Performance cam in a governed engine.

[anickode]

I'm actually really excited to see the results of this. A bunch of us at work are talking about starting a little in-house budget build race league, and we agreed on 220cc max, governed engines to keep the playing field a little more level, since some of us have a lot more experience and parts laying around, and could easily build a complete monster for under the $500 limit.

 

[BigWes]

Ok. I was thinking about cracking this engine open tonight. But the word experiment keeps coming up.

In that mindset I just can't throw parts into it without recording some kind of numbers prior to the swap. We all want to know what if any difference it makes.

A seat of the pants response is great for the driver but it's neither here nor there for the reader.

Good data though is undeniable.

So tomorrow after work circumstances permitting I am going to come up with some kind of time over distance measure and log a few runs for before and after.

Do you guys think this is the right way?

 

[anickode]

There's gotta be some sort of app that can use the accelerometers and gps in your phone, combined with vehicle weight to at least give you a rough idea what kind of power you're making.

Obviously a Dyno would be the best way, but since most people (myself included) don't have one, the more data you can generate, the better your calculations will be.

 

[BigWes]

There's gotta be some sort of app that can use the accelerometers and gps in your phone, combined with vehicle weight to at least give you a rough idea what kind of power you're making.

Obviously a Dyno would be the best way, but since most people (myself included) don't have one, the more data you can generate, the better your calculations will be.

True. I don't have one either. I don't even know anything about phone apps.

I have torque pro. Just so I can access the elm327 I have plugged into my old truck. But it's useless for this.

I threw my back out last week fighting with a helicopter engine anyway. It took all I could do to put my shoes on this morning.

 

[Brianator]

I figure that timed, top speed runs will tell a story and are easy with a little help from a friend (to operate a stopwatch) and your "butt dyno" should sense if theres a torque difference. Not very scientific but if you make sure the motor is heat soaked and then take the average of 3 runs in each configuration it should yield fairly accurate results?

 

[BigWes]

Downloaded an app called Drag Racer. I'll try that and see if it works. When I get home from work later today of course. If anyone wants to give it a shot be my guest.

 

[itsid]

Drag Racer App should be fine I guess.
the most important info is acceleration,
since that is the telling value for max engine torque.
Some gps speedometers do track acceleration, some don't
so I'd recommend picking one that does

knowing the weight of the kart/rider you can calculate torque and consequently power from it,
not knowing the weight is fine though, since I doubt you gain or loose significant weight in the process of installing the mods, so at least you get a "percentage of change" value from it.

'sid

 

[BigWes]

Right. I really didn't see anything designed specifically with go-karts in mind.

I'm sure there is some talented individual out there somewhere that could write a program to do what a karter what like to have in an app.

Yesterday heavy thunderstorms rolled through the area so I was unable to try out the drag racer app.

I have rode the karts in light misty rain but I don't do lightning. Sorry. That ain't happening.

I got hit in the right shoulder by side splash once. It sucked. I don't want no part of that or anything near a full on strike.

 

[BigWes]

Still waiting on the delivery truck and weather to get better for test runs. But we do need the rain.

 

[BigWes]

I have parts for both engines now. The one one the Murray and the 208. Unfortunately the monsoon continues.

 

[anickode]

Feel free to go outside and fan some of that rain to the north.

 

[BigWes]

Feel free to go outside and fan some of that rain to the north.

I braved the rain tonight and pulled the 208 off the Streaker. I am going to start a thread on it tomorrow maybe. Hopefully I can get enough dry weather without storms to get at least a few runs on the 212 so I can get into it as well.