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Go Back   IWSTI.com: Subaru WRX STI Forums > IWSTI Engine & Drivetrain > 2.5 Liter/Litre Factory Motor


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Old 11-13-2005, 05:38 PM   #16
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Quote:
Originally Posted by klaymon
I've done it one time trying to pull out of a parking lot with no stop light and non-stop traffic. I held it to about 5K, waited for a hole, and feathered the clutch a little and dropped it. My goal was a quick insertion into traffic, not a burn out. It did it, but I can't say I really cared for it, since it was basically out of control.
I have to be carefully pulling out into traffic...in other words launching hard into a turn. My rear always wants to break loose and I have to feather off the throttle to get it back in line. Almost lost it the first time I did a quick turn into a main road.


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Old 11-13-2005, 05:56 PM   #17
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"Peeling out" is a high school/noob term.

We call it losing/breaking traction here.
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Old 11-13-2005, 06:03 PM   #18
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I don't get it, people on here are acting like it is a bad thing to spin the tires when launching the car (although I doubt my neighbor would appreciate it being done on his lawn). But I am speaking in terms of drag racing, and you really need to spin the tires some in order for a clean hard launch. Unless you enjoy slow times or breaking things of course.

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Old 11-13-2005, 06:04 PM   #19
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Oh, and yes you should be able to with stock power.

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Old 11-13-2005, 07:09 PM   #20
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I don't really have any trouble breaking loose (peeling out ) without dumping the clutch. All I have is an intake and a TBE, nothing else powerwise. Kinda fun at stoplights when letting off steam from work once in awhile
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Old 11-13-2005, 08:01 PM   #21
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+1 on spinning the tires with stock power.

I've only launched my car once. DCCD auto, 4k RPM, feather clutch and give lots of throttle to keep revs at 4k till the clutch is out. It took off like a rocket with a nice screech of the tires, and no clutch smell.

Flooring it while turning at a light will make a lot of fun tire noises as the turbo spools up & the rear end starts to come around. I've done that a lot, it's easier on the drivetrain than launching from the light. But more dangerous if you're not ready for Mustang-like power oversteer.

Oh, and on my snow tires, I chirped 2nd without even trying. Now THAT'S sick.
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Old 11-13-2005, 08:08 PM   #22
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i can't even spin my tires on gravel. what's wrong?
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Old 11-13-2005, 09:53 PM   #23
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Quote:
Originally Posted by BruceChapman
i can't even spin my tires on gravel. what's wrong?
Hey Bruce, let me borrow your ride and I will help show you how to do it

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Old 11-15-2005, 06:41 AM   #24
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Default Actually.. Hp Has little to do with "peeling out"

As far as I remember, Torque is the culprit..

HP is the ability to sustain that Torque through the "peel"

So you want more torque, first, more hp later.
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Old 11-15-2005, 06:53 AM   #25
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Ok, sorry to "hyjack" the thread, but since we are talking about all this, has anyone chirpped into 2nd, 3rd?!??!......I haven't really tried it that hard, but Bruce, I bet you can? Maybe its me being bored at work....sorry work sucks!
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Old 11-15-2005, 07:00 AM   #26
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Quote:
Originally Posted by xSTIx
As far as I remember, Torque is the culprit..

HP is the ability to sustain that Torque through the "peel"

So you want more torque, first, more hp later.
Horsepower isn't the ability to sustain torque. Horsepower is a function of torque and RPMs. Basically, you want to keep producing as much torque as you can right up until redline. The more torque towards the upper RPM range, the much higher the horsepower will be.

The ability to sustain a "peel-out" is basically as simple as overcoming traction. For us at stock power levels on dry roads this should only happen in 1st gear. As soon as you break traction, the amount of torque required to keep spinning the tires is dramatically reduced. Our fancy AWD system makes it hard to sustain a peel out though.

I've broken all 4 loose in light rain...in 2nd gear. That certainly surprised me. When I've launched on pavement, I almost always get the rears spinning and very occasionally the fronts too.

The best way to induce this at stock levels is to increase your tire pressure. That will allow you to "peel out" with a moderate launch (3-4k/slip).
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Old 11-15-2005, 08:49 AM   #27
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Quote:
Originally Posted by Chris05STi
Ok, sorry to "hyjack" the thread, but since we are talking about all this, has anyone chirpped into 2nd, 3rd?!??!......I haven't really tried it that hard, but Bruce, I bet you can? Maybe its me being bored at work....sorry work sucks!
I can chirp into 2nd with my snow tires, like I said a few posts back.
I tried w/ the RE070s earlier this year...forget it, at least w/ stock power. But after I got my snow tires, I did a spirited takeoff to 7k in 1st, then a moderately hard shift into 2nd. I wasn't really trying to chirp the tires, but they did. I was like, "WTF? no ****! Woohoo!"


Bruce, you're kidding, right? If not, how's your low-end power? Maybe you need to launch at higher RPMs to make up for that monster turbo?
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Old 11-15-2005, 09:19 AM   #28
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Ummmm..
Stage2 4th gear RE070's light rain/ sleet "peel out"
Winter combo going on at lunch.

Stock you can break traction in 1st if the ground is dirty or hard cornering.
Stage1 add 2nd w/ dirty and hard cornering
Stage2 add 2nd w/ dirty road.
Now none of these are sustained RWD smoking tire killing burn outs. Just slight .25 second traction loss events. Then the beauty of AWD kicks in.

Personally I judge any traction loss event as a mistake on my part for road condtions.
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Old 11-15-2005, 09:22 AM   #29
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I have pulled out on a dry road spinning for a good 15-20 feet. But not from a roll.

If I am turning it will get a lot of spin from a roll, like if its a slow turn or merge and I floor it. Usually even in 2nd.
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Old 11-15-2005, 09:39 AM   #30
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This thread has gotten infinitely more useful, thanks! And based on the 430 views so far (noon on tuesday), I'm not the only one with this question.

I've never been able to break traction (thanks for the terminology correction, by the way) on a straight-line start. I have squealed the tires and slid a bit when cornering under hard acceleration, and that's scary because if the traction doesn't catch, you leave the road. Bad.

I'm still on my stock RE070s, and I am a bit timid with the clutch so I dont launch that hard, especially because the only launching I do is on the street.
Thanks for all the input. Anyone else care to chime in?


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