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With a new filter in there, it builds up a small film of ice on the pipes, and melts off repeatedly, and cycles like this every half hour or so. Isn't that the way it's supposed to work?
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Jul 24, 2012 23:17
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Motronic posted:The big benefit of an expansion valve as a phase change device is that the window of acceptable feed pressures (therefore refrigerant charges and compressor health) is much wider than a (fixed) capillary tube due to the fact that the expansion valve adjusts based on the temperature of the refrigerant leaving the evaporator to prevent it from dropping below freezing as well as making it more efficient when it does have sufficient charge. Yes. I would have typed pretty much that exact thing, but thermodynamics, The Rankine cycle, and refrigeration in general still mystify even the average AI goon. Glad to know I'm (still) not insane! Motronic posted:It in no way allows you to cheat physics and humidity by running the evaporator below freezing. I froze the poo poo out of the one in my Porsche last year after an AC repair when I was impatiently refilling the system too quickly on a 100 degree 90+% humidity day.  I know you're smarter than this, Motronic. Its why I like you. (Except when you did stupid poo poo and got banned those two times. The loathing only lasted a few days though.)  I didn't say it dipped below freezing for LONG... (The capillary tube to the cutoff switch takes finite time to transfer the temperature and move the bellows and lever and spring...) Plus there is the fact that the switch just kills the compressor. The high pressure side is still pressurized, so it continues to cool for a while until the entropy is equalized on both sides... (Either that or my 89 Wagovan truly is a miracle with "-OL" (My IR therm goes down to -4F)temps when pointed AT (Not into, IR doesn't work(With any accuracy.) like that...) the vent louvers with the A/C on after half an hour of driving...) Warning: The above post contains 250% of the RDI of nested parenthesis and ellipsis. For this we apologize and recommend a brain flush. Powershift posted:With a new filter in there, it builds up a small film of ice on the pipes, and melts off repeatedly, and cycles like this every half hour or so. Isn't that the way it's supposed to work? Yes. This is the A/C equivalent of the steak that has a trickle of blood running off the one edge and onto the blotter thing on the tray, you know its fresh and in good shape. Half hour? Should be cycling more like every 3-4 minutes, unless you're currently in one of the  states with nutty heatwaves. Protip: Set the bled door to recirc when running A/C (Leave it on fresh vent for like the first 5 minutes though, when the outside air is probably cooler than the sweat-box that is any parked car in the 2nd half of July.) for two reasons. First: This improves efficiency because the air going in to the evaporator assembly is cooler to begin with, and there is less overall latent heat to be removed. Second: It helps keep your system from getting that three day's out truckdriver-crotch smell because it's not being fed air with 95% Relative Humidity all the time...Edit: Every year I have the urge to start a "Cupholders? More like ice-cube trays! The AI A/C Megathread. Today's lucky number: 609." thread sometime in June, but, yeah...  Then July rolls around and there's already A/C chat in half a dozen threads... Sponge! fucked around with this message at 23:59 on Jul 24, 2012 |
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Jul 24, 2012 23:50
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 This photo doesn't properly show off how this truck was blowing out enough smoke to turn all six lanes of US60 into a white haze. Or the crazy old gently caress driving it and periodically looking out the back to see just how much smoke it was spewing. He was also doing 80 at the time. Sponge! posted:
What, like the one revmoo started in March?
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Jul 25, 2012 03:44
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 Great minds think alike?Also, smoke or not, just the fact that truck was doing 80 is terrifying. Actually, nm, its a chassis swap upon closer inspection. Not entirely as impressive then. Edit: vvvvvvvv Too blue for diesel I think. vvvvvvv Sponge! fucked around with this message at 03:56 on Jul 25, 2012 |
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Jul 25, 2012 03:49
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Sponge! posted:
My question: Was it diesel? And if it was, permission to pull him to the side of the road and starting beating his face in.
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Jul 25, 2012 03:51
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Sponge! posted:Also, smoke or not, just the fact that truck was doing 80 is terrifying. Even with a chassis swap (and just because they're Mustang wheels doesn't mean it's sitting on an actual Mustang platform, and not just something with hacked in Mustang bits) the body work was so terrible and barely held on that doing any speed in this must've been terrifying. I didn't see this because I was driving but according to my wife, the front end was held on with tie straps. CommieGIR posted:My question: Was it diesel? And if it was, permission to pull him to the side of the road and starting beating his face in. No idea if it was a diesel or not, and it looked to me like the smoke was billowing out from right up at the back of the engine / front of the transmission - you could see a good-sized jet coming down from there. My gut is either major fluid leak or extra-major exhaust leak, except I would think an exhaust leak like that would be insanely loud too.
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Jul 25, 2012 04:01
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IOwnCalculus posted:Even with a chassis swap (and just because they're Mustang wheels doesn't mean it's sitting on an actual Mustang platform, and not just something with hacked in Mustang bits) the body work was so terrible and barely held on that doing any speed in this must've been terrifying. I didn't see this because I was driving but according to my wife, the front end was held on with tie straps. Don't forget wicked-bad-blow-by(to use a cartalk phrase.) coming out everywhere! That is always a truly horrible mechanical failure. Pretty sure that body never expected to top 53, downhill, in a vacuum.
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Jul 25, 2012 04:06
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IOwnCalculus posted:No idea if it was a diesel or not, and it looked to me like the smoke was billowing out from right up at the back of the engine / front of the transmission - you could see a good-sized jet coming down from there. My gut is either major fluid leak or extra-major exhaust leak, except I would think an exhaust leak like that would be insanely loud too. I literally have had to take parts to show and tell people at work WHY you don't run diesels rich without a bigger turbo.... For some reason, smoker diesels are all the rage in Cheyenne, WY. I had to stop and help a guy with a Cummins who was scratching his head on the side of the road wondering why his engine stopped and wouldn't start anymore.... Turns out, he had it running rich and had coked up the valves so bad it lost compression. He said it had been getting harder to start for a while.
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Jul 25, 2012 04:11
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At the drags a couple of weeks ago. Decent launch, hit 2nd, THUMP. 
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Jul 25, 2012 09:21
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Thehit posted:At the drags a couple of weeks ago. Decent launch, hit 2nd, THUMP. Is that from the axle?
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Jul 25, 2012 17:33
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I thought it was a sun gear.
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Jul 25, 2012 18:42
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Thehit posted:At the drags a couple of weeks ago. Decent launch, hit 2nd, THUMP. Can you get better pics? I think its pretty neat that theres multiple failures as well as twisting/plastic deformation. My guess is an input/output shaft because of the long splines. Axles dont need very long of splines.
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Jul 25, 2012 18:48
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Is it a layshaft?
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Jul 25, 2012 19:14
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IOwnCalculus posted:No idea if it was a diesel or not, and it looked to me like the smoke was billowing out from right up at the back of the engine / front of the transmission - you could see a good-sized jet coming down from there. My gut is either major fluid leak or extra-major exhaust leak, except I would think an exhaust leak like that would be insanely loud too. My dad used to have a F250 work truck that had a 351 with an extremely leaky rear main seal that dripped right on the exhaust crossover. It looked like you describe.
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Jul 25, 2012 20:19
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Bad Angus! Bad!
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Jul 25, 2012 20:25
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That's a killer anti-theft system.
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Jul 25, 2012 20:54
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The lock on my mailbox did the same drat thing yesterday but apparently its $40 to get it replaced (wtf) so I think I'll be chancing someone digging through my mail for a while.
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Jul 25, 2012 21:16
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rscott posted:The lock on my mailbox did the same drat thing yesterday but apparently its $40 to get it replaced (wtf) so I think I'll be chancing someone digging through my mail for a while. Pretty sure community property poo poo like that is the HOA's responsibility?
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Jul 25, 2012 21:42
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At my last place the mailbox kiosk actually belonged to the Post Office, along with the keys.
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Jul 25, 2012 21:55
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Lord Gaga posted:Can you get better pics? I think its pretty neat that theres multiple failures as well as twisting/plastic deformation. My guess is an input/output shaft because of the long splines. Axles dont need very long of splines. I'll try and get some decent photos after work. It's the shaft that goes between the gearbox and the transfer case. Pretty common weak point in the Evo - second one I've done. Will be upgrading to a PPG billet one once the funds allow.
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Jul 26, 2012 00:45
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Thehit posted:I'll try and get some decent photos after work. It's the shaft that goes between the gearbox and the transfer case. Pretty common weak point in the Evo - second one I've done. Will be upgrading to a PPG billet one once the funds allow. So we can look forward to grenaded gearbox/tc pics next? You're just going to move the weakest link...
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Jul 26, 2012 01:14
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VW correct? I had a door that just STOPPED OPENING on my 1989 Jetta Diesel....we could NEVER get it open again. I shut it one day, and no matter what I tried, it would never open.
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Jul 26, 2012 03:44
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The door handle/opening/locking mechanism on that vintage VW had issues. My old Passat Also started acting up on the driver's door at one point, and after taking it apart I realized that it had more moving parts than a silo full of swiss watches.
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Jul 26, 2012 08:37
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Sponge! posted:So we can look forward to grenaded gearbox/tc pics next? You're just going to move the weakest link... Pretty much. Gearboxes are generally pretty solid at the power levels I plan on running. Quaife helical LSD is in the pipeline for the transfer case, should be good enough for 400-420 whp - besides, those come with a "lifetime warranty". I intend to get this car into the low 11s, maybe high 10s down the line, so I'll be spending a fair amount of money on drivetrain bits. At the moment with the power I have I need to be fairly brutal to run respectable times, hopefully onceI throw a bit more power at it I can be nicer to run the numbers I want. Waste of money probably, but meh, I enjoy it. Here's a better picture of the two I've gone through so far. 
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Jul 26, 2012 11:36
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Thehit posted:I'll try and get some decent photos after work. It's the shaft that goes between the gearbox and the transfer case. Pretty common weak point in the Evo - second one I've done. Will be upgrading to a PPG billet one once the funds allow. gently caress YEAH! Splitz and I spend an inordinate amount of time trying to figuring this out. That was my first guess before we settled on center diff input shaft. ALWAYS GO WITH YOUR GUT! We came across some fairly useless to us, but might be helpful to you, links: http://www.evoscan.com/manuals/Evo9/GR00000600-22C.pdf http://www.lilevo.com/mirage/EVO%208%20Service%20Manual/xEvo8/Evo8/Technical/02/Power%20Train.pdf http://www.lilevo.com/mirage/EVO%206%20Service%20Manual/E6/wsm/EV6_XE22b.pdf
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Jul 26, 2012 15:05
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Haha. I think my guess, your guess, and the actual answer are all the same part. Why is it hollow?  I mean, no wonder it's a weak point.
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Jul 26, 2012 15:15
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Splizwarf posted:Haha. I think my guess, your guess, and the actual answer are all the same part. Probably to be the weak point. If you're wrecking that thing on a normal daily driven car, something is seriously wrong. I could definitely see engineering it for failure so that the way more expensive gearbox and/or transfer case don't get lunched.
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Jul 26, 2012 15:42
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Splizwarf posted:Why is it hollow? Tubing is actually pretty god damned strong in terms of torque distortion... Drilling rig shaft is hollow... Wind turbine pylons are hollow...
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Jul 26, 2012 18:40
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Those are both cases where they're trying to save weight. I like the "intentional weak link" suggestion. I was more wondering if something went inside it.
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Jul 26, 2012 18:46
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Shear force increases as you go from the center to the edge so you can make a hollow shaft stronger and lighter without being much larger in diameter. Here's a broken rear transfer shaft from an STI:
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Jul 26, 2012 18:56
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The pony thread reminded me of a '72 Mustang I had many years ago. Looking back through pictures, I found a shot of the roof that looked like it was more Bondo than metal: It had originally been the "Grande" model which had a fake convertible skin on the roof, which trapped moisture and led to this kind of rusting. Of course, I didn't know this (and other severe rust) until after buying it. Last time I checked, shock towers were important structural components. The other side was just as bad.  And this little "oops" turned a "just replacing the gaskets and cleaning it up" into a full rebuild. It wasn't a large mechanical failure, but it sure was expensive.  The whole time I knew that I had no idea what I was doing, figured it would just work out, after all: "How hard could it be?" It never ran again, even after pouring a few grand into the engine compartment, and I moved and couldn't take it with me.
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Jul 26, 2012 20:28
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That's rust? Why, I think you could still unscrew that bolt!
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Jul 26, 2012 20:31
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Boat posted:Probably to be the weak point. If you're wrecking that thing on a normal daily driven car, something is seriously wrong. I could definitely see engineering it for failure so that the way more expensive gearbox and/or transfer case don't get lunched. I wouldn't really call it normal driving. That shaft has seen about 70 full on passes down the strip with me being not very nice to it. If I was driving it like I do on the street, I doubt I would ever break it with 270 whp. But I'd also probably be running 13s.
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Jul 26, 2012 20:52
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Thehit posted:I wouldn't really call it normal driving. That shaft has seen about 70 full on passes down the strip with me being not very nice to it. If I was driving it like I do on the street, I doubt I would ever break it with 270 whp. But I'd also probably be running 13s. That was his point. It's a weak point in the system, but it's still strong enough to hold up to almost any condition. And if someone does manage to break it, it's a lot better than a real internal trans/tc part.
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Jul 26, 2012 21:01
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IOwnCalculus posted:. Post more failures! Ive got one just like that out of my TBI 5.7....
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Jul 26, 2012 21:55
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kastein posted:That's rust? Why, I think you could still unscrew that bolt! Rust is just natures loctite! 
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Jul 27, 2012 11:33
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Having had so many gearbox issues with my old Evo I was always afraid to drag race it, so it seems alien to me when I see other people drag racing them.
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Jul 27, 2012 11:52
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Splizwarf posted:Haha. I think my guess, your guess, and the actual answer are all the same part. grover fucked around with this message at 14:19 on Jul 27, 2012 |
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Jul 27, 2012 14:12
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Check out this Hotchkis article for empirical validation that hollow swaybars are much lighter weight and almost as stiff as a solid swaybar of a similar diameter. http://www.hotchkis.net/_uploaded_files/hollow_vs_solidinstructions162file.pdf quote:Okay, lets illustrate the tire example. Let’s say,
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Jul 27, 2012 15:27
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Ferremit posted:Rust is just natures loctite! I need to mount this on a plaque in my garage.
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Jul 27, 2012 15:51
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