10-26-2019, 08:20 AM | #23 |
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10-28-2019, 01:38 AM | #24 |
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10-28-2019, 01:01 PM | #25 | |
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The intentional braking thing is a myth, too. It would just cause accidents. |
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10-28-2019, 01:24 PM | #26 | |
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10-28-2019, 01:40 PM | #27 |
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And if there was nothing preventing it I would have needed at least 3 new V8s for my Mustang. Also you never see money shift threads on Mustang forums these days. I’m not saying spark and fuel cutoff guarantee no money Shifts. But it works in a Mustang on a 4 to 3 mis-shift. I was quick to get back on the clutch, but still. The V8 has more inertia and revs slower (therefore dragging the rear wheels some causing the squeal I heard every time) thus allowing more time to get back on the clutch.
I’ve never done a 2 to 1 but in that situation a lockout would be the only thing that could help. |
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10-28-2019, 08:20 PM | #28 |
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I've definitely had a lock out in at least one of my cars. You could hover the shifter near first and it just wouldn't go in until the RPM's dropped to a certain point. Not sure of the exact logic, but it was there.
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10-28-2019, 08:24 PM | #29 | ||
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Forgive me if I don't believe your explanation with no evidence. The hard truth is that you got lucky and/or that engine happens to be able to take spinning faster than redline better than some others. There is no way to stop a money shift if the transmission lets you into the gate. I found 3 reports of it on Mustang GT Coyote V8s in a really quick google search. Last edited by chris719; 10-28-2019 at 08:30 PM.. |
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10-28-2019, 08:29 PM | #30 | |
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10-28-2019, 09:29 PM | #31 | |
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Where fuel and spark cutoff can help is if the cylinder is still combusting but the piston is traveling back up. Eliminating the combustion at least takes one stress factor off the table. The reality is even then, if the overrev is severe enough, damage is still going to occur. Now there is definitely credence to different motors being more susceptible. Some motors have more clearance between valves and pistons, others have forged connecting rods. These won’t always eliminate the chance of a catastrophic failure, but can help mitigate some of the ill effects. |
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10-28-2019, 11:31 PM | #32 | |
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Me too, I also add a bit of pressure when using hand shake and back hand grips so it will always slot in to the left or right gates respectively, and has zero chance of staying in the middle gate.
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10-29-2019, 12:42 AM | #33 | ||
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10-29-2019, 01:23 AM | #34 |
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Got a link to an informed source? All I can find is that they are hard to put into first because of the gearbox being that way, not some intentional over-rev lockout. Bet $20 there is no lockout and it's just the speed / ratio difference and crappy synchro.
https://www.clubwrx.net/threads/1st-gear-lockout.82102/ |
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10-29-2019, 01:32 AM | #35 | |
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Doesn't mean I don't love it though. It's still awesome today. Talking of money shifts I remember a guy doing one on his brand new e46 M3 at a track day many years ago. What a mess! Some subterfuge involving a tow truck involved him getting the engine replaced under warranty! |
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10-29-2019, 02:16 AM | #36 | |
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But I don't agree that I got "lucky". With this kind of luck I should be playing the tables in Vegas. The conclusion I draw here is that my previous V8 is more robust on a 4-3 mis-shift and it could just be because it has more rotating mass and therefore revs up slower. And the S55 is more fragile in particular situation.
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10-29-2019, 02:39 AM | #37 | |
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The problem is, we have a sample size of 1 for an S55 here. What piqued my interest was that the crank hub spun. It's not really the usual failure mode for other engines. I was hoping it might shed some light on why the crank hub spins on S55 in the first place. |
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10-29-2019, 04:55 AM | #38 |
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Needs more of this...LOL
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10-29-2019, 03:12 PM | #40 | |
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I often just use finger tips for 3rd to 4th. If you dont slam gears the box won't let you moneyshift as the syncros will never get the input shaft up to enough speed for an normal shift force to work. Take it easy, let the box do its job and enjoy the shifting... |
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10-29-2019, 09:59 PM | #41 |
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Yup, mine did too. Man I miss my my ‘05.
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10-29-2019, 10:10 PM | #42 |
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Lock outs as other members mention, definitely exist. Typically they are solenoids that prevent access to first gear until certain conditions are met. Same technology in a more nefarious application is the dreaded GM Skip Shift feature. It wouldn’t allow you to access 2nd and 3rd gears unless you got on the throttle pretty hard and are above a certain speed. I know this is STILL a feature on Corvettes. Guess the DCT in the C8 solves that problem though...
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10-29-2019, 10:18 PM | #43 | |
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10-29-2019, 11:17 PM | #44 | ||
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They aren't hard lockouts, they just give you so much resistance that, short of having mom lifting a car off baby strength, they are basically impossible to shift through. The only real "hard" lock outs I know of are the reverse gears, especially in a 5 speed configuration.
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