Mastermind Meets The MS500i

[Mastermind]

Are these rubber coated steel gaskets?

Yes sir.

 

[Mastermind]

So.....


Stock:

.027” squish clearance

Ex: 106.5

Transfer opening point on the exhaust side: 118°

Fully open at 125° on the intake side.

In: 83°

 

[Mastermind]

My gut tells me to go.....

Ex: 105°
Tr: 124°
In: 83°

 

[Manofstihl661]

My guy is telling me .... tacos!

 

[Mastermind]

My gut tells me to go.....

Ex: 105°
Tr: 124°
In: 83°

This first one is going 103/124/83

 

[Mastermind]

There's room to widen the exhaust port to 32mm without getting too close to the ring locating pin. 32mm is just over 59% of 54mm.

 

[huskihl]

I'm sorta surprised that there hasn't been more discussion about the transfer opening points....

What are your thoughts on them? They seemed normal to me, or at least that’s how I’ve been doing them, other than the taper. I usually open the exhaust side 3-5° earlier than the secondaries.

Stihl definitely has different ideas on scavenging than others. On all of the newer saws, the intake side transfers are designed to allow the charge to hug the intake wall, where most other manufacturers still shoot the charge out a little bit

 

[Agent Smith]

This first one is going 103/124/83

Are you going 105° first then going back in and trying 103°?

 

[Mastermind]

What are your thoughts on them? They seemed normal to me, or at least that’s how I’ve been doing them, other than the taper. I usually open the exhaust side 3-5° earlier than the secondaries.

Stihl definitely has different ideas on scavenging than others. On all of the newer saws, the intake side transfers are designed to allow the charge to hug the intake wall, where most other manufacturers still shoot the charge out a little bit

It seems like Stihl has been following our old build threads huh? LOL

 

[huskihl]

It seems like Stihl has been following our old build threads huh? LOL

LOL. Yeah I’m sure that’s it

 

[Mastermind]

Are you going 105° first then going back in and trying 103°?

No sir.

I have four saws here. I'll do each one a little differently.

Then I test them in 12 x 12 clear wood. Video all the cuts and then time them. That tells me which direction I need to go.....

 

[Mastermind]

LOL. Yeah I’m sure that’s it

Those bastards !!!! We need our royalty checks !!!!!!!!!!!!!!!!!!

 

[Fruecrue]

No sir.

I have four saws here. I'll do each one a little differently.

Then I test them in 12 x 12 clear wood. Video all the cuts and then time them. That tells me which direction I need to go.....

Done yet?

 

[TreeLife]

Those bastards !!!! We need our royalty checks !!!!!!!!!!!!!!!!!!

Can you imagine that? Lol they call you up, cut you a check and have you come in for R&D.

 

[redlinefever]

 

[Mastermind]

Done yet?

I've got the transfer ports all roughed in. WooHoo !!!!!!!!!!!!!!!

 

[drf256]

I think the faster piston speed is the reason they like more BD. It makes sense.

edit: slower piston speed.

 

[Lightning Performance]

A computer should tell us how much run time we have left! LOL

Lmbo

 

[RI Chevy]

We ain't here for a long time, were here for a good time...[emoji106][emoji16]

 

[Lightning Performance]

I think the faster piston speed is the reason they like more BD. It makes sense.

Bingo. Less time @ higher rpms.