghblb
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Quote:
Originally Posted by SubieEngineer View Post
Correct, you must run a LSD fluid (that has the friction-enhancing additives) in the 04-06 STI rear diff, and can run regular 75w90 transmission fluid in the 07+ STI rear diff. Reason: 07+ is torsen, and doesn't use clutch packs.

I can't speak for the 04-06, but my 07 transmission much prefers Subaru Extra-S compared to the Motul that I ran in it for a year. The rear diff didn't seem to care what it received.

Can you expand on the comment about Extra-S? What feedback did the transmission give you that leads you to the conclusion that its a preferred oil. I am imagining that your shifts were more consistent/smoother with a reduction in difficulty completing the shift? Anything else?
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Old 02-27-2013, 02:29 PM   #34
Griever423
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Quote:
Originally Posted by yoshi0423 View Post
I've read that you should run the OEM Subaru LSD fluid in the rear diff due to design... 07+ you can run regular oil?
Nothing wrong with running Motul synthetic in the rear diff. I did it on my STi and it didn't hurt it at all.
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Old 02-27-2013, 09:25 PM   #35
SubieEngineer
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Quote:
Originally Posted by cjaghblb View Post
Can you expand on the comment about Extra-S? What feedback did the transmission give you that leads you to the conclusion that its a preferred oil. I am imagining that your shifts were more consistent/smoother with a reduction in difficulty completing the shift? Anything else?
It seemed fine on the Motul at first, but the transmission gradually became more and more noisy. Additionally, when it was cold out (< 20*), it was much harder to get into 1, and from 1-2/2-1. Those particular shifts were much easier with Extra-S, and the transmission was quieter to boot.
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Old 03-05-2013, 01:50 PM   #36
chrisbolton
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+1 for looking into a miata for track days. Not to be discouraging from using your STI for track days. In fact owning a car with the potential the STI has seems silly not to use it for some type of motorsport. I'm just coming from a low budget mindset, and they definitely seem like the cheaper alternative to learning how to drive compared to building a DD for the track too. Just my 02, thinking out loud and more for my application I guess. Great advice guys, thanks. And OP your STI looks great, I wish I could build one!

Last edited by chrisbolton; 03-05-2013 at 09:12 PM.
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Old 03-12-2013, 11:58 AM   #37
quattrocup
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spend more on the most important upgrade, the driver. too many people jump immediately into getting the car faster before knowing how to actually drive it faster.

that being said, i'll throw my hat in for the star specs. i also run ate super blue without issues.
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Old 03-12-2013, 05:26 PM   #38
Ken Cravillion
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I remember my first track day. I had a Stage 3 Forester (VF39, etc...) with a Wilwood BBK. I ran their "street/track" pad. Little did I realize how much Road America feasted on brakes... Those pads lasted 3 1/2 20 minute sessions before they were ground to the metal backing plates. It was not fun driving 1.5 hours home downshifting and using the parking brake to stop. Do yourself a favor and get track pads. Put them in the night before and bed them in on the way there. That's worked for me doing track days since then.
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