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Tracking / Autocross / HPDE / Drifting What these cars were built for! |
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08-16-2023, 04:54 PM | #43 |
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Not a comment against FA24 reliability, but regarding the comment above I’ve been to Lotus track days for many years and yet to see an engine fail. They literally live for the track.
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08-16-2023, 06:06 PM | #44 | ||
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Not to mention BMW. 911s are wonderful because if the motor blows and the rears lock up then the car slams back first into the barrier and your track insurance takes care of the rebuild.
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08-17-2023, 09:30 AM | #45 | |
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I'm genuinely curious and open to learn. After a few years and slowly improving results, I'd like to think I'm starting to crack into the "intermediate autoxer" category. |
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08-17-2023, 09:59 AM | #46 |
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We had an Elise engine with rod knock on Sunday at Palmer. Apparently operator error though, he ran it low on oil!
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08-17-2023, 09:09 PM | #47 | |
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08-17-2023, 11:43 PM | #48 | |
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08-21-2023, 06:55 AM | #49 | |
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Even with the FA20? I've hit the rev limiter a few times during autocross or track and it feels very "soft" on this car. I don't know how to describe it but I assume it's something with how Subaru tuned it. |
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08-21-2023, 08:07 AM | #50 | |
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I popped a rocker when I went to FI (and thus completely naded the engine), but I blame it on the 3-4 years of National AutoX rev'ing to 8k all the time. Engine had 35k miles on it
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08-24-2023, 11:41 AM | #51 |
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It pains me inside to hold at the rev limiter on some courses ~2 seconds. That's about the limit for just holding it vs going to 3rd. Sometimes it's not worth it to do the upshift and subsequent downshift. In fact, you could argue that in an autocross situation where you might not be rev matching 100% correctly, you're then putting strain on the transmission/syncros. But hey, I guess all autocross is strain and wearing out parts, isn't it?
I've mentally found myself backing off at the limiter and not just holding my foot flat to the floor, but this loses you time and with autox and being competitive, that can be tenths pretty easily. At heart, I'm too nice to my cars. I'll put longevity and wear above time a lot. I know most people I run with don't give to craps about it and will be trading the car in 2 years later, so they don't care at all. I get the "limiter is there for a reason and you can be on it all day with no problems. It was designed like that" argument all the time.
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08-24-2023, 11:46 AM | #52 | |
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In other cars with a hard limiter, usually cable driven throttles, the limiter cuts fuel and other weird things. End of the day, being at 7500 RPM for extended amounts of time can't be good in the long run. Yes, they're designed to hit those revolutions/speeds, but only temporary. Where as on the complete opposite spectrum, anywhere up to about 5k, you can pretty much stay at all day long with zero issues. Think about cruising at 3-4k on the highway for hours. Totally normal. ... and then double that. It's not just doubling heat and wear for ~2 seconds. It probably goes exponentially up.
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08-24-2023, 12:47 PM | #53 | |
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Double clutching is for matching gear speeds when down shifting. You push the clutch in, briefly take the car out of gear, let the clutch out, rev the engine to match the lower gear speed, push the clutch back in and down shift. This was a critical skill before the car gods invented synchronizers. Typically rev-matching (Heel/toe: a skill at which I suck) refers to matching the engine speed to the drivetrain speed after downshifting and before you let the clutch out. there by not upsetting the car. Cars can be like girlfriends, we don't want them upset. |
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08-24-2023, 01:10 PM | #54 | |
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I think it's more important to be rev matched at least slightly close to get back into 2nd, usually heading into a corner or mid-corner. I know a lot of people don't and just slip the clutch. That adds more clutch wear over the long term and can upset the car if you're totally out of whack with revs/speed. Could just be me, but I've always felt getting into a gear at a "weird" speed doesn't feel right. I'm not sure of the mechanics behind it given at the point the clutch isn't in play. For example, getting into first at anything over 5mph seems to be hard-ish. At 10mph, good luck. Other gears seem to sometimes do that too. Could just be me though. I'd assume it's the syncros having to do more work to snync things up, but without the clutch connecting the two, theoretically there shouldn't be any issues with wheel speed, right? Someone enlighten us.
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08-24-2023, 01:20 PM | #55 | |
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08-24-2023, 01:32 PM | #56 | |
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GRANNY SHIFTIN, NOT DOUBLE CLUTCHIN LIKE YA SHOULD
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