Yet again .... JMSSAWS strikes

[sawmikaze]

I just keep gettin more pissed about this.

 

[Jswanson]

How much heat is required to discolor hardened steel bearings and not boil case paint or distortion?

 

[Moparmyway]

I just keep gettin more pissed about this.

Wait until you run her Ryan ...... all of that anger is gunna melt away with the chips. Got some porting done today too ......... I'm hoping to run her this weekend

 

[Moparmyway]

How much heat is required to discolor hardened steel bearings and not boil case paint or distortion?

The plastic retainers melted at around 300 degrees F and coated everything....... no paint was damaged

 

[huskihl]

The bearing metal changes color when I heat the cases up too. Never has harmed the paint

 

[Chainsaw Jim]

I just keep gettin more pissed about this.

I didn't want to bring it back up because it isn't good on your nerves.
I apologize for that.

FWIW, considering the rest of the components involved in the Jack Members's Stuff problem this was merely cosmetic and should be as functional as any other.

 

[sawmikaze]

Wait until you run her Ryan ...... all of that anger is gunna melt away with the chips. Got some porting done today too ......... I'm hoping to run her this weekend
View attachment 87033

Do your thang kev.

 

[blsnelling]

It's numbers (without a gasket) outta the box were 82.5 intake, 91.5-92 exhaust, 120 transferrs.

Wow! I have never heard of one being that high! I don't think I've seen more than 96. Very interesting.

 

[Dub11]

Wow! I have never heard of one being that high! I don't think I've seen more than 96. Very interesting.

Could it be a case of QC don't give two dams cause it's an older saw model?

 

[Moparmyway]

Could it be a case of QC don't give two dams cause it's an older saw model?

No Sir, I don't believe this to be true

This isn't the first OEM 066/660 thats timed this way. Matter of fact, this is actually the third one that I've seen in the last few months, it seems that Stihl has changed the timing on their cylinders.

There are some great running 90cc Stihls that have timing numbers around the 93-96/82-85/120-123 ish ranges...........I'm expecting this to be another one.

 

[Deets066]

Wow! I have never heard of one being that high! I don't think I've seen more than 96. Very interesting.

I have 3 066 cylinders here, 2 of em are at 94 and the other at 95

 

[srcarr52]

No Sir, I don't believe this to be true

This isn't the first OEM 066/660 thats timed this way. Matter of fact, this is actually the third one that I've seen in the last few months, it seems that Stihl has changed the timing on their cylinders.

There are some great running 90cc Stihls that have timing numbers around the 93-96/82-85/120-123 ish ranges...........I'm expecting this to be another one.View attachment 87114

Ready for a dicon pipe straight from the factory.

 

[Moparmyway]

Maybe they are trying to get into factory racing ??

 

[Mastermind]

Maybe they are trying to get into factory racing ??

My piped 066 is at 85/120/85

 

[Lightning Performance]

I'll time all the 1122 I can find this next week.

Hey Brad hows OE Stihl 92* exhaust out the box sound? No. Found a china jug at 89/132/85 060 with gasket lol.

 

[Chainsaw Jim]

I'm wondering if Stihl was producing different castings for specific markets?

 

[Mastermind]

I'm wondering if Stihl was producing different castings for specific markets?

I bet I've seen 10 different 066/660 jugs......and maybe more 046/460 jugs.

 

[Chainsaw Jim]

I bet I've seen 10 different 066/660 jugs......and maybe more 046/460 jugs.

I assume they did it for a reason since it doesn't seem likely for port locations to migrate around using the same mold. I wonder who has a copy of the engineering spec sheet with all the information on this.

This would probably mean every 1122 top end is a "unicorn" in its own intended region? Lol

 

[Moparmyway]

Making progress .....
This one cleaned up

This one needed additional help:

 

[Moparmyway]

More
Once the loctite cures, the cases will get cleaned and I'll get the bearings installed, then keep assembling ........ working on the rest of the porting now

Just want to say thanks to @drf256 , the timesert kit used here was generously offered for use from him. Thanks Doc !