10-31-2019, 10:08 PM | #67 |
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I think this is the scenario that pz619 mentioned where this does not help:
Imagine you are already at redline in 3rd gear and you shift into 2nd by accident instead of 4th. You were already at redline and at the limiter basically, so you will not hear too much of a difference when the car goes to blip the throttle to the rev limiter when you enter the gate of 2nd. In practice I am sure it depends on timing. You will hear something because your foot would normally be off the throttle at that point, but is it clear enough? |
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10-31-2019, 10:39 PM | #68 | |
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10-31-2019, 10:54 PM | #69 | |
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But hey, I’ve been wrong before. |
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10-31-2019, 11:52 PM | #70 | |
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11-01-2019, 12:59 AM | #71 | |
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It would be easy enough to prevent the stick from even engaging the gear, but I guess that costs money and adds another point of failure for how rare money shifts are. |
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11-01-2019, 08:19 AM | #72 | |
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11-01-2019, 09:02 AM | #73 | ||
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11-01-2019, 10:42 AM | #74 | |
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11-01-2019, 10:51 AM | #75 |
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Ouch! That's painful. Having learnt to drive in the UK, I did so in a manual driving my dads E46 320i.
He made me sit in the car with the engine running going up and down the gears....(at the time just 5 gears). He didn't let me drive until I could shift into the correct gear with my eyes closed, and he would never let me short-shift. This is exactly the technique I learnt and I've never missed a year in 21 years of driving... http://store.uucmotorwerks.com/artic..._technique.htm Sadly I'm now driving automatics and I don't think my 2 year old son will drive a manual when he learns to drive. It's a dying skill....
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11-01-2019, 10:56 AM | #76 |
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11-01-2019, 11:16 AM | #77 | |
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Thank you for sharing, gave me a good lol this morning.
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11-01-2019, 11:29 AM | #78 | |
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It's been feeling natural for years now and shifting the 'old way' feels weird.
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11-01-2019, 11:32 AM | #79 |
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First time driving stick?
I learnt to drive in a manual in the U.K. when only about 1 car in 100, maybe a 1000 was an auto. I really don't get what he did here!
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11-01-2019, 11:33 AM | #80 |
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OP here! I’ve been busy but I‘ol try to answer every question I saw.
Yes, 4th to 3rd. Spun just under 9500rpm. Piston heads trashed, valves bent, but rods were straight. Crankshaft was irreparable as well. Connection from shaft to crankhub bolt was also destroyed. I had Vargas Turbos crankhub bolt lock on at the time. Was not stock. Stage 2, Catless Downpipes, EVenturi intake, BMS JB4 as boost controller, Bootmod3 stage 2 aggressive ots. If you guys have more specific questions such as price, current set up, etc, hit my instagram messages @M2_Skyblue. Pics of the pistons are there as well. TLDR; car is back on the road as of August ‘19 and more mods are on now. |
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11-01-2019, 11:34 AM | #81 | |
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With the super low gearing (high if you think of the wheels being the driving source), the wheels will simply spin the motor beyond its redline. That's all there is to it.
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11-01-2019, 11:34 AM | #82 |
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11-01-2019, 11:37 AM | #83 |
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welcome back
Glad it's back on the road although it must have been an expensive journey.
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11-01-2019, 11:54 AM | #84 |
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I nearly hit the same fate a while back. I knew immediately that I hit the wrong gear though, and didn't let the clutch out. Thank god. Glad to hear the car is back on the road OP.
I'm actually curious what overrev would show up in the DME report on a Porsche though in the same situation (not OP, me) if any. I.e., no money shift -- just shifting from 4th to 3rd on accident, but not letting clutch out, and then shifting back into 5th after. I don't think the computer's rev match would rev the motor past redline, so I assume it's actually not an overrev at all. I think bouncing off the rev limiter (in gear) DOES generate something along the lines of a range 1/2/3 -- though not sure. 4/5/6 can be the risky ones.
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11-01-2019, 12:31 PM | #85 |
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I will say tho, your car sounds incredible! I didn't know that engine could sound so good.
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11-01-2019, 02:42 PM | #87 |
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it's also a good idea to double declutch when downshifting. With the gear selector in neutral on the way for example from 4th to 3rd, while passing neutral lift up on the clutch and then immediately declutch and complete the shift.
Two things happen - you slow down the spinning components of the clutch and u give yourself an extra moments to sense the gear selector is in the right plane. On older crash box style transmissions you'd have to do the double declutch. Since it's done under braking your minimizing a time loss when going for a quick lap for example. |
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