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I see an Oregon plate on the 360 but Cali plates on the others - can I count you amongst the elite PacNW AIers or are you a Caligoon? (Judging by the landscape in the outdoor pics; I'm guessing the latter, but you never know).
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Jun 4, 2015 07:45
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| # ? Apr 28, 2024 19:16 |
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We're in NorCal. The car was purchased in Oregon, because Portland, of course. The coworker travels up to Seattle pretty regularly for work though, and I'll probably be up there at some point too. Would be fun to meet some PacNWers.
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Jun 4, 2015 07:49
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Are you concerned about all those extra horses making things hotter under there? Like, will the cooling be adequate, or do you need to get fans or something And how are you measuring engine temperature (if you've explained this already I apologize)?
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Jun 4, 2015 08:04
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I haven't had a chance to post up the electrical wiring pictures and all that jazz, but I'll try and handle that this weekend. The extra horses will definitely make things run hotter. The factory fan is enormous and flows a huge amount of air through the squirrel cage layout they use, but we may end up strapping on some extra cooling fans to the bottom of the engine bay to try and force some more cooling air through there if necessary. Right now we're using exhaust air temp from the cooling routing as our "coolant" temperature for the purposes of engine warmup enrichment and it seems to do quite well. We'll probably end up jamming a K-type into the cylinder head at some point to get a better measure of CHT. Another person who has converted his 360 to EFI did that to keep tabs on everything. We're also probably going to get an EGT bung welded into the exhaust to measure exhaust temps for our tuning. That can wait until we're ready to start adjusting ignition timing, though.
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Jun 4, 2015 08:10
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Steak Flavored Gum posted:I haven't had a chance to post up the electrical wiring pictures and all that jazz, but I'll try and handle that this weekend. This project is awesome. Are you guys planning on doing anything else after the EFI is complete? Is there any more restoration that needs to be done?
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Jun 4, 2015 13:41
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https://www.youtube.com/watch?v=CtV95U1Mat0 We have not yet doubled the juice.  I suspect that 1. the throttle is not opening fully with the pedal planted and 2. ignition control will make a huge difference in performance.
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Jun 8, 2015 08:18
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so will editing your videos so that horrific wind noise doesn't drown everything out jesus loving christ
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Jun 8, 2015 08:41
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you're going to find a TON of power in ignition timing. I can't wait for the results. Did you pick up the 2 stroke tuning books yet?
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Jun 8, 2015 08:41
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Does it have any kind of expansion chamber setup at all?
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Jun 8, 2015 08:44
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rscott posted:so will editing your videos so that horrific wind noise doesn't drown everything out jesus loving christ If you weren't hearing the horrific wind noise you'd be hearing the horrific volume of the engine or the horrifically bad commentary we have for the car's performance. DWI. Nerobro posted:you're going to find a TON of power in ignition timing. I can't wait for the results. I too cannot wait. We're ordering the coils this week to set it up for coil-near-plug. I grabbed pretty much all the 2-stroke books I could find. Tuning 2-strokes is a whole lot of voodoo, apparently. I have a feeling that dyno tuning is really the only surefire way to improve things, although it'll be pretty easy to tell if we're freeing up power on top speed runs! Slavvy posted:Does it have any kind of expansion chamber setup at all? Nope. I guess another 360 owner has made them and has them for sale, but they are ridiculously loud even with mufflers and I'm really not sure that that's a road worth looking down. The power band would be absurdly restrictive, even worse than it is now. Making reed valve cages would be a much better path forward for keeping the car "streetable."
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Jun 8, 2015 08:55
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I think your top speed issues may be from your doofus copilot hanging his arm out the window, that wind drag must add up to at least a few tenths of a horsepower This thing is awesome and I really want to see it when I am out there in... wow, like 2 months. Time flies.
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Jun 8, 2015 12:20
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I'm the doofus copilot!
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Jun 8, 2015 17:37
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Steak Flavored Gum posted:Nope. I guess another 360 owner has made them and has them for sale, but they are ridiculously loud even with mufflers and I'm really not sure that that's a road worth looking down. The power band would be absurdly restrictive, even worse than it is now. Making reed valve cages would be a much better path forward for keeping the car "streetable." There's no real magic in tuning 2 strokes. But there's a whole lot of math. Tuned pipes can be tuned to have broad powerbands, with long closure cones on them. It makes them less peaky, so you get less peak horsepower, but it's always better than a big muffler. Since tuned pipes depend on air temprature to control what frequency they're resonant at, you can use ignition and fueling to adjust the active frequency range of the tuned pipe. By leaning the fuel out at low rpm, you can have cooler exhaust going into the pipe, making it work at lower rpm. At the high end, shifting the ignition event later, and enrichening the mixture allows still burning fuel to go out the exhaust, raising the temperature of the tuned pipe, and making the pipe resonante at higher frequencies. Tuned pipes can be quiet, it's just nobody ever "does" it. You still need a muffler sized for a 180cc for each cylinder, on top of the tuned pipe. most of the time people put on a muffler that seems "the right size" for the stinger on the end of the tuned pipe. That's definitely not the right size. And now come the crazy ideas... For inshore powerboat racing, variable length tuned pipes are a common thing. They also have been done on gokarts. You've got an electronic controller, there's no good reason you couldn't have that drive a servo and have VTEC YO! on your mazda. While we're on that subject.. Honda's powervalve implementation can be done purely as part of the exhaust system. Honda uses a chamber at the start of the exhaust to delay the exhaust pulse and bring the exhaust tuning lower down.
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Jun 8, 2015 18:24
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Steak Flavored Gum posted:I'm the doofus copilot! Then cool it with the five-finger active aero you got going there
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Jun 9, 2015 01:55
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So much downforce!
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Jun 9, 2015 02:19
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On the subject of the oil injection system: I was under the impression from my 66' Yamaha, which has a really crude system using a similar concept, that the older oilers tended to inject a shitload of oil because two stroke oil wasn't as good as it is now. Mine does something like 20:1 or more when you're on the throttle, and it can be adjusted. Might be worth checking the specs on the Subaru system as well. If your oiler is in good shape and you're running some nice synthetic two smoke oil you might have some headway.
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Jun 10, 2015 06:58
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Checking the throttle swing last night confirmed that "full" throttle there was only about 70-80% open. We're probably going to redesign a new throttle arm for the pedal which will give more travel.
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Jun 10, 2015 22:08
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Steak Flavored Gum posted:Checking the throttle swing last night confirmed that "full" throttle there was only about 70-80% open. We're probably going to redesign a new throttle arm for the pedal which will give more travel. Steak Flavored Gum: How is your Megasquirt setup? Did you get a custom trigger wheel made?
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Jun 10, 2015 22:26
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Steak Flavored Gum posted:Checking the throttle swing last night confirmed that "full" throttle there was only about 70-80% open. We're probably going to redesign a new throttle arm for the pedal which will give more travel. Is this the computer-reported TPS reading? Those have a WOT reading of ~80% usually, and 100% indicates a TPS error.
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Jun 10, 2015 22:53
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This is a car where the only factory switched 12V source in the engine compartment was the ignition coil positive line. There ain't any computer-reported anything beyond what we've programmed into the Megasquirt. The TPS is set to 0% at idle position and 100% at wide open. The trigger wheel is one of the sharp toothed small 36-1 wheels from DIYautotune.com using a Volvo hall effect sensor. Works great.
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Jun 10, 2015 23:55
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Steak Flavored Gum posted:This is a car where the only factory switched 12V source in the engine compartment was the ignition coil positive line. There ain't any computer-reported anything beyond what we've programmed into the Megasquirt. The TPS is set to 0% at idle position and 100% at wide open. Okay cool, I'm going to have to use a 60-2 trigger wheel
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Jun 11, 2015 00:07
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What car are you 'squirting?
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Jun 11, 2015 00:23
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Steak Flavored Gum posted:What car are you 'squirting? Audi 4000 Quattro with 20v 3B Turbo 5 cylinder.
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Jun 11, 2015 00:25
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| # ? Apr 28, 2024 19:16 |
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CommieGIR posted:Audi 4000 Quattro with 20v 3B Turbo 5 cylinder. 
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Jun 11, 2015 07:13
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