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Post by geh3333 on Jun 13, 2015 2:28:54 GMT -5
Wow I messed up big ! 14.7 lbs of air to burn 1 lb of gas . I did my math with 1 gallon of gas not 1 lbs. So here we go again. I found that it takes 9,000 gallons of air to burn 1 gallon of gas. So after burning the 1 gallon of gas with 165,000 ignition strokes , take 9,000 ÷ 165,000 is 206.477 ml of air which is 206.477 cc's . now this conversion was with water which is more dense then gasoline . gasoline is pretty close to 75% the density of water . so let's take 75% of 206.477 cc's which is 154.  cc's , now add the gas which is .0916 cc's , add 25% for the gas density and we get .1145 cc's + 154. cc's is a total of 154.9545 cc's which can be rounded to 155 cc's . I have a 58.5 bbk which is supposedly 155 cc . so I'm using nearly every bit of the chamber for consumption. |
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Post by geh3333 on Jun 13, 2015 0:12:03 GMT -5
(Edit) please skip this post , wrong air calculation !!
Yeah , I just did the equation. So let me figure in the fuel. Which .0916 grams is .0916 cc , lol. So still about 125cc . now take into consideration that the amount of air I used in the equations was the amount needed for combustion . so its probably a lean mixture if its the exact amount needed for combustion. So let's up the air slightly and try this again.
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Post by geh3333 on Jun 12, 2015 23:59:14 GMT -5
The problem is the metal bracket in the center of the hole. If you point the pump nozzle right at it , the gas sprays back out of the tank. But all you should have to do is point the nozzle to either side of the bracket. doesn't work for me the majority of the stations around here the slowest setting for pumping sprays it too hard off the sides and splashes back out too I can just about fit the nozzle between the bracket and the opening, it sprays hard , but makes it past the bracket. Maybe our tanks are a little different ? |
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hoca 52mm kit
by: geh3333 - Jun 12, 2015 23:01:08 GMT -5
via mobile
Post by geh3333 on Jun 12, 2015 23:01:08 GMT -5
There is no way I'd ever buy another koso. The k&s variator I bought is so much better in many ways. Can't wait to see the video !
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hoca 52mm kit
by: geh3333 - Jun 12, 2015 22:42:34 GMT -5
via mobile
Post by geh3333 on Jun 12, 2015 22:42:34 GMT -5
I've been testing it doing gps runs it did 51 gps with the 20mm I put on a 24mm carb got it tuned in and it now runs 56gps gonna vid after break in it May reach 60 without the stroker. Its not much slower than my 150 on flats but the 150 is way stronger on hills.The hoca 52mm with matching head one gasket is the way to go I'm running the 17/49 gear set and its actually faster after I took off the koso and run stock variatior and 5 gram sliders. Yes!! , so the bigger carb does much better for her ? Its great to see these results!! You have no clue what it feels like to have your theories proven right. Especially after all these years . well they weren't actually theories to me , since I did it with success , but after been told I had no clue what I was doing and not to listen to me !! Well this is great news !! Also the koso , again, yes!! The newer Koso's are junk !! That's why rcq and I wanted to do some testing on them . only problem is the mpg go way down , lol. |
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Post by geh3333 on Jun 12, 2015 22:22:59 GMT -5
I would say the only reason I can tell that it is in there is so you know where to stop so you do not overfill your tank. Uh, the pump doesn't just click off like normal? That seems weird. I mean, I take off my scoot's gas cap, stick in the tank nozzle, set it to low and let it go 'til it clicks off on its own. Now my old Taurus, I would guess roughly how much gas he needed (never accurate 'cause he lied low), then start listening ear at the nozzle for when the pitch of the pumping started going higher. Then I'd click off and top him off. Otherwise when it shut off, he'd vomit gas down his side and sometimes all over the ground. He really was a naughty car (probably a big reason why I loved him so much--the naughty, not the gas). So why doesn't your tank click the nozzle, and mine (THANKFULLY!!) does? >'Kat The problem is the metal bracket in the center of the hole. If you point the pump nozzle right at it , the gas sprays back out of the tank. But all you should have to do is point the nozzle to either side of the bracket. |
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Post by geh3333 on Jun 12, 2015 22:20:43 GMT -5
Engine theory,,,my fave,,,,papa likes These are the things that need to be done , so we can say for certain , what works or what is to big or too much . I'm one who likes to know for sure before I point others in the that direction. Like the bigger carb theory . I've done it and succeeded as well have others with great results. Not that it is necessary , but it is not too much for these engines, and better performance can come from it. |
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Post by geh3333 on Jun 12, 2015 22:15:01 GMT -5
Can anyone tell me how much space .161 grams of air and .0916 ml of gas takes up ? The air is the hard part. not if you know 1 cubic foot of air at standard temperature and pressure assuming average composition weighs approximately 0.0807 lbs or 0.0366 kg 28317cc per cubic foot 28317 divided by (36.6gram /0.161g) equals 124.56 cc of air just about what you would expect on a 150cc with less than 100 percent volumetric filling efficiency (Edit) please skip this post , wrong air calculation !! Are you saying 124.56 cc of air is with my calculations then ? So add the fuel and we get what ? If this is the case , then this shows that these scoots come well under carbed or well under jetted , or both. |
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Post by geh3333 on Jun 12, 2015 20:24:12 GMT -5
If you can stay at the steady rpm rate , then the suction from the piston should be pretty equal each time. So calculating how much fuel was consumed during the run and how many ignition strokes where made , well that's pretty simple . you have to take into.consideration the short time it takes to get up to the specific rpms and stopping at the end , bit that would be a nominal difference. Your right that a higher rpm will create greater suction , I actually had a few posts about this in the recent past. But that's why you do the test at a steady rpm.
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Post by geh3333 on Jun 12, 2015 20:16:14 GMT -5
A four stroke fires every other time not every fourth,, and the calculations for proper cylinder fill also take into account the phenomenon of " inertia charging",,, the cylinder is getting more fuel/air mix than the actual volume of the total cc's,,, because the air fuel mix has mass/ weight if you have the correct intake length and size to keep velocities up it will " overcharge "the cylinder,,,the mix is really moving ,,and the reason for intake " honk" or the growl you hear is the charge going supersonic,,,, mini sonic booms,,,,,,,papa likes Taking the rpms at a steady rate at a certain time and calculating the fuel consumption will tell you the same thing . that's why you must do the test at a specific rpm and stay at that rpm for a steady pace. My numbers are not 100% accurate but should be close. The only way to know for sure it to do the actual test. |
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Post by geh3333 on Jun 12, 2015 20:03:44 GMT -5
It should be rijt if I just times .0458 × 2 right? So .0916 ml of fuel every ignition stroke.
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Post by geh3333 on Jun 12, 2015 20:01:13 GMT -5
A four stroke fires every other time not every fourth,, and the calculations for proper cylinder fill also take into account the phenomenon of " inertia charging",,, the cylinder is getting more fuel/air mix than the actual volume of the total cc's,,, because the air fuel mix has mass/ weight if you have the correct intake length and size to keep velocities up it will " overcharge "the cylinder,,,the mix is really moving ,,and the reason for intake " honk" or the growl you hear is the charge going supersonic,,,, mini sonic booms,,,,,,,papa likes Correct there Borg. I was lets say "Behaving Myself" I'm on a roll of not being Banned. Yet!  Don't worry piston , if I'm wrong I def admit it , lol . please correct me next time  |
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Post by geh3333 on Jun 12, 2015 19:59:37 GMT -5
A four stroke fires every other time not every fourth,, and the calculations for proper cylinder fill also take into account the phenomenon of " inertia charging",,, the cylinder is getting more fuel/air mix than the actual volume of the total cc's,,, because the air fuel mix has mass/ weight if you have the correct intake length and size to keep velocities up it will " overcharge "the cylinder,,,the mix is really moving ,,and the reason for intake " honk" or the growl you hear is the charge going supersonic,,,, mini sonic booms,,,,,,,papa likes Crap !! I was counting every stroke as every upstroke and every downstroke , but that won't work with my calculations . I'll fix it hold on |
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Post by geh3333 on Jun 12, 2015 19:50:42 GMT -5
(Edit) please skip this post , wrong air calculation !!
Can anyone tell me how much space .161 grams of air and .0916 ml of gas takes up ? The air is the hard part.
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Post by geh3333 on Jun 12, 2015 19:47:30 GMT -5
Or maybe I can just compare that to a stock scoots mpg . but what we really need is someone who has just done a uni and exhaust mod with an upjet and see how many mpg they get compared to the stock setup. Keeping the same bore and head size will show how much more fuel is able to be burned in the chamber then how much is being burned with the stock setup. This will show that even a stock bore can take more air and fuel , and still not be too rich .
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cc's , now add the gas which is .0916 cc's , add 25% for the gas density and we get .1145 cc's + 154.
