661 coils

[mdavlee]

You gunning for my record ?

Got to be fast at something with all my slow saws.

 

[94BULLITT]

Does the Euro saw use a different flywheel?

Sent from my SPH-L710 using Tapatalk

 

[mdavlee]

Does the Euro saw use a different flywheel?

Sent from my SPH-L710 using Tapatalk

No

 

[jmssaws]

020 advance 4700c
I'm going to reset it and run it again before I switch coils

 

[jmester]

What tillotson carb are you using?

 

[Deets066]

I'd guess the HS320a

 

[mdavlee]

What tillotson carb are you using?

Deets is correct.

 

[jmssaws]

I reset it and ran again with the 4700c
It needed rest for sure. Changing to the 4701 now.

 

[RI Chevy]

Sounds fast Jason. Is that your 661 CM saw?

 

[Chainsaw Jim]

I was liking the euro one but then I queued two at a time to run simultaneously and started liking the 4700c. I wish I could have hands on experience with your saws Dave. They're so close in the videos it's gotta come down to feel.

 

[jmssaws]

The 4700 is the strongest I think.
Here's the 4701a

 

[mdavlee]

I was liking the euro one but then I queued two at a time to run simultaneously and started liking the 4700c. I wish I could have hands on experience with your saws Dave. They're so close in the videos it's gotta come down to feel.

I timed them 2 or 3 times and the single fastest cut was the euro by .05 seconds. The rest of the cuts were pretty well even. 4700C sounds the best but still has too much timing.

 

[Redfin]

Someone needs to test them with a timing light. I don't have one or I'd try it

I have a 4700 and a 4701 here I can put my light on. Id like to do the same with the euro coil.

 

[mdavlee]

I have a 4700 and a 4701 here I can put my light on. Id like to do the same with the euro coil.

Kevin has done it. Depending on what happens Saturday with testing I may not use the Euro for the races in May.

 

[jmssaws]

There's a lot more timing in the 4700 than the 4701.
I run 040 advance with the 4701 and put the 4700 on and it will barely run popping and carrying on.
020 is all I can run with a 4700.

Has to be a big difference in advance

 

[jmssaws]

With a carb and unlimited coil how fast has anybody had one?
I've never heard one that sounded unlimited.

 

[jmester]

Do you think that the smaller Venturi on the tillotson has anything to do with how it is running. The tillotson HS 320 has an 18.3mm and the walbro wj have a Venturi of 19.05 mm.

 

[jmester]

When you where using the euro coil was it the stock key or advanced. I would think you could push some more fuel to help use up some of the timing.

 

[mdavlee]

Advanced so far it was making my tach go crazy once it was good and warm. I set it at 13.3k and then it was 12.9k and went like a limited coil.

 

[mdavlee]

Do you think that the smaller Venturi on the tillotson has anything to do with how it is running. The tillotson HS 320 has an 18.3mm and the walbro wj have a Venturi of 19.05 mm.

Not sure. It was able to flood it down and I kept leaning it out.