Suggestions on Measuring Speed

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MonsterAir

MonsterAir

Lone Racer 🤠
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I'm gearing up to do some performance testing this coming season and need some input on what variables I should be taking into account for these tests.

I'm looking to judge speed and acceleration performance of different upgrades and sized engines. I want to know exactly how much performance gain I get with each upgrade vs stock. Here's where my head it at right now....

-Temp
-Humidity
-Elevation
-Weight
-Distance
-Wind?
-Tires
-Gearing
-Suspension setup
-Diff fluid (I'm kinda lost on what is best for this 2wd)
-Oil ratio
-Clutch Spring
-RPM


I'm unsure what I should set my distances at? I need one long run for top speed and I need a shorter run for acceleration testing. I figure I'll do a set of 10 laps per test (short & long) then average the times/speeds. I also have to start looking for a proper spot to do this, dirt or grass is the question.
 
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i have the same as mike ^^^^^^ (y),
garmin forerunner 301 i think it is, not the newer watch one , but the older ovalish shaped one ,
 
I had the sky rc gps till I flipped my jato and it smashed. I use my cell phone now as it can give you majority of what your asking..speed humidity, wind speed,elevation
 
Maybe the title shoulda been something else, tried to make it catchy....

I'm looking to to find top speed and acceleration with each performance upgrade ie 30.5cc speed/accel vs 29cc. Or 30.5cc w/ lightened flywheel vs 32cc ect. I want to find out where the useable power ends and if thing's like flywheel, piston or somthing like a tps kit are worth the buy. Everyones all about throwing as big of an engine in their rigs but I'd like to know where the usable power ends. Does that make sense to anyone but me lmfao.


Using the variables above I want to keep the runs similar so I can have a solid guideline that people cant refute. Plan is to do 10 runs/laps with each gear ratio for each mod. See where each mod shines and where it doesn't. Make sense?
 
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MonsterAir said:
Maybe the title shoulda been something else, tried to make it catchy....

I'm looking to to find top speed and acceleration with each performance upgrade ie 30.5cc speed/accel vs 29cc. Or 30.5cc w/ lightened flywheel vs 32cc ect. I want to find out where the useable power ends and if thing's like flywheel, piston or somthing like a tps kit are worth the buy. Everyones all about throwing as big of an engine in their rigs but I'd like to know where the usable power ends. Does that make sense to anyone but me lmfao.


Using the variables above I want to keep the runs similar so I can have a solid guideline that people cant refute. Plan is to do 10 runs/laps with each gear ratio for each mod. See where each mod shines and where it doesn't. Make sense?
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you need a data logging system for speed ,rpm , EGT
 
Ok. I have been wondering how tuning comes into play here. I'm not a master tuner but can get it done, just unsure what rpm I should have the low end set and where I should have the high end. Can you shed some light pls?
 
MonsterAir said:
Ok. I have been wondering how tuning comes into play here. I'm not a master tuner but can get it done, just unsure what rpm I should have the low end set and where I should have the high end. Can you shed some light pls?
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My expirience is with racing Karts we adjusted the bottom to give crisp starts . more lean really , the top end we adjusted to the EGT temps about 1100 deg F , 2 strokes make the most power at just the edge of blowing up LOL !
 
Do you think I should be pushing the limits on tune? or Leave it set at something generous but not too lean and test everything on that tune? Idw blow things up or wear them down fast, looking for usable power for track running and top speed laps. When I say usable I'm not talking wheelies, all 4 planted and as smooth as possible.
 
MonsterAir said:
Do you think I should be pushing the limits on tune? or Leave it set at something generous but not too lean and test everything on that tune? Idw blow things up or wear them down fast, looking for usable power for track running and top speed laps. When I say usable I'm not talking wheelies, all 4 planted and as smooth as possible.
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the only way to really tell is by measuring EGT's then set them a little colder like 1000 deg , I am not sure how much IF any difference there is based on CC capacity ( shouldnt be any really ) . EGT is mainly used for racing the Airplane guys use it all the time. it tells you exactly what the motor is doing , it can be effected by Amb. Temps . Humidity Alt. etc.
 
Running on the bitter edge of lean is stupid for most, if tour racing and every last oz of power counts, yeah. Makes sense. For 90% of us, we stick to conservative tunes. Which for your purposes is what I think should be done. To make it fair, you would have to do multiple runs with the same car, and a few different gear sets. A 27cc will typically out rev the 32cc, but not have bear the low end grunt, where the larger will have the grunt and not necessarily the top end rpm. Theres always a trade off, but the bigger engines will make (should) more power allowing taller gears to be run. Good luck and keep us posted.
 
Seandonato73 said:
Running on the bitter edge of lean is stupid for most, if tour racing and every last oz of power counts, yeah. Makes sense. For 90% of us, we stick to conservative tunes. Which for your purposes is what I think should be done. To make it fair, you would have to do multiple runs with the same car, and a few different gear sets. A 27cc will typically out rev the 32cc, but not have bear the low end grunt, where the larger will have the grunt and not necessarily the top end rpm. Theres always a trade off, but the bigger engines will make (should) more power allowing taller gears to be run. Good luck and keep us posted.
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Like I said run it colder 950 -1000 deg will be fine and safe with good power, displacement = torque generally , or just WING IT Fek it :banghead: :banghead: :banghead: :banghead:
 
Thanks buzz and sean. Yes I will both start a thread and do some vids when the weather get's better. It will be cool to see where that trade off begins and if it's worth it or not. Gonna work my way up from stock to ported logging everything along the way and if the results are interesting and there is interest I'll expand and do engine maker vs engine maker.


I suppose what I'll do is test the exhaust temp while she's still blowing blue smoke and get a reading and try to stay in that zone. Does that make sense @Seandonato73 and @buzzkill ?
 
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