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Old 07-09-2019, 12:06 AM   #3669
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@KevBRZ I run as low as 24psi on asphalt, 245/40/17 RE71R... As does a competitor in his STX BMW, which is a good bit heavier.
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Old 07-09-2019, 11:27 AM   #3670
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Originally Posted by KevBRZ View Post
I picked up the car back in late January and was originally going to start in DS, well I sold my DS wheels and currently have SSC wheels and tires and SSC koni yellows, and picked up a Greddy GT catback, well after long thought, lol, i think futuristically i wanna be adding power ie header and tune so i might as well build toward stx then, not SSC so not have to tear suspension back off,, So will my 17 x 8s be good enough (love the looks of them Gloss bronze ampliforms) if i put say 245/40/17s on them right now i got at least 75% worn azenis SSC spec size, and what about throwing a set of springs on the konis, ie maybe Swift spec r etc? my next thing was to get an alignment kit. I wondered if i would be better off just selling the SSC konis top hats and all and put that money onto a set of coilovers like maybe SS1 or ST XTAs? This car is mostly gonna be a daily with some autox events here and there and couple track days, just want to have some fun locally. thanks . One concern i have is i was unaware of the decreased ground clearance of that GT exhaust till after i bought it, so i think being a daily and the fact of that exhaust prob a 1 inch drop max is prob all i want to do.
I realize I'm a full month late to this conversation but I caution you not to try running Konis with STX sized wheels/tires. The spring perch for Koni / OEM shocks is too big.
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Old 07-09-2019, 11:35 AM   #3671
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re wheels

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Originally Posted by Locust View Post
I realize I'm a full month late to this conversation but I caution you not to try running Konis with STX sized wheels/tires. The spring perch for Koni / OEM shocks is too big.
Thanks Locust, i actually sold my Koni setup when i decided to go stx so prob will go coilovers.

Last edited by KevBRZ; 07-09-2019 at 02:13 PM. Reason: error
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Old 07-09-2019, 12:50 PM   #3672
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Originally Posted by snoxracer183 View Post
An oil cooler is the only legal way to cool your engine in STX
That's what I was afraid of. Dang.

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Originally Posted by nico_rsx View Post
Before investing money, you should monitor your oil temperature properly. You can do that with an OBD2 dongle and torque app.
210-220 F oil temperature is not a problem at all. It's actually a perfect temperature when tracking. I highly doubt you'll see problematic temperature when doing AutoX.
I didn't think about that until afterwards unfortunately. I'll have to check next time.

I expect regular AutoX would be fine, but for schools and Test&Tune maybe not so much. For instance at the school we were doing 5-8 runs per session with maybe 30 seconds between each run.

It's also my 100k mile daily and I'm a bit concerned about cooking the engine, so I may be being a bit overcautious.
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Old 07-09-2019, 02:17 PM   #3673
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re wheels

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@KevBRZ I run as low as 24psi on asphalt, 245/40/17 RE71R... As does a competitor in his STX BMW, which is a good bit heavier.
was that on a 17 x 9 or 17 x 8? i was thinking on the 17 x 8 i may be forced to run higher pressures to stop rollover or edge damage unless i do hella camber lol only reason asking is i bought new 17 x 8s and i they do make ampliforms in 17 x 9s in 40 offset so i think they should work....so if you can run that low on the 17 x 9s that is great.
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Old 07-09-2019, 08:09 PM   #3674
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Quote:
Originally Posted by KevBRZ View Post
was that on a 17 x 9 or 17 x 8? i was thinking on the 17 x 8 i may be forced to run higher pressures to stop rollover or edge damage unless i do hella camber lol only reason asking is i bought new 17 x 8s and i they do make ampliforms in 17 x 9s in 40 offset so i think they should work....so if you can run that low on the 17 x 9s that is great.
Forgot that bit. 17x9, and I agree. Pretty hard to beat the 949 6ul as a workhorse that clears anything and is affordable to replace when its time.

17x8 would be great for your rain tire setup
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Old 07-12-2019, 10:22 PM   #3675
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Originally Posted by MaverickMonk View Post
That's what I was afraid of. Dang.



I didn't think about that until afterwards unfortunately. I'll have to check next time.

I expect regular AutoX would be fine, but for schools and Test&Tune maybe not so much. For instance at the school we were doing 5-8 runs per session with maybe 30 seconds between each run.

It's also my 100k mile daily and I'm a bit concerned about cooking the engine, so I may be being a bit overcautious.

Switch to 10w30 oil for summer/autocross use and don't worry about it too much
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Old 07-15-2019, 07:23 AM   #3676
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Switch to 10w30 oil for summer/autocross use and don't worry about it too much

So I feel like a thicker oil like you suggested would serve my car well and oil has possibly contributed to my intermittent slow cam response cel that I get at autocrosses...

...but so far I've ran the Toyota stuff, with the idea that it'd be more defensible if I had to make a claim under drivetrain warranty.
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Old Yesterday, 08:22 AM   #3677
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Originally Posted by strat61caster View Post
I've seen 240 autoxing, I haven't done anything about it and don't plan on doing anything about it, but one of the few days I did log it that's how high it got. ~60s fast course, 95+ outside temp, probably not an issue at all if the course is short or it's a cool day.

+1 on going the oil cooler route if you're worried, there's the Forester cooler which might take the edge off enough for all autox to be safe, but it doesn't hold up to track lapping.
I have seen my oil temps go this high before, and maybe higher during autocross and highway driving im thinking of getting the jackson racing oil coolerName:  20190629_094004.jpg
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Old Yesterday, 11:01 AM   #3678
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I run an oil cooler after I saw ~250*F when doing a handful of back-to-back runs. I'm sure it's fine without, but the cooler makes me feel better about things and now I don't see much more than 210*F and cooler than that when not autoxing. I stick to 0w-20 since it's not cruising at 210*F all the time now.
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Old Yesterday, 12:01 PM   #3679
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I had a cooler on my STX car cause I was tracking it, but it was nice for autocross. I would see it get to 215-220F or so sitting in grid with no airflow. Get on course and oil temps dropped, haha



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So I feel like a thicker oil like you suggested would serve my car well and oil has possibly contributed to my intermittent slow cam response cel that I get at autocrosses...

...but so far I've ran the Toyota stuff, with the idea that it'd be more defensible if I had to make a claim under drivetrain warranty.

Yeah, low viscosity so there's less pressure and there goes the cam authority...
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