Inside the.....? (solved, MS 500i)

[MG porting]

Maybe he's tired of us.lol

 

[RI Chevy]

Nah... He said he was real busy. He'll get to it soon enough and make it scream.

 

[StephK87]

Sorry, I did not have much time left over the last few days, but i'm on it now

before i forget, here is the 7pin vid with the 500i and the 462 (and a new and stock 390xpg)

 

[RI Chevy]

Thanks for these StephK.
You feel any difference when running them between 7 and 8 pin? One feel stronger? Saw run in sweet spot better?

 

[TreeLife]

That really speaks to the stoutness of the 462. Quite the saw indeed.

 

[ferris]

That really speaks to the stoutness of the 462. Quite the saw indeed.

But the 462 is the only saw that is really broken in

 

[MG porting]

Sorry, I did not have much time left over the last few days, but i'm on it now

before i forget, here is the 7pin vid with the 500i and the 462 (and a new and stock 390xpg)

Pretty cool stuff and how I see it there all good runners time to port the 500i now?

 

[TreeLife]

Pretty cool stuff and how I see it there all good runners time to port the 500i now?

I'm most excited to see how the efi performs with a port job.

 

[MG porting]

I'm most excited to see how the efi performs with a port job.

Me to it could be good or bad pending if it can adjust to it and there's only one way to find out.lol

 

[huskyboy]

462 just flat hauls rpms in the wood in my experiences, but not heaps of low end torque. A fast and rather highly strung saw. How’s the 500i’s torque feel in comparison?

 

[ABarrick]

I’m curious how it’s going to handle mods too. With the lack of sensor inputs, there has to be a lot of assumptions made in the fuel mapping.

 

[mettee]

So the saw has no map sensor or anything? It can't be strictly map(tuning) based provisions. The has to be some sort of reference to temp and density altitude...at least.

 

[mettee]

I want to see the saw dogged in on a full cut with some pressure on it, until it stalls, I'm curious to see how much grunt it has.

 

[blsnelling]

462 just flat hauls rpms in the wood in my experiences, but not heaps of low end torque. A fast and rather highly strung saw. How’s the 500i’s torque feel in comparison?

In my experience, the 462 does not make the RPMs of either the 461 or 460/046.

 

[ABarrick]

So the saw has no map sensor or anything? It can't be strictly map(tuning) based provisions. The has to be some sort of reference to temp and density altitude...at least.

It’s my understanding it has a MAP/pressure sensor, a temp sensor and ability to register crank speed. Those are enough for speed density but in the Automotive world, speed density systems have a throttle position sensor and use an oxygen sensor to check whether to deviate rich or lean from the base map. Think GM TBI systems, Honda PGM-FI, etc. Systems with no air flow meter/MAF sensor.

My bike (98 VFR) is FI. It actually still has a manual “choke” though for cold starting. It’s really an enrichener/starter jet, not a choke plate. My RC51 was the same way. They use a programmed FI system which has no feedback measures. It’s all in the mapping. It uses air and engine temperature, throttle position, rpm and load or calculated load inputs to derive the proper injector pulse time in milliseconds. It does compensate for weather and condition changes but it’s still a predetermined, programmed value.

I’m totally guessing here, but I bet this system is similar in function.

 

[PA Dan]

It’s my understanding it has a MAP/pressure sensor, a temp sensor and ability to register crank speed. Those are enough for speed density but in the Automotive world, speed density systems have a throttle position sensor and use an oxygen sensor to check whether to deviate rich or lean from the base map. Think GM TBI systems, Honda PGM-FI, etc. Systems with no air flow meter/MAF sensor.

My bike (98 VFR) is FI. It actually still has a manual “choke” though for cold starting. It’s really an enrichener/starter jet, not a choke plate. My RC51 was the same way. They use a programmed FI system which has no feedback measures. It’s all in the mapping. It uses air and engine temperature, throttle position, rpm and load or calculated load inputs to derive the proper injector pulse time in milliseconds. It does compensate for weather and condition changes but it’s still a predetermined, programmed value.

I’m totally guessing here, but I bet this system is similar in function.

AJ you make my head hurt![emoji6]

 

[mettee]

It’s my understanding it has a MAP/pressure sensor, a temp sensor and ability to register crank speed. Those are enough for speed density but in the Automotive world, speed density systems have a throttle position sensor and use an oxygen sensor to check whether to deviate rich or lean from the base map. Think GM TBI systems, Honda PGM-FI, etc. Systems with no air flow meter/MAF sensor.

My bike (98 VFR) is FI. It actually still has a manual “choke” though for cold starting. It’s really an enrichener/starter jet, not a choke plate. My RC51 was the same way. They use a programmed FI system which has no feedback measures. It’s all in the mapping. It uses air and engine temperature, throttle position, rpm and load or calculated load inputs to derive the proper injector pulse time in milliseconds. It does compensate for weather and condition changes but it’s still a predetermined, programmed value.

I’m totally guessing here, but I bet this system is similar in function.

Okay so it is running crank sensor off the flywheel likely, map, and temp. That is going to make the map active.

Whatever the voltage is to the sensors, you could intercept that to tune. More than likely just temp sensor manipulation. Map sensors are different and you can't really adjust the pressure they see, from my experience back in the day you can't intercept and adjust the output voltage signal from the map.

 

[mettee]

AJ you make my head hurt![emoji6]

You need an ice cold Pabst

 

[PA Dan]

You need an ice cold Pabst

Said no man ever...[emoji13]

 

[mettee]

Said no man ever...[emoji13]

Oh come on!