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Tracking / Autocross / HPDE / Drifting What these cars were built for! |
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05-31-2022, 10:24 AM | #43 | |
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But as you say, there are certainly regional variations. Miatas in TX are strong because we don't have rust problems and 30 yr old cars are still plentiful. We also have many national champions and race shops here that specialize in them since they came out, so the chassis is well supported. There are several tuners that support the 86 platform in TX, but there is only one race shop that actively supports them at the track (at this time.....) |
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05-31-2022, 11:14 AM | #44 | |
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I did want to make just one point about spec racing in general; I'd warn against using it to suggest the prevalence of track vehicles because it might seem bigger than it really is by virtue of it (mostly) being the same vehicles at all the events. I mean, if one looked at spec racing local to me a few years ago, one might think the most prevalent make/model of track going car would have been the Nissan Micra. No joke. |
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05-31-2022, 01:13 PM | #45 | |
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and yes, parts are getting harder to find for the NA and NB Miata chassis, but the aftermarket is stepping up and the rules are evolving to allow aftermarket substitutions. for that example, they just updated the ruleset to run a spec Penske shock in the class over the Bilsteins they've been using for 20 years. Spec Miata is also the most active class in the club, which is a hard number that cannot be discounted. 2022 cumulative totals are at 3157 total entries for the year so far, and 514 of those entries are in spec Miata, accounting for 16% of the total participation in the club. https://www.scca.com/pages/majors-participation-2 In 2021, there were 5777 total race entries, 791 of which were SM (13.7%). https://www.crbscca.com/staffAdmin/p...p?theYear=2021 Miata are also allowed in at least 10 other classes that I can think of off-hand, but the stats immediately available don't break down total participation by make. (I'm not going to spend 2hrs digging through race results and tabulating what I can see at the race track to make point on an interweb argument.) The point is, while the FRS is becoming more popular, it's not going to replace the Miata in US based club racing anytime soon. There is still significant support and there will be for another decade. Maybe Subaru will have figured out how to build a boxer engine that doesn't have oiling problems by then. |
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05-31-2022, 09:53 PM | #46 |
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Has anybody blown a 2nd gen engine yet? I'd be curious about oil analysis now that some folks have had them on the track a few times.
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06-08-2022, 08:50 AM | #48 |
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We lost one (2015) at the track at Palmer MA the other day. FWIW *with* oil cooler. Driver says he's gonna get a new Subaru shortblock, they're available for $2k!
My opinion: FA20 is marginal on oil delivery to some of the rod bearings to begin with, and oil pressure falls off at high rpm (cavitation?). IMO maybe 1% of engines with machining tolerances at the "bad end" for oil delivery to critical bearings are just not gonna have a long life regardless of how well maintained. Maybe bump that up to 10% of engines that see a lot of track usage. Last edited by ZDan; 06-08-2022 at 10:36 AM. |
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06-08-2022, 10:27 AM | #49 |
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FA20 or FA24?
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06-08-2022, 10:36 AM | #50 |
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06-08-2022, 10:53 AM | #51 |
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I "think" i have read that the FA24 does not suffer from oil pressure issues even with high oil temp like the FA20 did. As such, i think they could be more reliable for track use?
However, please do not quote me as i can't recall where i read that.
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06-08-2022, 11:22 AM | #52 | |
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We have upstream issues with oiling on the FA as well, pickup tube size and ect. Edit: added corrections.
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Last edited by NoHaveMSG; 06-08-2022 at 11:43 AM. |
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06-08-2022, 11:39 AM | #53 | |
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https://www.ft86club.com/forums/showthread.php?t=149512
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06-08-2022, 11:40 AM | #54 |
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Mike you mean FA24 and not 2017+ shortblock right? was this during product development or testing the limits on a dyno? did they fail on the rod/bearing or did the failures look different from FA20
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06-08-2022, 12:36 PM | #55 | |
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06-08-2022, 12:56 PM | #56 | |
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Are you on an element block? I have my suspicions on a couple things they do. I need to figure something out before I start spinning 8k rpm.
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