Dolmar 64xx/73xx/79xx series, smurfs and solo 665/675/681 thread

[RI Chevy]

Yup. Ok. Lol

 

[dustinwilt68]

Y'all know this is pointless right? We all know 365 owns this class, just pointing out the facts, carry on.

 

[huskyboy]

Y'all know this is pointless right? We all know 365 owns this class, just pointing out the facts, carry on.

@Armbru84 has a pretty hot 6400 by the looks of it. But yeah them 365 closed port saws are hard to beat for 4 cube racing it seems.

 

[RI Chevy]

Most cc's too

 

[dustinwilt68]

Not exactly, the solo 665 is 65 cc too....

 

[huskyboy]

For the races I’ll be grabbing a 365. For out in the woods working the dolmar and solo do have have a bit more torque. Longer stroke.

 

[RI Chevy]

Racing sawz is just plain silly...

 

[Deets066]

Not exactly, the solo 665 is 65 cc too....

65.8 or somthin, not usually permitted to run in the 4 cube

 

[huskyboy]

65.8 or somthin, not usually permitted to run in the 4 cube

6400 with a 665 cylinder would be interesting. 1mm less stroke. 64cc. Closed port. Hmmm.

 

[Deets066]

6400 with a 665 cylinder would be interesting. 1mm less stroke. 64cc. Closed port. Hmmm.

I’ve got one sitting here waiting for me to finish it

 

[huskihl]

Gaddammit
This is a dolly/solo thread. Taint no 365's allowed

 

[Marshy]

@huskihl, the 7900 you built me did great. It put a smile on Buckin's face. I think that's a success.


Tomorrow I'm going to run it with 110 octane with some methanol mix. I'll get some video for you.

 

[Wood Chopper]

That's awesome Marshy!

 

[RI Chevy]

Where did you meet up with him Wade? Cool

 

[dustinwilt68]

That 6400 is a good runner Mason, if you need another jug I might have one.

 

[huskyboy]

Looks like the solo 665 is a bad mfer to begin with to beat a ported 60cc saw in stock form. Says they both have new stihl RS chains. Not my video or my saws. Just something I found browsing the web.

 

[dahmer]

Racing sawz is just plain silly...

I agree, there’s no place to sit comfortably.

 

[mettee]

What are some port timing numbers for a 6400, it has to be way different that the 7900

 

[huskyboy]

What are some port timing numbers for a 6400, it has to be way different that the 7900

I didn’t put a wheel on it but I’ve heard the numbers they run are very different than the 7300/7900.

 

[huskyboy]

An older oem 7300 scored piston I have laying around on top and a oem 6400 piston on bottom. Tiny windows on the 7300 piston and bigger ones on 6400. Looks like they wanted more case compression with the 7300. I also attempted to fit a 7900 tapered wrist pin in the 6400 piston but it was too long.