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      11-12-2012, 10:28 AM   #1
phrenetiK
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Traction tips for FBO cars?

I'm running 275s in the rear. This morning I did a pull in high 50 degree weather and didn't fully hook until 52mph or so. Is there any alternative than to buy 140 treadwear tires or slip the hell out of my clutch?

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      11-12-2012, 11:07 AM   #2
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I don't know if Cobb offers boost limiting in 1st/2nd in their tune, but the JB4 does.
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      11-12-2012, 12:00 PM   #3
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Yea, it's called better proper tires like some good, sticky tires. You shouldn't have problems with the size tires you have but you need to have the proper tires. I'm sure you could hook with 255 sized tires that were sticky. So something like Nitto's, Potenza S-04 Pole Position, Z1 Star Specs....just to name a few.

But with the temps being in the 50s doesn't really help out much neither.
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      11-12-2012, 12:08 PM   #4
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A real limited slip diff? Got some lights on that dash too, what's up there?
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      11-12-2012, 01:01 PM   #5
phrenetiK
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rear o2 sensor code, no tpms (aftermarket wheels, too lazyto code it out)
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      11-12-2012, 04:14 PM   #6
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#1, Don't slip the clutch, let off the gas! The clutch is not for traction control. I have no idea why you would slip the clutch in reaction to not hooking up. That is a horrible idea.

#2, Limited slip diff

#3, Sticky tires

There's no magic want for this. 350+whp is a lot to put down through two 245-275mm street tires in 1st gear. Don't peg the throttle so hard in 1st. Leave TC on until you know how to drive the car.
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      11-12-2012, 04:21 PM   #7
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      11-12-2012, 04:29 PM   #8
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Michelin PS2s...IM FBO and when the tires were above 50% life they would hook great if the pavement was good.
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      11-12-2012, 04:32 PM   #9
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      11-13-2012, 12:15 AM   #10
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have LSD and my car hooks like a Monster off the line. 2.0 60ft times at a minimum with crappy Hankook V12s
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      11-13-2012, 01:58 AM   #11
deploytosave
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Quote:
Originally Posted by Freon View Post
#1, Don't slip the clutch, let off the gas! The clutch is not for traction control. I have no idea why you would slip the clutch in reaction to not hooking up. That is a horrible idea.

#2, Limited slip diff

#3, Sticky tires

There's no magic want for this. 350+whp is a lot to put down through two 245-275mm street tires in 1st gear. Don't peg the throttle so hard in 1st. (2) Leave TC on until you know how to drive the car.
Who told you to not slip the clutch? im most curious... because you are 110% dead wrong... yes its hard on the clutch, but the question wasnt "how can i drive my car softer" it was how can i hook better...
you slip the clutch to reduce shock on the tire...

(2)right, because youve obviously displayed an enormous amount of car driving knowledge as your credentials for telling someone how to drive... whats going to happen if he lets of the throttle? sure itll stop spinning, and as soon as he lays in again, itll begin spinning... you need to spend some time at the 1320

Quote:
Originally Posted by chesterfan1230 View Post
have LSD and my car hooks like a Monster off the line. 2.0 60ft times at a minimum with crappy Hankook V12s
doesnt need an LSD, just needs to reduce the shock on the tire is all, not to mention it was a brisk morning in houston today, the streets were likely cool, and his car was probably making a tad more power..

i 2.0'd my 60' on 50k OEM runflats...


Phrenetik, i know youve seen me launch my one multiple times, here is my advice...

check tire pressure, now let 5psi out.. thats a start.. practice coming out of the clutch slowly and smoothly, let it start to pull the car forward before applying gas, this will reduce any shock against the tire, the next most important thing is to not go straight to the floor, practice rolling into the throttle, and to fix your inbetween gears spin, simply slow your shifts down, you likely wont be losing any races by .1 of a second, so that extra hard slamming of the gears isnt going to help you do anything but spin... focus on shifting the same way you take, off... let the clutch grab and begin to pull the car, and slowly roll into the throttle, this whole action needs to be as smooth as possible...

practice practice practice
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      11-13-2012, 02:10 AM   #12
deploytosave
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http://www.facebook.com/photo.php?v=...9050037&type=3

credentials if you will...
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      11-13-2012, 03:58 AM   #13
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lol, just fucking lol.

So, you want to slip and wear your clutch, which is going to be a several thousand dollar part to replace, so you don't put any 'shock' on your tires?

Right.
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      11-13-2012, 04:33 AM   #14
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Coming from a IRS 06 GTO with around 370 rwhp I never slipped the clutch. I bring it up to 2300 rpms and side step the clutch which always resulted in low 1.8x 60' times on 245 all-season tires with about 10k miles on them. The GTO is worse than the 1er with wheel hop and even on the street I would not slip the clutch. Then when the rear would hop or scream for traction I'd just ease of the gas a little then ease back into it.

Slipping the clutch is good for the drag strip as there are a number of cars that like this better than side stepping. Especially when you get into the higher HP numbers. You could try to ease into the gas and not just jab it upon shifting or launching.

I've yet to take this car to the drag strip but I can side step the clutch with no issue's. Of course I'm stock but we'll see what I can do at the track next year.
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      11-13-2012, 11:02 AM   #15
deploytosave
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Quote:
Originally Posted by 135Hoser View Post
lol, just fucking lol.

So, you want to slip and wear your clutch, which is going to be a several thousand dollar part to replace, so you don't put any 'shock' on your tires?

Right.
You must've missed the part where I admitted it was hard on the clutch


I agree that this shouldn't be part of your everyday driving routine lol
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      11-13-2012, 11:28 AM   #16
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For 50degrees on the street without messing with traction control, without an LSD and with a manual transmission you handled that very well IMO. Any car with the amount of low end torque we get is gonna be a tire burner. My car is a step so I can just stomp it. Before I got my LSD I'd often completely spin out one tire and barely move at first if I hadn't messed with traction control first. An LSD helps with consistency for sure. Not much else you can do for regular street driving IMO. Your gonna spin, especially on cool streets.
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      11-13-2012, 03:41 PM   #17
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Quote:
Originally Posted by deploytosave View Post
Who told you to not slip the clutch? im most curious... because you are 110% dead wrong... yes its hard on the clutch, but the question wasnt "how can i drive my car softer" it was how can i hook better...

you slip the clutch to reduce shock on the tire...
Our drivetrains have a dual mass flywheel, plenty of other cushion in the driveline, and an engine that is quite responsive to throttle changes. Maybe that's a great solution for your rail car with a solid clutch, but there is no reason in a 135i as opposed to letting off the throttle. Especially on the street. There's no reason to slip the clutch much beyond the launch. If you spin you are using too much throttle. This is a massively powerful engine.

OP is not a professional drag racer with a solid clutch disk, drag radials, solid driveshaft. This is a street car, street tires (he doesn't even want to get 140TW tires...), on the street, with probably 350whp+... He will never "hook" in 1st with his foot all the way in. Never. Will not happen. He has no idea how to drive his car. Step 1 is he needs to stop pushing the throttle all the way in 1st gear on the street with his 200+TW street tires.

Quote:
(2)right, because youve obviously displayed an enormous amount of car driving knowledge as your credentials for telling someone how to drive... whats going to happen if he lets of the throttle? sure itll stop spinning, and as soon as he lays in again, itll begin spinning... you need to spend some time at the 1320
Appeals to authority, personal attacks, unstated unassumptions. There is no reason for me to respond to any of this other that to point out the flaws. This paragraph is a non-starter for having a reasoned discussion. You're going to have to try harder.
Quote:
i 2.0'd my 60' on 50k OEM runflats...
All sorts of problems here.
1. Conditions? Track prep? Suspension? There's no great way to compare across what anyone else might say.
2. Plenty of people have done much better, including myself. You undermine your own personal attacks and appeals to authority by posting a fairly typical time for people who are somewhat decent at launching.
3. I simply cannot fathom an OEM runflat that lasts to 50k (mi or km) without exploding, or throwing belt wires all over the highway. No way. It's barely a 20k mile tire. If you are riding on OEM runflats with that many miles you are a hazard to everyone else on the street. STOP IT.
Quote:
check tire pressure, now let 5psi out..
No, leave the recommended pressure in the tire. First, go to a drag strip. Accept that on the street you will not be able to put down 350+whp, and you will spin your way through 1st and possibly 2nd if you put a brick on your accelerator pedal. You'll be lucky to do so even on the strip with street tires at least in 1st. If you really could put that kind of power down you should be down to ~1.7 short times, maybe even better.

Quote:
practice practice practice
Well, we can agree there at least...
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      11-13-2012, 04:08 PM   #18
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Don't want to add to the p____ contest already in progress, but I have $0.02 to add:

1. As others said: You will not "hook" in 50F weather on street tires.

2. Don't do shitty acceleration videos with handheld phones. It's stupid, don't do it. Secure the phone/camera and/or use GPS apps.

3. You don't need an LSD. BMW eLSD is fine for straight launches. Go outside now, do a hard launch. Count number of black marks on pavement...
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      11-13-2012, 05:17 PM   #19
phrenetiK
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video would have been better if the road was straight lol
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