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That's some dedication to saving a head. I wonder if he weighted the cost in time vs the cost of just buying a new head.
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Nov 17, 2016 17:43
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I looked into that the last time it was posted, and it was a promod cylinder head worth about $15,000, so yeah it was worth the labour to fix it, and it's a pretty regular thing to do.
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Nov 17, 2016 17:50
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It's like the machine shop version of those Russian bodyshop forums.
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Nov 17, 2016 18:01
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The original combustion chamber doesn't seem like it was perfectly round and hemispherical, and most modern ones are not, but the "new" one seems to be?
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Nov 17, 2016 18:11
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CAT INTERCEPTOR posted:https://www.facebook.com/marcus.dunn.545/videos/vb.530344574/10154810413149575/?type=2&theater  the mid 80's really was a golden age in rally history. That S1 is an all time favorite car.
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Nov 17, 2016 18:44
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I desperately want this to be successful. Edit: Oh, good.
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Nov 17, 2016 19:03
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Drivetrain Nerdgasm Alert! https://www.youtube.com/watch?v=glf_k4qGBAA
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Nov 18, 2016 00:30
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CharlesM posted:Mazda unveiled a new Daytona Prototype (IMSA DPi) called the RT24-P.
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Nov 18, 2016 01:31
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Artemis J Brassnuts posted:How on earth can you get 600 hp out of a 2-liter, 4 cyl engine? Like, I'm seriously curious... and it's going to last a whole 24 hours at LeMons? Being turbo makes it a lot easier.
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Nov 18, 2016 01:49
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Artemis J Brassnuts posted:How on earth can you get 600 hp out of a 2-liter, 4 cyl engine? Like, I'm seriously curious... and it's going to last a whole 24 hours at LeMons? Boost? And no, but it will last a whole 24 hours at Daytona.
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Nov 18, 2016 01:51
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Artemis J Brassnuts posted:How on earth can you get 600 hp out of a 2-liter, 4 cyl engine? Like, I'm seriously curious... and it's going to last a whole 24 hours at LeMons? BMW got 1000 hp out of a 1.6? liter 4 cyl. But that was using a lot of boost and exotic fuel.
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Nov 18, 2016 01:58
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There are 2000hp 4G63s on methanol. The TS050 LMP1 car toyota is running this year is a 989hp 2.4l V6tt and those are supposed to last 24 hours or halfway through a tire wall, whichever comes first.
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Nov 18, 2016 02:14
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Artemis J Brassnuts posted:How on earth can you get 600 hp out of a 2-liter, 4 cyl engine? Like, I'm seriously curious... and it's going to last a whole 24 hours at LeMons? Nissan was getting 400hp out of a 1.5l 3-cylinder, so just hang another 500cc pot off that and... uhhh... I don't think I did the math right.
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Nov 18, 2016 02:38
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poo poo, most bike manufacturers are selling liter bikes making 200hp with a full warranty, Kawasaki sells a supercharged 998cc bike that makes >300hp stock. As in not hand grenades.
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Nov 18, 2016 02:45
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Powershift posted:There are 2000hp 4G63s on methanol. Or the turbo blows up, ya know 
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Nov 18, 2016 02:55
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BlackMK4 posted:poo poo, most bike manufacturers are selling liter bikes making 200hp with a full warranty, Kawasaki sells a supercharged 998cc bike that makes >300hp stock. As in not hand grenades. 200hp NA, at that. Granted you could never get away with the maintenance interval in a car 
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Nov 18, 2016 03:07
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The poo poo you can do with weld/machine is pretty goddamn incredible. My company manufactures and refurbishes injection molds, and we get some back that are 20 years old and the steel is loving swiss cheese. Machine out the rot, fill with weld, machine and grind back to flatness and it's good to punch out another billion preforms.
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Nov 18, 2016 03:24
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Dr.Smasher posted:BMW got 1000 hp out of a 1.6? liter 4 cyl. But that was using a lot of boost and exotic fuel. 1.5L  https://en.wikipedia.org/wiki/BMW_M12
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Nov 18, 2016 03:27
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MA-Horus posted:The poo poo you can do with weld/machine is pretty goddamn incredible. My company manufactures and refurbishes injection molds, and we get some back that are 20 years old and the steel is loving swiss cheese. Machine out the rot, fill with weld, machine and grind back to flatness and it's good to punch out another billion preforms. I work for a company that does heavy equipment manufacturing. Every time the machine shop fucks up a steel piece (as long as it's not some sort of fancy alloy or heat treated), we send it to be welded up and remachined. Pretty common process.
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Nov 18, 2016 03:39
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Speaking of heavily welded heads, here's an interesting one. http://www.topplocksverkstan.se/volvo16vrc.html The original turbo years of F1 were awesome. Yes, there's the BMW I4 but it was nearly undriveable. The purpose designed V6s though, like the TAG Porsche, the Renault, the Cosworth (though it never got put in a good car) and especially the Honda... the BMW was scraping 1100 to 1400 in qualifying and then being junked, while the V6 cars were making an honest 1000hp for the full race distance, at least before '88 when they cut the boost pressure and limited fuel consumption.
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Nov 18, 2016 03:57
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Ep 1 of the Grant Tour is live on Prime Video now. It's great. Hooray!
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Nov 18, 2016 04:43
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GnarlyCharlie4u posted:Drivetrain Nerdgasm Alert! "We can spin the tires up through 170mph in the dry." 
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Nov 18, 2016 05:46
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Well the thing does have fourteen hundred loving horsepower
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Nov 18, 2016 06:00
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Sagebrush posted:Well the thing does have fourteen hundred loving horsepower Plus the other 500 from the rear direct drive electric motors
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Nov 18, 2016 06:40
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HandlingByJebus posted:Ep 1 of the Grant Tour is live on Prime Video now. What an awesome intro. I subscribed to Prime this week just for this show.
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Nov 18, 2016 07:43
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Theyre finally using freevalve God yes
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Nov 18, 2016 08:05
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GnarlyCharlie4u posted:Drivetrain Nerdgasm Alert! That man is seriously amazing. The tech they put into their cars is just absurdly phenomenal 
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Nov 18, 2016 08:30
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Artemis J Brassnuts posted:How on earth can you get 600 hp out of a 2-liter, 4 cyl engine? Like, I'm seriously curious... and it's going to last a whole 24 hours at LeMons? I looked up how F1 engines make 900+ hp out of 2L V6s (I think those are the specs) and the answer seems to be boost, lightweight everything, extra lightweight/extra expensive materials used for rotating & reciprocating parts, dinky piston heads, and wider bores/shorter strokes than your average 2L. Then take into account that the engine only needs to last one season and that each team has multiple engines to split the workload.
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Nov 18, 2016 08:57
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stranger danger posted:I looked up how F1 engines make 900+ hp out of 2L V6s (I think those are the specs) and the answer seems to be boost, lightweight everything, extra lightweight/extra expensive materials used for rotating & reciprocating parts, dinky piston heads, and wider bores/shorter strokes than your average 2L. Then take into account that the engine only needs to last one season and that each team has multiple engines to split the workload. Currently formula is 1.6L turbo 6-cylinder engines making about 800-900HP then have an electric boost.
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Nov 18, 2016 13:09
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Nov 18, 2016 13:55
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Sure, but shortly after this photo was taken, it was towed away because the driver couldn't get it out of first gear.
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Nov 18, 2016 14:43
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stranger danger posted:I looked up how F1 engines make 900+ hp out of 2L V6s (I think those are the specs) and the answer seems to be boost, lightweight everything, extra lightweight/extra expensive materials used for rotating & reciprocating parts, dinky piston heads, and wider bores/shorter strokes than your average 2L. Then take into account that the engine only needs to last one season and that each team has multiple engines to split the workload. Being able to rev into the stratosphere helps too.
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Nov 18, 2016 15:42
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The current regulation limits power by fuel flow - and it's actually about 750ish on the IC engine and then electric boost. It's a technically cool regulation because it's directly driving better efficiency - the only way to make more power is to better use the fuel you're allowed, whether through efficient engines or better recovery of the exhaust heat. But it also means there's not as much incentive to rev the things really hard because, well, friction.
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Nov 18, 2016 15:50
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stranger danger posted:I looked up how F1 engines make 900+ hp out of 2L V6s (I think those are the specs) and the answer seems to be boost, lightweight everything, extra lightweight/extra expensive materials used for rotating & reciprocating parts, dinky piston heads, and wider bores/shorter strokes than your average 2L. Then take into account that the engine only needs to last one season and that each team has multiple engines to split the workload. Also F1 engines have to last multiple races. You only get a hand full of engine changes a season or you get grid penalties if you go over your allotment.
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Nov 18, 2016 18:46
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Which triggered an amusing loophole this year, Mercedes saved up a bunch of part swaps and did everything at once because the grid place penalties only apply to one race. So you can rack up 100 grid penalties over night and it only hurts you for a single race. Not quite as interesting a cheat as filling a tube frame with gas but there isn't much wiggle room in F1 anymore. (the loophole was closed too, but only after Mercedes benefited from it)
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Nov 18, 2016 18:53
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Alonso got a 45 place penalty for parts swaps, it's just stupid what the sport has turned into.
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Nov 18, 2016 19:52
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Yeah F1 is often a snoozefest then you unexpectedly get something like Verstappen going balls out in the rain and reminding you why it's so awesome and you're hooked for another year.
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Nov 18, 2016 20:04
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http://i.imgur.com/idzMn3K.mp4
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Nov 19, 2016 06:38
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...did they feed a car through a manure spreader? ...can you do that?
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Nov 19, 2016 06:42
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Why does that machine have that much power? Is it really that hard to shred poo poo?
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Nov 19, 2016 06:44
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