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Old 01-29-2014, 08:52 PM   #15
Sonolin
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Thanks @strat61caster and @wheelhaus !

I just got back from some testing, and my conclusion is everything is fine. 4 consecutive chirps from 1->2nd

I think the problem is I really have to ROMP on the gas pedal after shifting in order for it to chrip. Otherwise the tires won't chrip or will just kind of "spin" a little bit (kind of sounds like its just pushing gravel/dirt away from the tires) not generating enough chirp.

From now on I'll try to be smoother & more gentle with it thanks everybody!

EDIT: Also when I missed the shift, I don't think I even let out the clutch or even much at all (in second) and just quickly put it back into neutral. It definitely scared me and it did not sound right (revs rose fast) so I had a really quick reaction. So I think everything should be ok if anything probably just burnt up some of the clutch like stratocaster said. (P.S. I love strats I have 3 and just got a Fender American Deluxe std. )
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Old 01-29-2014, 09:17 PM   #16
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Quote:
Originally Posted by Monogram View Post
The majority of inexperienced drivers who "chirp" into 2nd and 3rd are actually locking up the rear tires causing a quick skid. This may have been the case, and now with a bit of experience the transition is smoother.
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Old 01-29-2014, 09:38 PM   #17
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Quote:
Originally Posted by Monogram View Post
Exactly what I stated.

Inexperienced drivers "speed shifting" will let the clutch out too quickly while getting on the throttle too late, causing a quick lock of the rear tires. Eventually they learn to modulate the clutch and throttle properly and there is no more chirp. It happens so quickly that it "feels fast".
Really... next thing you're going to tell me is that this is locking the rear tires

[ame]http://youtu.be/RlC1BtsWSng[/ame]
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Old 01-29-2014, 09:56 PM   #18
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Really... next thing you're going to tell me is that this is locking the rear tires

So much noises for a 15.xx time lol, I love our cars
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Old 01-29-2014, 10:03 PM   #19
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Quote:
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Full throttle lifts the front of the car, clutch in disconnects power causing weight shift to front of vehicle and off of rear tires, clutch out while getting back on throttle. Unloaded tires and clutch lock happens quicker than the engine can spool up even when speed shifting with your foot mashed to the floor during the entire process.
.
I was power shifting, or flat-shifting... you should know what that is.
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Old 01-30-2014, 12:07 AM   #20
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Old 01-30-2014, 12:35 AM   #21
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Garage
Winter gas formulation, maybe?
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Old 01-30-2014, 01:05 AM   #22
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No, please explain. (Is there a "smilies" where a character is repeatedly smashing his head against a wall)?
Just tryen ta hep out here....

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Old 01-30-2014, 01:12 AM   #23
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No, please explain. (Is there a "smilies" where a character is repeatedly smashing his head against a wall)?
You took the drag class... not me...
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Old 01-30-2014, 01:48 AM   #24
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Quote:
Originally Posted by Monogram View Post
Exactly what I stated.

Inexperienced drivers "speed shifting" will let the clutch out too quickly while getting on the throttle too late, causing a quick lock of the rear tires. Eventually they learn to modulate the clutch and throttle properly and there is no more chirp. It happens so quickly that it "feels fast".
There's two ways the tires will chirp when shifting aggressively.

The method you're describing causes a chirp when the engine revs drop TOO LOW, and clutch engagement forces sudden engine braking and the revs jump back up ("clutch lock" as you mentioned). This is deceptive because nothing is locking up besides the clutch engagement itself. The tires are NOT locking up as you describe, they're momentarily rotating slower than the car's movement, but they're still rotating. The feeling is a quick jerk as the car wants to slow down from sudden engine braking for a split second.

The second way the tires chirp is from applying throttle too aggressively or shifting much faster than the revs would drop. In this case, the engine revs are TOO HIGH and the tires are forced to momentarily spin faster than vehicle speed. The feeling is a quick thump in the backside as the car wants to lurch forward momentarily from a sort-of "launch" between gears.
This is what the OP is referring to, and where the confusion came from as you described the sloppy slow shift above.

The first is a result of poor technique, while the second is a result of overly aggressive technique. They will both cause excessive stress and wear on the drivetrain due to the sudden spikes in torque.
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Old 01-30-2014, 11:20 AM   #25
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If you want to talk in absolute values, I agree you are technically correct. However, the end result is no different than any other time the tires rotate slower than the forward speed of the vehicle, the tire skids on the pavement causing the chirp.
You're saying the tires are still chirping from rotating slower than vehicle speed, even when shifting hard and fast when the engine revs higher than clutch speed?
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Old 01-30-2014, 03:36 PM   #26
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Thanks everybody I got my answer mods please close
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