sinfull
Scoot Enthusiast
Posts: 353
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Post by sinfull on Dec 1, 2022 21:27:58 GMT -5
Assuming the red is injector duty cycle ??
Not sure about the rest of the graph though.
But if injector cycle then you are correct about needing a bigger injector just a little bit lol
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 1, 2022 21:46:51 GMT -5
Assuming the red is injector duty cycle ?? Not sure about the rest of the graph though. But if injector cycle then you are correct about needing a bigger injector just a little bit lol The table is based on Volumetric Efficiency, so its not DIRECTLY duty cycle. But ESSENTIALLY 255 is 100% duty cycle. During tuning it tried to take some of those fields as high as 350 VE which doesn't work, as you can't go more than 100%. So yeah... Even overdriving my injector like I am isn't enough fuel. Time to get bigger. Quite a bit bigger  |
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 6, 2022 18:58:29 GMT -5
 New injectors in last night along with a new wideband O2 sensor... Apparently my O2 sensor was failing giving me really wildly fluctuating AFR readings which were hard to tune with! This tiny little injector is rated at 377cc/min, where the stock injector for this motor is rated at 158cc/min(Though I was overdriving it to 182cc/min with more fuel pressure.) Thats an almost 240% increase in fuel capacity at full boost which should give me enough to push to 15PSI if I want/can. Took it on a quick tuning run and zipped right up to my 11PSI max with no problems and a good AFR this time, as a bonus its in boost almost right off the line and stays in boost through most of the power band! |
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sinfull
Scoot Enthusiast
Posts: 353
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Post by sinfull on Dec 6, 2022 19:36:36 GMT -5
That is impressive
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Post by bigmatthew86 on Dec 6, 2022 21:59:22 GMT -5
My Zuma 125 with a 158 kit feels pretty quick. That thing must be scary fast.
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Post by wiscootsin on Dec 6, 2022 22:29:30 GMT -5
i bought a salvage condition Vespa GT200L and was able to get it running from a chinese ECU without immobilizer. i believe the fuel injection models would be harder to find the non-oem ECU for. But anyway, those couldn't do the stuff you're doing with it anyway! the 300lb vespa with a stock GT200 is pretty smooth but nice performing. i'm sure the rip of it on a buddy would be exhilarating.
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 6, 2022 22:50:24 GMT -5
i bought a salvage condition Vespa GT200L and was able to get it running from a chinese ECU without immobilizer. i believe the fuel injection models would be harder to find the non-oem ECU for. But anyway, those couldn't do the stuff you're doing with it anyway! the 300lb vespa with a stock GT200 is pretty smooth but nice performing. i'm sure the rip of it on a buddy would be exhilarating. Yeah, the GT's being carbed are a little easier to get going without the stock ECU. Supposedly the GT's carb and the aftermarket ECUs can be adapted onto the GTS engine, but doing the megasquirt like I did was a better solution all around. Its pretty wild, it goes like mad especially being 134lbs lighter than a GTS in the Buddy frame. When the turbo kicks in it flys. |
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 7, 2022 16:20:16 GMT -5
I had a few minutes to do a bit of goofing with my scoot... Since the tune was pretty decent I figured it was time to do some performance measurements. I took it to a long straight stretch of road near my house and let her rip! Despite the slipping clutch, and the road being slightly uphill, and a crappy start off the line I pulled a 7.6s 1/8th mile and 14 flat in the quarter(after I let off no less!)! Looking at the final speeds its clear that it wasn't taking off too hard at the line but was pulling like a madman once it got into boost. Which is certainly what it felt like! It was hard to not want to let off the throttle with how hard it was pulling. The math says that at a 7.6s 1/8th mile I'm putting down 54HP now. A fair bit more than I expected to be pulling! Not too shabby!  |
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Post by Lucass2T on Dec 8, 2022 2:01:16 GMT -5
I had a few minutes to do a bit of goofing with my scoot... Since the tune was pretty decent I figured it was time to do some performance measurements. I took it to a long straight stretch of road near my house and let her rip! Despite the slipping clutch, and the road being slightly uphill, and a crappy start off the line I pulled a 7.6s 1/8th mile and 14 flat in the quarter(after I let off no less!)! Looking at the final speeds its clear that it wasn't taking off too hard at the line but was pulling like a madman once it got into boost. Which is certainly what it felt like! It was hard to not want to let off the throttle with how hard it was pulling. The math says that at a 7.6s 1/8th mile I'm putting down 54HP now. A fair bit more than I expected to be pulling! Not too shabby! Put it in the speedlist!!! |
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 8, 2022 12:20:16 GMT -5
I had a few minutes to do a bit of goofing with my scoot... Since the tune was pretty decent I figured it was time to do some performance measurements. I took it to a long straight stretch of road near my house and let her rip! Despite the slipping clutch, and the road being slightly uphill, and a crappy start off the line I pulled a 7.6s 1/8th mile and 14 flat in the quarter(after I let off no less!)! Looking at the final speeds its clear that it wasn't taking off too hard at the line but was pulling like a madman once it got into boost. Which is certainly what it felt like! It was hard to not want to let off the throttle with how hard it was pulling. The math says that at a 7.6s 1/8th mile I'm putting down 54HP now. A fair bit more than I expected to be pulling! Not too shabby! Put it in the speedlist!!! Ohh, I plan to! I've gotta finish dialing it in and then get some good video of it going. I wanna see if I can snag the top spot on the 0-60 board the current 5.2 second record is moving pretty quick, but I'm starting to put down some serious power. |
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 8, 2022 17:58:01 GMT -5
Well, I made a useful discovery this afternoon... I was tinkering with my scoot and some leaves had blown underneath the bike, when I started it I noticed that it blew the leaves away even though they were nowhere near the exhaust end. That in turn led to me reaching down underneath the bike and finding that I had a fairly large exhaust leak going on. I'm not the world's greatest welder and apparently one of my welds was leaking a fair bit. So I pulled the header off the bike and did a leak test with a shop vac and some soapy water and found a couple OTHER places my header was leaking. I took some time to fix those leaks and took it out for a spin. By the end of my street (About 200ft) I was now pulling 11psi where I would normally hit about 6psi in that distance. So that was an improvement. Time to take it out for a bit MORE of a run since the rain had stopped for a moment.
Long story short I pulled 20PSI!!! That was far FAR more boost than I ever expected this turbo could do on my engine, and the math says that pushes me to almost 60 horsepower! It also meant that things I had cheaped out on, like a blow off valve were now important items to add to my build. Its only money, right? So I'll leave you with a little video clip showing my boost gauge hit 20PSI.
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Post by jbjhillbilly on Dec 8, 2022 22:07:52 GMT -5
Damn that thing boogies! I’m used to watching the speedo on Buddies moving well, but that’s a fair bit quicker.
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 8, 2022 22:20:01 GMT -5
Damn that thing boogies! I’m used to watching the speedo on Buddies moving well, but that’s a fair bit quicker. Heh, yeah. It wraps it around pretty quick. It accelerates even faster just past that point too but it was a bit too quick for the road I was on to try it. That and I didn't really wanna see if it'd go past 20PSI. I'd start worrying about my head gaskets |
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Post by 90GTVert on Dec 9, 2022 0:20:28 GMT -5
I took it to a long straight stretch of road near my house and let her rip! Despite the slipping clutch, and the road being slightly uphill, and a crappy start off the line I pulled a 7.6s 1/8th mile and 14 flat in the quarter(after I let off no less!)! Looking at the final speeds its clear that it wasn't taking off too hard at the line but was pulling like a madman once it got into boost. Which is certainly what it felt like! It was hard to not want to let off the throttle with how hard it was pulling. The math says that at a 7.6s 1/8th mile I'm putting down 54HP now. A fair bit more than I expected to be pulling! Not too shabby! I'm assuming this is an app and not a dedicated drag timer? This is not intended as a hater/negative comment. I've just spent way too long looking at acceleration times and the results don't make a lot of sense to me. I've also tested GPS apps before and found that they can be all over the place, while a dragy (the only dedicated unit I've used... since the days of the GForce) is very consistent as long as the satellite signal is good and the data acquired makes sense. Your 1/8 mile ET is 7.62 @ 49MPH. To go 660ft in 7.6 seconds, you'd have to be going ~59MPH from start to finish or average that speed. Trap speed should be MUCH higher, even if it's slow off the line. My TMAX goes 9s in the eighth and that's at 70MPH+ with it leaving pretty well (not great, but 2.1X 60ft, 6 second 0-60). It's only a 40-45HP bike. If you got off the line slow, you're still only going 29MPH at 330ft and then only pull another 20MPH by the 1/8? Stuff that pulls somewhat consistently (not always how it works in our relatively low HP world) could make maybe an 11-12 second 1/4 mile with an 1/8 mile ET like that, but the MPH would be more like 20+ seconds. Even when I was doing 17 second 1/4s just under 80MPH, I was seeing 66MPH in 11 seconds for the 1/8 with a much more leisurely launch that left me kinda bored waiting for it to go. Different info tells you different things and one vehicle that does 7.6 may do it differently than another that goes 7.6... but something's just not right in this case. Again, not trying to be a jerk. That's not me. I'm just pointing this out because I think you'll need a more accurate timing method if you intend to utilize this data for tuning or comparing to other setups. |
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Kaos
Scoot Enthusiast
Posts: 185
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Post by Kaos on Dec 9, 2022 0:30:55 GMT -5
I took it to a long straight stretch of road near my house and let her rip! Despite the slipping clutch, and the road being slightly uphill, and a crappy start off the line I pulled a 7.6s 1/8th mile and 14 flat in the quarter(after I let off no less!)! Looking at the final speeds its clear that it wasn't taking off too hard at the line but was pulling like a madman once it got into boost. Which is certainly what it felt like! It was hard to not want to let off the throttle with how hard it was pulling. The math says that at a 7.6s 1/8th mile I'm putting down 54HP now. A fair bit more than I expected to be pulling! Not too shabby! I'm assuming this is an app and not a dedicated drag timer? This is not intended as a hater/negative comment. I've just spent way too long looking at acceleration times and the results don't make a lot of sense to me. I've also tested GPS apps before and found that they can be all over the place, while a dragy (the only dedicated unit I've used... since the days of the GForce) is very consistent as long as the satellite signal is good and the data acquired makes sense. Your 1/8 mile ET is 7.62 @ 49MPH. To go 660ft in 7.6 seconds, you'd have to be going ~59MPH from start to finish or average that speed. Trap speed should be MUCH higher, even if it's slow off the line. My TMAX goes 9s in the eighth and that's at 70MPH+ with it leaving pretty well (not great, but 2.1X 60ft, 6 second 0-60). If you got off the line slow, you're still only going 29MPH at 330ft and then only pull another 20MPH by the 1/8? Stuff that pulls somewhat consistently (not always how it works in our relatively low HP world) could make maybe and 11-12 second 1/4 mile with an 1/8 mile ET like that, but the MPH would be more like 20 seconds. Even when I was doing 17 second 1/4s just under 80MPH, I was seeing 66MPH in 11 seconds for the 1/8 with a much more leisurely launch that left me kinda bored waiting for it to go. Again, not trying to be a jerk. That's not me. I'm just pointing this out because I think you'll need a more accurate timing method if you intend to utilize this data for tuning or comparing to other setups. Hmmmmm.... Looking at the math you might be right. Its an app. Drag Racer for Android. I've found it reasonably close to the times for my drag car, though last time I used it was a different phone so maybe this one is less accurate. I do agree those trap speeds don't make any sense. I do think its time to go buy a Dragy, everyone says they're spot on accurate. I also have a 10hz GPS dongle that should work with the Drag Racer app that should be more accurate as well. Either way something is likely off with that. Which sucks. 7.6s is pretty awesome, but now I can't trust it! |
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