Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB

Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Tracking / Autocross / HPDE / Drifting (https://www.ft86club.com/forums/forumdisplay.php?f=39)
-   -   Got a track related question? I'll try to answer. (https://www.ft86club.com/forums/showthread.php?t=38926)

gramicci101 06-07-2014 03:07 PM

That's a question for @CSG Mike or one of the other race drivers, but I'll contribute. You don't want the car tuned to oversteer, but it'll oversteer anyways if you give it too much power in a corner. Think spinning doughnuts vs. carving circles. It's easy enough to crank the wheel over, floor the throttle and whip the rear end around into a spin. It's less easy to crank the wheel over, give it enough throttle to break the rear wheels loose, then counter steer and turn your spin into a sustained and controlled drift that goes where you want it to go. It's much less easy to turn in on the correct line, ease in just enough throttle that the rear end barely starts to come around, don't counter steer at all, and then hold your car on that line by using throttle inputs to rotate the car through the corner. That's what throttle steering is.

RFB 06-07-2014 03:39 PM

Quote:

Originally Posted by gramicci101 (Post 1784115)
That's a question for @CSG Mike or one of the other race drivers, but I'll contribute. You don't want the car tuned to oversteer, but it'll oversteer anyways if you give it too much power in a corner. Think spinning doughnuts vs. carving circles. It's easy enough to crank the wheel over, floor the throttle and whip the rear end around into a spin. It's less easy to crank the wheel over, give it enough throttle to break the rear wheels loose, then counter steer and turn your spin into a sustained and controlled drift that goes where you want it to go. It's much less easy to turn in on the correct line, ease in just enough throttle that the rear end barely starts to come around, don't counter steer at all, and then hold your car on that line by using throttle inputs to rotate the car through the corner. That's what throttle steering is.

Then that must be what I am already doing.
Thanx.

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CERBERUS

orthojoe 06-07-2014 08:30 PM

Quote:

Originally Posted by jsimon7777 (Post 1783900)
I did not cord mine but did warrant them through Michelin because they wore out in 11k street miles. They wore faster on the insides by 3mm or so. Stock alignment.

No way. Your alignment must have been screwed up or the tires were screwed up to wear out OEM tires on 11k street miles.

becauseracecar1 06-07-2014 09:24 PM

Is it ok to push the pistons back with my fingers when changing back to stock pads after a track day? Thank you!!


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DatApex 06-07-2014 09:43 PM

Quote:

Originally Posted by becauseracecar1 (Post 1784546)
Is it ok to push the pistons back with my fingers when changing back to stock pads after a track day? Thank you!!


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Haha, if you can. Good luck, though. ;)

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gramicci101 06-07-2014 09:51 PM

I use a wood clamp. Before you remove the caliper from the bracket, hook one end of the clamp behind the caliper and use a socket as a spacer on the bracket. Then you can just ratchet the clamp shut; it pushes the caliper pistons against the rotor and forces them back into the caliper. Since the caliper is sliding on its pins and it's pushing against the rotor, the pistons get pushed straight in and there's no chance of them getting cocked in their bores.

dp1 06-07-2014 10:00 PM

Quote:

Originally Posted by becauseracecar1 (Post 1784546)
Is it ok to push the pistons back with my fingers when changing back to stock pads after a track day? Thank you!!


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You can use a small crowbar wrapped in painters tape at the elbow and tip to prevent scratching metal bits when you push against piston edge

troek 06-07-2014 10:35 PM

Quote:

Originally Posted by CSG Mike (Post 1783959)
Sounds like the next step is for you to learn to drive while maintaining a good slip angle (on the oversteer side, not the understeer side), without actually countersteering. Essentially, throttle steering, which is, technically, a subset of drifting. This is a faster way to corner that most people never reach.

i see guys doing this on the 100r at fuji, while they pas me, lol. i wondered if it was my eyes playing a trick on me or not.

CSG Mike 06-07-2014 11:26 PM

Quote:

Originally Posted by RFB (Post 1783974)
Interesting. My FRS it is balanced and neutral through the corners, no tendency to under or oversteer.
Im tracking the Mosport Gran Prix track next week (long high speed straights and corners).
Any tips on how to better throttle steer ?

http://i628.photobucket.com/albums/u...ps3eb3bee8.gif

CERBERUS

If there's no tendency to under or oversteer, then you still have tire grip left. Enter the corner faster and/or give the car more gas mid-corner, and power out earlier.

Throttle steer? You need a near-neutral car to do it. You literally... press on the gas more until your car starts rotating mid corner, and you control that rotation with the gas pedal.

Having an aftermarket LSD makes this throttle steer window substantially larger.

CSG Mike 06-07-2014 11:27 PM

Quote:

Originally Posted by RFB (Post 1784061)
When I hit a corner harder my rear does not fish tail. All 4 tires screech and the whole car slides slightly outward off my intended apex line. Letting off on the throttle (if I haven't gone too far) gets me back.
Does that mean I am throttle steering ?

http://i628.photobucket.com/albums/u...ps3eb3bee8.gif

CERBERUS

That's understeer.

Quote:

Originally Posted by RFB (Post 1784159)
Then that must be what I am already doing.
Thanx.

http://i628.photobucket.com/albums/u...ps3eb3bee8.gif

CERBERUS

See above...

CSG Mike 06-07-2014 11:28 PM

Quote:

Originally Posted by RFB (Post 1784106)
When I don't hit the corner harder and push harder through the corner the rear end does not oversteer.

I can tune the car for oversteer with tire pressure but I'm slower (always correcting for fish tail).

What would I do to be faster with oversteer ?

And no I don't experiment with close walls LOL !

http://i628.photobucket.com/albums/u...ps3eb3bee8.gif

CERBERUS

You're tuning the car for oversteer by reducing rear tire grip. Instead, you want to increase front end grip. How you do this varies.

CSG Mike 06-07-2014 11:29 PM

Quote:

Originally Posted by becauseracecar1 (Post 1784546)
Is it ok to push the pistons back with my fingers when changing back to stock pads after a track day? Thank you!!


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If you can, it means your caliper is in great shape!

CSG Mike 06-07-2014 11:30 PM

Quote:

Originally Posted by gramicci101 (Post 1784115)
That's a question for @CSG Mike or one of the other race drivers, but I'll contribute. You don't want the car tuned to oversteer, but it'll oversteer anyways if you give it too much power in a corner. Think spinning doughnuts vs. carving circles. It's easy enough to crank the wheel over, floor the throttle and whip the rear end around into a spin. It's less easy to crank the wheel over, give it enough throttle to break the rear wheels loose, then counter steer and turn your spin into a sustained and controlled drift that goes where you want it to go. It's much less easy to turn in on the correct line, ease in just enough throttle that the rear end barely starts to come around, don't counter steer at all, and then hold your car on that line by using throttle inputs to rotate the car through the corner. That's what throttle steering is.

A common setup we get requested is a car that oversteer at low speed, where risk is low and the car is easy to manage, and understeers at high speed, where risk is higher.

This way, you can easily rotate around the low speed stuff, and have confidence in the high speed stuff.

I consider a neutral car one where you can dictate whether you under or oversteer, at will with steering or weight transfers, and can be throttle steered. A car with a ton of power that uses that power to oversteer is not necessarily a neutral car. Any car with big power can break tires loose.

CSG Mike 06-07-2014 11:32 PM

Quote:

Originally Posted by troek (Post 1784637)
i see guys doing this on the 100r at fuji, while they pas me, lol. i wondered if it was my eyes playing a trick on me or not.

Those guys are serious drivers :party0030:


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