661 R&D

[jmssaws]

Here's some pics of the cylinder on it, cylinder #2

 

[jmssaws]

The exhaust port had a boo boo

 

[CR500]

Surprised it was usable lol

Sent from my non internal combustion device.

 

[Time's Standing Stihl]

Not bad Jason, give it some time. im sure you will find some more power.

Any timing adv?

 

[jmssaws]

No advance

 

[huskihl]

No advance

You ought to have this figured out about 4am. Waiting on vids....

 

[Deets066]

That cylinder is 99 123 126 82 and maybe 165lb of compression. Only cut 012 from the chamber. It was 104 125 130 79 stock so I didn't want to lower it much.

I've been thinkin the same way, I'm not gunna lower a cylinder a mile when the numbers should come up anyway. The camp gain ain't worth over grinding a cylinder

 

[jmssaws]

Couple guys I talked to say they haven't seen a cylinder timed like that one.
I'm porting the other cylinder today different

 

[Moparmyway]

The exhaust port had a boo boo
View attachment 36933

Compression relief

 

[jmssaws]

It as 170lbs of compression, more than I thought with so little from the chamber

 

[Redfin]

Couple guys I talked to say they haven't seen a cylinder timed like that one.
I'm porting the other cylinder today different

170s ex. Please?

 

[Red97]

When you tear it back down, will ya take a pic of the piston wash. Please.

 

[jmssaws]

 

[paragonbuilder]

Must be weird not to be tuning it...


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[CR500]

Must be weird not to be tuning it...


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Probably easier to pull the jug off compared go an Arctic lpl

Sent from my non internal combustion device.

 

[jmssaws]

The stock and ported videos from last night are maybe 10 min apart,I changed cylinders between them.

I'm gonna throw a standard carb on it in a minute

 

[jmssaws]

Here is my 066 and the 064/056 same bar and chain as the 661

 

[RI Chevy]

Nice. I sense the 066 with carb a little faster than the Mtronic. And it also seemed faster than the 064/56 hybrid.

 

[jmssaws]

Both are ahead of the 661 by a little.
066 sounds faster but it's not by much if any.
I didn't time them good

 

[jmssaws]

is that 066 your fastest?

Sometimes

I'm porting another 661 cylinder now that will be closer.