Woods ported my 660.

[Deets066]

So thanks to MG Porting my dumb. ass finally got numbers

98/123/82

Not terrible at all, I’d raise the trans a bit yet.

 

[Absolution]

Also wanted to show this. Talk about tight 72dl.

 

[Absolution]

Pictures of cylinder after 4 tanks @ 12,500/12,700. One and half tank milling. Seems to have a good amount of oil. There are what I would consider wear marks on piston (excluding the marks on top, I did that) there is no indention into metal only what seems like polishing.

 

[Absolution]

Part 2

 

[MG porting]

Stop calling yourself a dumb ass you just needed a little guidance that's all.

 

[MustangMike]

I like that intake, and I think your #s are good. Not sure if I would move the upper or not, 25* of blow down is just fine.

 

[huskyboy]

Part 2

Was the rod blued like that when you put it together? I’d be checking that big end bearing very closely...

 

[MG porting]

Was the rod blued like that when you put it together? I’d be checking that big end bearing very closely...

They all have that some just show up more extreme than others even my 064 show's color mid way down the rod.

 

[afleetcommand]

The blue on the rod is about heat. A couple of reasons why..I've seen that twice before...

 

[Deets066]

I like that intake, and I think your #s are good. Not sure if I would move the upper or not, 25* of blow down is just fine.

I like 20 or so in a 66. Mine has 17.
His saw seemed to run pretty good as it was though.

 

[Absolution]

Was the rod blued like that when you put it together? I’d be checking that big end bearing very closely...

I was originally worried but I looked uo and saw where peoole had those colors when they received them.

The blue on the rod is about heat. A couple of reasons why..I've seen that twice before...

So are you saying the colors are not normal? If it heated up while running I'm worried that it is starting to anneal and could cause a failure.

 

[Absolution]

I like 20 or so in a 66. Mine has 17.
His saw seemed to run pretty good as it was though.

I like that intake, and I think your #s are good. Not sure if I would move the upper or not, 25* of blow down is just fine.

They all have that some just show up more extreme than others even my 064 show's color mid way down the rod.

How would I reduce the spit back? I would like to keep that oil in case as much as possible.

 

[MG porting]

How would I reduce the spit back? I would like to keep that oil in case as much as possible.

Well as I see it you port timing is pretty good it's ok to have spit back it's more less normal for a chainsaw. And yep I'm sure the argument will begin after my comment.lol

 

[Absolution]

@MG porting
Don't worry I'm about to light the world on fire.

 

[MustangMike]

I'm watching … we don't know if we don't try!!!

 

[Absolution]

I'm watching … we don't know if we don't try!!!

2nd side was much better I found a set of sharper bits.

 

[Absolution]

You can definitely tell where I changed bits.

 

[MG porting]

Definitely be interesting to see how it reacts to those golf ball dimple's.

 

[Deets066]

Your losing case compression, but that should reduce spitback a little. You could freeport the exhaust a touch or fill the intake to 78 or so and that may reduce it a little. You could also lean it out a touch. Should be at least over 13,000

 

[MG porting]

Don't change your carb settings until you you get it running and that should tell you if it is doing anything different at idle and full throttle.