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CVTs have a pretty bad rap. Formula 500 uses them and they look like pretty fun cars. Larger forms of Motorsport should mandate them, reprogram our lizard brains to associate fast cars with them. https://www.youtube.com/watch?v=5VwbOv9lRTM um excuse me fucked around with this message at 20:34 on Mar 13, 2019 |
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Mar 13, 2019 20:29
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um excuse me posted:CVTs have a pretty bad rap. Formula 500 uses them and they look like pretty fun cars. Larger forms of Motorsport should mandate them, reprogram our lizard brains to associate fast cars with them. that looks fun as hell.
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Mar 13, 2019 20:36
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They track race in the actual series. The autocross is more of a demonstration that just because it doesn't make traditionally exciting noises, doesn't mean it can't be stupidly fun to do. F500 is a very cheap series to get into if you want to find an open wheel ride to rip around in. I wouldn't be surprised if it was cheaper than Formula Vee.
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Mar 13, 2019 20:45
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um excuse me posted:CVTs have a pretty bad rap. Formula 500 uses them and they look like pretty fun cars. Larger forms of Motorsport should mandate them, reprogram our lizard brains to associate fast cars with them. Their implementation in production cars was really poor and the confusion of new maintenance items led to a lot of reliability issues when people would use ATF in them. I'm warming to them because I know how good they can be and some are surprisingly fun, but most CVT's on the market are still boring as hell
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Mar 13, 2019 20:45
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That's... not a usual failure mode.
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Mar 13, 2019 21:31
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n0tqu1tesane posted:I did this to a cheap masonry bit recently. Where have I seen this before?  
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Mar 13, 2019 23:08
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the future of manual transmissions is a manual CVT where they give you a little lever to change the gear ratio yourself. for enthusiasts
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Mar 14, 2019 05:29
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A lot of cvts have paddles so you can pick preset ratios and will fake shifts.
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Mar 14, 2019 05:33
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Those cunts aren't taking away my clutch pedal no way no how.
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Mar 14, 2019 05:54
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stranger danger posted:the future of manual transmissions is a manual CVT where they give you a little lever to change the gear ratio yourself. for enthusiasts It'd be a lot better than the idiotic ones that pretend to be a normal automatic at least.
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Mar 14, 2019 05:56
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It'd be gimmicky and IDK if it would stand the test of time but I'd give it a test drive. Honestly CVTs aren't that bad (for commuting) if you have a smooth driving style. They do suck at low speeds though.
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Mar 14, 2019 06:16
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stranger danger posted:the future of manual transmissions is a manual CVT where they give you a little lever to change the gear ratio yourself. for enthusiasts Hey if you're gonna do all that ya gotta bring back the ignition advance lever from the Model T
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Mar 14, 2019 06:23
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stranger danger posted:It'd be gimmicky and IDK if it would stand the test of time but I'd give it a test drive. I've had occasion to drive my mom's Forester with a CVT, it seems as good or better than most modern manuals I've driven.
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Mar 14, 2019 06:25
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It hit 54 degrees here today, so looking to switch out my winter tires in another couple weeks. Decided to take a look at the wheel I slapped with a curb back in November - the face is gouged to hell, but the tire is still sitting at 32 psi so I figure things can't be that bad. Could the wheel still be OK? I did feel a wobble in the 100 feet I drove between the hit and the rollback truck, could have just been the bent control arm... https://i.imgur.com/BVqtrXI.mp4 Nope she's a goner. 
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Mar 14, 2019 07:59
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Krakkles posted:Totally a valid opinion, but why? I've only ever experienced it in rental cars (I.e., low end, prius, GMs, etc.) and it's never been a bother to me, and I'm curious why it bothers others. Stopping the engine is cool and good in hybrids because they have big electric motors to pull away from the stop while the ICE turns over. It’s annoying in every non-hybrid I’ve driven that had it. I’ll tolerate it for cleaner air, but the delay annoys me every time.
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Mar 14, 2019 10:03
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There's no general judgement on start stop being good or bad, it depends on implementation. If you already have a hybrid and you roll start the engine at least and you have some kind of traction battery, it's good. If you micro hybrid a classic single motor powertrain with a start stop and a 12v battery you generally make things worse due increased battery degradation, starter degradation and wear on the crankshaft. Theres some middle ground with mild hybrids, 48v systems and belt driven starter generators but that's a case by case one too. Also if you have a manual and it's not freezing cold, start without engaging the clutch to prevent starting on a loaded and dry thrust bearing. This option obviously falls flat with automated start stops. Combat Theory fucked around with this message at 11:23 on Mar 14, 2019 |
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Mar 14, 2019 11:18
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Platystemon posted:It’s annoying in every non-hybrid I’ve driven that had it. I’ll tolerate it for cleaner air, but the delay annoys me every time.
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Mar 14, 2019 13:08
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Platystemon posted:Stopping the engine is cool and good in hybrids because they have big electric motors to pull away from the stop while the ICE turns over. I drive a 2006 Civic Hybrid. It restarts the engine as soon as you lift off the brake, making the whole process pretty much seamless.
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Mar 14, 2019 17:14
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Yeah, and most of the cars I've driven where it's not an issue, that's exactly the case as well - actually, you don't even have to come all the way off the brake, just lift slightly. Again, it's an implementation or design issue. It's fine when it's well-designed (well, from a usability standpoint - the other points brought up about wear and tear, I have no idea), it suuuuuuucks when it's not.
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Mar 14, 2019 17:22
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Combat Theory posted:
Uhhhhhhh What?
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Mar 14, 2019 17:52
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Krakkles posted:Also, that’s a Ford Excursion. more of a wheel excursion
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Mar 14, 2019 18:19
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0toShifty posted:Hey if you're gonna do all that ya gotta bring back the ignition advance lever from the Model T Model A has a spark advance lever too! Also retains the steering column throttle, but it's linked to a normal gas pedal on the floor.
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Mar 14, 2019 18:38
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I often wonder if Ford would crank out a new Excursion how it would do. I think it would make a killing. But perhaps stretched Expedition fills enough need.
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Mar 14, 2019 18:40
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C-Bangin' it 
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Colostomy Bag posted:I often wonder if Ford would crank out a new Excursion how it would do. I think it would make a killing. But perhaps stretched Expedition fills enough need. The Expedition EL is basically the new Excursion. It's longer and larger than a normal Expedition.
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Mar 14, 2019 19:10
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Krakkles posted:Yeah, that may be an implementation or specific issue - the ones I've driven are all started and running before I push the gas. And I say this as someone who tends to aggressively accelerate. My wife had a 2012 Jetta for a while with the laziest DBW. I could jab the throttle all the way to the floor and up and the car wouldn't respond. I never got used to it and abhorred trying to drive it quickly. My '82 911 has a mechanical linkage all the way to the throttle, no cables, and it is an absolute joy to play with--it's like it reads my mind.
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Mar 14, 2019 19:41
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IMO the style of DBW used by BMW (VANOS) are probably the best in terms of response since the throttle is always at WOT and its actually regulated by varying the valve lift. iirc Merc also does this. (yes I know VANOS failures are a right loving pain in the rear end)
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Mar 14, 2019 21:00
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Combat Theory posted:Also if you have a manual and it's not freezing cold, start without engaging the clutch to prevent starting on a loaded and dry thrust bearing. This option obviously falls flat with automated start stops.
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Mar 15, 2019 00:22
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slidebite posted:Do you think release bearings are lubricated by the engine? Thrust bearings are inside the block, so yes. This is a thing done on race cars with stiff clutches as well. I doubt it matters with OEM parts.
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Mar 15, 2019 00:28
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Insert crankwalk picture here
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Mar 15, 2019 00:30
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Rigged Death Trap posted:IMO the style of DBW used by BMW (VANOS) are probably the best in terms of response since the throttle is always at WOT and its actually regulated by varying the valve lift. iirc Merc also does this. Valvetronic. VANOS is variable cam phasing, valvetronic is variable lift.
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Mar 15, 2019 00:56
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FatCow posted:Thrust bearings are inside the block, so yes. I got in so many arguments trying to prevent people who needed a clutch from buying the clutch their pipe dream yet to be built car might need. gently caress whoever came up with the whole "stage 3" thing.
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Mar 15, 2019 01:17
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When I was younger and dumber, I swapped a ZC into a ‘91 Civic Si. Since I had this new hot poo poo 128hp/106lb-ft engine, I had to (and did) get what was, I think, a stage 2 clutch. Not the full puck design, but much heavier than normal. Now I have 350lb-ft and the stock clutch holds it fine, thanks. Different car
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Mar 15, 2019 02:53
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Rigged Death Trap posted:IMO the style of DBW used by BMW (VANOS) are probably the best in terms of response since the throttle is always at WOT and its actually regulated by varying the valve lift. iirc Merc also does this. VANOS (VAriable NOcken wellen Stuerung) is the variable cam timing system and does not affect lift. It is capable of phasing the intake / exhaust cams (for any dual VANOS anyway) +/- significant degrees relative to TDC, but it cannot affect valve lift or duration. It's used to move the torque curve at a given RPM, which does have some impact on throttle response but maybe not for the reason you're thinking. e: and it definitely doesn't keep the throttle wide-open at all times. So yeah, definitely not for the reason you're thinking.
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Mar 15, 2019 03:03
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BMW does do what he's thinking of, he just got the wrong name. It's Valvetronic, not VANOS.
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Mar 15, 2019 03:31
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Yup. I was wrong, its Valvetronic. But every DBW car Ive driven that uses that method has been miles better than others doing it solely by an actuated throttle body. Granted though theyve either been manual or have their throttle response raised to razor edge precision when put into manual gear selection. Variable valve control is the good poo poo Rigged Death Trap fucked around with this message at 12:18 on Mar 15, 2019 |
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Mar 15, 2019 12:15
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Rigged Death Trap posted:Variable valve control is the good poo poo I cannot wait to drive something with Freevalve, or something like it. Why yes, I'd like my Gen 9 small block to idle like a smog-cam 7.5:1 454, but have three-quarters of an inch of lift and 265° duration above 4000rpm, please. 
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Mar 15, 2019 15:58
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MrYenko posted:I cannot wait to drive something with Freevalve, or something like it. Why yes, I'd like my Gen 9 small block to idle like a smog-cam 7.5:1 454, but have three-quarters of an inch of lift and 265° duration above 4000rpm, please. I mean at that point, if you're idling for any amount of time you have further you can go.
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Mar 15, 2019 17:09
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Combat Theory posted:Also if you have a manual and it's not freezing cold, start without engaging the clutch to prevent starting on a loaded and dry thrust bearing. My car has a switch on the pedal and won't even start unless I have the clutch pressed in.
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Mar 15, 2019 20:12
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MrYenko posted:I cannot wait to drive something with Freevalve, or something like it. Why yes, I'd like my Gen 9 small block to idle like a smog-cam 7.5:1 454, but have three-quarters of an inch of lift and 265° duration above 4000rpm, please. Freevalve is not a feasible technology. For a mechanically disconnected valvetrain to be efficient enough to overcome the conversion losses it has to be either be pneumatically or hydraulically fired. As you might be able to guess those options aren't financially viable. I did research into this about a decade ago.
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Mar 15, 2019 20:21
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um excuse me posted:Freevalve is not a feasible technology. For a mechanically disconnected valvetrain to be efficient enough to overcome the conversion losses it has to be either be pneumatically or hydraulically fired. As you might be able to guess those options aren't financially viable. I did research into this about a decade ago. Well look what we have here everyone, someone that rains on our parade and dreams by introducing laws of thermal-dyamics.
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Mar 15, 2019 20:27
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